Evaluation of the use of antivenom sera in the emergency service of a regional public hospital in Vitória da Conquista (BA), Brazil

Caroline Rocha Santana Márcio Galvão Oliveira About the authors

Abstract

This study aims to characterize the epidemiological profile of victims of scorpion and snakebite envenomations and to evaluate the adequacy of antivenom sera prescriptions. This is a cross-sectional study whose data sources were the envenomation notification information sheets of the Notifiable Diseases Information System in the city of Vitória da Conquista (BA), Brazil. We included information on scorpion or snakebite envenomations attended in the municipality in the period between July 2016 and June 2017. The data obtained and the variables of interest were analyzed according to the questions of this study. In the observed period, 293 victims of envenomations were treated. Of these, 149 (50.9%) were men, and 114 (38.9%) were 20-59 years old. In total, 235 (80.9%) cases of scorpionism and 58 (19.1%) of ophidism were reported. Of these, 203 (69.3%) were classified as mild, and in 200 (68.5%) cases, serum therapy was prescribed for the patients. Regarding the adequacy of the prescriptions, 172 (59.7%) were considered inadequate, and of these, the use of some vials above than indicated was the most frequent. The inappropriate prescription of antivenom sera occurred in approximately 60% of the evaluated cases. Despite this, most accidents were classified as mild - in young men.

Key words
Ophidic envenomation; Scorpion bites; Inappropriate use

Introduction

Scorpionism and ophidism are the main envenomations, and these events are considered neglected diseases by the World Health Organization11 World Health Organization (WHO). Rabies and envenomings. A neglected public health issue: report of a Consultative Meeting. Genebra: WHO; 2007., especially in tropical and subtropical countries or developing economies22 Chippaux JP. Snake-bites: appraisal of the global situation. Bull World Health Organ 1998; 76(5):515-524.

3 Furtado SS, Belmino JFB, Diniz AGQ, Leite RS. Epidemiology of scorpion envenomation in the state of Ceara, Northeastern BraziL. Rev Inst Med Trop São Paulo 2016; 58:15.

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Scorpionism stands out with more than 1 million cases reported per year. The Middle East, South America, India, Africa and Mexico are endemic areas of scorpions that are dangerous to human health66 Jalali A, Rahim F. Epidemiological review of scorpion envenomation in iran. Iran J Pharm Res IJPR 2014; 13(3):743-756.,77 Santos MSV, Silva CGL, Silva Neto B, Grangeiro Junior CRP, Lopes VHG, Teixeira Junior AG, Bezerra DA, Luna JVCP, Cordeiro JB, Gonçalves Júnior J, Lima MAP. Clinical and Epidemiological Aspects of Scorpionism in the World: A Systematic Review. Wilderness Environ Med 2016; 27(4):504-518.. In Brazil (with 90,922 cases reported in 2016)88 Brasil. Minitério da Saúde (MS). Tecnologia da Informação a Serviço do SUS (DATASUS). Acidentes por animais peçonhentos - notificações segundo tipo de acidente no Brasil em 2016 [página na Internet]. 2016 [acessado 2018 Jan 1]. Disponível em: http://tabnet.datasus.gov.br/cgi/tabcgi.exe?sinannet/cnv/animaisbr.def
http://tabnet.datasus.gov.br/cgi/tabcgi....
, species Tityus stigmurus, Tityus serrulatus, Tityus bahiensis and Tityus cambridgei are the primary cause of envenomations by scorpions77 Santos MSV, Silva CGL, Silva Neto B, Grangeiro Junior CRP, Lopes VHG, Teixeira Junior AG, Bezerra DA, Luna JVCP, Cordeiro JB, Gonçalves Júnior J, Lima MAP. Clinical and Epidemiological Aspects of Scorpionism in the World: A Systematic Review. Wilderness Environ Med 2016; 27(4):504-518.. In turn, ophidism has a high prevalence in Central and South America and Brazil. In 2016, more than 26,000 cases have been reported22 Chippaux JP. Snake-bites: appraisal of the global situation. Bull World Health Organ 1998; 76(5):515-524.,44 Wen FH, Monteiro WM, Silva AMM, Tambourgi DV, Silva IM, Sampaio VS, Santos MC, Sachett J, Ferreira LCL, Kalil J, Lacerda M. Snakebites and scorpion stings in the Brazilian Amazon: identifying research priorities for a largely neglected problem. PLoS Negl Trop Dis 2015; 9(5):e0003701.,88 Brasil. Minitério da Saúde (MS). Tecnologia da Informação a Serviço do SUS (DATASUS). Acidentes por animais peçonhentos - notificações segundo tipo de acidente no Brasil em 2016 [página na Internet]. 2016 [acessado 2018 Jan 1]. Disponível em: http://tabnet.datasus.gov.br/cgi/tabcgi.exe?sinannet/cnv/animaisbr.def
http://tabnet.datasus.gov.br/cgi/tabcgi....
,99 Leite RS, Targino ITG, Lopes YACF, Barros RM, Vieira AA. Epidemiology of snakebite accidents in the municipalities of the state of Paraíba, Brazil. Cien Saude Colet 2013; 18(5):1463-1471.. Most Brazilian ophidic envenomations are due to snakebites of the genus Bothrops (approximately 90% of cases reported) and Crotalus1010 Bertolozzi MR, Scatena CMC, Franca FOS. Vulnerabilities in snakebites in Sao Paulo, Brazil. Rev Saude Publica 2015; 49:82..

Ophidism and scorpionism can lead to severe clinical complications, including death22 Chippaux JP. Snake-bites: appraisal of the global situation. Bull World Health Organ 1998; 76(5):515-524.,1111 Abroug F, Souheil E, Ouanes I, Dachraoui F, Fekih-Hassen M, Ouanes Besbes L. Scorpion-related cardiomyopathy: Clinical characteristics, pathophysiology, and treatment. Clin Toxicol (Phila) 2015; 53(6):511-518.

12 Carmo EA, Nery AA, Jesus CS, Casotti CA. Hospitalizations due to external causes involving contact with animals in a general hospital in the interior of Bahia State, Brazil, 2009-2011. Epidemiol Serv Saude Rev Sist Unico Saude Bras 2016; 25(1):105-114.

13 Monteiro WM, Oliveira SS, Pivoto G, Alves EC, Sachett JAG, Alexandre CN, Fé NF, Guerra MB, Silva IM, Tavares AM, Ferreira LC, Lacerda MV. Scorpion envenoming caused by Tityus cf. silvestris evolving with severe muscle spasms in the Brazilian Amazon. Toxicon 2016; 119:266-269.

14 Saad K, El-Hamed MAA, Abo-Elela MGM, Ahmed AE, Abdel-Baseer KA, Aboul-Khair MD, Metwalley KA, El-Houfey AA, Hasan GM, El-Shareef AM. Neurologic Complications in Children With Scorpionism. J Child Neurol 2017; 32(6):537-542.

15 Albuquerque PLMM, Jacinto CN, Silva Júnior GB, Lima JB, Veras MSB, Daher EF. Acute kidney injury caused by Crotalus and Bothrops snake venom: a review of epidemiology, clinical manifestations and treatment. Rev Inst Med Trop São Paulo 2013; 55(5):295-301.
-1616 Evangelista GF, Azevedo CS. Arachnidism, scorpionism and ophidism in Ouro Preto Municipality, Minas Gerais State, Brazil. Rev Soc Bras Med Trop 2016; 49(6):786-789.. Local manifestations are the most common, especially pain, erythema and edema at the bite’s site. However, high venom amounts from these animals can lead to severe systemic manifestations such as respiratory, renal, vascular, cardiac or neurological dysfunction44 Wen FH, Monteiro WM, Silva AMM, Tambourgi DV, Silva IM, Sampaio VS, Santos MC, Sachett J, Ferreira LCL, Kalil J, Lacerda M. Snakebites and scorpion stings in the Brazilian Amazon: identifying research priorities for a largely neglected problem. PLoS Negl Trop Dis 2015; 9(5):e0003701.,77 Santos MSV, Silva CGL, Silva Neto B, Grangeiro Junior CRP, Lopes VHG, Teixeira Junior AG, Bezerra DA, Luna JVCP, Cordeiro JB, Gonçalves Júnior J, Lima MAP. Clinical and Epidemiological Aspects of Scorpionism in the World: A Systematic Review. Wilderness Environ Med 2016; 27(4):504-518.,1111 Abroug F, Souheil E, Ouanes I, Dachraoui F, Fekih-Hassen M, Ouanes Besbes L. Scorpion-related cardiomyopathy: Clinical characteristics, pathophysiology, and treatment. Clin Toxicol (Phila) 2015; 53(6):511-518.,1717 Cupo P. Clinical update on scorpion envenoming. Rev Soc Bras Med Trop 2015; 48(6):642-649.

18 Ranaweera GG, Bavanthan V, Nazar ALM, Lokuhetty MDS. Acute renal insufficiency after scorpion sting. Ceylon Med J 2015; 60(1):31-32.

19 Albuquerque PLMM, Silva Júnior GB, Jacinto CN, Lima JB, Lima CB, Amaral YS, Veras MS, Mota RM, Daher EF. Acute kidney injury after snakebite accident treated in a Brazilian tertiary care centre. Nephrology (Carlton) 2014; 19(12):764-770.
-2020 Cunha FC, Heerdt M, Torrez PPQ, Franca FOS, Molin GZD, Battisti R, Zannin M. First report of hepatic hematoma after presumed Bothrops envenomation. Rev Soc Bras Med Trop 2015; 48(5):633-635., and children are the most susceptible to post-poisoning complications2121Mishra OP, Prasad R. Myocardial dysfunction in children with scorpion sting envenomation. Indian Pediatr 2015; 52(4):291-292.

22 Mahadevan S, Rameshkumar R. Systemic manifestations in children with scorpion sting envenomation: how to manage? Indian J Pediatr 2015; 82(6):497-498.
-2323 Simon RB. Managing scorpion envenomation in children. Nursing (Lond) 2015; 45(1):13-15..

Patients who are scorpionism or ophidism victims are managed with the essential support of vital conditions, associated with symptomatic treatment and specific serum therapy, when necessary. Antiscorpionic serum therapy is only indicated in cases of “moderate” classification in children younger than ten years and all cases classified as severe2424 Fundação Ezequiel Dias (FUNED). Bula com informações ao Profissional de Saúde - soro antiescorpiônico. Belo Horizonte: FUNED; 2018.. Antiarachnidic serum (which includes antibodies against Tityus venom)2525 Brasil. Ministério da Saúde (MS). Guia de vigilância em saúde. Brasília: MS; 2014. may be used in the absence of antiscorpionic serum. In ophidism, treatment varies according to the snake’s genus, and the following sera are available in Brazil: bothropic (for envenomations with snakes of the genus Bothrops, such as jararaca), crotalic (for Crotalus bites) and elapid (for snakebites of the genus Micrurus, popularly known as coral snakes). Some associated sera (bothropic-laquetic and bothropic-crotalic) are used for situations in which the snake’s type is unknown, and the bothropic-laquetic serum is used mainly in envenomations where the snake involved is suspected to be of the genus Lachesis (more commonly known as surucucu)2525 Brasil. Ministério da Saúde (MS). Guia de vigilância em saúde. Brasília: MS; 2014.

26 Brasil. Ministério da Saúde (MS). Manual de diagnóstico e tratamento de acidentes por animais peçonhentos. Guia de vigilância em saúde. Brasília: MS; 2001.
-2727 Santos R. Contribuição da FUNED para a Produção de Soros Antivenenis e Antitóxicos no Brasil. Rev Min Saude Publica 2005; 6(5):13-19..

In 2016, the Brazilian Ministry of Health issued a note with guidelines on the need to adjust antivenom doses indicated for treatment due to jararacas and scorpion bites in an attempt to reduce waste, without prejudice to envenomation victims2828 Brasil. Ministério da Saúde (MS). Portal da Saúde. Nota Informativa: Informações da Coordenação-Geral de Doenças Transmissíveis (CGDT) referentes à nova abordagem ao tratamento em casos de acidentes por serpentes do grupo Bothrops ("jararacas") e por escorpiões, em situação de escassez de antivenenos [página na Internet]. 2016 [acessado 2018 Jan 1]. Disponível em: http://portalsaude.saude.gov.br/index.php/o-ministerio/principal/leia-mais-o-ministerio/197-secretaria-svs/24972-nova-abordagem-ao-tratamento-em-situacao-de-escassez-de-antivenenos
http://portalsaude.saude.gov.br/index.ph...
. However, several studies have shown low adherence of health professionals to the recommendations of clinical guidelines in several areas2929 Cowie MR, Komajda M. Quality of Physician Adherence to Guideline Recommendations for Life-saving Treatment in Heart Failure: an International Survey. Card Fail Rev 2017; 3(2):130-133.,3030 Merchant S, Proudfoot EM, Quadri HN, McElroy HJ, Wright WR, Gupta A, Sarpong EM. Risk factors for Pseudomonas aeruginosa infections consequences of inappropriate initial antimicrobial therapy: a systematic literature review meta-analysis. J Glob Antimicrob Resist 2018; 14:33-44.. This study aims to characterize the epidemiological profile of users who are victims of scorpion and snakebite accidents and to evaluate the suitability of antivenom sera prescriptions in the emergency service of a regional hospital.

Methods

This a cross-sectional study where secondary data on envenomations were analyzed through the Notifiable Diseases Information System (SINAN) in the city of Vitória da Conquista, Bahia, Brazil.

The General Hospital of Vitória da Conquista (HGVC) is a reference service for envenomations to the city of Vitória da Conquista and surrounding region (regions of scorpions of the genus Tityus and snakes of the genus Bothrops and Crotalus), attending daily victims of scorpionism and ophidism. Only the HGVC receives the sera in Vitória da Conquista, and when the patients use other services in the city, they are transferred to the HGVC or the sera are dispensed and transported to these services through a disease notification.

Data were collected from the envenomation notification reports released by the HGVC’s Epidemiological Surveillance in the SINAN. All notifications of scorpion or snake bites accidents were included in the period between July 2016 and June 2017. For the analysis of the adequacy of the requirements of the antivenom sera, we excluded notifications in which the type of envenomation had not been described (lack of identification of the poisonous animal causing the accident in the notification form), severity classification, presence or absence of serum therapy.

The criteria for adequate use of sera were built according to the severity classification of these accidents as per Brazilian serum therapy protocols in the Manual of Diagnosis and Treatment of Envenomations (2001)2626 Brasil. Ministério da Saúde (MS). Manual de diagnóstico e tratamento de acidentes por animais peçonhentos. Guia de vigilância em saúde. Brasília: MS; 2001. and in the Health Surveillance Guide (2014)2525 Brasil. Ministério da Saúde (MS). Guia de vigilância em saúde. Brasília: MS; 2014., updated by the Informative Note of the Ministry of the General Coordination of Communicable Diseases (2016)2828 Brasil. Ministério da Saúde (MS). Portal da Saúde. Nota Informativa: Informações da Coordenação-Geral de Doenças Transmissíveis (CGDT) referentes à nova abordagem ao tratamento em casos de acidentes por serpentes do grupo Bothrops ("jararacas") e por escorpiões, em situação de escassez de antivenenos [página na Internet]. 2016 [acessado 2018 Jan 1]. Disponível em: http://portalsaude.saude.gov.br/index.php/o-ministerio/principal/leia-mais-o-ministerio/197-secretaria-svs/24972-nova-abordagem-ao-tratamento-em-situacao-de-escassez-de-antivenenos
http://portalsaude.saude.gov.br/index.ph...
. Data on the type of event, severity classification, presence or absence of serum therapy, number of vials prescribed and type(s) of serum(sera) used were compared with the adequacy criteria. Thus, the described therapeutics were classified as adequate or inadequate. The observed inadequacies were classified as: “use of vials above than recommended”, “use of vial below than recommended” and “inappropriate serum type use”.

Data were tabulated in Microsoft® Office Excel 2010 database and analyzed using IBM SPSS Statistics® 20.0 software. Measurements of central tendency, dispersion and frequencies associated with the relevant variables were calculated, such as individual data (gender, age, municipality of residence, ethnicity/skin color, schooling), epidemiological data (area of occurrence, place of event, time elapsed between bite and treatment), clinical data (verifying whether or not local and systemic manifestations are present, as well as those evidenced in case of presence and classification of event severity) and data on the treatment adopted (presence or absence of serum therapy, number of vials prescribed and type(s) of serum(sera) used). The associations between categorical variables were verified through the Chi-square test, and we considered a statistically significant difference when the probability was < 0.05 (p < 0.05).

The Human Research Ethics Committee of the Multidisciplinary Health Institute of the Federal University of Bahia approved this research project.

Results

In total, 293 envenomation victims were treated during the study period. Of these, 149 (50.9%) were men. The age ranged from 3 months to 86 years at the time of the accident. Also, the adult age group (20-59 years of age) corresponded to 114 (38.9%) events. Regarding skin color, 127 (43.3%) self-referred as browns.

The results related to social characteristics show that 165 (56.3%) of these patients lived in urban or peri-urban areas. Regarding the schooling of victims, we could observe that 50 (17%) stated that they had three full study years or less (Table 1).

Table 1
Sociodemographic characteristics of the victims of envenomations treated in the municipality of Vitória da Conquista (BA), Brazil, from July 2016 to June 2017.

Concerning the venomous animal involved in the reported events, 235 (80.9%) were caused by scorpions and 58 (19.1%) by snakes. Of the ophidic accidents, the most frequent were bothropic, with 41 (70.6%) cases, and crotalic, with 12 (20.8%) (Table 2).

Table 2
Epidemiological characteristics of envenomations treated in the municipality of Vitória da Conquista (BA), Brazil, from July 2016 to June 2017 (N = 293).

Figure 1 shows the description of the number of events occurred in each month of the observation period. The period from December 2016 to March 2017 was the one with the highest incidence in cases of scorpionism and ophidism, and January 2017 was the month with the highest number of events reported for these two conditions (37 and 16 cases, respectively).

Figure 1
Distribution of the number of envenomations treated in the municipality of Vitória da Conquista (BA), Brazil, from July 2016 to June 2017.

Regarding the place of occurrence, envenomations occurred in 20 different municipalities in the southwest region of Bahia, and 249 (85%) were in the city of Vitória da Conquista (Table 2). Regarding the area of occurrence, it was possible to observe that 55 (94.8%) ophidic accidents occurred in rural areas, while 154 (65.5%) scorpionic accidents occurred in urban or peri-urban areas. There was a significant difference in the distribution of the area of occurrence concerning the type of accident (p < 0.05).

In 110 (37.5%) of the reported cases, treatment occurred more than one hour and up to 3 hours after the accident with the animal. Foot/toe (120 cases, 41%) and hand/fingers (96 cases, 32.8%) were the most common bite sites (Table 2).

Regarding the clinical signs and symptoms, 270 (92.2%) patients evidenced local manifestations, and of these, 268 (99.2%) presented local pain. Patients had systemic manifestations in 54 (18.4%) of the total cases. Regarding the severity of accidents, 203 (69.3%) were classified as mild, 72 (24.6%) as moderate and 13 (4.4%) as severe (Table 3). Accident severity was associated with a shorter time elapsed between the accident and treatment (p = 0.01). Concerning treatment, in 200 (68.5%) of the cases, serum therapy was prescribed for these patients. As for outcomes, 239 (81.6%) of the cases developed to cure (Table 3).

Table 3
Clinical characteristics of envenomations treated in the city of Vitória da Conquista (BA), Brazil, from July 2016 to June 2017 (N = 293).

The prescribed serum therapies were found to be inadequate in 172 (59.7%) of the attendances. Of the total number of inadequate treatments, the number of vials above than indicated was more frequent (124; 72.1%), totaling 323 vials prescribed more than recommended in the protocols (Table 4). There was a significant difference in the distribution of the type of inadequacy concerning the type of accident (p <0.01). Ophidic accidents inadequacies were of the kind “below than recommended use of vials”, whereas serum therapy inadequacies in scorpionic events are associated with above than the recommended use of vials in protocols.

Table 4
Analysis of serum therapy adequacy prescribed in envenomations treated in Vitória da Conquista (BA), Brazil, from July 2016 to June 2017 (N = 288).

Discussion

The results presented showed that the inappropriate prescription of antivenom sera occurred in most of the users attended (59.7%). Both the prescribed sub-dose and overdoses are more likely to cause adverse events. Rational use of medicines should include the establishment of the actual product use need, as well as adequate forms, dosages, and duration of treatment3131 World Health Organization (WHO). Rational use of drugs. J Fam Welf [periódico na Internet]. 1985 [acessado 2018 Jan 1]; 50:92-94. Disponível em: http://medind.nic.in/jah/t04/s1/jaht04s1p92g.pdf
http://medind.nic.in/jah/t04/s1/jaht04s1...
.

Despite the wide dissemination of clinical guidelines, some studies point to problems with little or no adherence to treatment protocols in the most diverse areas2929 Cowie MR, Komajda M. Quality of Physician Adherence to Guideline Recommendations for Life-saving Treatment in Heart Failure: an International Survey. Card Fail Rev 2017; 3(2):130-133.,3030 Merchant S, Proudfoot EM, Quadri HN, McElroy HJ, Wright WR, Gupta A, Sarpong EM. Risk factors for Pseudomonas aeruginosa infections consequences of inappropriate initial antimicrobial therapy: a systematic literature review meta-analysis. J Glob Antimicrob Resist 2018; 14:33-44.. Other studies show that it is necessary to know the factors underlying the decision-making of these professionals3232 Bradley CP. Decision making and prescribing patterns - A literature review. Fam Pract 1991; 8(3):276-287.

33 Bradley CP. Prescribing decisions in general practice--learning and changing. Occas Pap R Coll Gen Pract 1995; 69:10-12.
-3434 Néri EDR, Viana PR, Campos TA. Dicas Para Uma Boa Prescrição Hospitalar. Fortaleza: Hospital Universitário Walter Cantídio; 2008. to understand the varying prescriptions among prescribers. The high turnover of physicians at the facility, the incipient consultation materials, possible failures in the dissemination of protocols and the lack of regular training on the diagnosis and treatment of envenomations can be cited as factors that may influence these prescriptions in the study hospital. Also, the Ministry of Health’s briefing note on the approach to treatment in cases of accidents involving snakes of the genus Bothrops and scorpions2828 Brasil. Ministério da Saúde (MS). Portal da Saúde. Nota Informativa: Informações da Coordenação-Geral de Doenças Transmissíveis (CGDT) referentes à nova abordagem ao tratamento em casos de acidentes por serpentes do grupo Bothrops ("jararacas") e por escorpiões, em situação de escassez de antivenenos [página na Internet]. 2016 [acessado 2018 Jan 1]. Disponível em: http://portalsaude.saude.gov.br/index.php/o-ministerio/principal/leia-mais-o-ministerio/197-secretaria-svs/24972-nova-abordagem-ao-tratamento-em-situacao-de-escassez-de-antivenenos
http://portalsaude.saude.gov.br/index.ph...
, in the event of a shortage of antivenom, was published in a period very close to the observation period of the study.

It must be remembered that medical prescription is a complex document that guides the treatment plan for each patient. In the medication process, responsibilities must be shared and decision-making supported by other health areas3434 Néri EDR, Viana PR, Campos TA. Dicas Para Uma Boa Prescrição Hospitalar. Fortaleza: Hospital Universitário Walter Cantídio; 2008.. The effective insertion of a multidisciplinary urgent/emergency care team in the treatment of envenomation victims could be a measure to reduce the inadequacies pointed out in our data since several studies show that professionals such as pharmacists and nurses can act collaboratively with prescribers3535 Douglass AM, Elder J, Watson R, Kallay T, Kirsh D, Robb WG, Kaji AH, Coil CJ. A Randomized Controlled Trial on the Effect of a Double Check on the Detection of Medication Errors. Ann Emerg Med 2018; 71(1):74-82.

36 Cohen V, Jellinek SP, Hatch A, Motov S. Effect of clinical pharmacists on care in the emergency department: A systematic review. Am J Heal Pharm 2009; 66(15):1353-1361.
-3737 Proper JS, Wong A, Plath AE, Grant KA, Just DW, Dulhunty JM. Impact of clinical pharmacists in the emergency department of an Australian public hospital: A before and after study. Emerg Med Australas 2015; 27(3):232-238..

A study conducted in Australia that evaluated the impact of clinical pharmacists on the emergency unit of a mid-sized hospital showed that these professionals contributed to a review of medical prescriptions, drug interventions, and staff guidelines on medications, which could decrease prescription and the inadequate administration of anti-venom sera and other therapies used in the unit3737 Proper JS, Wong A, Plath AE, Grant KA, Just DW, Dulhunty JM. Impact of clinical pharmacists in the emergency department of an Australian public hospital: A before and after study. Emerg Med Australas 2015; 27(3):232-238.. A systematic review of the performance of these professionals also evidenced these advantages and also concluded that there was a reduction of costs and hospital wastes associated with this performance3636 Cohen V, Jellinek SP, Hatch A, Motov S. Effect of clinical pharmacists on care in the emergency department: A systematic review. Am J Heal Pharm 2009; 66(15):1353-1361..

We observed that among the inadequacies found in this present study, the most frequent was vial use above than recommended by the national protocols (72.1% of the inadequacies were classified as overdose). Drug overdosing may expose patients to the adverse reactions resulting from the use of these sera - anaphylactic or anaphylactoid, and early or late reactions, such as Serum Disease3838 Instituto Butantan. Bula profissional - soro antiescorpiônico. São Paulo: Instituto Butantã; 2017.. Furthermore, there were records of recurrent crises in the supply of antivenom sera alerted by the Ministry of Health, whether due to the adequacy and refurbishment of the laboratories that produce them or to a decreased production or shortage of the raw material2828 Brasil. Ministério da Saúde (MS). Portal da Saúde. Nota Informativa: Informações da Coordenação-Geral de Doenças Transmissíveis (CGDT) referentes à nova abordagem ao tratamento em casos de acidentes por serpentes do grupo Bothrops ("jararacas") e por escorpiões, em situação de escassez de antivenenos [página na Internet]. 2016 [acessado 2018 Jan 1]. Disponível em: http://portalsaude.saude.gov.br/index.php/o-ministerio/principal/leia-mais-o-ministerio/197-secretaria-svs/24972-nova-abordagem-ao-tratamento-em-situacao-de-escassez-de-antivenenos
http://portalsaude.saude.gov.br/index.ph...
. Thus, the waste of anti-ophidic and anti-scorpionic sera (observed in the sum of 325 vials prescribed in excess) may contribute to the shortage of these drugs.

In contrast, in this study, we found that serum therapy used for ophidism is significantly associated with the inadequacy type of “use of vials below than recommended”. It is worth emphasizing that the fact that there are periods of shortage of anti-ophidic sera at the time of observation in the institution may have collaborated with the prescriptions of some vials below than indicated in the guidelines. However, it is noted that the sub-dose is one of the problems related to medications that may interfere with the effectiveness of the therapy and, consequently, the clinical outcome of these patients3939 Santos H, Iglésias P, Fernández-Llimós F, Faus MJ, Rodrigues LM. Segundo Consenso de Granada sobre Problemas Relacionados con Medicamentos. Ars Pharm 2004; 43(3-4):175-184..

The sociodemographic characteristics of the studied population are similar to those of an earlier study, conducted in São Paulo, which showed a higher frequency of ophidism victims among men, adults of active working age, low educational level and residents in rural areas1010 Bertolozzi MR, Scatena CMC, Franca FOS. Vulnerabilities in snakebites in Sao Paulo, Brazil. Rev Saude Publica 2015; 49:82.. Other studies carried out in Goiás4040 Souza LM, Pinto RNL, Feitosa DT, Júnior Silva NJ. Estudo retrospectivo do escorpionismo no Estado de Goiás. EVS PUC GO 2017; 44:110-114., Rio Grande do Norte4141 Tavares AV, Araújo KAM, Marques MRV, Vieira AA, Leite RS. The epidemiology of snakebite in the Rio Grande do Norte State, Northeastern Brazil. Rev Inst Med Trop São Paulo 2017; 59:e52., Santa Catarina4242 Quadros RM, Varela AR, Czarin MG, Marques SMT. Acidentes escorpiônicos notificados pelo SINAN na Região Serrana de Santa Catarina, Brasil, 2000-2010. REB 2014; 7(1):96-108., Minas Gerais4343 Lima JS, Martelli Júnior H, Martelli DRB, Silva MS, Carvalho SFG, Canela JDR, Bonan PRF. Perfil dos acidentes ofídicos no norte do Estado de Minas Gerais, Brasil. Rev Soc Bras Med Trop 2009; 42(5):561-564., and Amazonas4444 Costa CLSO, Fe NF, Sampaio I, Tadei WP. A profile of scorpionism, including the species of scorpions involved, in the State of Amazonas, Brazil. Rev Soc Bras Med Trop 2016; 49(3):376-379. also obtained profiles of envenomation victims, indicating the similarity of these characteristics in the different Brazilian regions.

Our results show high user age variability and that all age groups are susceptible to these accidents. Other studies that analyze the sociodemographic profile of victims of these accidents also showed that most of them were in the adult age group1616 Evangelista GF, Azevedo CS. Arachnidism, scorpionism and ophidism in Ouro Preto Municipality, Minas Gerais State, Brazil. Rev Soc Bras Med Trop 2016; 49(6):786-789.,2525 Brasil. Ministério da Saúde (MS). Guia de vigilância em saúde. Brasília: MS; 2014.,2626 Brasil. Ministério da Saúde (MS). Manual de diagnóstico e tratamento de acidentes por animais peçonhentos. Guia de vigilância em saúde. Brasília: MS; 2001.. This data can be justified by the fact that this age group contains active workers, especially rural workers, who are more likely to find venomous animals during their work routine2626 Brasil. Ministério da Saúde (MS). Manual de diagnóstico e tratamento de acidentes por animais peçonhentos. Guia de vigilância em saúde. Brasília: MS; 2001..

The seasonality of envenomation accidents in the summer months has been evidenced in the data shown here. This period of higher accident incidence coincides with wetter months, especially summer months, a result similar to that found in several studies1616 Evangelista GF, Azevedo CS. Arachnidism, scorpionism and ophidism in Ouro Preto Municipality, Minas Gerais State, Brazil. Rev Soc Bras Med Trop 2016; 49(6):786-789.,2525 Brasil. Ministério da Saúde (MS). Guia de vigilância em saúde. Brasília: MS; 2014.,4040 Souza LM, Pinto RNL, Feitosa DT, Júnior Silva NJ. Estudo retrospectivo do escorpionismo no Estado de Goiás. EVS PUC GO 2017; 44:110-114.,4242 Quadros RM, Varela AR, Czarin MG, Marques SMT. Acidentes escorpiônicos notificados pelo SINAN na Região Serrana de Santa Catarina, Brasil, 2000-2010. REB 2014; 7(1):96-108.,4545 Albuquerque PLMM, Silva Junior GB, Jacinto CN, Lima CB, Lima JB, Veras MSB, Daher EF. Epidemiological profile of snakebite accidents in a metropolitan area of northeast Brazil. Rev Inst Med Trop São Paulo 2013; 55(5):347-351.

46 Oliveira FN, Brito MT, Cristina I, Morais O, Maria S, Fook L, Albuquerque HN. Accidents caused by Bothrops and Bothropoides in the State of Paraiba: epidemiological and clinical aspects. Rev Soc Bras Med Trop 2010; 43(6):662-667.

47 Coelho JS, Ishikawa EAY, Santos PRSG, Pardal PPO. Scorpionism by Tityus silvestris in eastern Brazilian Amazon. J Venom Anim Toxins Incl Trop Dis 2016; 22(1):24.
-4848 Leite IC, Valente JG, Schramm JMA, Daumas RP, Rodrigues RN, Santos MF, Oliveira AF, Silva RS, Campos MR, Mota JC. Carga de doença no Brasil e suas regiões, 2008. Cad Saude Publica 2015; 31(7):1551-1564.. In a systematic review of the clinical and epidemiological characteristics of scorpionism, a correlation was recorded between scorpion-related accidents by and rainfall values above 30 mm/month77 Santos MSV, Silva CGL, Silva Neto B, Grangeiro Junior CRP, Lopes VHG, Teixeira Junior AG, Bezerra DA, Luna JVCP, Cordeiro JB, Gonçalves Júnior J, Lima MAP. Clinical and Epidemiological Aspects of Scorpionism in the World: A Systematic Review. Wilderness Environ Med 2016; 27(4):504-518.. This phenomenon can be explained by the fact that once the rain floods the shelters of scorpions, it forces them to look for new refuges and cross the environments we share77 Santos MSV, Silva CGL, Silva Neto B, Grangeiro Junior CRP, Lopes VHG, Teixeira Junior AG, Bezerra DA, Luna JVCP, Cordeiro JB, Gonçalves Júnior J, Lima MAP. Clinical and Epidemiological Aspects of Scorpionism in the World: A Systematic Review. Wilderness Environ Med 2016; 27(4):504-518.,4949 Clivatti J, Sakata RK, Issy AM. Review of the use of Gabapentin in the Control of Postoperative Pain. Brazilian J Anesthesiol 2009; 59(1):87-98.. Similarly, in the warmer and wetter months, the increased activity of rural workers exposes them to contact with snakes2525 Brasil. Ministério da Saúde (MS). Guia de vigilância em saúde. Brasília: MS; 2014.,2626 Brasil. Ministério da Saúde (MS). Manual de diagnóstico e tratamento de acidentes por animais peçonhentos. Guia de vigilância em saúde. Brasília: MS; 2001.. Also, higher temperatures favor the mating and reproduction of scorpions, snakes, and spiders33 Furtado SS, Belmino JFB, Diniz AGQ, Leite RS. Epidemiology of scorpion envenomation in the state of Ceara, Northeastern BraziL. Rev Inst Med Trop São Paulo 2016; 58:15.,4444 Costa CLSO, Fe NF, Sampaio I, Tadei WP. A profile of scorpionism, including the species of scorpions involved, in the State of Amazonas, Brazil. Rev Soc Bras Med Trop 2016; 49(3):376-379.,4747 Coelho JS, Ishikawa EAY, Santos PRSG, Pardal PPO. Scorpionism by Tityus silvestris in eastern Brazilian Amazon. J Venom Anim Toxins Incl Trop Dis 2016; 22(1):24.,5050 Superintendência de Controle de Endemias, Secretaria de Estado da Saú de São Paulo. Integrated management for the prevention of proliferation of dengue and leishmaniosis vectors and scorpions. Rev Saude Publica 2007; 41(2):317-320..

It was also possible to observe that most envenomations are scorpionic and, among the ophidic accidents, the bothropic (caused by jararacas) was the most prevalent (70.6%). These frequencies are similar to other epidemiological studies since snakes of the genus Bothrops have a wide geographic distribution in Brazil, are common in several ecosystems and tend to react aggressively when they feel threatened99 Leite RS, Targino ITG, Lopes YACF, Barros RM, Vieira AA. Epidemiology of snakebite accidents in the municipalities of the state of Paraíba, Brazil. Cien Saude Colet 2013; 18(5):1463-1471.,4545 Albuquerque PLMM, Silva Junior GB, Jacinto CN, Lima CB, Lima JB, Veras MSB, Daher EF. Epidemiological profile of snakebite accidents in a metropolitan area of northeast Brazil. Rev Inst Med Trop São Paulo 2013; 55(5):347-351.,4646 Oliveira FN, Brito MT, Cristina I, Morais O, Maria S, Fook L, Albuquerque HN. Accidents caused by Bothrops and Bothropoides in the State of Paraiba: epidemiological and clinical aspects. Rev Soc Bras Med Trop 2010; 43(6):662-667..

There was a statistically significant difference in the area of occurrence between ophidism and scorpionism, and the former is more prevalent in the rural area and the latter in the urban/periurban zone. The rural area was the area with the highest occurrence of ophidic accidents (94.8%) since rural and hunting activities expose workers to contact with snakes4343 Lima JS, Martelli Júnior H, Martelli DRB, Silva MS, Carvalho SFG, Canela JDR, Bonan PRF. Perfil dos acidentes ofídicos no norte do Estado de Minas Gerais, Brasil. Rev Soc Bras Med Trop 2009; 42(5):561-564.,5151 Santana V, Suchara E. Epidemiologia dos acidentes com animais peçonhentos registrados em Nova Xavantina - MT. Rev Epidemiol Control Infect 2015; 5(3):141-146.. In turn, scorpionic accidents occurred mostly in the urban/periurban area (65.5%), as has already been shown in other studies33 Furtado SS, Belmino JFB, Diniz AGQ, Leite RS. Epidemiology of scorpion envenomation in the state of Ceara, Northeastern BraziL. Rev Inst Med Trop São Paulo 2016; 58:15.,5252 Reckziegel GC, Pinto VL. Scorpionism in Brazil in the years 2000 to 2012. J Venom Anim Toxins Incl Trop Dis 2014; 20(1):1-8., and is because the urban environment provides favorable conditions for shelter and proliferation of scorpions (higher temperatures, humidity, and presence of litter)77 Santos MSV, Silva CGL, Silva Neto B, Grangeiro Junior CRP, Lopes VHG, Teixeira Junior AG, Bezerra DA, Luna JVCP, Cordeiro JB, Gonçalves Júnior J, Lima MAP. Clinical and Epidemiological Aspects of Scorpionism in the World: A Systematic Review. Wilderness Environ Med 2016; 27(4):504-518..

Regarding the areas of occurrence of the incidents, it was possible to notice that, during the observed period, the study hospital received patients from 21 different cities, in addition to Vitória da Conquista. The diverse nature of inhabitants is justified by the fact that this institution is the reference unit in the care of envenomation victims since the city of Vitória da Conquista is a health region and reference of the macro-region of 74 neighboring cities5353 Brasil. Ministério da Saúde (MS), SESAB. Regiões de Saúde do Estado da Bahia. Territórios de Identidade [página na Internet]. 2014 [acessado 2017 Set 20]. Disponível em: http://www1.saude.ba.gov.br/mapa_bahia/Result_Territorioch.asp
http://www1.saude.ba.gov.br/mapa_bahia/R...
(Table 5).

Table 5
Place of occurrence of envenomations treated in the city of Vitória da Conquista (BA), Brazil, from July 2016 to June 2017 (N = 293).

Most accidents recorded during the period were mild (69.3%), as described in other studies33 Furtado SS, Belmino JFB, Diniz AGQ, Leite RS. Epidemiology of scorpion envenomation in the state of Ceara, Northeastern BraziL. Rev Inst Med Trop São Paulo 2016; 58:15.,4343 Lima JS, Martelli Júnior H, Martelli DRB, Silva MS, Carvalho SFG, Canela JDR, Bonan PRF. Perfil dos acidentes ofídicos no norte do Estado de Minas Gerais, Brasil. Rev Soc Bras Med Trop 2009; 42(5):561-564.,4646 Oliveira FN, Brito MT, Cristina I, Morais O, Maria S, Fook L, Albuquerque HN. Accidents caused by Bothrops and Bothropoides in the State of Paraiba: epidemiological and clinical aspects. Rev Soc Bras Med Trop 2010; 43(6):662-667.. This may be associated with the short intervals between the bite and care received. In this study, most of the victims were treated within 3 hours after the bite and, as already reported in the literature, the speed of care is directly related to the accident’s development1616 Evangelista GF, Azevedo CS. Arachnidism, scorpionism and ophidism in Ouro Preto Municipality, Minas Gerais State, Brazil. Rev Soc Bras Med Trop 2016; 49(6):786-789.,2626 Brasil. Ministério da Saúde (MS). Manual de diagnóstico e tratamento de acidentes por animais peçonhentos. Guia de vigilância em saúde. Brasília: MS; 2001..

On the other hand, despite the predominance of mild accidents, in most cases (68.3%), serum therapy was prescribed and 19.6% of the users developed with systemic manifestations (of greater severity than the local ones). Mortality of envenomation victims was 1%. However, we cannot infer a possible relationship between inadequate treatment and death due to the lack of data on comorbidities.

We can point out that the possible failures in filling out the notification sheets and the unavailability of variables in these records that contained possible additional antivenom sera prescriptions as limitations of this study.

We should stress that these data show the relevance of this cause of morbimortality of the population of Vitória da Conquista and region and the need to build public policies aimed at reducing adverse outcomes from these accidents. Also, due to results with a high frequency of inadequate sera prescriptions presented and discussed herein, it is evident that the institution must develop strategies to subsidize measures that ensure the rational use of this supply and control of its waste.

The insertion of the multidisciplinary health team, in particular, the clinical pharmacist, in the urgent and emergency care unit can act in the review of the medical prescriptions, interventions related to the antivenom sera and guidance of the team on the use of these medicines - measures that can contribute significantly to reducing these inadequacies.

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Publication Dates

  • Publication in this collection
    06 Mar 2020
  • Date of issue
    Mar 2020

History

  • Received
    24 Feb 2018
  • Accepted
    27 June 2018
  • Published
    29 June 2018
ABRASCO - Associação Brasileira de Saúde Coletiva Rio de Janeiro - RJ - Brazil
E-mail: revscol@fiocruz.br