Livestock herding and Fulani ethnicity are a combined risk factor for development of early adverse reactions to antivenom treatment: Findings from a cross-sectional study in Nigeria



Menzies, Stefanie K ORCID: 0000-0002-9273-9296, Thomas, Aniekan O, Tianyi, Frank-Leonel, Abubakar, Saidu B, Nasidi, Abdulsalami, Durfa, Nandul, Patel, Rohit, Trelfa, Anna, Lalloo, David G ORCID: 0000-0001-7680-2200, Habib, Abdulrazaq G
et al (show 1 more authors) (2021) Livestock herding and Fulani ethnicity are a combined risk factor for development of early adverse reactions to antivenom treatment: Findings from a cross-sectional study in Nigeria. PLOS NEGLECTED TROPICAL DISEASES, 15 (8). e0009518-.

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Abstract

<h4>Background</h4>Adverse reactions to antivenom considerably complicate the clinical management of snakebite envenomed patients because it necessitates a temporary suspension of life-saving antivenom, increases costs and can compromise patient outcomes. This study sought to explore the association between cattle-herding occupation and ethnic group and the occurrence of early adverse reactions to antivenom.<h4>Methods</h4>This cross-sectional study was conducted between the 25th April and 11th July 2011 at the Kaltungo General Hospital in north east Nigeria. The exposure variable of cattle-herding occupation showed a strong correlation with the ethnic group variable, thus these were combined into a new variable with three categories (Fulani and herder, either Fulani or herder, and neither Fulani nor herder). The outcome variable was the occurrence of early adverse reactions, defined as any new symptoms occurring within 6 hours of antivenom administration. Odds Ratios were estimated using multivariable logistic regression models controlling for potential confounders.<h4>Results</h4>Among 231 envenomed snakebite victims, the overall incidence of early adverse reactions was 11.9% (95% confidence intervals: 8.0-16.9%). Patients who were Fulani and herders had a higher incidence of early adverse reactions compared to patients who were neither Fulani nor herders (20% vs 5.7%). After adjusting for age and gender, victims who were Fulani and herders were 5.9 times more likely to have an early adverse reaction, compared to victims who were neither Fulani nor herders (95% CI: 1.88-18.59; p = 0.002).<h4>Interpretation</h4>To the best of our knowledge, this is the first study to provide evidence of higher odds of early adverse reactions among patients from a particular occupation and/or ethnic group. We recommend that snake envenomed patients of Fulani origin be especially closely monitored for adverse reactions, that hospitals receiving these patients be appropriately resourced to manage both envenoming and adverse reactions and that premedication with adrenaline should be considered. Our findings provide an argument for speculation on the influence of immunological or lifestyle-related differences on the occurrence of early adverse reactions to antivenom.

Item Type: Article
Uncontrolled Keywords: Animals, Cattle, Humans, Snake Bites, Antivenins, Logistic Models, Risk Factors, Cross-Sectional Studies, Adult, Occupations, Nigeria, Female, Male, Young Adult, Livestock, Drug-Related Side Effects and Adverse Reactions, Ethnicity
Divisions: Faculty of Health and Life Sciences
Faculty of Health and Life Sciences > Institute of Infection, Veterinary and Ecological Sciences
Depositing User: Symplectic Admin
Date Deposited: 08 Feb 2022 14:49
Last Modified: 18 Jan 2023 21:13
DOI: 10.1371/journal.pntd.0009518
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3148526