Sero-prevalence and risk factors for human brucellosis in Marsabit county, Kenya (2014)



Kahariri, Samuel Maina, Kitala, Philip Mwanzia, Muchemi, Gerald Mwangi, Njenga, Kariuki and Nanyingi, Mark ORCID: 0000-0001-7485-6416
(2021) Sero-prevalence and risk factors for human brucellosis in Marsabit county, Kenya (2014). PAMJ - One Health, 4.

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Abstract

Introduction: brucellosis is among the world's most widespread zoonotic diseases which is recognized as a public health concern in both developed and developing countries. It is endemic in Kenya's pastoral communities where it is associated with significant economic losses due to decreased animal productivity and high burden in humans. The objectives of this study were: i) To estimate the sero-prevalence and determine the risk factors of brucellosis in humans ii) To assess the knowledge attitude and practices (KAP) of a pastoral community in relation to brucellosis transmission and control. Methods: cross-sectional survey was conducted within the pastoral ecosystem of Marsabit County. A total of 227 households were randomly selected. Blood samples were aseptically drawn from the selected humans and tested for Brucella immunoglobulin G (IgG) antibodies. Questionnaires were administered via personal interviews to the head of each study household to assess risk factors of transmission. Univariate and subsequently multivariate logistic regression analysis were performed examine the factors independently associated with Brucella seropositivity after adjustment for the effects of other explanatory variables. Results: the individual Brucella sero-prevalence was estimated at 44% (332/755) and that of the household at (73.13%). Although the majority (85.5%) of the respondents had heard of brucellosis, only a few could identify the disease by clinical signs in both humans and animals. The majority (88.5%) engaged in practices that were likely to enhance Brucella transmission and thus spread. Being a male herder increased the risk of infection by almost twice (OR=1.8136) compared to females. People who were either students, farmers, skilled or non-skilled off farm workers were less likely (OR=0.3053, 0.9038, 0.7749 and 0.2010 respectively) to be infected with brucellosis than housewives. Households where milk was boiled before consumption were less likely (OR=0.404) to have a higher rate of brucellosis infection than those who consumed raw milk. Households that used milk from their own animals were much less likely (OR= 0.1754) to have infection than those that use milk from other sources. Households that kept sheep and those that had members who assisted animals during delivery were more likely to have higher rates of brucellosis than those who never kept sheep and those who never assisted in delivery respectively. Conclusion: brucellosis is endemic in Marsabit County despite the low levels of knowledge and good control practices by the community. Consumption of raw milk and close contact with animal, particularly sheep are the highest risk factors There is a need for implementation of effective prevention strategies and advocacy practices like targeted livestock vaccinations and public education.

Item Type: Article
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: 04 May 2023 14:26
Last Modified: 17 Mar 2024 16:14
DOI: 10.11604/pamj-oh.2021.4.9.27024
Open Access URL: https://www.one-health.panafrican-med-journal.com/...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3170175