Seroprevalence and Risk Factors of Brucellosis in Sedentary Livestock Farms of Hadjer-Lamis Province (Chad)

Authors

Abstract

Brucellosis remains a major bacterial zoonosis affecting both livestock health and public health, causing severe economic losses in developing countries. This study aimed to determine the seroprevalence of brucellosis and identify the associated risk factors within sedentary livestock farms in Hadjer-Lamis Province, Chad. A cross-sectional epidemiological study was carried out between May 2024 and September 2025. A total of 299 blood samples were randomly collected from cattle, sheep, goats, and dromedaries in various sedentary farms. The collected sera were systematically screened using the Rose Bengal Test (RBT) to detect antibodies against Brucella spp. The overall seroprevalence of the region was 6.69% (20/299). Among the tested animals, cattle exhibited the highest prevalence rate at 8.86%. Following multivariate logistic regression analysis adjustment, only the cattle species demonstrated a significant association with brucellosis seropositivity (aOR = 3.21; 95% CI : 1.07–9.62 ; p = 0.038). This field study confirms the active circulation of Brucella spp. in Hadjer-Lamis Province. The findings highlight an urgent public health need to introduce the Rose Bengal Test as a mandatory sanitary prerequisite before the commercialization of fresh raw milk or its processing into dairy products in sedentary livestock farms to mitigate human contamination risks.

Keywords : Brucellosis, Sedentary livestock farming, Risk factors, Rose Bengal, Chad.

Keywords:

Brucellosis, Sedentary livestock farming, Risk factors, Rose Bengal, Chad

DOI

https://doi.org/10.22270/jddt.v16i7.7878

Author Biographies

Miambaye Djimet, Research Institute in Livestock for Development (IRED). PO Box : 433, N’Djamena, Chad.

Research Institute in Livestock for Development (IRED). PO Box : 433, N’Djamena, Chad. 

Richard Bongo Nare Ngandolo, Research Institute in Livestock for Development (IRED). PO Box : 433, N’Djamena, Chad.

Research Institute in Livestock for Development (IRED). PO Box : 433, N’Djamena, Chad. 

Mahamat Seid Abdelwahid, Research Institute in Livestock for Development (IRED). PO Box : 433, N’Djamena, Chad.

Research Institute in Livestock for Development (IRED). PO Box : 433, N’Djamena, Chad. 

Rahila Loum Gazida, Research Institute in Livestock for Development (IRED). PO Box : 433, N’Djamena, Chad.

Research Institute in Livestock for Development (IRED). PO Box : 433, N’Djamena, Chad. 

Zachee Belpena, University of N’Djamena, Doctoral School of Sciences-Techniques-Environment, Doctoral Training in Animal Health and Production. PO Box : 1117, Route de Farcha, N’Djamena, Chad.

Research Institute in Livestock for Development (IRED). PO Box : 433, N’Djamena, Chad.

 

Mbailaou Mbaiguinam, University of Sarh, Faculty of Sciences and Technology, Department of Biology and Geology, PO Box 105 Sarh, Chad.

University of N’Djamena, Doctoral School of Sciences-Techniques-Environment, Doctoral Training in Animal Health and Production. PO Box : 1117, Route de Farcha, N’Djamena, Chad.

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2026-07-15
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How to Cite

1.
Djimet M, Ngandolo RBN, Abdelwahid MS, Gazida RL, Belpena Z, Mbaiguinam M. Seroprevalence and Risk Factors of Brucellosis in Sedentary Livestock Farms of Hadjer-Lamis Province (Chad). J. Drug Delivery Ther. [Internet]. 2026 Jul. 15 [cited 2026 Jul. 16];16(7):70-7. Available from: https://www.jddtonline.info/index.php/jddt/article/view/7878

Issue

Vol. 16 No. 7 (2026): Volume 16, Issue 7, July 2026

Section

Research

Copyright (c) 2026 Miambaye Djimet, Richard Bongo Nare Ngandolo, Mahamat Seid Abdelwahid, Rahila Loum Gazida, Zachee Belpena, Mbailaou Mbaiguinam

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How to Cite

1.
Djimet M, Ngandolo RBN, Abdelwahid MS, Gazida RL, Belpena Z, Mbaiguinam M. Seroprevalence and Risk Factors of Brucellosis in Sedentary Livestock Farms of Hadjer-Lamis Province (Chad). J. Drug Delivery Ther. [Internet]. 2026 Jul. 15 [cited 2026 Jul. 16];16(7):70-7. Available from: https://www.jddtonline.info/index.php/jddt/article/view/7878
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