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article · Veterinary Medicine and Science

Survey of Rift Valley Fever Virus Antibodies and Risk Factors in Small Ruminants in Maiduguri, Borno State, Nigeria: A Cross‐Sectional Serological Study

In plain language

Rift Valley fever is a mosquito-borne viral infection affecting livestock trade and productivity, as well as human health. A cross-sectional investigation assessed the presence of antibodies against the virus and evaluated related risk factors among small ruminants in Maiduguri, Borno State, Nigeria. Ninety-six blood samples were collected alongside animal data and local flooding history. Testing with a commercial competitive multispecies ELISA kit revealed an overall antibody seroprevalence of 47.9 percent across the sampled population. Sheep had a higher seroprevalence than goats, with elevated rates also observed in female animals, young livestock, and animals located in flooded areas. Age, sex, and proximity to flood-prone zones were confirmed as statistically significant risk factors, demonstrating widespread prior exposure to the virus among small ruminants in this urban area.

Key takeaways

  • Overall Rift Valley fever virus antibody seroprevalence was 47.9 percent among small ruminants in Maiduguri.
  • Sheep showed a higher antibody prevalence at 52.1 percent compared to 43.8 percent in goats.
  • Animal age, female sex, and proximity to flood-prone areas were identified as significant risk factors for exposure.

Why it matters

Rift Valley fever causes severe livestock losses, such as abortions and deaths in young animals, and can transmit to humans. Identifying that nearly half of sampled sheep and goats show signs of exposure helps veterinary authorities understand local transmission dynamics and highlights the heightened risk associated with flood-prone urban environments.

Commercialisation angle

The findings provide baseline epidemiological data that can guide veterinary health agencies and livestock programme managers in targeting surveillance and vector control interventions. Because the study relies on standard diagnostic testing to report seroprevalence rather than developing a new product, the abstract does not indicate a direct commercialisation pathway or commercial product readiness level.

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Abstract

BACKGROUND: Rift Valley fever (RVF) is a zoonotic viral disease transmitted through mosquito bites commonly reported in low- to medium-income countries such as Nigeria. It impacts livestock productivity and trade, causing abortions and high rates of mortality, particularly among young animals. OBJECTIVES: A cross-sectional study was aimed to determine the presence of RVF virus antibodies (anti-RVFV IgG antibodies) and to identify related risk factors in small ruminants within Maiduguri Metropolis, Borno State, Nigeria. METHODS: Ninety-six blood samples were collected; information on species, age and sex of the animals was recorded; history of flooding was assessed based on farmer report and observation. The study used a commercial ELISA kit (competitive, multispecies) to identify the presence of RVF virus antibodies, in accordance with the manufacturer's guidelines. RESULTS: This study established an overall seroprevalence of RVFV antibodies of 47.9% (95% confidence interval [CI]: 37.9-57.9) in small ruminants. The prevalence rate for sheep was higher (52.1%) compared to goats (43.8%). Females (68.6%), young animals (51.2%) and places flooded (68.3%) showed a higher seroprevalence. The findings indicate that age (OR: 2.4; 95% CI: 1.1-5.2), sex (OR:2.8; 95% CI: 1.2-6.2) and proximity to flood-prone areas (OR: 2.1; 95% CI: 1.0-4.3) were significant (p ≤ 0.05) risk factors for the RVF virus. CONCLUSION: The studies indicate previous exposure and potential epidemiological role of small ruminants in RVF virus transmission in Maiduguri Metropolis. It is recommended that regular monitoring and effective surveillance be carried out; mosquito vector populations be regulated during flooding or rainy seasons and the public be informed about the disease's impact on humans, livestock and the economy.

Research topics

  • Viral Infections and Vectors
  • Viral Infections and Outbreaks Research
  • Vector-Borne Animal Diseases

Sustainable Development Goals

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DOI: 10.1002/vms3.71009

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