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1 in 6 dromedary camels in Africa carries Rift Valley Fever antibodiesSeroprevalence of Rift Valley Fever in African camels varies widely by country

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Key Takeaway
Consider that nearly 1 in 6 dromedary camels in Africa may have been exposed to RVF, with wide regional variation.

This systematic review and meta-analysis pooled data from 7444 dromedary camels across 11 African countries to estimate the seroprevalence of Rift Valley Fever (RVF). The overall pooled seroprevalence was 17.25% (95% CI: 11.82-23.43%), with substantial variation by country. For instance, seroprevalence was 73.4% in Somalia, 36.6% in Niger, and 32.2% in Mauritania.

Significant differences were observed between countries and age groups (p < 0.0001), with adult camels exhibiting higher rates than younger animals. No significant differences were found with respect to sex, health status, origin, sample size, or diagnostic method.

The authors note a limitation: the analysis is based on a limited number of studies focusing on camels. The findings provide critical insights for public and animal health authorities to develop evidence-based RVF control strategies, including vaccination, vector management, and movement control. However, the observational nature of the included studies precludes causal conclusions, and the pooled estimate should be interpreted with caution given the high heterogeneity across regions.

This systematic review and meta-analysis examined seroprevalence data for Rift Valley Fever in dromedary camels. Researchers pooled results from studies conducted across 11 African countries to understand how common the infection is in this population. The analysis included a total of 7,444 camels.

The study found that the overall pooled seroprevalence was 17.25%. However, infection rates varied greatly depending on the specific country. Somalia showed the highest rate at 73.4%, while Niger and Mauritania had rates of 36.6% and 32.2% respectively. Adult camels exhibited higher infection rates than younger animals.

The researchers noted significant differences between countries and age groups. They found no significant differences based on sex, health status, origin, sample size, or diagnostic method. The authors state that these findings provide critical insights for public and animal health authorities to develop evidence-based control strategies. These strategies may include vaccination, vector management, and movement control.

A limitation of this analysis is the limited number of studies focusing specifically on camels. Because this is a meta-analysis of existing data, it does not report on safety concerns or adverse events. Readers should understand that these results describe infection prevalence and do not prove that one factor caused another.

What this means for you:
Infection rates in African camels vary significantly by country, with adults showing higher prevalence than younger animals.

Study Details

Study typeMeta analysis
EvidenceLevel 1
PublishedJun 2026
View Original Abstract ↓
Rift Valley Fever (RVF) is a viral, mosquito-borne disease affecting livestock, including camels, and humans. The virus, belonging to the genus Phlebovirus, is primarily transmitted by mosquitoes of the genera Aedes and Culex, which act as both reservoirs and vectors, facilitating viral spread during outbreaks. This systematic review and meta-analysis aimed to provide a comprehensive synthesis of RVF epidemiology in camels across Africa from 1977 to 2025, estimate the true seroprevalence, and assess potential risk factors associated with infection. Following PRISMA guidelines, an exhaustive search of PubMed, Google Scholar, ResearchGate, and ScienceDirect was conducted. A total of 34 eligible studies, encompassing 7444 camels from 11 African countries, were included. The overall pooled seroprevalence was 17.25% (1316/7444; 95% CI: 11.82-23.43%), with the highest rates reported in Somalia (73.4%), Niger (36.6%), and Mauritania (32.2%). Seroprevalence differed significantly between countries and age groups (p < 0.0001), with adult camels exhibiting higher rates than younger animals. No significant differences were observed with respect to sex, health status, origin, sample size, or diagnostic method. Temporal analyses revealed fluctuating prevalence over decades, reflecting periodic epizootics and vector activity. Despite the limited number of studies focusing on camels, these findings provide critical insights for public and animal health authorities to develop evidence-based RVF control strategies, including vaccination, vector management, and movement control. Further entomo-epidemiological studies are strongly recommended to enhance understanding of RVF transmission dynamics and support targeted surveillance. This review highlights the role of camels as sentinel species for RVF circulation in Africa and underscores the need for integrated One Health approaches to mitigate both animal and human infection risks.
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