The first serological detection and risk factors analysis of Rift Valley fever virus in sheep and goats in Fars province, southern Iran

Rift Valley fever is a vector-borne zoonosis that can affect various species, including ruminants and camels. The present study reports the first serological detection of the Rift Valley fever virus in sheep and goats, along with an analysis of risk factors in Fars province, located in the south of Iran. The province of Fars was distributed into three climate zones, and three cities were accidentally chosen for each climatic zone. Two epidemiologic units were selected in each city, and samples of all the sheep and goats were collected from each unit. In total, ۵۴۰ serum samples (۳۹۱ from sheep and ۱۴۹ from goats) were gathered and tested by a commercial ELISA kit. Out of ۵۴۰ samples tested, ۱۲ (۲.۲%) were found to be seropositive for the Rift Valley fever virus, with ۱۰ from sheep and ۲ from goats, indicating the presence of specific antibodies.  The correlation between seropositivity and risk factors such as age, sex, climate, animal type, and, history of abortion was not significant. In conclusion, the Rift Valley fever virus is not endemic in Fars province. Further studies are recommended to investigate the distribution of mosquito vectors and their genotype in Fars province, isolate the virus, and develop vaccines.

Keywords:

Abortion , Rift Valley fever , Seroprevalence , Fars province , Zoonotic