Abstract
Orf is a contagious, viral epitheliotropic disease of small ruminants. We investigated the molecular epidemiology of orf virus (ORFV) in breeds of small ruminants to determine the evolutionary diversity in Nigeria. Out of 54 small ruminants screened, the number of animals that were positive for ORFV in the three locations were 25. The distribution of positive animals by location were FCT 45.0% (n = 9/20), Oyo State 42.9% (6/14), and Plateau State 50.0% (n = 10/20). ORFV sequences from this study clustered with viruses detected in Taiwan, Iran, USA, and France. Our findings highlight the risk of transmission across geographic boundaries in Nigeria and West Africa, and reinforces the need for increased surveillance to prevent and control spread. Comprehensive characterization of ORFV in small ruminants as well as in humans in Nigeria is required to better elucidate the epidemiological dynamics and the virus evolution.
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