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Rift Valley fever virus: a serological survey in Libyan ruminants

Abdusalam Sharef Mahmoud, Daria Di Sabatino, Maria Luisa Danzetta, Federica Iapaolo, Francesco Tolari, Mario Forzan, Maurizio Mazzei, Abdunaser Dayhum, Fabrizio De Massis, Federica Monaco


A serological survey was carried out in Libya to investigate the circulation of Rift Valley fever virus (RVFV) among domestic ruminants. A total of 857 serum samples were collected from year 2015 to 2016 in eleven provinces of Libya belonging to five branches of the country. Samples were tested for RVFV antibodies using a competitive Enzyme-Linked Immunosorbent Assay (c-ELISA). Antibodies specific for RVFV were not detected in any of the 857 samples. However, a statistical analysis was carried out to assess the maximum expected number of infected animals and the maximum expected prevalence of RVFV among Libyan ruminants’ populations according to the sampled population. The overall maximum expected prevalence was estimated to be 1.8% for cattle and 0.4% for small ruminants. Results seem to exclude the circulation of RVFV, however, a surveillance plan should be implemented in areas at risk of RVFV introduction.

Keywords: c-ELISA, Libya, RVF, Sero-prevalence
AJOL African Journals Online