Risk based serological survey of Rift Valley fever in Tunisia (2017–2018)

Kalthoum Sana, Arsevska Elena, Guesmi Kaouther, Mamlouk Aymen, Cherni Jamel, Lachtar Monia, Gharbi Raja, Mohamed Bassem Bel Haj, Khalfaoui Wiem, Dhaouadi Anissa, Baccar Mohamed Naceur, Hajlaoui Haikel, Mzoughi Samia, Seghaier Chédia, Messadi Lilia, Zrelli Malek, Sghaier Soufien, Cetre-Sossah Catherine, Hendrikx Pascal, Squarzoni Cécile. 2021. Risk based serological survey of Rift Valley fever in Tunisia (2017–2018). Heliyon, 7 (9):e07932, 6 p.

https://doi.org/10.1016/j.heliyon.2021.e07932

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Quartile : Q2, Sujet : MULTIDISCIPLINARY SCIENCES

Résumé : Rift Valley fever (RVF) has been reported in the sub-Saharan region of Africa, Egypt and Arabian Peninsula - Yemen and Saudi Arabia, over the past 20 years and is a threat to both the animal and human populations in Tunisia. Tunisia is considered as a high-risk country for the introduction of RVF due to the informal movements of diseased animals already reported in the neighboring countries. The objective of this study was to assess the status of RVF in small ruminants and camels in Tunisia. A risk-based serological survey was conducted to evaluate the presence of RVF based on spatial qualitative risk analysis (SQRA). Samples were collected from small ruminants (sheep and goats) (n = 1,114), and camels (n = 173) samples, belonging to 18 breeders in 14 governorates between November 2017 and January 2018. Samples were tested using an RVF specific multispecies competitive ELISA. Out of the 1,287 samples tested for the presence of RVF IgG antibodies by ELISA, only one positive sample 0.07% (1/1 287) was detected but not confirmed with the virus neutralization test (VNT) used for confirmation. So far, no RVF outbreaks have been reported in Tunisia and our study confirmed the absence of RVF in livestock up to January 2018. Further investigations are needed to confirm the RVF-free status of Tunisia today.

Mots-clés Agrovoc : surveillance épidémiologique, fièvre de la Vallée du Rift, sérologie, ruminant, épidémiologie, analyse du risque, petits ruminants, distribution géographique, facteur de risque, Enquête pathologique, dromadaire