Epidemiological characteristics and clinicopathological features of bluetongue in sheep and cattle, during the 2014 BTV serotype 4 incursion in Greece

Autor: Serafeim C. Chaintoutis, Stéphan Zientara, I. Vlemmas, Theologos Papadopoulos, Chrysostomos I. Dovas, Constantinos Boscos, Nektarios D. Giadinis, Georgios Tsousis, V. Psychas, Harilaos Karatzias, Panagiotis-Dimitrios Katsoulos, Evangelos Kiossis, O. Papadopoulos
Přispěvatelé: Aristotle University of Thessaloniki, Virologie UMR1161 (VIRO), Institut National de la Recherche Agronomique (INRA)-Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail (ANSES)-École nationale vétérinaire d'Alfort (ENVA), Alexander S. Onassis Public Benefit Foundation
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Zdroj: Tropical Animal Health and Production
Tropical Animal Health and Production, Springer Verlag (Germany), 2016, 48 (3), pp.469-477. ⟨10.1007/s11250-015-0974-5⟩
ISSN: 0049-4747
1573-7438
DOI: 10.1007/s11250-015-0974-5⟩
Popis: International audience; During 2014, an outbreak of Bluetongue virus (BTV) infections attributed to serotype 4 occurred in Greece and spread to south-eastern Europe. In the present article, the clinical and epidemiological data of 15 sheep flocks and 5 dairy cattle herds affected in Greece are described. In sheep, the most frequent clinical signs observed were fever, hyporexia, and edema of the face. A number of clinically affected sheep had chronic laminitis resulting in chronic lameness. Confirmation of suspect clinical cases was performed using BTV-specific real-time RT-PCR, and serotype 4-specific RT-PCR. The average morbidity of bluetongue in the sheep flocks was estimated to be 15.3 % (95 % C.I. 6.8-23.8 %) and the average mortality and case fatality were 4.5 % (95 % C.I. 1.5-7.6 %) and 32.0 % (95 % C.I. 18.1-42.9 %), respectively. The BTV seroprevalence and the ratio of clinical manifestations-to-infections determined in seven of these flocks, were on average 36.5 % (95 % C.I. 15.7-57.3 %) and 24.6 % (95 % C.I. 12.8-36.3 %). BTV ratio of clinical manifestations-to-infections was higher in the imported western European sheep breeds examined compared to the local ones. In dairy cattle, the average herd prevalence of viremia was 48.8 % (95 % C.I. 15.3-82.4 %) and none had signs associated with bluetongue. The results of this study indicate that the 2014 Greek BTV-4 has significant impact on the health status and the viability of sheep in affected flocks but does not cause clinical signs in cattle, despite the high prevalence of viremia.
Databáze: OpenAIRE
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