Ismet KALKANOV, Ivan DINEV, Marin ALEKSANDROV, Kiril DIMITROV, Ivan ZARKOV

Morphological and Etiological Investigations in A Rotaviral Enteritis Outbreak in Calves

Bu çalışmanın amacı buzağılarda 24. saat ile 20. gün arasında şekillenen diare sendromu salgınında makroskobik ve histopatolojik bulguların tanımlanarak etiyolojinin araştırılmasıdır. Klinik olarak hasta hayvanlarda mukus ve kan ile karışık sarı yeşilimtırak renkli dışkı ile karakterize şiddetli ishal gözlemlendi. Hızlı saha testi, Rainbow calf scour 5 BIO K 306, dışkıda Rotavirus, Coronavirus, E. coli F5, Cryptosporidium parvum ve Clostridium perfringens antijenlerini belirlemek amacıyla kullanıldı. Testin sonuçları Grup A bovine rotavirus için pozitif ve diğer tüm etkenler için negatif olarak belirlendi. Gastrointestinal system organlarda gözlemlenen patolojik değişiklikler yangısal karakterdeydi. Mikroskobik bakıda intersitisyel dokuda ve submukozada şiddetli lenfositik infiltrasyon ve ödem ile karakterize kataral deskuamatöz enterokolitis tespit edildi. Komplike olmayan rotavirus enteritis gastrointestinal sistemde patolojik değişiklikler yapabilme ve yüksek mortalite özelliklerine sahip olabilmektedir.

Buzağılarda Gözlenen Bir Rotavirus Enteritis Salgınında Morfolojik ve Etiyolojik Araştırmalar

The aim of the present report was to describe the gross pathology and histopathologic findings and etiological investigations in a diarrhoeic syndrome outbreak in calves from the 24th h to 20th day of life. Clinically, affected animals exhibited profuse diarrhoea with yellow-greenish faeces mixed with mucus and blood. Rapid field tests Rainbow calf scour 5 BIO K 306 Detection of Rotavirus, Coronavirus, E. coli F5, Cryptosporidium parvum and Clostridium perfringens in bovine stool and ELISA was used for detection of Rotavirus, Coronavirus, E. coli F5, Cryptosporidium parvum antigens. The results of tests were positive for Group A bovine rotavirus, and negative for all other tested etiological agents. The gastrointestinal tract macroscopic lesions observed during the gross pathological examination were of inflammatory nature. Microscopic lesions confirmed the catarrhal desquamative enterocolitis through marked lymphocytic infiltration and oedema of intersitial tissues and submucosa. Non-complicated rotaviral enteritis was capable of inducing pathological alterations of the gastrointestinal tract in neonatal calves with high mortality rates.

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