Khalil BADIEI, Mahsa FARZINPOUR, Karim ZARE, Mohsen GHANE, Mehrdad POURJAFAR

Antibody Tracing, Seroepidemiology and Risk Factors of Bovine Respiratory Syncytial Virus and Bovine Adenovirus-3 in Dairy Holstein Farms

Endüstriyel ve yarı-endüstriyel 22 sütçü Siyah Alaca işletmesinde sığır respiratuvar sinsityal virüsü ve sığır adenovirus-3ün antikor izleri, risk faktörleri ve seroepidemiyolojisi araştırılmıştır. Çeşitli yaşlardaki aşılanmamış ineklerden Mayıs 2012 ile Eylül 2012 arasında serum örnekleri (n=736) toplanmıştır. Yaş, solunum hastalıklarıyla ilgili geçmişteki kayıtlar, süt üretim miktarı, işletme tipi ve sürü boyutunu içeren risk faktörleri dikkate alınmıştır. Veriler Ki-kare ve lojistik regresyon kullanılarak analiz edilmiştir. Elde edilen sonuçlar bazı bireysel virüslerle oluşan enfeksiyonların geçmişteki solunum hastalığına ve sürü boyutuna bağlı olduğunu gösterdi. Hayvanların seropozitiviteleri üzerinde süt üretim düzeyi etkisinin belirgin bir paterninin olmadığı görüldü. BRSV ve BAV-3 için seroprevalans sırasıyla %89,1 ve %88di. Bu çalışma, sığır respiratuvar virüsleri enfeksiyonlarının Fars bölgesinde sıklıkla oluştuğunu ve solunum hastalıklarının primer oluşumunun başlıca viral sebebinin daha önce bahsedilen virüsler olduğunu göstermektedir.

Özet Sütçü Siyah Alaca İşletmelerinde Sığır Respiratuvar Sinsityal Virüsü ve Sığır Adenovirüs-3 ün Antikor İzleri, Seroepidemiyolojisi ve Risk Faktörleri

Antibody tracing, risk factors and seroepidemiology of bovine respiratory syncytial virus and bovine adenovirus-3 were investigated in 22 Industrial and Semi-Industrial dairy Holstein farms. Serum samples (n=736) from various ages of unvaccinated cows were collected from May to September 2012. Risk factors including age, past history of respiratory diseases, amount of milk production, husbandry type and herd size were considered. Data were analyzed by Chi-square and logistic regression. Results indicated that the infection with some of individual viruses was related to past history of respiratory disease and herd size. No specific pattern was seen on the effect of level of milk production on seropositivity of animals. The seroprevalence for BRSV and BAV-3 were 89.1% and 88%, respectively. The present study indicates that infections of bovine respiratory viruses frequently occur in cattle of Fars province and the main viral cause of primary occurrence of respiratory diseases may be due to aforementioned viruses.

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