Seroprevalence of avian reovirus infections in chickens in western provinces of Turkey

Bu çalışmada, Aydın, İzmir ve Manisa illerindeki damızlık ve broiler yetiştiren tavukçuluk işletmelerinde Avian Reovirus (ARV) enfeksiyonunun seroprevalansı araştırıldı. Ticari Enzyme Linked Immunosorbent Assay (ELISA) kullanılarak, 18 broiler ve 8 broiler damızlık kümesine ait tavuklardan alınan toplam 631 serum örneği ARV antikorları yönünden test edildi. Kan örnekleri tavukların kesimi esnasında alındı. Örneklenen sürüler ARV enfeksiyonuna karşı aşısızdı. Bütün kümeslerde ARV antikorları bulunmuş olup, broiler kümeslerinden toplanan 295 örneğin 224’ü (%75.93) ve damızlık broiler kümeslerinden toplanan 336 örneğin 322’si (%95.83) seropozitif olarak saptandı. Test edilen toplam 631 serum örneğinden 546’sı (%86.53) pozitif olarak kaydedildi. Örnekleme esnasında, damızlık sürülerde solunum ve topallık belirtilerine rastlanmazken, broiler kümeslerinin tamamında bu problemler dikkati çekmekteydi. Seropozitiflik oranlarının İzmir ilinde (%91.48), Manisa ve Aydın illerine nazaran daha yüksek olduğu tespit edildi (sırasıyla %74.59 ve %70.58). Sonuç olarak, broiler yetiştiriciliğinde önemli solunum sistemi semptomlarına, topallığa ve verim düşüklüklerine yol açan reovirusların Ege Bölgesi’nde çok yaygın olduğu görüldü. Özellikle damızlık sürülerde enfeksiyonun yüksek prevalansa sahip olduğu ve çoğu zaman semptom göstermeksizin, gizli bir şekilde devam ettiği belirlendi. Bu araştırmanın sonuçlarına dayanarak, söz konusu virus enfeksiyonuna karşı düzenli mücadele programlarının hazırlanması ve uygulanması gerektiği sonucuna varıldı.

Anahtar Kelimeler:

viral hastalıklar, hayvan patolojisi, avian reovirus, etlik piliç, klinik görünüm, hastalık yaygınlığı, hastalık tetkiki, epidemiyolojik araştırmalar, epidemiyoloji, tavuk, topallık, kümes hayvanları, seroprevalans

Türkiye’nin batı illerindeki tavukçuluk işletmelerinde avian reovirus enfeksiyonunun seroprevalansı

In this study, seroprevalence of avian reovirus (ARV) infections in broiler and broiler breeder chicken farms in Aydin, İzmir and Manisa provinces were investigated. Serum samples (n = 631) collected from 8 broiler breeder and 18 broiler flocks were tested for ARV antibodies using a commercially available ARV Enzyme Linked Immunosorbent Assay (ELISA) kit. The sampled flocks were not vaccinated against ARV. The blood samples were taken at the time of slaughtering. Antibodies were found in all flocks tested; 224 of the 295 samples (75.93%) collected from broiler and 322 of the 336 samples (95.83%) collected from the broiler breeder chickens were seropositive. In total, 546 of the 631 serum samples (86.53%) were seropositive. Lameness and respiratory system disorders were observed in all of the broiler flocks but none of the broiler breeder flocks. Seropositivity in Izmir province (91.48%) was higher than seropositivity in Manisa and Aydin provinces (74.59 and 70.58%, respectively). These results suggest that ARV infections which may cause lameness, serious respiratory system disorders, and decreased productivity in broilers are very common in chickens in the Aegian region of Turkey. The infection is often subclinical in broiler breeders. These results highlight the need for regular implementation of programs to combat the ARV infection in western Turkey.

Keywords:

viral diseases, animal pathology, avian reovirus, broilers, clinical aspects, disease prevalence, disease surveys, epidemiological surveys, epidemiology, fowls, lameness, poultry, seroprevalence,

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