Alt solunum yolu enfeksiyonu olan köpeklerde canine coronavirusun tespiti ve moleküler karakterizasyonu

Year 2022, Volume: 93 Issue: 2, 124 - 132, 15.06.2022

Fırat Doğan Serkan İrfan Köse

https://doi.org/10.33188/vetheder.1094617

Cited By: 1

Abstract

Coronaviridae familyasında yer alan coronaviruslar insan ve hayvanlarda sindirim ve solunum sistemi enfeksiyonlarına neden olmaktadır. Alfacoronavirus içerisinde yer alan canine coronaviruslar (CCoV)’ın CCoV I ve CCoV II olmak üzere iki alt tipi bulunmaktadır. CCoV-II ise CCoV- IIa ve IIb olmak üzere iki genotipe ayrılmaktadır. CCoV her yaştaki ve her türlü beslenme şekline sahip köpekleri etkilemesine rağmen özellikle yeni doğan yavrular daha duyarlı ve ciddi şekilde etkilenebilmektedir. Yapılan literatür araştırmalarına göre ülkemizde özellikle alt solunum yolu enfeksiyonlarındaki canine coronavirus varlığının tespitine yönelik moleküler çalışmalara rastlanılmamıştır. Bu çalışmada alt solunum yolu enfeksiyonu tanımlanan barınak köpeklerinde CCoV’un tespiti ve moleküler karakterizasyonunun yapılması amaçlandı. Bu amaçla alt solunum yolu enfeksiyonu tespit edilen 40 adet barınak köpeğinden alınan Bronkoalveolar Lavaj (BAL) sıvıları incelendi. Test edilen 40 köpeğe ait BAL sıvılarından 3 tanesinde CCoV tespit edildi. Yapılan dizin analizi sonrasında elde edilen dizinler ile filogenetik ağaç yapıldı. Filogenetik ağaçta pozitif bulunan 3 örnekten 2 sinin CCoV-I, bir örneğin ise CCoV-II olduğu tespit edildi. Sonuç olarak bu çalışma ile barınak köpeklerinin alt solunum yolu rahatsızlıklarında CCoV-I ve CCoV-II’ nin rol oynayabileceği ortaya konulmuştur. Ayrıca aynı barınakta farklı hayvanlarda iki farklı CCoV’nun tespiti önemli bir veri olarak değerlendirilmiş olup özellikle barınak koşulları gibi kalabalık ortamda barındırılan köpeklerdeki her iki tipin tespiti gelecekte oluşabilecek yeni varyantların ya da alt tiplerin oluşabilme ihtimalinin de göz ardı edilmemesi gerektiğini göstermektedir.

Keywords

Coronavirus, Köpek, PCR, Alt solunum sistemi enfeksiyonu

Detection and molecular characterization of canine coronavirus in dogs with lower respiratory tract infection

Abstract

Coronaviruses in the family Coronaviridae cause digestive and respiratory system infections in humans and animals. There are two subtypes of canine coronaviruses (CCoV), which are included in the alfacoronavirus, as CCoV I and CCoV II. CCoV-II is divided into two genotypes, CCoV-IIa and IIb. Although CCoV affects dogs of all ages and all diets, newborn puppies can be particularly susceptible and severely affected. According to the literature research, no molecular studies have been found in our country for the detection of canine coronavirus, especially in lower respiratory tract infections. In this study, it was aimed to detect and molecular characterization of CCoV un shelter dogs with lower respiratory tract infection. For this purpose, Bronchoalveolar Lavage (BAL) fluids taken from 40 shelter dogs with lower respiratory tract infections were examined. CCoV was detected in 3 of the BAL fluids of 40 dogs tested. A phylogenetic tree was constructed with the sequences obtained after the sequence analysis. It was determined that 2 of the 3 positive samples in the phylogenetic tree were CCoV-I and one sample was CCoV-II. In conclusion, this study revealed that CCoV-I and CCoV-II may play a role in lower respiratory system disorders of shelter dogs. In addition, the detection of two different CCoVs in different animals in the same shelter has been considered as an important data, and the detection of both types in dogs housed in crowded environments such as shelter conditions shows that the possibility of new variants or subtypes that may occur in the future should not be ignored.

Keywords

Coronavirus, Canine, PCR, Lower respiratory tract infection

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