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The emergence of subclades A1 and A3 avipoxviruses in India
Author(s) -
Sahu Basanta Pravas,
Majee Prativa,
Mishra Chinmayee,
Dash Manojita,
Biswal Sangram,
Sahoo Niranjan,
Nayak Debasis
Publication year - 2020
Publication title -
transboundary and emerging diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.392
H-Index - 63
eISSN - 1865-1682
pISSN - 1865-1674
DOI - 10.1111/tbed.13413
Subject(s) - subclade , clade , biology , phylogenetic tree , gene , polymerase chain reaction , outbreak , virology , veterinary medicine , genetics , medicine
During the years 2010–2018, avipoxvirus (APV) outbreaks were observed in the domestic chickens and pigeons present in the eastern Indian state of Odisha. Based on typical pox lesions, followed by molecular techniques, the overall morbidity was found to be 18%–19.23% and 16.92%–23% in chickens and pigeons, respectively. The cutaneous forms of the disease were observed with varied rates of mortality, being 47.36%–52.77% in chickens and 39.13%–92% in pigeons. PCR amplification targeting the viral P4b core protein‐coding gene and the DNA polymerase gene confirmed the presence of APV strains in 10 birds. Subsequent phylogenetic analysis of these two genes confirmed that the circulating strains were members of APV clade A. The subclade analysis revealed the introduction of A1 and A3 subclades in Indian chickens and pigeons, respectively. This study is the first molecular record of APVs circulating in eastern Indian birds (Odisha) and involves the first use of the polymerase gene to reveal the circulating clades of Indian APVs.