detection of the chinese genotype of infectious bronchitis virus (qx-type) in iran

نویسندگان

mh bozorgmehri-fard department of clinical science, faculty of veterinary medicine, islamic azad university, science and research branch, tehran, iran

s charkhkar department of clinical science, faculty of veterinary medicine, islamic azad university, science and research branch, tehran, iran

h hosseini department of clinical sciences, faculty of veterinary medicine, islamic azad university, karaj branch, karaj, iran

چکیده

case report: recently a 20-day-old layer flock with mortality has been submitted to the pcr lab. infectious bronchitis virus (ibv) has been detected in the clinical samples. results: a phylogenetic tree based on a partial s1 gene sequence showed iranian ibv variant located in lx4-type cluster. this cluster include all qxibv-type detected in china and european countries. the highest sequence homology (> 99%) was found with that of a group of the chinese qx but less similarity with european qx-like (>95%) and another chinese qxibv (>94%). conclusion: comparison of nucleotides sequence with h120 and 4/91 ib vaccines shows only 76.9 and 79.7 identity, respectively.

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عنوان ژورنال:
iranian journal of virology

جلد ۷، شماره ۱، صفحات ۵۷-۶۰

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