id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-022187-7c3wz6c6	Liu, Shengwang	A new genotype of nephropathogenic infectious bronchitis virus circulating in vaccinated and non-vaccinated flocks in China	2010-10-19		.txt	text/plain	3520	195	60	title: A new genotype of nephropathogenic infectious bronchitis virus circulating in vaccinated and non-vaccinated flocks in China Five strains of infectious bronchitis virus (IBV) were isolated from five layer flocks that had nephropathogenic infection in four provinces in China. Virulence studies indicated that the five Chinese IBV isolates caused 10 to 30% mortality in 15-day-old specific pathogen free chickens and gross lesions were mainly confined to the kidneys in all of the dead chickens. In order to investigate whether there are other genotype(s) of nephropathogenic IBV besides the Massachusetts type in flocks in China, we tested five IBV isolates from layer flocks showing clinical signs of IB by sequencing and analysis of the S1 protein genes. In the present study, we isolated three IBV strains from H120-vaccinated flocks and two from non-vaccinated flocks of layer chickens that experienced nephropathogenic infection in four provinces of north China.	./cache/cord-022187-7c3wz6c6.txt	./txt/cord-022187-7c3wz6c6.txt