Viruses, Vol. 11, Pages 1047: Comparative Pathogenicity and Transmissibility of the H7N9 Highly Pathogenic Avian Influenza Virus and the H7N9 Low Pathogenic Avian Influenza Virus in Chickens
Viruses, Vol. 11, Pages 1047: Comparative Pathogenicity and Transmissibility of the H7N9 Highly Pathogenic Avian Influenza Virus and the H7N9 Low Pathogenic Avian Influenza Virus in Chickens
Viruses doi: 10.3390/v11111047
Authors:
Hao Yu
Kunpeng Zhang
Xumeng Ye
Wenqing Wang
Wenbo Wu
Xia Wang
Yun Guan
Zhuoliang He
Yong Wang
Peirong Jiao
There were five outbreaks of H7N9 influenza virus in humans in China since it emerged in 2013, infecting >1000 people. The H7N9 low pathogenic influenza virus was inserted into four amino acids in the HA protein cleavage site to mutate into the H7N9 highly pathogenic virus. This emerging virus caused 15 outbreaks in chickens from the end of 2016 to date. Two H7N9 avian influenza virus (AIV) strains, A/chicken/Guangdong/A46/2013 (LPAIV) and A/chicken/Guangdong/Q29/2017 (HPAIV), were selected to compare the pathogenicity and transmissibility between H7N9 LPAIVs and HPAIVs in chickens. We inoculated 3- to 4-week-old specific-pathogen-free (SPF) chickens with 6 log10EID50/0.1 mL viruses via the ocular-nasal route and co-housed four chickens in each group. The inoculated chicken mortality rate in the A46 and Q29 groups was 1/5 and 5/5, respectively. Q29 virus replication was more efficient compared to the A46 virus in inoculated chickens. Infected chickens initiated viral shedding to naïve contact chickens through respiratory and digestive routes. Both viruses transmitted between chickens by na&a...
Source: Viruses - Category: Virology Authors: Hao Yu Kunpeng Zhang Xumeng Ye Wenqing Wang Wenbo Wu Xia Wang Yun Guan Zhuoliang He Yong Wang Peirong Jiao Tags: Article Source Type: research