scholarly journals Global concern regarding the fifth epidemic of human infection with avian influenza A (H7N9) virus in China

2017 ◽  
Vol 11 (1) ◽  
pp. 120-121 ◽  
Author(s):  
Yinzhong Shen ◽  
Hongzhou Lu
Keyword(s):  
Avian Influenza ◽  
Influenza A ◽  
Human Infection ◽  
H7n9 Virus ◽  
Global Concern

ANALYSIS OF AVIAN INFLUENZA A (H7N9) MODEL BASED ON THE LOW PATHOGENICITY IN POULTRY

2017 ◽  
Vol 25 (02) ◽  
pp. 279-294 ◽  
Author(s):  
SHU-MIN GUO ◽  
JUAN WANG ◽  
MINI GHOSH ◽  
XUE-ZHI LI
Keyword(s):  
Avian Influenza ◽  
Equilibrium Point ◽  
High Mortality ◽  
Influenza A ◽  
Influenza Viruses ◽  
H7n9 Virus ◽  
Global Concern ◽  
Reported Data ◽  
High Pathogenic ◽  
Stability Results

The avian influenza A (H7N9) virus is one subtype of influenza viruses, which has previously been isolated only in birds. Recently, an outbreak of a new avian influenza (H7N9) in China has resulted in numerous infections and high mortality in the humans. The H7N9 virus is low pathogenic in poultry and high pathogenic in human and that is critically different from other avian influenza viruses. An increasing number of the new H7N9 cases and the high mortality have caused a serious global concern. Here, based on the reported data, we propose and analyze an SE-SEIS avian–human influenza model. We prove the global stability results for both the disease-free equilibrium point and the endemic equilibrium point by using a general Bendixson–Dulac theorem. Our reported theoretical results of this paper are expected to help in exploring the development of efficient methods to controlling the spread of avian influenza A(H7N9).

scholarly journals Emergence of human avian influenza A(H7N9) virus infections in Wenshan City in Southwest China, 2017

2019 ◽  
Author(s):  
Li Jiang ◽  
Xiaonan Zhao ◽  
Wen Xu ◽  
Xuehua Zhou ◽  
Chunrui Luo ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
Avian Influenza ◽  
Influenza A ◽  
Human Infection ◽  
Viral Gene ◽  
H7n9 Virus ◽  
Genetic Sequencing ◽  
Live Poultry ◽  
Virus Spreading ◽  
Live Poultry Markets

Abstract Background: The emergence of human infection with avian influenza A(H7N9) virus was reported in Wenshan City, southwestern China in 2017. The study describes the epidemiological and virological features of the outbreak and discusses the origin of the infection. Methods: Poultry exposure and timelines of key events for each patient were collected. Samples derived from the patients, their close contacts, and environments were tested for influenza A(H7N9) virus by real-time reverse transcription polymerase chain reaction. Genetic sequencing and phylogenetic analysis were also conducted. Results: Five patients were reported in the outbreak. An epidemiological investigation showed that all patients had been exposed at live poultry markets. Virus isolates from these patients had low pathogenicity in avian species. Both epidemiological investigations of chicken sources and phylogenetic analysis of viral gene sequences indicated that the source of infection was from Guangxi Province. Conclusions: The transmission route spanned a long geographical region, with virus spreading from east to west. Chickens were an important carrier in the H7N9 virus spreading from Guangxi to Wenshan. Hygienic management of live poultry markets and virological screening of chickens transported across regions should be reinforced to limit the spread of H7N9 virus.

scholarly journals Epidemiologic characterization of 30 confirmed cases of human infection with avian influenza A(H7N9) virus in Hangzhou, China

2014 ◽  
Vol 14 (1) ◽  
Author(s):  
Hua Ding ◽  
Li Xie ◽  
Zhou Sun ◽  
Qing-Jun Kao ◽  
Ren-Jie Huang ◽  
...  
Keyword(s):  
Avian Influenza ◽  
Influenza A ◽  
Human Infection ◽  
H7n9 Virus

scholarly journals Emergence of human avian influenza A(H7N9) virus infections in Wenshan City in Southwest China, 2017

2020 ◽  
Author(s):  
Li Jiang ◽  
Xiaonan Zhao ◽  
Wen Xu ◽  
Xuehua Zhou ◽  
Chunrui Luo ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
Avian Influenza ◽  
Influenza A ◽  
Human Infection ◽  
Viral Gene ◽  
H7n9 Virus ◽  
Virus Infections ◽  
Genetic Sequencing ◽  
Live Poultry ◽  
Live Poultry Markets

Abstract Background: The emergence of human infection with avian influenza A(H7N9) virus was reported in Wenshan City, southwestern China in 2017. The study describes the epidemiological and virological features of the outbreak and discusses the origin of the infection. Methods: Poultry exposure and timelines of key events for each patient were collected. Samples derived from the patients, their close contacts, and environments were tested for influenza A(H7N9) virus by real-time reverse transcription polymerase chain reaction. Genetic sequencing and phylogenetic analysis were also conducted. Results: Five patients were reported in the outbreak. An epidemiological investigation showed that all patients had been exposed at live poultry markets. The A(H7N9) isolates from these patients had low pathogenicity in avian species. Both epidemiological investigations of chicken sources and phylogenetic analysis of viral gene sequences indicated that the source of infection was from Guangxi Province, which lies 100 km to the east of Wenshan City. Conclusions: In the study, a sudden emergence of human cases of H7N9 was documented in urban area of Wenshan City. Chickens were an important carrier in the H7N9 virus spreading from Guangxi to Wenshan. Hygienic management of live poultry markets and virological screening of chickens transported across regions should be reinforced to limit the spread of H7N9 virus.

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