NDLI: First outbreaks and phylogenetic analyses of avian influenza H9N2 viruses isolated from poultry flocks in Morocco

Content Provider	Springer Nature : BioMed Central
Author	EL Houadfi, Mohammed Fellahi, Siham Nassik, Saadia Guérin, Jean-Luc Ducatez, Mariette F.
Abstract	Background H9N2 avian influenza viruses continue to spread in poultry and wild birds worldwide. Morocco just faced its first H9N2 influenza virus outbreaks early 2016 affecting different types of poultry production. After its introduction, the virus spread very rapidly throughout the country. Methods Samples were collected from 11 chicken flocks with high morbidity and mortality rates. Four viruses were successfully isolated from broiler chickens and one from broiler breeders and fully sequenced. Results Phylogenetic and molecular markers analyses showed the Moroccan viruses belonged to the G1 lineage and likely originated from the Middle East. As known for H9N2 viruses, the Moroccanisolates possess several genetic markers that enhance virulence in poultry and transmission to humans. Conclusion The present study demonstrated that under field conditions H9N2 could have a devastating effect on egg production and mortalities and highlighted a lack of surveillance data on the pathogen in the region.
Related Links	https://virologyj.biomedcentral.com/counter/pdf/10.1186/s12985-016-0596-1.pdf
Ending Page	7
Page Count	7
Starting Page	1
File Format	HTM / HTML
DOI	10.1186/s12985-016-0596-1
Journal	Virology Journal
Issue Number	1
Volume Number	13
Language	English
Publisher	BioMed Central
Publisher Date	2016-08-15
Access Restriction	Open
Subject Keyword	Virology Influenza Virus H9N2 Phylogenetic analyses Morocco
Content Type	Text
Resource Type	Article
Subject	Virology Infectious Diseases
Journal Impact Factor	4/2023
5-Year Journal Impact Factor	3.8/2023

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