Molecular and Epidemiological overview on Low Pathogenic Avian Influenza H9N2 in Egypt between 2015 and 2016
Molecular and Epidemiological overview on Low Pathogenic Avian Influenza H9N2 in Egypt between 2015 and 2016
Amany Adel, Wesam Mady*, Zienab Mosad, Fatema Amer, Asmaa Shaaban, Dalia Said, Marwa Ali Abdel Maged, Abdel-Satar Arafa, Mohamed Kamal Morsi, Mohamed Khalifa Hassan
ABSTRACT
Since the first isolation of the H9N2 low pathogenic avian influenza virus in 2011, the virus has distributed rapidly and widely in different poultry sectors in Egypt causing severe economic losses and the problematic situation in poultry production especially with a co-infection with other circulating pathogens. In this study, 1026 confirmed positive H9N2 cases by RT-PCR out of 23182 different examined samples of different species and sectors in Egypt, with a prevalence rate 4.4% by the year 2015/2016. However, the LPAI H9N2 showed a wide range distribution with high geo-prevalence rate in 2015/2016 (96.3%) as positive cases were recorded in 26 governorates., the positive samples were distributed in 783 farms with the highest prevalence rate (76.5%), Also, the most of positive cases were detected in chicken as the highest prevalence (90%) among all the examined species, Genetically, the genetic sequence for the Hemagglutinin (HA) and Neuraminidase (NA) of circulating Egyptian viruses are belonging to the Middle East G1- like viruses in group B that were closely related to each other and scattered phylogenetically in different subgroups with the presence of variant viruses in the quail during 2015.
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