Review analysis and impact of co-circulating H5N1 and H9N2 avian influenza viruses in Bangladesh

Epidemiology and Infection
Rokshana ParvinThomas W Vahlenkamp

Abstract

Almost the full range of 16 haemagglutinin (HA) and nine neuraminidase subtypes of avian influenza viruses (AIVs) has been detected either in waterfowl, land-based poultry or in the environment in Bangladesh. AIV infections in Bangladesh affected a wide range of host species of terrestrial poultry. The highly pathogenic avian influenza (AI) H5N1 and low pathogenic AI H9N2 were found to co-circulate and be well entrenched in the poultry population, which has caused serious damage to the poultry industry since 2007. By reviewing the available scientific literature, the overall situation of AIVs in Bangladesh is discussed. All Bangladeshi (BD) H5N1 and H9N2 AIV sequences available at GenBank were downloaded along with other representative sequences to analyse the genetic diversity among the circulating AIVs in Bangladesh and to compare with the global situation. Three different H5N1 clades, 2.2.2, 2.3.2.1 and 2.3.4.2, have been detected in Bangladesh. Only 2.3.2.1a is still present. The BD LP H9N2 viruses mostly belonged to the H9 G1 lineage but segregated into many branches, and some of these shared internal genes with HP viruses of subtypes H7N3 and H5N1. However, these reassortment events might have taken place before introduct...Continue Reading

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Citations

Sep 27, 2018·EFSA Journal·UNKNOWN European Food Safety AuthorityFrancesca Baldinelli
Apr 9, 2019·Epidemiology and Infection·Angel N Desai, Lawrence C Madoff
Mar 1, 2019·Viruses·Pilar Blanco-LoboLuis Martínez-Sobrido
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Oct 9, 2021·Scientific Reports·Natalie MoyenGuillaume Fournié
Jan 14, 2022·Veterinary Research Communications·Md Ashiqur RahmanMd Ahasanul Hoque
Jan 7, 2022·Transboundary and Emerging Diseases·Jasmine C M TurnerRichard J Webby

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