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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Avian influenza H5N1 virus infections in vaccinated commercial and backyard poultry in Egypt
Poultry Science, Volume 89, No. 8, Year 2010
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Description
In this paper, we describe results from a high-pathogenic H5N1 avian influenza virus (AIV) surveillance program in previously H5-vaccinated commercial and family-backyard poultry flocks that was conducted from 2007 to 2008 by the Egyptian National Laboratory for Veterinary Quality Control on Poultry Production. The real-time reverse transcription PCR assay was used to detect the influenza A virus matrix gene and detection of the H5 and N1 subtypes was accomplished using a commercially available kit real-time reverse transcription PCR assay. The virus was detected in 35/3,610 (0.97%) and 27/8,682 (0.31%) of examined commercial poultry farms and 246/816 (30%) and 89/1,723 (5.2%) of backyard flocks in 2007 and 2008, respectively. Positive flocks were identified throughout the year, with the highest frequencies occurring during the winter months. Anti-H5 serum antibody titers in selected commercial poultry ranged from <2 (negative) to 9.6 log2 when determined in the hemagglutination inhibition test using a H5 AIV antigen. In conclusion, despite the nationwide vaccination strategy of poultry in Egypt to combat H5N1 AIV, continuous circulation of the virus in vaccinated commercial and backyard poultry was reported and the efficacy of the vaccination using a challenge model with the current circulating field virus should be revised. © 2010 Poultry Science Association Inc.
Authors & Co-Authors
Hafez, M. H.
Germany, Berlin
Freie Universität Berlin
Arafa, Abdel Satar A.
Egypt, Giza
Central Laboratory for Quality Control of Poultry Productionclqp
Abdelwhab, Elsayed M.
Egypt, Giza
Central Laboratory for Quality Control of Poultry Productionclqp
Germany, Tubingen
Friedrich-loeffler-institute
Selim, Abdullah A.
Egypt, Giza
Central Laboratory for Quality Control of Poultry Productionclqp
Khoulosy, Shereen G.
Egypt, Giza
Central Laboratory for Quality Control of Poultry Productionclqp
Hassan, Mohammed Ismail
Egypt, Giza
Central Laboratory for Quality Control of Poultry Productionclqp
Aly, Mona Meherez
Germany, Berlin
Freie Universität Berlin
Statistics
Citations: 96
Authors: 7
Affiliations: 3
Identifiers
Doi:
10.3382/ps.2010-00708
ISSN:
00325791
e-ISSN:
15253171
Research Areas
Genetics And Genomics
Study Locations
Egypt