Reassortant Avian Influenza (original) (raw)

Abstract

Genetic characterization of a selection of infl uenza virus (H5N1) samples, circulating in 8 Nigerian states over a 39-day period in early 2007, indicates that a new reassortant strain is present in 7 of the 8 states. Our study reports an entirely different infl uenza virus (H5N1) reassortant becoming predominant and widespread in poultry. Since its emergence in 2006 in Africa, avian influenza viruses of the H5N1 subtype have spread rapidly to poultry farms in several African countries. In February 2006, Kaduna State in Nigeria was the first of 36 states to report infection of poultry with highly pathogenic avian influenza virus (H5N1). Currently, infection has spread to 22 of the 36 Nigerian states and to the Federal Capital Territory. In February 2007, 1 case of avian influenza was reported in a woman from the southern state of Lagos. Thus, the extensive circulation of influenza virus (H5N1) in Nigeria raises concerns about human and animal health issues. A previous study indicate...

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