Evolution of the M gene of the influenza A virus in different host species: large-scale sequence analysis

Table 1 Profile of sequences analyzed for selective pressure

Host	Total number	Number after excluding identical sequences	Year	Mean diversity
All hosts	5060	3011	1902 – 2008	0.100
Human	2763	1217	1918 – 2008	0.050
Avian	2009	1492	1902 – 2008	0.077
Swine	201	123	1930 – 2006	0.069
Canine/Equine	87	53	1963 – 2005	0.015

ISSN: 1743-422X