Swine influenza virus infection in different age groups of pigs in farrow-to-finish farms in Thailand

Table 2 Swine influenza viruses isolated throughout the surveillance

Virrus	subtype	farm	isolated from (age):	Sampling date	Gene constellation^a
					HA	NA	PB2	PB1	PA	M	NP	NS
A/swine/Ratchaburi/NIAH101942/2008	H1N1	A	Fattening pig (12-wks)	2008/1/29	Clb	Ala	Ala	Ala	Alb	Alb	Ala	Ala
A/swine/Saraburi/NIAH100761-22/2009
A/swine/Saraburi/NIAH100761-23/2009^b	H1N1	B	Weaned piglet (4-wks)	2009/1/14	-	-	-	-	-	-	-	-
A/swine/Saraburi/NIAH100761-26/2009^b
A/swine/Saraburi/NIAH116625-11/2009
A/swine/Saraburi/NIAH116625-12/2009^b
A/swine/Saraburi/NIAH116625-13/2009^b	H1N1	B	Weaned piglet (8-wks)	2009/11/18	-	-	-	-	-	-	-	-
A/swine/Saraburi/NIAH116625-16/2009^b
A/swine/Saraburi/NIAH116625-17/2009^b
A/swine/Saraburi/NIAH107725-28/2008	H3N2	B	Weaned piglet (4-wks)	2008/6/9	Ha	Ha	-	-	Ala	Ala	Cla	Cla
A/swine/Saraburi/NIAH109713-36/2009	H3N2	B	Introduced pig (8-wks)	2009/7/1	Ha	Ha	-	-	Ala	Ala	Cla	Cla
A/swine/Saraburi/NIAH116627-24/2009	H1N1	D	Weaned piglet (8-wks)	2009/11/15	H1N1pdm origin^c

^aPhylogenetic origins that are differrent from A/swine/Ratchaburi/NIAH101942/2008 are shown. Abbreviations are according to Takemae et al., (2008). Cl, AL and H stand for classical swine, avian-like swine and human origins, respectively. The small characters 'a' and 'b' after the origins show different clusters
^bPhylogenetical origins of internal genes were determined by partial sequences
^cAll of genes of A/swine/Saraburi/NIAH116627-24/2009 were derived from pandemic (H1N1) 2009 (H1N1pdm) viruses

ISSN: 1743-422X