Volume 18, Number 7—July 2012
Human Infection from Avian-like Influenza A (H1N1) Viruses in Pigs, China
|Virus||HI antibody titers of chicken antiserum against†
|Classical swine A (H1N1)||Triple-reassortant A (H1N2)||A (H1N1) pdm09||Human seasonal A (H1N1)||Avian-like swine A (H1N1)§||Avian-like swine A (H1N1)¶|
|Classical swine A (H1N1)||512||512||512||‡||8||‡|
|Triple-reassortant A (H1N2)||1024||512||1,024||‡||8||‡|
|Human seasonal A (H1N1)||16||32||64||32||32||64|
|Avian-like swine A (H1N1)§||128||64||128||‡||512||256|
|Avian-like swine A (H1N1)¶||32||16||64||‡||256||256|
*Classical swine A (H1N1), A/swine/Guangdong/6/2010; triple-reassortant A (H1N2), A/swine/Tianjin/1/2007; A(H1N1)pdm09, A/swine/Heilongjiang/44/2009; human seasonal A (H1N1), A/swine/Hebei/15/2009.
†Antiserum was generated by inoculating specific pathogen-free chickens with an oil-emulsified inactivated vaccine derived from the indicated viruses. Homologous titers are shown in boldface.
‡HI titer <2.
1These authors contributed equally to this article.