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Volume 17, Number 6—June 2011
Dispatch

Reassortant Pandemic (H1N1) 2009 Virus in Pigs, United Kingdom

Wendy A. Howard, Steve C. Essen, Benjamin W. Strugnell, Christine Russell, Laura Barrass, Scott M. Reid, and Ian H. BrownComments to Author 
Author affiliations: Author affiliations: Veterinary Laboratories Agency–Weybridge, Addlestone, UK (W.A. Howard, S.C. Essen, C. Russell, L. Barrass, S.M. Reid, I.H. Brown); Veterinary Laboratories Agency–Thirsk, Thirsk, UK (B.W. Strugnell)

Main Article

Table 2

Serologic cross-reactivity titers of acute-phase and convalescent-phase swine serum samples against subtypes of swine influenza viruses, United Kingdom*

Phase and pig no. Virus
A/Swine/England/438207/94, subtype H1N2 A/Swine/England/195852/92, subtype H1N1 A/swine/England/1353/09, pandemic (H1N1) 2009 A/swine/England/1382/10, reassortant subtype H1N2
Acute phase
1 <10 40 320 <10
2 <10 <10 160 <10
3 <10 <10 160 <10
4 <10 <10 320 <10
5 <10 <10 160 <10
6 <10 <10 320 <10
7 <10 <10 640 <10
8 <10 <10 320 <10
9 <10 <10 <10 <10
10
 <10
 <10
 80
 <10
Convalescent phase
1 80 20 2,560 160
2 <10 <10 5,120 160
3 <10 <10 2,560 80
4 160 160 1,280 160
5 <10 <10 1,280 80
6 640 160 5,120 160
7 <10 <10 2,560 320
8 160 40 5,120 320
9 320 320 2,560 160

*Acute-phase serum samples were obtained from 10 pigs in the same batch during the time when clinical signs were apparent (≈2 wk after arrival at the unit). Convalescent-phase serum samples were obtained from 9 pigs in the same batch 21 d later. Standard hemagglutinin inhibition assays were conducted with subtype H1N1, pandemic (H1N1) 2009, and subtype H1N2 virus antigens derived from UK swine isolates. Homologous A/swine/England/1382/10 antigen was also used.

Main Article

Page created: August 04, 2011
Page updated: August 04, 2011
Page reviewed: August 04, 2011
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