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Cross-protection study of the nine serovars of Haemophilus paragallinarum in the Kume haemagglutinin scheme

Soriano, Edgardo.V. and Garduno, M. Longinos and Tellez, Guillermo and Rosas, P. Fernandez and Suarez-Guemes, F. and Blackall, P.J. (2004) Cross-protection study of the nine serovars of Haemophilus paragallinarum in the Kume haemagglutinin scheme. Avian Pathology, 33 (5). pp. 506-511.

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Article Link(s): http://dx.doi.org/10.1080/03079450400003502

Publisher URL: http://www.tandf.co.uk/journals/alphalist.asp

Abstract

The cross-protection and haemagglutination-inhibition antibodies present in chickens vaccinated with one of the nine currently recognized Kume haemagglutinin serovars of Haemophilus paragallinarum were investigated. The results confirmed the widely accepted dogma that serogroups A, B, and C represent three distinct immunovars. Within Kume serogroup A, there was generally good cross-protection among all four serovars. However, within Kume serogroup C, there was evidence of a reduced level of cross protection between some of the four serovars. The haemagglutination-inhibition antibody levels generally showed the same trend as with the cross-protection results. This study suggests that some apparent field failures of infectious coryza vaccines may be due to a lack of cross-protection between the vaccine strains and the field strains. Our results will help guide the selection of strains for inclusion in infectious coryza vaccines.

Item Type:Article
Additional Information:© Houghton Trust Ltd. © Taylor & Francis.
Keywords:Haemophilus paragallinarum; chickens; acute respiratory disease.
Subjects:Veterinary medicine > Diseases of special classes of animals > Avian
Veterinary medicine > Veterinary virology
Deposited On:17 Jan 2006
Last Modified:08 Jun 2011 00:09

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