Virulence of South African isolates of Haemophilus paragallinarum. Part 2: Naturally occurring NAD-independent field isolates

Bragg, R.R. (Robert Richard)

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dc.contributor.author	Bragg, R.R. (Robert Richard)
dc.contributor.editor	Boomker, Jacob Diederik Frederik
dc.date.accessioned	2012-02-28T07:57:48Z
dc.date.available	2012-02-28T07:57:48Z
dc.date.created	2012
dc.date.issued	2002
dc.description	The articles have been scanned in colour with a HP Scanjet 5590; 600dpi. Adobe Acrobat v.9 was used to OCR the text and also for the merging and conversion to the final presentation PDF-format.	en
dc.description.abstract	Naturally occurring NAD-independent variants of Haemophilus paragallinarum, which have been isolates from poultry showing clinical signs of infectious coryza, were used to determine their virulence using a newly developed challenge model for infectious coryza. It was established that the NAD-independent isolates belonging to a particular serogroup, were less virulent when compared to the virulence of the NAD-dependent isolates from the same serogroup. It was shown that the virulence of the NAD-independent isolates belonging to serogroup C and serogroup A were very similar to each other. This differs to the results obtained with NAD-dependent isolates reported on previously, in which the serogroup C isolates were found to be more virulent then the serogroup A isolates.	en
dc.description.librarian	mn2012	en
dc.description.sponsorship	NRF. ImmunoVet Services.	en
dc.identifier.citation	Bragg, RR 2002, 'Virulence of South African isolates of Haemophilus paragallinarum. Part 2: Naturally occurring NAD-independent field isolates’. Onderstepoort Journal of Veterinary Research, vol. 69, no. 2, pp. 171-175.	en
dc.identifier.issn	0030-2465
dc.identifier.uri	http://hdl.handle.net/2263/18256
dc.language	en
dc.publisher	Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria.	en
dc.rights	© ARC-Onderstepoort and Faculty of Veterinary Science, University of Pretoria (original). © University of Pretoria. Dept of Library Services (digital).	en
dc.subject	Veterinary medicine	en
dc.subject	Haemophilus paragallinarum	en
dc.subject	NAD-independence	en
dc.subject	Virulence	en
dc.subject.lcsh	Veterinary medicine -- South Africa
dc.subject.lcsh	Haemophilus parainfluenzae	en
dc.subject.lcsh	Haemophilus -- South Africa	en
dc.title	Virulence of South African isolates of Haemophilus paragallinarum. Part 2: Naturally occurring NAD-independent field isolates	en
dc.type	Article	en