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

dc.contributor.authorBragg, R.R. (Robert Richard)
dc.contributor.editorBoomker, Jacob Diederik Frederik
dc.date.accessioned2012-02-28T07:57:48Z
dc.date.available2012-02-28T07:57:48Z
dc.date.created2012
dc.date.issued2002
dc.descriptionThe 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.abstractNaturally 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.librarianmn2012en
dc.description.sponsorshipNRF. ImmunoVet Services.en
dc.identifier.citationBragg, 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.issn0030-2465
dc.identifier.urihttp://hdl.handle.net/2263/18256
dc.languageen
dc.publisherPublished 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.subjectVeterinary medicineen
dc.subjectHaemophilus paragallinarumen
dc.subjectNAD-independenceen
dc.subjectVirulenceen
dc.subject.lcshVeterinary medicine -- South Africa
dc.subject.lcshHaemophilus parainfluenzaeen
dc.subject.lcshHaemophilus -- South Africaen
dc.titleVirulence of South African isolates of Haemophilus paragallinarum. Part 2: Naturally occurring NAD-independent field isolatesen
dc.typeArticleen

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