Gerdes, Gertruida HermannaOlivier, A.Williams, R.Verwoerd, Daniel Wynand2012-12-122012-12-1220121997Verwoerd, DJ, Gerdes, GH, Olivier, A & Williams, R 1997, 'Experimental infection of vaccinated slaughter ostriches with virulent Newcastle disease virus’. Onderstepoort Journal of Veterinary Research, vol. 64, no. 3, pp. 213-216.0330-2465http://hdl.handle.net/2263/20750The articles have been scanned in colour with a HP Scanjet 5590; 600dpi. Adobe Acrobat X Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format.A virulent Newcastle disease virus (NDV) isolate from an outbreak in commercial poultry, with virulence indices of MDT = 47-48 h; IVPI = 2,17 and ICPI = 1,8; was used to inoculate 10x vaccinated (standard poultry vaccines) as well as 10x unvaccinated slaughter ostriches via intratracheal, ocular and nasal routes, in a controlled environment. All unvaccinated ostriches developed clinical signs (mainly respiratory); two of them died while the other eight recovered. No vaccinated ostriches developed any clinical signs. All remaining (18) ostriches were slaughtered 14 d after the last mortality. Virulent NDV could be re-isolated from the dead birds, but not from organs, muscle (fresh), muscle (24 h chilled) , gastro-instestinal tract, bone-marrow or respiratory system taken from the slaughtered ostriches. It is suggested that it would be extremely unlikely that the international trade in ostrich meat could act as a mechanism for spreading virulent NDV from endemic to non-endemic parts of the world.en© ARC-Onderstepoort (original). © University of Pretoria. Dept of Library Services (digital).Veterinary medicineExperimental infectionNewcastle disease (ND)Vaccinated ostrichesVirulentVeterinary medicine -- South AfricaArticle