Erasmus, J.A.Bigalke, R.D.2015-11-192015-11-1920151983Erasmus, JA 1983, 'The usefulness of the API 20 E classification system in the identification of Actinobacillus actinomycetem comitans, Actinobacillus seminis and Pasteurella haemolytica', Onderstepoort Journal of Veterinary Research, vol. 50, no. 2, pp. 97-99.0330-2465http://hdl.handle.net/2263/50521The articles have been scanned in colour with a HP Scanjet 5590; 600dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format.The prepuces of lambs aged 6-8 months and semen of 2 adult rams were found to be infected with gram-negative, non-motile, non-haemolytic, pleomorphic bacilli. These organisms were compared with those of known strains of Actinobacillus actinomycetem comitans, Actinobacillus seminis and Pasteurella haemolytica, using the API 20 E classification system. Applying the principles of numerical taxonomy, the majority of suspected strains of A. seminis could be classified as A. actinomycetem comitans and 3 examples as Histophilus ovis. Although some of the suspected strains of A. seminis could be classified as P. haemolytica, obvious differences between the genera Actinobacillus and Pasteurella were evident.en©ARC - Onderstepoort and Faculty of Veterinary Science, University of Pretoria (original). ©University of Pretoria. Dept. of Library Services (digital).Veterinary medicineVeterinary medicine -- South AfricaArticle