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  • Title: Pasteurella pneumotropica and the prevalence of the AHP (Actinobacillus, Haemophilus, Pasteurella)-group in laboratory animals.
    Author: Kunstýr I, Hartmann D.
    Journal: Lab Anim; 1983 Apr; 17(2):156-60. PubMed ID: 6345932.
    Abstract:
    134 bacterial isolates originally identified as Pasteurella pneumotropica were cultured from healthy, ill or dead mice, rats, hamsters, guinea pigs, rabbits and cats originating from 7 conventional laboratory animal facilities. They occurred seldom in pure culture and were found in a variety of organs. Thorough identification (41 criteria) revealed that only 83 isolates (62%) were P. pneumotropica and could be subdivided into 3 biotypes. 3 isolates were P. aerogenes, 1 was P. ureae, 11 (8%) were qualified as Actinobacillus spp. and 13 (10%) as Haemophilus spp. Close relationship of the 3 genera--the 'AHP-group' --made the differentiation difficult. 23 atypical cultures were discarded at the beginning of the study as not belonging to the 'AHP-group'. Two-thirds of isolates were associated with inflammation or suppuration; Haemophilus spp. seemed to be more pathogenic than Pasteurella and Actinobacillus species.
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