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Actinobacillus pleuropneumoniae
''Actinobacillus pleuropneumoniae'' (previously ''Haemophilus pleuropneumoniae''), is a Gram-negative, facultative anaerobic, respiratory pathogen found in pigs. It was first reported in 1957, and was formally declared to be the causative agent of porcine pleuropneumonia in 1964.〔(【引用サイトリンク】url=http://vetmed.iastate.edu/vdpam/newvdpam-employees/food-supply-veterinary-medicine/swine/swine-diseases/actinobacillus-pleuro )〕 It was reclassified in 1983 after DNA studies showed it was more closely related to ''A. lignieresii''.
==Microbiology==
''A. pleuropneumoniae'' is a nonmotile, Gram-negative, encapsulated coccobacillus bacterium found in the Pasteurellaceae family. It exhibits β-hemolysis activity, thus explaining its growth on chocolate or blood agar, but must be supplemented with NAD ('V factor') to facilitate growth for one of its biological variants (biovar 1).〔 As a facultative anaerobic pathogen, ''A. pleuropneumoniae'' may need CO2 to grow.〔 Depending on the biovar, the bacteria may or may not be positive for urease; both biovars are positive for porphyrin.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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