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Haemophilus species (view source)

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*''Haemophilus sommus'' in [[Bacterial infections#Enzootic pneumonia of calves|Enzootic pneumonia of calves]]

*''H. pleuropneumonia'' in [[Bacterial infections#Contagious porcine pleuropneumonia|Contagious porcine pleuropneumonia]]

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===''Haemophilus characteristica''===

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*Morphologically variable Gram-negative bacilli, ranging from short rods to long filaments

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*Oxidase negative

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*Depend on beta-nicotinamide adenine dinucleotide (NAD) and/or Haemin for growth

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*Heated blood agar (Chocolate Agar) required for growth of NAD-dependent strains

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*Haemin-dependent strains grow on Blood Agar

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*Do not grow on MacConkey agar

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*Inhabit mucosal epithelium of respiratory and genital tract

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===''Haemophilus parasuis''===

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*Serotype B causes

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