Haemophilus species
Jump to navigation
Jump to search
BACK TO INFECTIOUS AGENTS AND PARASITES
BACK TO BACTERIA
- H. parasuis in Glasser's disease of pigs causes peritonitis, suppurative bronchopneumonia, pleuritis, pericarditis, (as part of polyserositis), meningitis, polyarthritis (also H. suis)
- In pigs 5-16 weeks old
- Acute septicaemia
- Due to transport, environmental stresses, dietary and managemental factors
- Mortality up to 50% insome outbreaks
- Expressed lesion vary between animals - meningitis is most consistent, arthritis in 20% of cases
- Haemophilus sommus in Enzootic pneumonia of calves
- H. pleuropneumonia in Contagious porcine pleuropneumonia
Haemophilus characteristica
- Morphologically variable Gram-negative bacilli, ranging from short rods to long filaments
- Oxidase negative
- Depend on beta-nicotinamide adenine dinucleotide (NAD) and/or Haemin for growth
- Heated blood agar (Chocolate Agar) required for growth of NAD-dependent strains
- Haemin-dependent strains grow on Blood Agar
- Do not grow on MacConkey agar
- Inhabit mucosal epithelium of respiratory and genital tract
Haemophilus parasuis
- Serotype B causes