Difference between revisions of "Haemophilus species"
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===''Haemophilus characteristica''=== | ===''Haemophilus characteristica''=== | ||
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**Causes a polyserositis - pericarditis, [[Peritoneal cavity - inflammatory#Peritonitis|peritonitis]], pleurisy and meningitis - in pigs 3-10 weeks old | **Causes a polyserositis - pericarditis, [[Peritoneal cavity - inflammatory#Peritonitis|peritonitis]], pleurisy and meningitis - in pigs 3-10 weeks old | ||
**Also causes suppurative [[Bacterial infections#Glasser's disease|bronchopneumonia, pleuritis]], [[Joints - inflammatory#In Pigs|polyarthritis]] (also ''H. suis) | **Also causes suppurative [[Bacterial infections#Glasser's disease|bronchopneumonia, pleuritis]], [[Joints - inflammatory#In Pigs|polyarthritis]] (also ''H. suis) | ||
| + | **Expressed lesions vary between animals - meningitis is most consistent, arthritis in 20% of cases | ||
**Sporadic outbreaks in the UK | **Sporadic outbreaks in the UK | ||
**Can be fatal in 2-5 days | **Can be fatal in 2-5 days | ||
**Mortality up to 50% insome outbreaks | **Mortality up to 50% insome outbreaks | ||
**Chronic arthritis, meningitis and intestinal obstruction due to adhesions in surviving pigs | **Chronic arthritis, meningitis and intestinal obstruction due to adhesions in surviving pigs | ||
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*Fibrinous pneumonia secondary to enzootic pneumonia or virus infection | *Fibrinous pneumonia secondary to enzootic pneumonia or virus infection | ||
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===''Haemophilus somnus''=== | ===''Haemophilus somnus''=== | ||
| + | *''Haemophilus sommus'' in [[Bacterial infections#Enzootic pneumonia of calves|Enzootic pneumonia of calves]] | ||
*Causes infectious thromboencephalitis in cattle 1-3 years old | *Causes infectious thromboencephalitis in cattle 1-3 years old | ||
*Found in the USA and Europe, including UK | *Found in the USA and Europe, including UK | ||
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*Causes fever, staggering and dyspnoea, progressing to somnolence, paralysis and death | *Causes fever, staggering and dyspnoea, progressing to somnolence, paralysis and death | ||
*Mortality can be high | *Mortality can be high | ||
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| + | ===''Haemophilus pleuopneumonia''=== | ||
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| + | *''H. pleuropneumonia'' in [[Bacterial infections#Contagious porcine pleuropneumonia|Contagious porcine pleuropneumonia]] | ||
Revision as of 15:16, 17 December 2007
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 Glasser's disease in pigs
- Glasser's disease
- Due to transport, environmental stresses, dietary and managemental factors
- Acute septicaemia
- Causes a polyserositis - pericarditis, peritonitis, pleurisy and meningitis - in pigs 3-10 weeks old
- Also causes suppurative bronchopneumonia, pleuritis, polyarthritis (also H. suis)
- Expressed lesions vary between animals - meningitis is most consistent, arthritis in 20% of cases
- Sporadic outbreaks in the UK
- Can be fatal in 2-5 days
- Mortality up to 50% insome outbreaks
- Chronic arthritis, meningitis and intestinal obstruction due to adhesions in surviving pigs
- Fibrinous pneumonia secondary to enzootic pneumonia or virus infection
Haemophilus somnus
- Haemophilus sommus in Enzootic pneumonia of calves
- Causes infectious thromboencephalitis in cattle 1-3 years old
- Found in the USA and Europe, including UK
- Causes a meningoencephalitis with fibrinous arterial thrombosis and necrosis
- Causes fever, staggering and dyspnoea, progressing to somnolence, paralysis and death
- Mortality can be high
Haemophilus pleuopneumonia
- H. pleuropneumonia in Contagious porcine pleuropneumonia
Haemophilus paragalinarum
- Conjunctivitis in poultry
Haemophilus influenzae
- Human respiratory disease