Difference between revisions of "Salmonella"
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*Important member of the enterobacteria | *Important member of the enterobacteria | ||
| − | *Cause disease in humans and animals | + | *Cause disease in humans and animals |
| + | *Oral transmission | ||
*Reservior of infection in poulty, pigs, rodents, cattle, dogs | *Reservior of infection in poulty, pigs, rodents, cattle, dogs | ||
*Cause enteritis and systemic infection (septicaemia and abortion) | *Cause enteritis and systemic infection (septicaemia and abortion) | ||
| Line 34: | Line 35: | ||
===Characteristics=== | ===Characteristics=== | ||
| − | |||
| − | |||
*Facultative intracellular pathogens | *Facultative intracellular pathogens | ||
*Non-lactose fermentor | *Non-lactose fermentor | ||
| Line 41: | Line 40: | ||
*Utlise citrate as a carbon source | *Utlise citrate as a carbon source | ||
*Usually produce hydrogen sulphide | *Usually produce hydrogen sulphide | ||
| + | |||
| + | ===Classification=== | ||
| + | |||
| + | *Single species, ''Salmonella enterica'' | ||
| + | *Over 2400 pathogenic serotypes or serovars identified | ||
===Pathogenesis=== | ===Pathogenesis=== | ||
Revision as of 18:10, 16 February 2008
- Some serotypes tend to be more species specific, whereas others can affect a wide range of species. For example:
- Salmonella enteritidis
- Salmonella typhimurium
- Widespread in most species.
- Salmonella dublin
- Cattle
- Salmonella cholerae suis
- Pigs
- Usually speticaemic.
- A cause of ulcerative enteritis in the pig.
- Not very common now.
- Salmonella montevideo
- Produces outbreaks from contaminated imported meat and bone meal.
- Salmonellosis
- * Can cause haemorrhagic disease by secondary thrombocytopenic disease.
- Salmonella in Osteomyelitis
- In arthritis of horses
Overview
- Important member of the enterobacteria
- Cause disease in humans and animals
- Oral transmission
- Reservior of infection in poulty, pigs, rodents, cattle, dogs
- Cause enteritis and systemic infection (septicaemia and abortion)
- Salmonella may be carried sub-clinically
- Some human strains cause enteric fever (S. Typhi causes typhoid), also gastroenteritis, septicaemia or bacteraemia
Characteristics
- Facultative intracellular pathogens
- Non-lactose fermentor
- Do not produce urease or indole from tryptophan
- Utlise citrate as a carbon source
- Usually produce hydrogen sulphide
Classification
- Single species, Salmonella enterica
- Over 2400 pathogenic serotypes or serovars identified