Difference between revisions of "Salmonella"

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*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)
 +
*''Salmonella'' may be carried sub-clinically
 +
*Some human strains cause enteric fever (''S. Typhi'' causes typhoid), also gastroenteritis, septicaemia or bacteraemia
  
 
===Characteristics===
 
===Characteristics===
  
 +
*Single species, ''Salmonella enterica''
 +
*Over 2400 pathogenic serotypes or serovars identified
 +
*Facultative intracellular pathogens
 
*Non-lactose fermentor
 
*Non-lactose fermentor
 
*Do not produce urease or indole from tryptophan
 
*Do not produce urease or indole from tryptophan

Revision as of 15:14, 9 February 2008

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  • 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
  • Salmonella montevideo
    • Produces outbreaks from contaminated imported meat and bone meal.


Overview

  • Important member of the enterobacteria
  • Cause disease in humans and animals
  • 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

  • Single species, Salmonella enterica
  • Over 2400 pathogenic serotypes or serovars identified
  • Facultative intracellular pathogens
  • Non-lactose fermentor
  • Do not produce urease or indole from tryptophan
  • Utlise citrate as a carbon source
  • Usually produce hydrogen sulphide

Pathogenesis

Clinical infections

Diagnosis

Treatment

Control