Salmonella enterica

Please note: This is for information only.

Refer to local guidelines for treatment recommendations


  • A Gram-negative bacillus belonging to the diverse family of Enterobacteriacae (coliforms).
  • There are over 3,000 different serotypes.
  • Most salmonellae cause gastro-enteritis, but some cause severe systemic disease – enteric fever (serotypes Typhi, Paratyphi A, B, C).
  • Infection control precautions are required (enteric precautions).
  • Transmission is by the oral faecal route, so hand hygiene (patient and carer) is important.
  • Gastro-enteritis is diagnosed by stool culture.
  • Blood and stool cultures are required for diagnosing enteric fever.

Main clinical infections:

  • Gastroenteritis
  • Typhoid
  • Septicaemia
  • Rarely meningitis
  • Osteomyelitis

Usually sensitive to:

  • Note: antibiotic treatment of salmonella gastroenteritis is only recommended for elderly patients, those with invasive disease or typhoid/paratyphoid.
  • Ciprofloxacin
  • Chloramphenicol
  • Ceftriaxone

Usually resistant to:

  • Amoxicillin
  • Trimethoprim