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Salmonellosis in detail

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CDC Salmonella clinical overview diagnosis treatment invasive salmonellosis

Salmonellosis is infection caused by Salmonella species. It includes:
  1. Nontyphoidal salmonellosis (NTS): usually foodborne gastroenteritis, commonly from contaminated poultry, eggs, meat, unpasteurized foods, water, or animal contact.
  2. Enteric fever: typhoid fever (S. Typhi) and paratyphoid fever (S. Paratyphi), transmitted person-to-person through fecally contaminated food or water.
  3. Invasive focal disease: bacteremia, meningitis, osteomyelitis, endovascular infection, and other focal infections, particularly in high-risk people.
Most uncomplicated NTS cases cause acute diarrhea, fever, abdominal cramps, nausea, and sometimes vomiting. Culture or molecular testing of stool confirms infection. Rehydration is the main treatment; antibiotics are reserved for severe disease or those at high risk of invasive infection because routine use may prolong fecal carriage. The CDC clinical overview emphasizes culture diagnosis, supportive care for most patients, and susceptibility-guided antibiotics when indicated. Recent evidence also underscores the clinical burden associated with resistant strains (systematic review).
For a detailed study note, the topic map is:
  1. Classification and microbiology
  2. Epidemiology, reservoirs, and transmission
  3. Virulence factors and pathogenesis
  4. Clinical features of gastroenteritis, enteric fever, bacteremia, and focal disease
  5. Complications and high-risk groups
  6. Diagnosis and laboratory findings
  7. Treatment and antimicrobial-resistance considerations
  8. Prevention, food safety, vaccines, and public-health control
  9. Differences between typhoidal and nontyphoidal salmonellosis
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