Intestinal Involvement in Salmonella Infection

Pathophysiology and Clinical Manifestations

In typhoid fever, which is caused by specific Salmonella serotypes (S. Typhi and S. Paratyphi), perforations typically occur in the ileum or jejunum 1
Salmonella infection presents with three major clinical syndromes: self-limited gastroenteritis, more severe prolonged diarrheal disease with fever and bloody diarrhea, and septicemia with potential extraintestinal involvement, as recommended by the Centers for Disease Control and Prevention 2
Bloody diarrhea can occur with Salmonella infection, indicating significant colonic inflammation, according to the Centers for Disease Control and Prevention 2
Symptoms typically include abdominal pain, fever, and diarrhea due to the inflammatory response in the affected intestinal segments 4

Diagnosis of Salmonella infection is established through stool cultures and blood cultures, as recommended by the Centers for Disease Control and Prevention 2
Due to the high rate of bacteremia in immunocompromised patients, blood cultures should be obtained from any patient with diarrhea and fever, according to the Centers for Disease Control and Prevention 2
Endoscopy may reveal ulcerations in the colon similar to those seen with other forms of colitis, as reported by the Centers for Disease Control and Prevention 2

The risk for more severe intestinal disease increases with the degree of immunosuppression, as reported by the Centers for Disease Control and Prevention 2
HIV-infected individuals have 20-100 times higher risk of Salmonella infection with increased likelihood of bacteremia and extraintestinal spread 3
Relapses in Salmonella infections after appropriate treatment are well-documented, particularly in immunocompromised patients, according to the Centers for Disease Control and Prevention 2

Scrupulous handwashing can reduce the risk of Salmonella infection, as recommended by the Centers for Disease Control and Prevention 2
Avoid consumption of raw or undercooked eggs, poultry, meat, and seafood, as recommended by the Centers for Disease Control and Prevention 2
Fluid and electrolyte replacement is the cornerstone of management for Salmonella gastroenteritis 4
Antimotility drugs should be avoided in cases of inflammatory diarrhea or diarrhea with fever, which is common with Salmonella infection 4

In typhoid fever, which is caused by specific Salmonella serotypes, intestinal perforation typically occurs in the third week of disease 1
Bacterial flagellins from Salmonella can directly activate signaling pathways in intestinal epithelial cells, triggering inflammation, as reported in the Journal of Allergy and Clinical Immunology 5
Impaired epithelial signaling through the flagellin/TLR pathway can result in an abnormal immune response and severe chronic inflammation, according to the Journal of Allergy and Clinical Immunology 5