infectious diseases
Nontyphoidal Salmonella Infections
Diagnosis
Cultures Diagnosis of nontyphoidalSalmonellainfections is by isolating the organism from stool or another infected site. In bacteremic and focal forms, blood cultures are positive, but stool cultures may be negative. Antibiotic resistance has become a problem with bothS.Typhi and nontyphoidalSalmonella, so antimicrobial susceptibility testing is important. In patients with gastroenteritis, stool specimens stained withmethylene blueoften show white blood cells, indicating inflammatory colitis. 