Characteristics of typhoid fever in children and adolescents in a major metropolitan area in the United States.

To examine the epidemiology of typhoid fever in children in an area that was not endemic, we analyzed 55 cases of typhoid fever in children and adolescents who were < or = 18 years and whose cases were reported to the Chicago and suburban Cook County Health Departments over 7 years. Cases had positive blood and/or stool cultures for Salmonella typhi. The ethnic distribution of the patients was as follows: 25% Asian, 22% Hispanic, 15% African American, 9% Caucasian, 18% other, and 11% unknown. Of the 55 cases, 35% were aged 0-5 years, 25% were aged 6-10 years, 31% were aged 11-15 years, and 9% were aged 16-18 years. Twelve patients did not have a history of travel. All patients recovered; none became carriers. Symptoms in 41 patients whose charts were available for review included fever (100%), diarrhea (77%), vomiting (50%), and dehydration (30%). Bacteremia was documented in 27 (66%) of 41 cases. In 17 of 41 cases, the household contacts were food handlers or health care workers. Eight (31%) of 26 isolates were resistant to both ampicillin and trimethoprim-sulfamethoxazole. The findings in our study were as follows: typhoid fever occurred frequently in children aged 0-5 years (in contrast with reports from areas of endemicity), approximately 20% of patients did not have a history of travel, and multidrug-resistant strains were prevalent.