Volume 8, Number 11—November 2002
Tuberculosis Genotyping Network, United States
Identifying the Sources of Tuberculosis in Young Children: A Multistate Investigation
|Source patient characteristics||No. (%)|
|Age group, yrs|
|Race or ethnicity|
|Black, non-Hispanic||22 (42)|
|Native American or Alaskan Native||2 (4)|
|Bacteriologic results, sputum|
|Smear positive/culture positive||42 (79)|
|Smear positive/culture negative||1 (2)|
|Smear negative/culture positive||8 (15)|
|Smear not done/culture not done||2 (4)|
|Cavitary chest radiographc||33 (63)|
|Health department||31 (58)|
|Private provider||11 (11)|
|Directly observed therapyd||47 (71)|
|Previous diagnosis of TB||5 (9)|
|Drug-resistant isolatee||5 (9)|
aThree source patients were identified as the source of infection for more than one culture-confirmed patient who was <5 years of age in the sentinel study population; two source patients transmitted to two children, and one transmitted to three children.
bCountry of origin was Mexico for 14 (26%) of the foreign-born patients.
cResults unknown for one patient.
dCompared to patients on self-administered therapy.
eDrug resistance on initial testing of isolate; resistance to at least one of the following: isoniazid, rifampin, ethambutol, pyrazinamide, streptomycin, and ethionamide. Testing results for one or more drugs could have been unknown or not done. Excludes one source patient for whom drug susceptibility testing was not done.