Little information is available on pulmonary tuberculosis in infants in sub-Saharan Africa. This retrospective study was conducted in infants ranging in age from 1 to 23 months admitted to the Paediatric Departments of the University Hospital Centre in Brazzaville, Congo for pulmonary tuberculosis between January 1, 1999 and July 1, 2004. Tuberculosis was diagnosed on the basis of epidemiological, clinical, radiological, and follow-up data. All children over 12 months old underwent HIV testing. In case of positive test results, children between the ages of 12 and 18 months were retested after the age of 18 months. Of a total of 803 children admitted for tuberculosis during the study period, 117 (14.6%) were under the age of 24 months (53% males). Mean age was 17.5 months. The BCG test was mentioned in 75.2% of cases. Determination of the contagion in 50.4% of cases indicated that transmission was intrafamilial in 69.3% of cases. The mean delay for hospitalization was 2.6 months (range, 21 days to 16 months). Eighty-one patients (69.2%) presented severe malnutrition. Intrathoracic forms accounted for most cases with bronchopneumopathy (72.6%) and mediastinal adenopathy (40.2%). The incidence of bronchopneumonopathy and isolated forms was significantly higher in children over one year old than in children under one year old: 78.3% versus 21.7 % (p<0.01) and 62.8% versus 37.2% (p<0.001) respectively. A total of 35 children (43.8%) over the age of 12 months presented HIV infection. In comparison with HIV-negative children, HIV-positive children were more likely to present malnutrition and presented a statistically higher incidence of mediastinal adenopathy and multifocal forms. All associated extrathoracic lesions (21.4% of cases) occurred in HIV-positive children. Outcome was favourable in all HIV-negative children while 7 HIV-positive children (20%) died during treatment. Pulmonary tuberculosis in infants in Brazzaville is characterized by frequent association with HIV infection and prognosis is more severe in case of HIV co-infection.
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