A healthy 6-week-old girl exposed to tuberculosis presented a positive
DNA amplification for Mucobacterium tuberculosis complex in gastric a
spirates and cerebrospinal fluid whereas she had no other clinical or
biological symptoms. Cultures were negative. This report underlines th
e interest of polymerase chain reaction for early diagnosis of tubercu
losis and suggests the importance of treating exposed neonates and you
ng infants just as active tuberculosis.