Pulmonary Non-tuberculous Mycobacterial Infections in Category II Failures from National Tuberculosis Programme.

Pulmonary infections due to non-tuberculous mycobacteria (NTM) are increasingly being reported. These can mimic drug-resitant tubercuolosis. A diagnosis of NTM infections needs a high degree of clinical suspicion and repeated isolation of the organism on culture. NTM infections occur commonly in immunocompromised individuals and in people with lung abnormalities. Currently there are no guidelines on drug combinations and the duration of treatment is not adequately defined. Two cases of pulmonary infection with NTM in immune-competent individuals are described in the present report. Although the bacteriological, radiological and clinical response to treatment was good; early discontinuation of treatment resulted in recurrence and change in drug susceptibility pattern, suggesting the need for prolonged treatment for achieving cure.

Observations on categorisation of new TB cases: implications for controlling drug resistance.

In the context of rising rates of drug-resistant tuberculosis (TB) in India, this communication presents some field observations during screening of new cases registered with the Revised National Tuberculosis Control Programme (RNTCP) in urban and rural areas of Maharashtra, India. It appears that erroneous categorisation and treatment that contributes to multiple drug resistance results from a lack of patient screening for previous treatment, ambiguity in categorisation and reluctance to disclose a history of anti-tuberculosis treatment. Suggested measures include detailed screening of new cases, computerisation of patient records and an empathetic dialogue between patient and health care provider.

Severe weight loss: the predominant clinical presentation of tuberculosis in patients with HIV infection in India.

BACKGROUND: Tuberculosis is endemic in India and its prevalence is reported to be increasing in patients with human immuno-deficiency virus (HIV) infection. Several factors, including the level of immune deficiency, influence the clinical presentation of HIV-associated tuberculosis. METHODS: Between April 1994 and April 1996, 1820 patients with confirmed HIV infection were studied for their clinical, radiological and laboratory parameters. Severe weight loss was observed as a frequent presenting complaint. Hence, a case-control analysis was performed using severe weight loss as the presenting criterion among HIV-seropositive patients. RESULTS: Of the 1820 patients with HIV infection, 410 (23%) presented with severe weight loss of > 10% of body weight within the preceding month. Of these 410 patients, 176 (43%) had tuberculosis, 94 (23%) had chronic diarrhoea, and 89 (22%) had recurrent fever. Among 176 patients with tuberculosis, the following types of HIV-associated tuberculosis were seen: 115/176 (66%) had pulmonary, 49/176 (28%) had extrapulmonary tuberculosis; of these 49 cases with extrapulmonary tuberculosis 33 (18%) had disseminated tuberculosis, and 12/176 (7%) had both pulmonary and extrapulmonary involvement. In the group as a whole, 45/176 (25%) cases had disseminated tuberculosis. Clinical features of HIV-associated tuberculosis in decreasing order of frequency were chronic fever, chronic cough, lymphadenopathy and hepatosplenomegaly. The Mantoux skin test was significantly anergic among patients with extrapulmonary and disseminated tuberculosis (p = 0.001). CONCLUSIONS: There was a significant correlation between severe weight loss and tuberculosis (RR 17.5), chronic diarrhoea (RR 12.8) and recurrent fever (RR 4.5). The diagnostic value of the Mantoux skin test among HIV-associated tuberculosis is reduced, more so among those with extrapulmonary and disseminated forms.