AI Article Synopsis
- The study examined the genotypes of Mycobacterium tuberculosis in pulmonary TB patients at a hospital in Delhi, identifying a potential link between eight strains implying small-scale transmission.
- Genetic markers indicated that both drug-sensitive and drug-resistant strains might be spreading within the hospital environment.
- This research highlights the importance of thorough investigations in high-risk areas for TB transmission and the need for ongoing monitoring to identify unnoticed cases.
Article Abstract
Genotypes of Mycobacterium tuberculosis causing disease were investigated in pulmonary tuberculosis patients admitted to two adjacent wards of a tuberculosis hospital in Delhi, India. Genetic markers, the insertion sequence IS6110, a direct repeat sequence, and a polymorphic GC-rich sequence supported the circumstantial epidemiologic link between eight strains of M. tuberculosis, suggesting their possible involvement in small-scale, interpersonal transmission of both drug-sensitive and drug-resistant tuberculosis. This is the first report of a suspected acquisition of M. tuberculosis among hospitalized patients in India. The use of multiple molecular typing markers and techniques unequivocally identified the exact clonality of strains isolated from the hospital. The result of this study emphasizes the need for more comprehensive investigation of high-risk situations for tuberculosis transmission and long-term follow-up analysis for identifying such instances of unsuspected transmission.
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