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- Title
Tracing the potential extra-household contacts of TB patients: findings from a personal social network survey in a high TB burden setting in India.
- Authors
Nagarajan, Karikalan; Muniyandi, Malaisamy; Palani, Bharathidasan; Sellappan, Senthil
- Abstract
Background Evidence on the extra-household contacts of TB patients who drive disease transmission is scarce. Methods We conducted a cross-sectional personal social network survey among 300 newly diagnosed index pulmonary TB patients to identify their first-degree extra-household contacts. Results A significantly higher proportion of neighbourhood (3.5; 95% CI 1.3 to 7.5), occupational (3.2; 95% CI 1.3 to 9.2) and friendship contacts (2.2; 95% CI 0.8 to 4.5) developed TB within 1 y of the index patient's diagnosis than their household contacts (0.7; 95% CI 0.3 to 1.3). Similarly, a higher proportion of extra-household contacts had TB at different time points before the index patient was diagnosed. Conclusion Extra-household contacts of TB patients could be a potential source of TB or could be at increased risk of TB.
- Subjects
INDIA; SOCIAL networks; TUBERCULOSIS; INFECTIOUS disease transmission; CONDUCT of life
- Publication
Transactions of the Royal Society of Tropical Medicine & Hygiene, 2022, Vol 116, Issue 2, p190
- ISSN
0035-9203
- Publication type
Article
- DOI
10.1093/trstmh/trab099