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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Active contact investigation and treatment support: an integrated approach in rural and urban Sindh, Pakistan.
International Journal of Tuberculosis and Lung Disease 2013 December
BACKGROUND: Although household contacts of persons with tuberculosis (TB) have high rates of active TB, contact investigations are often not conducted. We present the results from a large-scale active contact investigation combined with treatment support in Sindh, Pakistan.
METHODS: Trained lay workers visited consenting smear-positive index patient homes in seven urban and 15 rural facilities. People with suspected TB were provided free transport to diagnostic centres, and sputum samples were collected for microscopy. Those diagnosed with smear-positive TB were given food baskets and sent text reminders to promote adherence.
RESULTS: From 3037 index cases, 19,191 household contacts were screened for TB symptoms and 3478 (18.1%) symptomatic persons were identified. Of these, 2160 (62.1%) produced sputum samples on the spot for testing and 490 (22.7%) had smear-positive results. TB prevalence in urban households was 1504 per 100,000 population compared to 4044/100,000 in rural households (P < 0.001) and 2553/100,000 overall. Treatment success was high, with 80.4% cured and 17.6% completing treatment.
DISCUSSION: Lay workers given basic training can conduct active contact investigations and provide treatment support to improve case detection and treatment outcomes in urban and rural areas of Pakistan. In areas with high levels of undiagnosed TB, particularly in rural areas, contact investigation should be prioritised as a means of improving case detection and early diagnosis.
METHODS: Trained lay workers visited consenting smear-positive index patient homes in seven urban and 15 rural facilities. People with suspected TB were provided free transport to diagnostic centres, and sputum samples were collected for microscopy. Those diagnosed with smear-positive TB were given food baskets and sent text reminders to promote adherence.
RESULTS: From 3037 index cases, 19,191 household contacts were screened for TB symptoms and 3478 (18.1%) symptomatic persons were identified. Of these, 2160 (62.1%) produced sputum samples on the spot for testing and 490 (22.7%) had smear-positive results. TB prevalence in urban households was 1504 per 100,000 population compared to 4044/100,000 in rural households (P < 0.001) and 2553/100,000 overall. Treatment success was high, with 80.4% cured and 17.6% completing treatment.
DISCUSSION: Lay workers given basic training can conduct active contact investigations and provide treatment support to improve case detection and treatment outcomes in urban and rural areas of Pakistan. In areas with high levels of undiagnosed TB, particularly in rural areas, contact investigation should be prioritised as a means of improving case detection and early diagnosis.
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