Background:Trachoma results from repeated episodes of conjunctival infection with Chlamydia trachomatis and is the leading infectious cause of *** eliminate trachoma,control programmes use the SAFE strategy(Surgery,An...
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Background:Trachoma results from repeated episodes of conjunctival infection with Chlamydia trachomatis and is the leading infectious cause of *** eliminate trachoma,control programmes use the SAFE strategy(Surgery,Antibiotics,Face cleanliness,and Environmental improvement).The A component is designed to treat C trachomatis infection,and is initiated on the basis of the prevalence of the clinical sign trachomatous inflammation-follicular(TF).Unfortunately,TF correlates poorly with C trachomatis *** sought to assess a newly developed point-of-care(POC)assay compared with presence of TF for guiding the use of antibiotics for trachoma ***:We compared performance outcomes of the POC assay and presence of TF using commercial PCR as a comparator in 664 children aged 1-9 years in remote,trachoma-endemic villages in *** of trachoma were graded according to the WHO simplified trachoma grading ***:Of 664 participants,128(19%)were positive for ocular C trachomatis infection by *** of TF had a sensitivity of 64.1%(95% CI 55.8-72.4),specificity of 80.2%(76.8-83.6),and positive predictive value of 43.6%(36.5-50.7).By contrast,the POC assay had a sensitivity of 83.6%(77.2-90.0),specificity of 99.4%(98.8-100.0),and positive predictive value of 97.3%(94.2-100.3).Interagreements and intra-agreements between four novice operators were 0.988(0.973-1.000)and 0.950(0.894-1.000),***:The POC assay is substantially more accurate than TF prevalence in identifying the presence or absence of *** studies should assess the use of the assay in the planning and monitoring of trachoma control activities.
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