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Journal Article
Observational Study
Polymerase Chain Reaction and its Correlation with Clinical Features and Treatment Response in Tubercular Uveitis.
PURPOSE: Correlation of results of polymerase chain reaction for Mycobacterium tuberculosis (MTB PCR) with clinical features and treatment response in tubercular uveitis.
METHODS: Retrospective case study.
RESULTS: Among 56 patients, 31 (55.3%) had acute and 25 (44.6%) had chronic uveitis. Uveitis was unilateral in 40 (71.4%) and bilateral in the remaining 16 (28.6%). Anatomical subtypes of uveitis were: anterior in 10 (13.9%) eyes, intermediate in 9 (12.5%), posterior in 17 (23.6%), and pan uveitis in 36 (50%) eyes. MTB PCR was positive in 24 patients. There was an 80% correlation between clinical response to antitubercular therapy (ATT) and PCR results. Twenty-two patients with positive PCR had a good clinical response. The sensitivity and specificity was 73.3% and 92.3%, respectively.
CONCLUSIONS: The diagnosis of intraocular TB requires strong clinical suspicion with corroborative laboratory and radiological evidence. A positive PCR is reliable whereas negative results should be correlated with clinical features. An adequate response to ATT supports PCR results.
METHODS: Retrospective case study.
RESULTS: Among 56 patients, 31 (55.3%) had acute and 25 (44.6%) had chronic uveitis. Uveitis was unilateral in 40 (71.4%) and bilateral in the remaining 16 (28.6%). Anatomical subtypes of uveitis were: anterior in 10 (13.9%) eyes, intermediate in 9 (12.5%), posterior in 17 (23.6%), and pan uveitis in 36 (50%) eyes. MTB PCR was positive in 24 patients. There was an 80% correlation between clinical response to antitubercular therapy (ATT) and PCR results. Twenty-two patients with positive PCR had a good clinical response. The sensitivity and specificity was 73.3% and 92.3%, respectively.
CONCLUSIONS: The diagnosis of intraocular TB requires strong clinical suspicion with corroborative laboratory and radiological evidence. A positive PCR is reliable whereas negative results should be correlated with clinical features. An adequate response to ATT supports PCR results.
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