Reema Bansal1, Kusum Sharma2, Amod Gupta3, Aman Sharma4, Mini P Singh5, Vishali Gupta1, Samyak Mulkutkar1, Mohit Dogra1, Mangat R Dogra1, Shivali Kamal1, Surya Parkash Sharma1, Paul D Fiorella6. 1. Advanced Eye Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India. 2. Department of Microbiology, Post Graduate Institute of Medical Education and Research, Chandigarh, India. 3. Advanced Eye Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India. Electronic address: dramodgupta@gmail.com. 4. Department of Internal Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh, India. 5. Department of Virology, Post Graduate Institute of Medical Education and Research, Chandigarh, India. 6. Bureau of Health Laboratories, Jacksonville, Florida.
Abstract
PURPOSE: To compare 3 different molecular techniques to detect the Mycobacterium tuberculosis genome in vitreous fluid of eyes with multifocal serpiginoid choroiditis (MSC). DESIGN: Prospective, interventional case series. PARTICIPANTS: Eleven patients (11 eyes) with active MSC in at least 1 eye underwent diagnostic pars plana vitrectomy (PPV) between October 2012 and December 2013. METHODS: Vitreous fluid samples were subjected to multitargeted polymerase chain reaction (PCR) for a M. tuberculosis assay, the Gene Xpert MTB/RIF assay (Cepheid, Sunnyvale, CA), and a line probe assay (GenoType MTBDRplus; Hain Lifescience, GmbH, Nehren, Germany). The samples with positive results were subjected to rpoB gene sequencing to demonstrate rifampicin resistance. The clinical details, digital fundus imaging, and treatment details and outcomes also were noted. MAIN OUTCOME MEASURES: Detection of the M. tuberculosis genome and rifampicin resistance in the vitreous samples. RESULTS: Of the 11 eyes subjected to PPV, the multitargeted PCR results for tuberculosis were positive for 10 eyes, the MTBDRplus assay results were positive in 6 eyes, and the Gene Xpert MTB/RIF assay results were positive in 4 eyes. Rifampicin resistance was detected in 3 eyes by rpoB gene sequencing, in 3 eyes by the MTBDRplus assay, and in 1 eye by the Gene Xpert MTB/RIF assay. CONCLUSIONS: We detected the M. tuberculosis genome in the vitreous fluid of eyes with MSC using 3 different molecular techniques. Rifampicin resistance was detected for the first time in eyes with MSC.
PURPOSE: To compare 3 different molecular techniques to detect the Mycobacterium tuberculosis genome in vitreous fluid of eyes with multifocal serpiginoid choroiditis (MSC). DESIGN: Prospective, interventional case series. PARTICIPANTS: Eleven patients (11 eyes) with active MSC in at least 1 eye underwent diagnostic pars plana vitrectomy (PPV) between October 2012 and December 2013. METHODS: Vitreous fluid samples were subjected to multitargeted polymerase chain reaction (PCR) for a M. tuberculosis assay, the Gene Xpert MTB/RIF assay (Cepheid, Sunnyvale, CA), and a line probe assay (GenoType MTBDRplus; Hain Lifescience, GmbH, Nehren, Germany). The samples with positive results were subjected to rpoB gene sequencing to demonstrate rifampicin resistance. The clinical details, digital fundus imaging, and treatment details and outcomes also were noted. MAIN OUTCOME MEASURES: Detection of the M. tuberculosis genome and rifampicin resistance in the vitreous samples. RESULTS: Of the 11 eyes subjected to PPV, the multitargeted PCR results for tuberculosis were positive for 10 eyes, the MTBDRplus assay results were positive in 6 eyes, and the Gene Xpert MTB/RIF assay results were positive in 4 eyes. Rifampicin resistance was detected in 3 eyes by rpoB gene sequencing, in 3 eyes by the MTBDRplus assay, and in 1 eye by the Gene Xpert MTB/RIF assay. CONCLUSIONS: We detected the M. tuberculosis genome in the vitreous fluid of eyes with MSC using 3 different molecular techniques. Rifampicin resistance was detected for the first time in eyes with MSC.
Authors: K Sharma; A Gupta; M Sharma; A Sharma; R Singh; K Aggarwal; R Bansal; A Thakur; S Prakash; V Gupta Journal: Eye (Lond) Date: 2017-10-20 Impact factor: 3.775
Authors: Erika Marie Damato; Sarah Dawson; Xiaoxuan Liu; Chandoshi Mukherjee; John Horsburgh; Alastair K Denniston; Edward Moran; Martin Dedicoat; Philip Ian Murray Journal: J Ophthalmic Inflamm Infect Date: 2017-12-04