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ORIGINAL ARTICLE
Year : 2014  |  Volume : 140  |  Issue : 5  |  Page : 649-652

Nucleic acid amplification tests (NAATs) for gonorrhoea diagnosis in women: Experience of a tertiary care hospital in north India


1 Department of Microbiology, All India Institute of Medical Sciences, New Delhi, India
2 Department of Obstetrics and Gynaecology, All India Institute of Medical Sciences, New Delhi, India
3 Department of Dermatology, STD and Leprosy, Dr Ram Manohar Lohia Hospital, New Delhi, India
4 Dermatology and Venereology, All India Institute of Medical Sciences, New Delhi, India

Correspondence Address:
Seema Sood
Department of Microbiology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110 029
India
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Source of Support: None, Conflict of Interest: None


PMID: 25579147

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Background & objectives: Gonorrhoea is among the most frequent of the estimated bacterial sexually transmitted infections (STIs) and has significant health implications in women. The use of nucleic acid amplification tests (NAATs) has been shown to provide enhanced diagnosis of gonorrhoea in female patients. However, it is recommended that an on-going assessment of the test assays should be performed to check for any probable sequence variation occurring in the targeted region. In this study, an in-house PCR targeting opa-gene of Neisseria gonorrhoeae was used in conjunction with 16S ribosomal PCR to determine the presence of gonorrhoea in female patients attending the tertiary care hospitals. Methods: Endocervical samples collected from 250 female patients with complaints of vaginal or cervical discharge or pain in lower abdomen were tested using opa and 16S ribosomal assay. The samples were also processed by conventional methods. Results: Of the 250 female patients included in the study, only one was positive by conventional methods (microscopy and culture) whereas 17 patients were found to be positive based on PCR results. Interpretation & conclusions: The clinical sensitivity of conventional methods for the detection of N. gonorrhoeae in female patients was low. The gonococcal detection rates increased when molecular method was used giving 16 additional positives. Studies should be done to find out other gene targets that may be used in the screening assays to detect the presence of gonorrhoea.


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