Introduction Routine testing for MG in the UK is limited by a lack of assays. New assays are becoming available, with many detecting antimicrobial resistance. We reviewed our use of an MG PCR test, and our treatment of MG, to inform a new, broader testing strategy.
Methods The clinical database was interrogated for all MG requests from November 2016-February 2017. Data collected: demographics, indication, test result, and treatment.
Results 85 samples were sent from 81 individuals: 79 (93%) were male, [39 (49%) MSM]. Indications for testing were: dysuria +/- discharge in 63 (74%), testicular/pelvic pain in 11 (13%), test of cure in 5 (6%), and contacts of infection in 3 (4%). 88% were tested on the second or greater attendance and 22 (26%) had already had received at least two antimicrobial treatments.
18/85 tests (21%) were positive for MG, of whom 17 (94%) had persistent or recurrent urethral discharge +/- dysuria. The remaining case was a female contact of recurrent NGU. Of the 17, 15 (88%) had previously been treated for NGU with azithromycin 1g (6, 40%) or doxycycline (5, 29%) or both (4, 24%). Eleven (61%) were treated with extended azithromycin (despite 5, (45%) having received azithromycin 1g already) and 4 (22%) with moxifloxacin.
Discussion Testing for MG in our service is performed mainly in men with persistent/recurrent NGU. Prevalence of MG in this selected group was high. Despite the likelihood of resistance, many patients received repeat courses of macrolides. Earlier testing for MG may reduce time with symptoms and improve antimicrobial prescribing behaviour.
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