Daniel Schröder, Thitima Cherdtrakulkiat, Le Huu Doanh, Daniel Golparian, Lon Say Heng, Irving Hoffman, Susanne Jacobsson, Manuel C Jamoralin, Francis Kakooza, Rossaphorn Kittiyaowamarn, Peter Kyambadde, Venessa Maseko, Mitch Matoga, Etienne Müller, Thuy Thi Phan Nguyen, Vichea Ouk, Vivi Setiawaty, Sonia B Sia, Verawati Sulaiman, Mot Virak, Nguyen Thi Thuy Van, Teodora Wi, Ismael Maatouk, Magnus Unemo
{"title":"Exceedingly high levels of tetracycline resistance in Neisseria gonorrhoeae in eight WHO Enhanced Gonococcal Antimicrobial Surveillance Programme countries in three WHO regions, 2021-2024-doxycycline post-exposure prophylaxis will unlikely impact gonorrhoea burdens.","authors":"Daniel Schröder, Thitima Cherdtrakulkiat, Le Huu Doanh, Daniel Golparian, Lon Say Heng, Irving Hoffman, Susanne Jacobsson, Manuel C Jamoralin, Francis Kakooza, Rossaphorn Kittiyaowamarn, Peter Kyambadde, Venessa Maseko, Mitch Matoga, Etienne Müller, Thuy Thi Phan Nguyen, Vichea Ouk, Vivi Setiawaty, Sonia B Sia, Verawati Sulaiman, Mot Virak, Nguyen Thi Thuy Van, Teodora Wi, Ismael Maatouk, Magnus Unemo","doi":"10.1093/jac/dkaf066","DOIUrl":null,"url":null,"abstract":"<p><strong>Objectives: </strong>Doxycycline post-exposure prophylaxis (doxycycline-PEP) can reduce incident cases of syphilis, chlamydia and possibly gonorrhoea especially among men who have sex with men with recent bacterial sexually transmitted infections (STIs). Owing to potential implementation of doxycycline-PEP internationally, global tetracycline/doxycycline resistance data for contemporary Neisseria gonorrhoeae isolates has become imperative. We report tetracycline resistance data for gonococcal isolates (n = 2993) from eight WHO Enhanced Gonococcal Antimicrobial Surveillance Programme (EGASP) countries in three WHO regions in 2021-2024, i.e. to estimate potential impact of doxycycline-PEP on the incident gonorrhoea cases in these WHO EGASP countries.</p><p><strong>Methods: </strong>WHO EGASP isolates cultured from men with urethral discharge in Cambodia (n = 482), Indonesia (n = 101), Malawi (n = 121), The Philippines (n = 843), South Africa (n = 597), Thailand (n = 250), Uganda (n = 350) and Vietnam (n = 249) in 2021-2024 were examined. MICs (mg/L) of tetracycline were determined using Etest.</p><p><strong>Results: </strong>The tetracycline resistance (range) using the current EUCAST (MIC > 0.5 mg/L) and CLSI (MIC > 1 mg/L) clinical resistance breakpoints in the eight WHO EGASP countries was 92.2% (83.5%-99.6%) and 80.6% (66.3%-98.6%), respectively. Using a previous minocycline-PEP resistance breakpoint (MIC > 2 mg/L) and breakpoint for high-level plasmid (tetM)-mediated tetracycline resistance (MIC > 8 mg/L), the tetracycline resistance (range) was 77.3% (47.4%-98.6%) and 74.3% (31.3%-98.6%), respectively.</p><p><strong>Conclusions: </strong>The exceedingly high levels of gonococcal tetracycline resistance (independent of resistance breakpoint used) in the eight WHO EGASP countries elucidate that doxycycline-PEP will unlikely significantly reduce the gonorrhoea cases in these countries. Furthermore, doxycycline-PEP might rapidly select for additional gonococcal strains with tetracycline resistance (low- and high-level) and MDR/XDR strains, i.e. because these strains are mostly resistant to tetracycline.</p>","PeriodicalId":14969,"journal":{"name":"Journal of Antimicrobial Chemotherapy","volume":" ","pages":""},"PeriodicalIF":3.9000,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Antimicrobial Chemotherapy","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1093/jac/dkaf066","RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"INFECTIOUS DISEASES","Score":null,"Total":0}
Exceedingly high levels of tetracycline resistance in Neisseria gonorrhoeae in eight WHO Enhanced Gonococcal Antimicrobial Surveillance Programme countries in three WHO regions, 2021-2024-doxycycline post-exposure prophylaxis will unlikely impact gonorrhoea burdens.
Objectives: Doxycycline post-exposure prophylaxis (doxycycline-PEP) can reduce incident cases of syphilis, chlamydia and possibly gonorrhoea especially among men who have sex with men with recent bacterial sexually transmitted infections (STIs). Owing to potential implementation of doxycycline-PEP internationally, global tetracycline/doxycycline resistance data for contemporary Neisseria gonorrhoeae isolates has become imperative. We report tetracycline resistance data for gonococcal isolates (n = 2993) from eight WHO Enhanced Gonococcal Antimicrobial Surveillance Programme (EGASP) countries in three WHO regions in 2021-2024, i.e. to estimate potential impact of doxycycline-PEP on the incident gonorrhoea cases in these WHO EGASP countries.
Methods: WHO EGASP isolates cultured from men with urethral discharge in Cambodia (n = 482), Indonesia (n = 101), Malawi (n = 121), The Philippines (n = 843), South Africa (n = 597), Thailand (n = 250), Uganda (n = 350) and Vietnam (n = 249) in 2021-2024 were examined. MICs (mg/L) of tetracycline were determined using Etest.
Results: The tetracycline resistance (range) using the current EUCAST (MIC > 0.5 mg/L) and CLSI (MIC > 1 mg/L) clinical resistance breakpoints in the eight WHO EGASP countries was 92.2% (83.5%-99.6%) and 80.6% (66.3%-98.6%), respectively. Using a previous minocycline-PEP resistance breakpoint (MIC > 2 mg/L) and breakpoint for high-level plasmid (tetM)-mediated tetracycline resistance (MIC > 8 mg/L), the tetracycline resistance (range) was 77.3% (47.4%-98.6%) and 74.3% (31.3%-98.6%), respectively.
Conclusions: The exceedingly high levels of gonococcal tetracycline resistance (independent of resistance breakpoint used) in the eight WHO EGASP countries elucidate that doxycycline-PEP will unlikely significantly reduce the gonorrhoea cases in these countries. Furthermore, doxycycline-PEP might rapidly select for additional gonococcal strains with tetracycline resistance (low- and high-level) and MDR/XDR strains, i.e. because these strains are mostly resistant to tetracycline.
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The Journal publishes articles that further knowledge and advance the science and application of antimicrobial chemotherapy with antibiotics and antifungal, antiviral and antiprotozoal agents. The Journal publishes primarily in human medicine, and articles in veterinary medicine likely to have an impact on global health.
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