Treatment options for multidrug resistant Acinetobacter baumannii strains (MDR-AB) are limited. Minocycline has been used alone or in combination in the treatment of infections associated with AB. A systematic review of the clinical use of minocycline in nosocomial infections associated with MDR-AB was performed according to the PRISMA-P guidelines. PubMed-Medline, Scopus and Web of Science TM databases were searched from their inception until March 2019. Additional Google Scholar free searches were performed. Out of 2990 articles, 10 clinical studies (9 retrospective case series and 1 prospective single center trial) met the eligibility criteria. In total, 223 out of 268 (83.2%) evaluated patients received a minocycline-based regimen; and 200 out of 218 (91.7%) patients with available data received minocycline as part of a combination antimicrobial regimen (most frequently colistin or carbapenems). Pneumonia was the most common infection type in the 268 cases (80.6% with 50.4% ventilator-associated pneumonia). The clinical and microbiological success rates following minocycline treatment were 72.6% and 60.2%, respectively. Mortality was 20.9% among 167 patients with relevant data. In this systematic review, minocycline demonstrated promising activity against MDR-AB isolates. This review sets the ground for further studies exploring the role of minocycline in the treatment of MDR-AB associated infections.
BackgroundTreatment options for multi-drug-resistant (including extensively and pandrug-resistant) Acinetobacter baumannii strains (herein MDR-AB) are limited. Minocycline, a synthetic tetracycline derivative, has been used alone or in combination in the treatment of infections associated with AB. We systematically reviewed the available clinical evidence regarding its role in the treatment of nosocomial infections caused by MDR-AB isolates in adult patients.MethodsA systematic review of the published literature examining the clinical use of minocycline in nosocomial infections associated with MDR-AB isolates (defined according to ECDC guidance) was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) Guidelines. PubMed, Scopus and Web of Sciences™ databases were searched from their inception until the March 20, 2018. Three researchers individually evaluated the available clinical studies according to predefined inclusion and exclusion criteria. No language restrictions were applied.ResultsOut of 2,576 articles, 9 clinical studies (8 retrospective case series and 1 prospective single-center trial) met the eligibility criteria. In total, 221 out of 265 (83.4%) evaluated adult patients received a minocycline-based antimicrobial regimen and 44 out of 265 (16.6%) received other antimicrobial agents (most frequently aminoglycocides); 198 out of 216 (91.7%) patients with available data, received minocycline as part of an antimicrobial combination regimen (most frequently colistin and carbapenems). Pneumonia was the most prevalent infection (81.5% with 50.4% ventilator associated pneumonias). Clinical and microbiological success rates in the minocycline group were 72.4% and 59.7%, respectively. Mortality rate was 21.2% among 165 patients with relevant data. In the non-minocycline group, clinical and microbiological cure rates were 45.5% and 18.2%, respectively.ConclusionIn this systematic review, minocycline demonstrated promising activity against MDR-AB isolates. This study could set the grounds for further research with large randomized, controlled trials that would explore and establish the role of minocycline in the treatment of MDR-AB-associated infections.Disclosures All authors: No reported disclosures.
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