1636. Antibiotic Treatment of Human Plague: A Systematic Literature Review of Worldwide Cases, 1937–2016

Abstract Background Yersinia pestis remains endemic in countries throughout Africa, Asia, and the Americas and is a tier 1 bioterrorism agent. Antibiotic treatment with aminoglycosides such as streptomycin or gentamicin is effective when initiated early in the course of illness but can have serious side effects. Alternatives such as fluoroquinolones, tetracyclines, and sulfonamides are potentially safer but currently lack robust human data on their efficacy. Methods We searched PubMed Central, Medline, Embase, CINAHL, and other databases for articles in any language with terms related to plague, Yersinia pestis, and antibiotics. Articles that contained case-level information on antibiotic treatment and patient outcome were included. We abstracted information related to patient demographics, clinical features of plague, treatment, and survival using a standardized form. Results Among 4,874 articles identified and screened, we found 723 published cases of treated plague reported between 1937 and 2016. Fifty-two percent of patients were male; median age was 22 years (range: 8 days-80 years). Cases were most commonly reported from the United States (21%), India (13%), China (11%), Vietnam (10%), and Madagascar (10%). Overall, the case fatality rate was 21%. The majority of patients had primary bubonic (64%), pneumonic (21%), or septicemic (4%) plague, of which survival was 83%, 71%, and 55%, respectively. Among those treated with an aminoglycoside (n = 386, 53%), survival was 86%. Among those treated with a tetracycline (n = 145, 20%), fluoroquinolone (n = 45, 6%), or sulfonamide (n = 311, 43%), survival was 90%, 84%, and 77%, respectively. Survival rates did not substantially differ between patients treated with one vs. two classes of antibiotics (table). Conclusion Published cases of treated plague offer an opportunity to evaluate the treatment efficacy of different antibiotic classes. In addition to aminoglycosides, tetracyclines, fluoroquinolones, and sulfonamides appear to be effective for plague treatment, although publication bias and low numbers in certain treatment groups may limit interpretation. Disclosures All authors: No reported disclosures.