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Emergence of Antibiotic-Resistant in United States Periodontitis Patients

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Specialty Pharmacology
Date 2023 Nov 24
PMID 37998786
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Abstract

Antibiotic resistance patterns of the major human periodontal pathogen were assessed over a 20-year period in the United States. Subgingival was cultured pre-treatment from 2193 severe periodontitis patients during three time periods: 1999-2000 (936 patients), 2009-2010 (685 patients), and 2019-2020 (572 patients). The clinical isolates were tested for in vitro resistance to 4 mg/L for clindamycin and doxycycline, 8 mg/L for amoxicillin, and 16 mg/L for metronidazole, with a post hoc combination of data for metronidazole plus amoxicillin. Clindamycin-resistant was significantly more prevalent in 2009-2010 (9.1% of patients) and 2019-2020 (9.3%; 15-fold increase) as compared to 1999-2000 (0.6%). resistance to amoxicillin also significantly increased from 0.1% of patients in 1999-2000 to 1.3% in 2009-2010 and 2.8% (28-fold increase) in 2019-2020. resistance to metronidazole, metronidazole plus amoxicillin, and doxycycline was low (≤0.5% prevalence), and statistically unchanged, over the 20-year period. These findings are the first to reveal marked increases over 20 years in clindamycin-resistant and amoxicillin-resistant in United States periodontitis patients. Increased antibiotic resistance of and other periodontitis-associated bacteria threatens the efficacy of periodontal antimicrobial chemotherapy.

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