title: Subgingival occurrence and antimicrobial susceptibility of enteric rods and pseudomonads from Brazilian periodontitis patients.
abstract: The occurrence and in vitro antimicrobial sensitivity of isolates of enteric rods and pseudomonads were examined in 80 periodontitis patients, 17 to 58 years of age, in São Paulo, Brazil. Speciation and in vitro antimicrobial susceptibility testing were performed using the BBL Crystal enteric/nonfermenter system and the Etest for amoxicillin/clavulanic acid, ciprofloxacin and doxycycline. A total of 30 strains were isolated from 25 (31.2%) of the study subjects. Pseudomonas aeruginosa occurred in nine patients, Serratia marcescens in seven, and five other species were recovered in lower prevalence. All study organisms demonstrated high susceptibility to ciprofloxacin but exhibited variable susceptibility patterns to the other antimicrobial agents tested. In conclusion, the high occurrence of enteric rods and pseudomonads in these subjects may be important in the pathogenesis of periodontitis, and ciprofloxacin might be the antibiotic of choice to eradicate these pathogens from periodontal pockets.
authors.affiliation: Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, Brazil.
authors.forename: F C
authors.initials: FC
authors.lastname: Barbosa
authors.forename: M P
authors.initials: MP
authors.lastname: Mayer
authors.forename: E
authors.initials: E
authors.lastname: Saba-Chujfi
authors.forename: S
authors.initials: S
authors.lastname: Cai
mesh_terms: D000293:Adolescent; D000328:Adult; D019980:Amoxicillin-Potassium Clavulanate Combination / Q000494:pharmacology; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D000890:Anti-Infective Agents / Q000494:pharmacology; D001938:Brazil; D002939:Ciprofloxacin / Q000494:pharmacology; D004318:Doxycycline / Q000494:pharmacology; D004359:Drug Therapy, Combination / Q000494:pharmacology; D004755:Enterobacteriaceae / Q000187:drug effects* / Q000302:isolation & purification; D005260:Female; D006801:Humans; D008297:Male; D008826:Microbial Sensitivity Tests; D008875:Middle Aged; D010514:Periodontal Pocket / Q000382:microbiology*; D010518:Periodontitis / Q000382:microbiology; D011549:Pseudomonas / Q000187:drug effects* / Q000302:isolation & purification
chemical_list: D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D002939:Ciprofloxacin; D019980:Amoxicillin-Potassium Clavulanate Combination; D004318:Doxycycline