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• W2231202912 abstract "BACKGROUND: Peritonsillar abscess is the most common type of deep head and neck tissue abscess and may be associated with a history of antecedent tonsillitis or pharyngitis. It is typically treated by draining the abscess and administering parenteral antibiotics. Reports on the causative microorganisms of peritonsillar abscesses were variable and changed over time. Therefore, this study aimed to investigate the bacteriology, antimicrobial sensitivities, and influence of prior antibiotic treatment on cases of peritonsillar abscess.METHODS: We conducted a retrospective chart review of patients diagnosed with peritonsillar abscesses who admitted to a regional hospital in northern Taiwan between May 2005 and March 2011.RESULTS: Of the 119 patients identified, only 72 abscess cultures were performed which included 41 male (57%) and 31 female (43%). There were 64 culture-positive specimens with 88.9% positive culture rate in our cohort, including pure aerobic isolates in 23.4% of the specimens, pure anaerobic isolates in 32.8%, and mixed aerobic and anaerobic isolates in 43.8%. Forty patients (60%) had received prior oral antibiotic treatment before admission but the mean white blood cell counts and the use of antibiotics did not differ from those without. A non-significantly larger proportion of mixed aerobic and anaerobic isolates was noted in patients who received prior antibiotic treatment (p = 0.49). However, the rates of positive culture, resistant isolates, and duration of hospitalization did not differ significantly between groups. Of the whole 137 isolates, 51.8% were aerobic organisms, and the predominant bacteria included Streptococcus sp. (27.7%), Klebsiella pneumoniae (8.8%), and Haemophilus influenzae (6.6%). Anaerobic isolates constituted 48.2% of the total isolates, and Prevotella sp. (23.4%), Fusobacterium nucleatum (13.1%), and Bacteroides fragilis (7.3%) constituted the predominant isolates. Antimicrobial sensitivity analysis revealed a resistance rate of 37.2% for penicillin, 24.1% for cefazolin, 27.8% for clindamycin, and 8% for amoxicillin-clavulanate.CONCLUSIONS: Peritonsillar abscesses are infections predominantly composed of mixed aerobic and anaerobic bacteria. Immense variations in the bacteriology have been reported in the literature, and these variations warrant further investigation of endemic data as guide to proper use of empirical antibiotics. Prior oral antibiotic treatment may alter the distribution of isolated bacteria, yet our results suggest of no need to alter the selection of empirical antibiotics from that of the standard recommendations, as the recovery was not significantly different. After drainage of the abscess, our results show that the empirical use of first-line antibiotics, such as cefazolin or clindamycin, is as efficacious as that of broad-spectrum antibiotics." @default.
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• W2231202912 date "2012-04-01" @default.
• W2231202912 modified "2023-09-23" @default.
• W2231202912 title "Analysis of the Bacteriology and Antimicrobial Sensitivities of Peritonsillar Abscesses" @default.
• W2231202912 doi "https://doi.org/10.6286/2012.47.2.146" @default.
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