title: Bacteriology of postradiotherapy chronic rhinosinusitis in nasopharyngeal carcinoma patients and chronic rhinosinusitis.
abstract: The purpose of this study was to investigate and compare the bacteriology of postradiotherapy chronic rhinosinusitis (postRT-CRS) and chronic rhinosinusitis (CRS) by evaluating the aspiration materials of the maxillary sinus of patients with postRT-CRS and patients with CRS. We collected the secretions of the maxillary sinus from 30 nasopharyngeal carcinoma patients with postRT-CRS and 30 patients with CRS for aerobe/facultative anaerobe bacteria culture. The most common isolates in the postRT-CRS group were Streptococcus viridans, Staphylococcus aureus and Haemophilus influenzae, while those in the CRS group were Haemophilus influenzae, Pseudomonas aeruginosa and Staphylococcus aureus. Isolated gram-positive coccus rate in postRT-CRS patients was significantly higher than in CRS patients (62.50% compared with 30.00%, respectively; P < 0.05), and isolated gram-negative bacilli rate in postRT-CRS patients was significantly lower than in CRS patients (31.25% compared with 70.00%, respectively; P < 0.05). However, the incidence of positive cultures was not significantly different between the postRT-CRS group and the CRS group (P > 0.05). This study found that there were some differences in bacteriology between postRT-CRS and CRS. Gram-positive coccus was the predominant aerobic/facultative anaerobe pathogenic bacterium in patients with postRT-CRS, and gram-negative bacilli was predominant in CRS patients.
authors.affiliation: Department of Otorhinolaryngology and Head and Neck Surgery, First Affiliated Hospital of Guangxi Medical University, 22 Shuangyong Road, 530021, Nanning, Guangxi, China. jordandzy@hotmail.com
authors.forename: Ze-Yi
authors.initials: ZY
authors.lastname: Deng
authors.forename: An-Zhou
authors.initials: AZ
authors.lastname: Tang
mesh_terms: D000328:Adult; D000368:Aged; D001419:Bacteria / Q000302:isolation & purification*; D002908:Chronic Disease; D005260:Female; D006801:Humans; D008297:Male; D008443:Maxillary Sinus / Q000382:microbiology; D008875:Middle Aged; D009297:Nasal Mucosa / Q000528:radiation effects; D009303:Nasopharyngeal Neoplasms / Q000150:complications / Q000382:microbiology* / Q000532:radiotherapy*; D012220:Rhinitis / Q000150:complications / Q000382:microbiology*; D012852:Sinusitis / Q000150:complications / Q000382:microbiology*; D055815:Young Adult