Microbiology of middle meatus in chronic rhinosinusitis.
BACKGROUND
Nasal endoscopy allows the collection of middle meatus secretion samples and is an alternative method for determining microorganisms in rhinosinusitis. This study assessed endoscopically collected middle meatus secretions in patients with chronic rhinosinusitis (CRS) and compared those findings with ipsilateral maxillary sinus aspirates and microbiological data of healthy individuals.


METHODS
Middle meatus samples were collected from 114 CRS patients for aerobic, anaerobic, and fungal cultures; maxillary sinus secretions were collected from 13 of these patients. Twenty-three healthy volunteers served as controls.


RESULTS
Aerobes were isolated in 86% of CRS patients, anaerobes were isolated in 8% of CRS patients, and fungi were isolated in 11% of CRS patients; the most frequent microorganisms were Staphylococcus aureus (36%), coagulase-negative Staphylococcus (20%), and Streptococcus pneumoniae (17%). Middle meatus and maxillary sinus cultures presented the same pathogens in 80% of cases. In healthy individuals, coagulase-negative Staphylococcus (56%), S. aureus (39%), and S. pneumoniae (9%) were the most frequent isolates.


CONCLUSIONS
The culture of endoscopically collected middle meatus secretions is effective in identifying microorganisms in CRS patients.
Araujo
Elisabeth
E
Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
Palombini
Bruno C
BC
Cantarelli
Vladimir
V
Pereira
Alexandre
A
Mariante
Afonso
A
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001419:Bacteria / Q000145:classification / Q000302:isolation & purification; D001938:Brazil; D002648:Child; D002675:Child, Preschool; D002908:Chronic Disease; D015169:Colony Count, Microbial; D004198:Disease Susceptibility / Q000382:microbiology; D004352:Drug Resistance, Microbial; D004724:Endoscopy; D005260:Female; D005658:Fungi / Q000145:classification / Q000302:isolation & purification; D006801:Humans; D007962:Leukocytes; D008297:Male; D008443:Maxillary Sinus / Q000382:microbiology / Q000601:surgery; D008875:Middle Aged; D009296:Nasal Cavity / Q000382:microbiology*; D011446:Prospective Studies; D012221:Rhinitis, Allergic, Perennial / Q000382:microbiology* / Q000601:surgery; D012680:Sensitivity and Specificity; D012852:Sinusitis / Q000382:microbiology* / Q000601:surgery; D013223:Statistics as Topic