Introdução: A microbiologia nasossinusal de indivÃduos sadios é pouco documentada. Seu conhecimento permite a determinação
dos agentes colonizantes nasossinusais e a monitoração dos padrões de resistência bacteriana.
Objetivos: Determinar a microbiologia do meato médio em indivÃduos sadios e compará-la com a de pacientes com
rinossinusite crônica.
Método: Foram incluÃdos 61 indivÃduos sadios. As amostras foram coletadas sob visão endoscópica e submetidas a exame
de Gram com contagem leucocitária e cultura para aeróbios, anaeróbios e fungos. 114 pacientes com rinossinusite
crônica constituÃram o grupo controle.
Resultados: Nos indivÃduos sadios foram isolados 58 microorganismos, sendo os mais prevalentes Staphylococcus coagulasenegativos,
Staphylococcus e Corynebacterium. Fungos foram cultivados em 10%.Todas as amostras apresentaram
leucócitos raros ou ausentes. Identificou-se resistência à penicilina em 75% dos Staphylococcus aureus e 69%
dos Staphylococcus coagulase-negativos. Quanto à oxacilina, 100% dos Staphylococcus aureus e 92% dos
Staphylococcus coagulase-negativos foram sensÃveis. No grupo controle foram cultivados 158 microorganismos.
Os mais freqüentes foram Staphylococcus aureus e coagulase-negativos. Os Gram-negativos representaram 26%
dos aeróbios. Entre as amostras com cultura positiva, 73% apresentavam alguns ou numerosos leucócitos.
Conclusão: Ausência ou raridade de leucócitos, Staphylococcus coagulase-negativos e Corynebacterium foram mais freqüentes
em sadios, e Streptococcus pneumoniae, anaeróbios, Staphylococcus coagulase-negativos oxacilinoresistentes
e Gram-negativos mais freqüentes no grupo controle.
Introduction: The nasosinusal microbiology of healthy individuals is not much documented. Its knowledge allows to determine
the nasosinusal colonizing agents and to monitor the patterns of bacterial resistance.
Objective: To evaluate the microbiology of the middle meatus in healthy individuals and to compare it with that of patients
with chronic rhinosinusitis.
Method: 61 healthy individuals were included. The samples were collected under endoscopic view and Gram stained
with leucocytes count and aerobic, anaerobic and fungus cultures. 114 patients with chronic rhinosinusitis
formed the control group.
Results: In healthy individuals 58 microorganisms were isolated. The most frequent ones were coagulase-negative
Staphylococcus, Staphylococcus and Corynebacterium. Fungi were cultivated in 10%. There were rare or no
white blood cells in all samples. There was penicillin resistance in 75% of the Staphylococcus aureus and 69%
of the coagulase-negative Staphylococcus. As for oxacillin, 100% of Staphylococcus aureus and 92% of coagulasenegative
Staphylococcus were sensitive. In the control group 158 microorganisms were cultivated. The most
common ones were Staphylococcus aureus and coagulase-negative Staphylococcus. Gram-negatives represented
26% of the aerobics. 73% of the samples with positive cultures presented a few or many white blood cells.
Conclusion: Rare or no white blood cell, coagulase-negative Staphylococcus and Corynebacterium were more frequent in
healthy individuals and Streptococcus pneumoniae, anaerobics and oxacillin resistant coagulase-negative
Staphylococcus and Gram-negative were more frequent in the control group.
