Nasopharyngeal colonization by Haemophilus influenzae in children attending day-care centers, in Ribeirão Preto, State of São Paulo, Brazil

Brazilian Journal of Microbiology

Maria E.n. Bonifácio Da Silva²  Paulo Da Silva¹  Marta I.c. Medeiros¹  Suzel N. Neme¹  Claudia Macedo¹  José Moacir Marin¹ 

[1] ,Universidade de São Paulo Faculdade de Ciências Farmacêuticas de Ribeirão Preto Laboratório de Análises ClínicasRibeirão Preto SP ,Brasil

关键词: Haemophilus influenzae;    day-care center;    Hib colonization;    Hib vaccination;    Haemophilus influenzae;    creches;    colonização por Hib;    antiHib vacinação;   

DOI  :  10.1590/S1517-83822006000100006

来源: SciELO

【 摘 要 】

Nasopharyngeal carriage of Haemophilus influenzae (Hi) was studied in 114 healthy children < 3 years old, attending day-care centers (DCCs) in Ribeirão Preto, State of São Paulo, Brazil. Biotype, serotype (by specific antisera and PCR) and antibiotic susceptibility to 14 antibiotics of each isolate were determined. Carriage rates of Hi were 72.0%. Isolates belonged to biotype II (36.5%), I (21.5%), V (18.2%) and III (16.1%). The prevalence of encapsulated Hi carriers was 3.2% for type f, 1.0% for type b, 1.0% for type d and 1.0% for type e. Resistances to trimethoprim-sulphamethoxazole and ampicillin were 46.2% and 10.7% respectively. Multidrug resistance was found in 14 (15.0%) of the isolates tested. Among the isolates, 13.9% were beta-lactamase producers; there were no beta-lactamase negative ampicillin resistant isolates. DCCs are niches with a high potential for the spread of microorganisms and should be continuously monitored to detect elimination or replacement of H. influenzae type b colonization.

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