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2009, Number 1

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Rev Med Inst Mex Seguro Soc 2009; 47 (1)

Spread of S. pyogenes to the Caretakers and Relatives from Nasopharyngeal Carrier Children Attended in a Day Care Center

Quiñonez-Alvarado MG, Villaseñor-Sierra A

Language: Spanish
References: 29
Page: 83-88
PDF size: 210.51 Kb.


ABSTRACT

Objective: to evaluate the prevalence of nasopharyngeal S. pyogenes (SP) carriers among children attending a day care center (DCC) and the spread of specific clones (SC) among caretakers and relatives.
Methods: nasopharyngeal cultures were performed in children with SP positive culture (306), family members (51) and caretakers (73) at time-0, four and seven months later. Differences among SP strains were determined. Descriptive statistics and Fisher exact test were performed.
Results: SP prevalence in carrier children, caretakers and relatives was 10, 0 and 4 %. Three pairs of children, from two different classrooms, shared SP strains SC I, II and III. A clone VII was isolated from a relative. In the second survey, the SP prevalence was 4, 0 and 0 %. Two classmates shared clone I and other two from a different classroom shared clone V. In the third, the prevalence was 2, 4 and 14 %. Strains of clones II and VII were isolated from children. A sister of one child, who did not attend to DCC, was a carrier of clone II found in her brother. Clone III was isolated in one caretaker.
Conclusions: the SP carrier prevalence was similar to other reports. The sharing of identical clones of SP was found among children in close physical contact.


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