1887

Abstract

Eighteen reference strains of were differentiated by PCR- and nested PCR-based RFLP analysis, using two restriction digestions, one with I and the other with the three enzymes II, RI and fI. I digestion allowed the differentiation of 12 different profiles after CT1/CT5 PCR and 13 different profiles after the nested PCR. The triple hydrolysis permitted the identification of 15 different patterns. In all, 16/18 reference strains were clearly identified. These reference patterns were successfully used to genotype 34 of 35 (28 strains and 7 clinical specimens) samples from infected students, collected during a screening programme in Yaounde (Cameroon). Genotypes D, Da, E, F, G and J were found. The most prevalent genotype was E ( = 14; 40 %), followed by F ( = 7; 20 %). As RFLP patterns of reference strains are essential for typing clinical isolates, they will greatly facilitate characterization in many resource-limited laboratories.

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2004-01-01
2024-12-07
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