کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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3348372 | 1216010 | 2007 | 6 صفحه PDF | دانلود رایگان |

To evaluate traditional colony-based examinations of diarrheagenic Escherichia coli (DEC), we analyzed the proportions of 5 categories of DEC among E. coli in stool specimens from patients with gastroenteritis using real-time polymerase chain reaction with novel primers and probes. Among 81 DEC isolates, 48 (59.3%) were present at proportions of ≤10%, whereas only 17 (21.0%) reached >50%. Low concentrations (≤10%) of DEC were found, particularly in most (71.8%) stool specimens collected within 48 h after the onset of illness, although such specimens were conventionally collected as close to the time of diarrhea onset as possible. Because the probability of detecting ≤10% DEC by colony-based examinations is very low, traditional laboratory methods might not detect most DEC infections, especially at the start of gastroenteritis. Thus, a diagnosis of DEC infections requires a molecular method that targets not individual colonies but E. coli clusters.
Journal: Diagnostic Microbiology and Infectious Disease - Volume 58, Issue 3, July 2007, Pages 303–308