when 23 healthy native southwestern colombian men were studied to determine the prevalence of enterobacteriaceae in the jejunal microflora in a sample of thoroughly evaluated tropical inhabitants who were normal by physical examination , chest x-ray , and medical history , 14 of the 23 proved to be enterobacteriaceae-positive , with counts of 10 ( 3 ) to 10 ( 9 ) per milliliter of jejunal aspirate .
C0220825
evaluated
C0031809
physical