title: Evaluation of repetitive extragenic palindromic-PCR for discrimination of fecal Escherichia coli from humans, and different domestic- and wild-animals.
abstract: The objective of this study was to investigate the potential of repetitive extragenic palindromic anchored polymerase chain reaction (rep-PCR) in differentiating fecal Escherichia coli isolates of human, domestic- and wild-animal origin that might be used as a molecular tool to identify the possible source(s) of fecal pollution of source water. A total of 625 fecal E. coli isolates of human, 3 domestic- (cow, dog and horse) and 7 wild-animal (black bear, coyote, elk, marmot, mule deer, raccoon and wolf) species were characterized by rep-PCR DNA fingerprinting technique coupled with BOX A1R primer and discriminant analysis. Discriminant analysis of rep-PCR DNA fingerprints of fecal E. coli isolates from 11 host sources revealed an average rate of correct classification of 79.89%, and 84.6%, 83.8%, 83.3%, 82.5%, 81.6%, 80.8%, 79.8%, 79.3%, 77.4%, 73.2% and 63.6% of elk, human, marmot, mule deer, cow, coyote, raccoon, horse, dog, wolf and black bear fecal E. coli isolates were assigned to the correct host source. These results suggest that rep-PCR DNA fingerprinting procedures can be used as a source tracking tool for detection of human- as well as animal-derived fecal contamination of water.
authors: Water and Watershed Research Program, Department of Biology, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia, Canada. bmohapat@uvic.ca
authors: Bidyut R
authors: BR
authors: Mohapatra
authors: Klaas
authors: K
authors: Broersma
authors: Rick
authors: R
authors: Nordin
authors: Asit
authors: A
authors: Mazumder
mesh_terms: D000818:Animals; D000829:Animals, Domestic / Q000382:microbiology*; D000835:Animals, Wild / Q000382:microbiology*; D016172:DNA Fingerprinting / Q000379:methods; D004926:Escherichia coli / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D005243:Feces / Q000382:microbiology*; D006801:Humans; D016133:Polymerase Chain Reaction / Q000379:methods; D012091:Repetitive Sequences, Nucleic Acid; D014871:Water Microbiology; D014873:Water Pollutants
chemical_list: D014873:Water Pollutants