title: Comparison of bacterial count in tap water between first burst and running tap water.
abstract: OBJECTIVE
  To compare the number of bacterial counts in tap water at first burst and running tap water.
  
  
  METHODS
  The present study was performed in thirty-two first burst water samples and twenty-nine running tap water samples after two minutes, collected from an operation room at one standard hospital and analyzed for the mean, median, and 95% achieved confidence interval of CFU/ml. All water samples were cultured and investigated for total bacterial counts, which were expressed as colony forming unit per milliliter (CFU/ml).
  
  
  RESULTS
  The bacterial count was statistically significantly about three times higher in the samples of the first burst tap water in comparison with the group of samples after letting the tap water run for two minutes 98.7, 78.5, 60.5-120.0 vs. 29.1, 25.8, 16.6-33.2 CFU/ml.
  
  
  CONCLUSIONS
  Two minutes running tap water contains about three times less bacterial count than first burst tap water
authors.affiliation: Department of Tropical Nutrition and Food Science, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.
authors.forename: Talabporn
authors.initials: T
authors.lastname: Harnroongroj
authors.forename: Amornrat
authors.initials: A
authors.lastname: Leelaporn
authors.forename: Sunee
authors.initials: S
authors.lastname: Limsrivanichayakorn
authors.forename: Srirumpha
authors.initials: S
authors.lastname: Kaewdaeng
authors.forename: Thossart
authors.initials: T
authors.lastname: Harnroongroj
mesh_terms: D060766:Drinking Water / Q000382:microbiology*; D006801:Humans; D009873:Operating Rooms; D013234:Stem Cells; D014871:Water Microbiology
chemical_list: D060766:Drinking Water