Detection and analysis on lapactic E. coli in water sources

  Objective   The rule of distribution of lapactic E.coli in different time, seasons and water sources and the distr ibution peculiariy of bacterial type were completely surveyed in order to provide reference basis for corresponding prophy lactico-therapeutic measures.

  Methods   Two sampling spot of water were set up in each main water sources of Liu'an.One share of water in each upper, middle and under was 100 meters away from each other in every spot each month.To detect the distribution of lapactic E.coli in water sources and isolate bacterial strain by bio chemistrical, serological identification and drug sensitivity with five consecutive years.

  Results   149 trains of lapactic E.coli were isolated from 1080 shares of water sources.The positive ratio was 13.80%, detectable ratio of river and pond was 13.61% and 14.17% respectively with no statistical significance(χ²=0.062, P > 0.05).149 strains of lapactic E.coli belonged to 23 seroty pes.One strain of lapactic E.coli of producing H₂S O₁₂₈: K₆₇ was discovered from river water in May, 2000.

  Conclusion   The rule of distribution of lapactic E.coli in water sources was completely brought to light, the distribution peculiarity of bacterial type of lapactic E.coli was made, and EPEC O₁₂₈: K₆₇ producig H₂S was discovered.