[Experiment observations of the germicidal effects of disinfectants on Vibro cholerae of El Tor biotype in different water bodies].
OBJECTIVE
To study the germicidal effect of disinfectant on vibro cholerae of El Tor biotype in different water bodies and to set a guidelines for disinfection in the epidemic foci of cholera.


METHODS
The suspension quantitative bactericidal test was used to examine the germicidal effects of four kinds of disinfectants, including Chlorine compound disinfectant, Indophor, Chlorine dioxide and Glutarldehyde, on vibro cholerae of El Tor biotype in waste water from residential areas and hospitals, and water from ditches, rivers and seas.


RESULTS
When germicidal rate for Vibrio Cholerae of El-Tor biotype in the five different kinds of water bodies reached to 100% in five minutes, concentrations of Chlorine compound disinfectant, Indophor, Chlorine dioxide and Glutaraldehyde were 25.0-250.0 mg/L, 100.0-250.0 mg/L, 10.0-25.0 mg/L and 100-500 mg/L, respectively.


CONCLUSIONS
Germicidal effects of the four kinds of disinfectants on Vibrio Cholerae of El-Tor biotype differed, and so did germicidal effect of each of the same disinfectant on it in the five different kinds of water bodies. Concentrations of disinfectants needed to disinfected waste water was higher than that to disinfect natural water.
Chen
Z
Z
Nanshan District Health and Anti-epidemic Station, Shenzhen 518054, China.
Zhang
C
C
Duan
Y
Y
D017606:Chlorine Compounds / Q000494:pharmacology* / Q000627:therapeutic use; D002771:Cholera / Q000517:prevention & control; D004202:Disinfectants / Q000494:pharmacology* / Q000627:therapeutic use; D005976:Glutaral / Q000494:pharmacology / Q000627:therapeutic use; D006801:Humans; D010087:Oxides / Q000494:pharmacology* / Q000627:therapeutic use; D014734:Vibrio cholerae / Q000187:drug effects*; D014871:Water Microbiology / Q000592:standards*; D018508:Water Purification
D017606:Chlorine Compounds; D004202:Disinfectants; D010087:Oxides; C025109:chlorine dioxide; D005976:Glutaral