Calculationof Total Coloniesand ColiformGroup Counts, and Detection of Enteric and Related Bacteria from Drinking Water in Indonesia

Total colonies and coliform group from 75 samples of drinking water were counted, and the enteric and the related bacteria were detected in samples from regions of Indonesia in June and July, 1982. We carried out a quantitative test of total colonies and coliform group counts, using URICULT set that houses CLED and MacConkey media. The results of total colonies counts were positive (more than 103/ml) in 43 samples. Eighteen samples out of these 43 samples were taken in Kalimantan, Sulawesi and Sumatra. Fifty-seven samples taken from Jakarta, showed the greatest positive rates: 11 out of 28 samples (39%) from tap water and 14 out of 29 samples (48%) from well water. On the other hand, coliform group counts were positive (more than 102/ml) in 37 samples (49%). Eighteen out of 37 samples were from Kalimantan, Sulawasi and Sumatra. Fifty-seven samples from Jakarta showed positive in 6 out of 28 samples (21%) from tap water and in 13 out of29 samples (45%) from well water. Enteric bacteria and related bacteria found in sample water were primarily Entero- bacter cloacae and Citrobacter freundii. Both species were idetified in 16 samples. The next frequently identified bacteria were Klebsiellapneumoniae and Pseudomonasaeruginosa and they were found in 6 samples. Escherichia coli, important bacteria in relation to fecal matter contamination, was found in 5 samples, including 2 samples of tap water taken in Jakarta city. The most noticeable points in this investigation are that Salmonella Ci group was detected from one well in Jakarta city; Salmonella E1 group from another well in Jakarta city, and each type was also found in wells in Kalimantan, Sulawasi and