COLIFORM COUNTS AND ESCHERICHIA-COLI IN RAW COMMERCIAL MILK FROM DAIRY FARMERS IN KIAMBU DISTRICT, KENYA

The rate of contamination with coliforms and incidence of Escherichia coli (E. coli) in raw milk supplied by farmers to dairy cooperative so cieties for marketing was investigated. About forty two (42.2%) percen t of the milk samples from farmers cans and 10.3% of samples from coop erative cans were found to be free of coliforms, while 89.5% of the sa mples from farmers cans and 50% samples from cooperative cans could be considered to be of good quality with no more than 50,000 coliforms/m l of milk. Forty two E. coli strains were isolated from milk samples, five of which were found to be enteropathogenic, while none was found to be of serogroup 0157. The results indicated that a good number of f armers draw milk under satisfactory conditions, but awareness campaign s on clean milking, milk handling and storage practices should be step ped up in order to reach farmers who may not be informed. Again the st udy showed that raw milk can get contaminated with enteropathogenic st rains of E. coli that can pose a potential risk to humans, thus callin g for extra care when preparing milk and milk products that are to be consumed by human beings.