India, Jan. 4 -- A team of scientists from the National Institute of Bacteriology, Kolkata, on Sunday began collecting water and stool samples from people who fell ill after consuming contaminated drinking water in Indore for a detailed investigation into the bacteria involved, officials said.

More than a week after residents of Bhagirathpura in Indore fell ill from consuming contaminated water, test reports of water samples on Saturday confirmed that tap water was a cocktail of deadly pathogens - including E. coli, Salmonella and Vibrio cholerae bacteria, along with viruses, fungi and protozoa - causing polymicrobial infections that led to multi-organ failure and sepsis among patients, officials said.

At least 10 people have died and 2...