Water might be the most possible item through which bacteria entered inside the body. Name of the bacteria is Escherichia coli which is an enteric bacteria enters into body through contaminated food and water. Normally MacConkey agar media is used to isolate and culture from negative enteric bacteria. As E-coli is also an enteric bacteria this media is suitable. E.coli cause UTI related problems , intestinal problems. Solution Water might be the most possible item through which bacteria entered inside the body. Name of the bacteria is Escherichia coli which is an enteric bacteria enters into body through contaminated food and water. Normally MacConkey agar media is used to isolate and culture from negative enteric bacteria. As E-coli is also an enteric bacteria this media is suitable. E.coli cause UTI related problems , intestinal problems..