In contemporary times, people have come to realize the importance of vegetables as rich source of vitamins and minerals which aid to protect their body against infection and diseases. This knowledge has increased the demand of both exotic and indigenous vegetables in the cities as such any available space in the cities has become a major farming centre for vegetable producers. On the other hand, there has been an increasing incidence of food borne diseases which is link to enteric pathogenic micro organisms found in fecal material and for that matter waste water. It implies that there might...