Water is the most abundant and widely distributed compound on earth. Although in its natural state this compound remains in the purest form, but it is very difficult to find a source of water that has not been disturbed by man. The World Health Organization has estimated that up to 80% of all sickness and disease in the world is caused by inadequate sanitation, polluted water or unavailability of portable water. The incidence of water-borne diseases, such as cholera, typhoid, dysentery and diarrhoeal diseases can be drastically reduced by providing safe drinking water to the people. To get...

Ducks are considered as second widespread species in among poultry following the chickens in Bangladesh and most all over the world. Duck farming is getting popularity day by day as ducks are found relatively resistant to some diseases. But there are many constrains in large scale duck farming in Bangladesh due to inadequate attention in management, diagnosis, control and prevention of various infectious diseases, which play a vital role in high morbidity and mortality of ducks. Duck cholera occurs as a relatively common disease, recorded in worldwide including Bangladesh and outbreaks mainly...