Ciguatera fish poisoning (or ciguatera) is an illness caused by eating fish that contain toxins produced by a marine microalgae called Gambierdiscus toxicus. Cholera is the only bacterial disease exclusively attributable to water pollution. According to the World Health Organization (WHO), diarrhoea accounts for most of the water-related disease burden worldwide. It is mainly caused by cholera, typhoid fever, shigella, EHEC (Escherichia Coli) and Hepatitis A. (u>uiui.u)ho.int/gho/phe/u>ater_sanitation/burden_text/en/index.html).