Sanitary toilets can decrease incidence of all except
Diarrhoea
Poliomyelitis
Malaria
Cholera
Diarrhea, Poliomyelitis, and cholera are transmitted by faeco-oral route Malaria is a vector-borne disease transmitted by Anopheles mosquito. Hence sanitary toilets and hand washing practices cannot prevent Malaria. Park's Textbook of Preventive and Social Medicine, 25th Edition, Pg 831
Environment and health