Stock Photo: SALMONELLOSIS, BILHARZIASIS. SALMONELLOSIS, BILHARZIASIS Man can be infected by parasites living in fresh water. Here, after migrating through the body, a larva of a water fluke called Schistosoma bilharziasis has developed into an adult and deposited a large spiked egg in the bladder, leading to chronic irritation and inflammation. The diseased bladder is then more susceptible to infection by common germs such as the Salmonella seen here. SEM 7800x.