Polycystic kidney disease can cause abdominal pain, headaches, and pain in the sides and back. Porphyria is a condition that can affect the nerves and skin, making the skin extremely sensitive to sunlight. Hydronephrosis is a condition of the kidneys and causes aching or pain, urinary symptoms, fever, and nausea.
Protozoan infections are parasitic diseases caused by organisms formerly classified in the Kingdom Protozoa. They include organisms classified in Amoebozoa, Excavata, and Chromalveolata. Examples include Entamoeba histolytica, Plasmodium (some of which cause malaria), and Giardia lamblia. Trypanosoma brucei, transmitted by the tsetse fly and the cause of African sleeping sickness, is another example.
Follow Following Unfollow Pending Disabled. A Honor Society of Nursing (STTI) answered. Protozoan infections are caused by single-celled parasites called protozoa. When these parasites are introduced to the body they multiply, interfere with the body's normal functioning, and cause damage to vital organs. Protozoa usually enter the body either through an insect bite or through infected food or water.