Multiple choice Which one of the following is a protozoan disease? Typhoid Malaria Night blindness Ringworm Reveal answer Fill a bubble to check yourself B Correct answer Explanation Malaria is caused by protozoan parasites of the Plasmodium genus, transmitted by Anopheles mosquitoes. Typhoid is bacterial, Night blindness is from vitamin A deficiency, and Ringworm is a fungal infection - none are protozoan.