The question asks for a protozoan disease that is not included in the given options. Protozoan diseases are caused by single-celled organisms called protozoa. Let`s analyze each option to determine if it is a protozoan disease or not:

Option 1: Elephantiasis - This is not a protozoan disease. Elephantiasis is caused by parasitic worms, specifically the filarial worms transmitted by mosquito bites. Therefore, this option is a valid answer to the question.

Option 2: Oriental sores - This is a protozoan disease. Oriental sores, also known as cutaneous leishmaniasis, is caused by the parasitic protozoa called Leishmania that is transmitted through sandfly bites. Therefore, this option is incorrect.

Option 3: Sleeping sickness - This is a protozoan disease. Sleeping sickness, also known as African trypanosomiasis, is caused by the protozoan parasite Trypanosoma, which is transmitted by the tsetse fly. Therefore, this option is incorrect.

Option 4: Kala-azar - This is a protozoan disease. Kala-azar, also known as visceral leishmaniasis, is caused by the proto