Symptoms of protozoan and helminthic diseases are due to

Symptoms of protozoan and helminthic diseases are diarrhea, nausea, vomiting, cramps, fever, dehydration, anorexia, abdominal discomfort and weight loss.

Explanation:

Protozoan diseases such as malaria, giardia, and toxoplasmosis caused by protozoan organisms while helminthic diseases are caused by parasitic worms. These worms attack on the helminths which is a body part of human. Symptoms of protozoan and helminthic diseases are due to the attack of parasitic worms and harmful protozoans on the body parts of human beings.