Visit your local college or university library. Consider search topics such as “tropical diseases,” “parasitic diseases,” or “infectious diseases.” School textbooks or medical/veterinary textbooks will often have all the information you need for your project, including the following:
historical background of the disease
description of signs and symptoms
how a diagnosis of the disease is made
treatment for the disease
life cycle of the disease (how disease is spread)
occurrence data (if available)
Visit your local bookstore. Health-related books often provide information on parasitic diseases.