Protozoan parasites are transmitted through different routes, depending on the species. Common methods include contaminated water, food, and vector-borne transmission. For instance, the protozoan parasite Plasmodium, responsible for malaria, is spread through the bites of infected Anopheles mosquitoes. Others, like Giardia and Cryptosporidium, often spread via contaminated water sources and can cause gastrointestinal illnesses.
