Multicellular organisms that can be parasitic or free living, unable to multiply while within humans (in adult form).

Helminths

Organisms that attach or burrow in to the skin for weeks to months long duration.

Ectoparasites

Historically, protists have been informally categorized into three distinct groups based on their characteristics: the animal-like protozoans, the plant-like algae, and the fungus-like protists (such as water molds).

Groups of Protists

Georgetown University

A parasite is an organism that takes from and hurts its host organism in order to survive. 

Parasite

Centers for Disease Control and Prevention. (n.d.). Centers for Disease control and Prevention. Centers for Disease Control and Prevention. https://www.cdc.gov/. 

Centers for Disease Control and Prevention

These are diseases spread by parasitic arthropods.

Vector borne parasitic diseases

Parasitology is a subfield of microbiology focused specifically on the study of helminths and other parasites.

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