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

Protists have been historically informally grouped into three categories: 
- "Animal-Like" Protozoans
- "Plant-Like"  Algae
- "Fungus-Like" Protists

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

Types of Parasites

These are diseases spread by parasitic arthropods.

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