Parasitic Infection Flashcards
Three main subtypes / classes of human parasites
Protozoa, helminths, and ectoparasites
One-celled organisms that are free-living or harbors on a host. Capable of multiplying in humans, contributing to its survival and permitting further serious infections to develop
Protozoa
What are possible routes of transmission of protozoa parasites that harbor in the human GI tract
fecal-oral route, contaminated food/water, person to person
How are protozoa that live in the blood transmitted?
By the bite of an infected arthropod
Large multicellular organisms visible to the naked eye in adult stage. Free-living or harbors on a host.
Helminths
Mode of movement of protozoa
Sarcodina
Ameba
Mode of movement of protozoa
Mastigophora
The flagellates
Mode of movement of protozoa
Ciliophora
The Cilates
Mode of movement of protozoa
Non motile adult stage organisms
Sporozoa
What protozoa is the leading cause of waterborne disease in the united states
Cryptosporidium
Helminth that resides in the GI tract, Blood flukes and tapeworms.
Flatworms
Helminths that reside in the GI tract (Acanthocephalins)
Thorny-headed worms
Helminths that reside in the GI tract, blood, lymph system, or subcutaneous tissue
Roundworms (Nematodes)
Type of parasites that include Ticks, fleas, and mites that burrow into the skin and remain there for weeks to months. Also includes blood sucking arthropods (Mosquitoes)
Ectoparasites
What lab study should be ordered for helminths parasites in patients presenting with GI symptoms
Fecal (stool) exam
Three samples on three separate days
Ova and Egg
