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21 Cards in this Set

  • Front
  • Back
Definition of parasite
Worm, protozoa, arthropod (ie, not virus, bacteria, fungus)
What are the 3 most important stages of the parasite life cycle?
Infectious, pathogenic, diagnostic
What are the 2 types of hosts?
Definitive host, Intermediate host
What defines the definitive host?
Parasite is sexually mature, able to reproduce (and eggs or viviparous larvae may either hatch within the host or be shed)
What defines the intermediate host?
A host that supports the growth of the parasite
Whats defines an accidental host?
Parasite cannot necessarily grow or reproduce, but may still cause disease
What is the best source of information for treatment of parasitic disease?
The Medical Letter
What determines the extent of disease in most parasitic infections?
The number of worm eggs or larvae THAT ENTER (as most worms do not multiply in humans)
Classification of round worms
Nonvivparous (hook, pin, whip; ascaris, strongyloides, larva migrans)

Viviparous (filariae, dracunulus, trichinella)
Types of filariases
Wuchereria (Elephantiasis), Onchocerca (River Blindness), Loa Loa (Eye Worm)
Classification of flat worms
Flukes (Schistosomes)
Tapeworms (Taenia Saginata, Taenia Solium, Diphyllobothrium Latum, Echinococcus Granulosus, Echinococcus Multilocularis)
Types of schistosomes
Mansoni, Haematobium, Japonicum (schistosomes are fluke flatworms)
Classification of arthropods
Insects (Lice, Fleas, Bugs, Flies)
Arachnids (Ticks, Mites, Spiders, Scorpions)
Definition of protozoa
Single-celled eukaryote
List the anaerobic protozoa
Entamoeba histolytica (Amebiasis), Giardia, Trichomonas Vaginalis
List the four "spor" intestinal parasites
Cyclospora, Cryptosporidium, Isospora, Microsporidia
List the three types of malaria parasites
Falciparum, Vivax, Malariae
This worm has a ciliated stage
Pipestem fibrosis is a feature of this worm infection
These are the parasitic diseases seen in AIDS patients, in order of frequency
1. Pneumocystis (penumonia)
2. Toxoplasmosis (encephalitis)
3. Cryptosporidiosis (diarrhea)
4. Amebiasis (dysentery, invasive dz)
5. Visceral leishmaniasis
6. Strongyloides hyperinfection (very rare)
These are the hemoflagellates
African trypanosomes, Leishmania, Trypanosoma cruzi