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21 Cards in this Set
- Front
- Back
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Definition of parasite
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Worm, protozoa, arthropod (ie, not virus, bacteria, fungus)
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What are the 3 most important stages of the parasite life cycle?
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Infectious, pathogenic, diagnostic
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What are the 2 types of hosts?
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Definitive host, Intermediate host
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What defines the definitive host?
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Parasite is sexually mature, able to reproduce (and eggs or viviparous larvae may either hatch within the host or be shed)
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What defines the intermediate host?
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A host that supports the growth of the parasite
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Whats defines an accidental host?
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Parasite cannot necessarily grow or reproduce, but may still cause disease
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What is the best source of information for treatment of parasitic disease?
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The Medical Letter
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What determines the extent of disease in most parasitic infections?
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The number of worm eggs or larvae THAT ENTER (as most worms do not multiply in humans)
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Classification of round worms
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Nonvivparous (hook, pin, whip; ascaris, strongyloides, larva migrans)
Viviparous (filariae, dracunulus, trichinella) |
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Types of filariases
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Wuchereria (Elephantiasis), Onchocerca (River Blindness), Loa Loa (Eye Worm)
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Classification of flat worms
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Flukes (Schistosomes)
Tapeworms (Taenia Saginata, Taenia Solium, Diphyllobothrium Latum, Echinococcus Granulosus, Echinococcus Multilocularis) |
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Types of schistosomes
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Mansoni, Haematobium, Japonicum (schistosomes are fluke flatworms)
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Classification of arthropods
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Insects (Lice, Fleas, Bugs, Flies)
Arachnids (Ticks, Mites, Spiders, Scorpions) |
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Definition of protozoa
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Single-celled eukaryote
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List the anaerobic protozoa
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Entamoeba histolytica (Amebiasis), Giardia, Trichomonas Vaginalis
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List the four "spor" intestinal parasites
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Cyclospora, Cryptosporidium, Isospora, Microsporidia
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List the three types of malaria parasites
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Falciparum, Vivax, Malariae
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This worm has a ciliated stage
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Schistosome
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Pipestem fibrosis is a feature of this worm infection
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Schistosomiasis
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These are the parasitic diseases seen in AIDS patients, in order of frequency
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1. Pneumocystis (penumonia)
2. Toxoplasmosis (encephalitis) 3. Cryptosporidiosis (diarrhea) 4. Amebiasis (dysentery, invasive dz) 5. Visceral leishmaniasis 6. Strongyloides hyperinfection (very rare) |
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These are the hemoflagellates
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African trypanosomes, Leishmania, Trypanosoma cruzi
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