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26 Cards in this Set
- Front
- Back
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Schizogony
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the process of multiple fission, in which an organism divides to produce many daughter cells
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Conjugation
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the transfer of genetic material from one cell to another involving cell-to-cell contact
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Gametocytes
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male or female protozoan cell
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Cysts
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– a sac with a distinct wall containing fluid or other material; also, a protective capsule of some protozoa
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Sporozoite
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a trophozoite of plasmodium found in mosquitoes, infective for humans
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Merozoite
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– a trophozoite of plasmodium found in red blood cells or liver cells
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Trophozoite
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the vegetative form of a protozoan
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Pseudopods
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an extension of a eukaryotic cell that aids in locomotion and feeding
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Archaezoa
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– lack mitochondria, many live as symbionts in digestive tracts of animals, most have flagella for movement
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Microspora -
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a genus of green algae
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Rhizopoda
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move by pseudo pod cytoplasmic projections
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Apicomplexa
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non motile in mature forms; obligate intracellular parasite; complex/special organelles at apexes of cell; has a complex life cycle
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Ciliophora
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– have cilia arranged in rows. The only human parasite is Balantidium coli.
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Euglenozoa
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two groups of these flagellated cells: euglenoids (photoautotrophs) and hemoflagellates (blood parasites)
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Hemoflagellates
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a parasitic flagellate found in the circulatory system of its host
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Intermediate host
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an organism that harbors the larval or asexual stage of a helminth or protozoan
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Definitive host
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– an organism that harbors the adult, sexually mature form of a parasite
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Giardia lamblia
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Giardiasis;w/malaise,nausea,
gas, weakns, wt loss,& ab. cramps; resists chlorine, must boil or filter. Ingested with contaminated food/water |
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Entamoeba histolytica
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Infection of poor hygiene. Human prim.host or pets Cysts excyst in sm. intestine, trophozoites colonize & repr. in lg.intestines (colitisdiarrhea), pass in feces or invade the bld. vessels.
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Plasmodium species
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Malaria. Vector borne diseases, sprd. by mosq. In humans, parasite found prim.in the RBCs. repr.asexually inside the RBC & RBC breaks open & release new paras. merozoites
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Trypanosoma species
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– infects hoofed animals & humans by vectors, common vector tsetse fly, (glossina). This causes Aftrican sleeping sickness.
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Trichomonas
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if normal acidity of the vagina is disturbed, the protozoan overgrow normal microbial pop. of the genital mucosa to cause this. It is an STD. incidence is higher than gonorrhea or Chlamydia. (p. 802-803)
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Toxoplasmosis
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toxoplasma gondii. Infect almost any animal. Obligate intracellular parasite. Two phase life cycle: intestinal phase in cats to produce oocysts. extra-intestinal phase occurs in all infected animals to produce tachyzoites (feces), bradyzoites (raw or uncooked meat), or zoitocysts. This disease caused is asymptomatic.
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Coccidiosis -
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?
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Cryptosporidium
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Parasites of intestinal tracts of fish, rept. birds, and mammals. In humans, it is called C. parvum. The parasite does asexual reprod. in the sm.int.& oocysts produced,passed in host’s feces, & contaminate water & food.
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EXAM 4 CHAPTER 12
PROTOZOA MICROBIOLOGY 251 |
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