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34 Cards in this Set
- Front
- Back
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largest of the unicellular true microorganisms
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protozoa
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move by bulging and retracting their cytoplasm in any direction
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amebae
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what is a major pathogen of ameboa
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entamoeba histolytica
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move by rapid beating of cilia that cover the cell membrane
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ciliate
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what protozoan ciliate causes disease in humans
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balantidium coli
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possess one or more flagella that give them a lashing motility
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flagellates
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what are the major pathogens in flagellates
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giardia lamblia
trichomonas vaginalis |
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has no special structures for locomotion
reproductive cycle includes both immature and mature forms |
apicomplexa
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what are the representative pathogens in th apicomplexa group and what do they cause
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- taxoplasma gondii
- plasmodium cause malaria |
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subphylum of apicomplexa
- all stages of parasite development are intracellar |
coccidia
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includes a large group obligate, intracellular protozoa that produce spores
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microspora
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what are some major genera causing human disease in microspora
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enterocytozoon
encephalitozoon nosema pleistophora |
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what are some routinely available laboratory techniques
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ova and parasite exam for recovery of protozoa and helminths from fecal specimens, by direct saline, iodine wet mounts and concentration procedure for a permanent stain such as trichrome method
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what type of smears are used for the detection of blood parasite parasites like malaria
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thick and thin
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what are some clinically significant intestinal protozoa
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amabae
flagellates ciliates coccidia microsporidia |
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name motile trophozoates of amebae
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flagellates
ciliate |
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how can amebae motile trophozoates be detected in lab
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fresh specimes submitted to the laboratory within 30 min of passage
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how many nuclei do trophozoite have
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1
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what is the diagnostic tool for E. histolytica
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the presence of ingested erythrocytes
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bilaterally symmetrical, pear shaped, and contain two nuclei with centrally located karyosomes
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G, lamblia trophozoites
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has a concave sucking disc and may be apparent with proper staining and org orientation
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G. lamblia
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oval or ellipsoidal in shape and usually have 4 nuclei
- intracystoplasmic fibrils are usually visible |
g. lablia cysts
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- intestinal cestodes
- attach to mucosa by means of scolex at the anterior end that may display suckers, grooves, or restellum with hooks, descending upon species |
tapeworms
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the body is comprised of an actively growing neck region and a series of maturing proglottids
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tapeworms
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the most common helminthic infection found in children
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pinworm e. vermicularis
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infections may be asymptomatic or cause perianal skin irritation
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pinworm (e. vermicularis)
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when examining the perianal skin what is used to detect eggs of e. vermicularis
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cellophane tape
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beef tapeworm
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taenia saginata
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pork tapeworm
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taenia solium
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how is human infection of taenia species
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via ingestion of egg or incompletely cooked beef or pork
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how is diagnosis of taenia species
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eggs in stool using direct or concentration techniques, or in the perianal folds, using the cellophane tape technique
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the only ciliate protozoa to infect humans and produces dysentery like syndrome with colonic ulceration similar to that produced by E. histolytica
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balantidium coli
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what is the hallmark of malaria
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paroxysm consisting of chills, fever, and sweating
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how often do proxysms recur in tertian malaria
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48 hr intervals
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