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52 Cards in this Set
- Front
- Back
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Define intestinal protozoa
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They are unicellular organisms
Cyst: infective stage Trophozoite: Reproductive stage |
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What is the classification of intestinal protozoa based on?
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method of locamotion
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What are the 5 classification of intestinal protozoa?
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Amoebae: Psuedopods
Flagellates: Flagella Ciliates: Cilia Coccidia: nonmotile Microsporidia: nonmotile |
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What structures are the common features in intestinal protozoa?
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Nucleus: containing chromosomes: chromatin and karyosome
Cytoplasm may contain: contractile vacuoles RBC's Yeast Bacteria Pseudopodia Chromatoidal Bodies |
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Define Chromatioidal bodies
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condensed RNA material
rod shaped storage of glycogen and protein seein in CYST FORM ONLY |
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What are the chromosomes found in the structure of intestinal protozoa?
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Chromatin: inside nucleus wall in clumps
Karyosome: clot or mass of chromatin; central or eccentric placement |
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How are intestinal protozoa transmitted?
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Host to host
ingestion through contamintated food/water |
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Define: excyst and encyst
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Excyst: in small intestine
Encyst: in large intestine |
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What is the infective stage of intestinal protozoa?
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cyst
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What is the diagnostic stage of intestinal protozoa?
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cyst and/or the troph seen in stool.
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List the Amoeba intestinal protozoa
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Entamoeba Histolytica
Entamoeba Hartmainni Entamoeba Coli Endolimax Nana Iodamoeba Butschlii |
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What is the disease caused by Entamoeba Histolytica?
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Amoebic dysentery with bloody stools
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How is Entamoeba histolytica transmitted?
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through fecal contaminated water supply
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What does Entamoeba Histolytica secrete?
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Proteolitic enzyme: Tissue invasive producing necrosis
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Characteristics of E. Histolytica cyst
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4 nuclie with central karyosome
fine peripheral chromatin clean cytoplasm but sometimes has chromatoidal bodies present |
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Characteristics of E. Histolytica troph
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single nucleus with central karyosome
fine peripheral chromatin cytoplasm with no contracile vacuoles; finely granule Ingested RBC's |
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What are the diagnostic features of the E. Histolytica troph?
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Ingested RBC's
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Entamoeba Hartmainni
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Non pathogenic
small "variant" E. Histolytica have no ingested RBC's |
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E. Hartmainni cyst and troph
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Small E. histolytica
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Entamoeba Coli Cyst
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4-8 nuclei
large eccentric karyosome 2 nuclei in immature cyst chromatoidal bodies |
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E. Coli troph
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single nucleus and eccentric karysome
RBC's never present Cytoplasm coarsely granular Chromatin is more clumpy than smooth |
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Are Endolimax Nana Commensal or non commensal?
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Commensal
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Endolimax Nana Cyst
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4 nuclei dense and stain red
small and oval no peripheral chromatin |
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Endolimax Nana troph
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Single nucleus with large karyosome
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Are Iodamoeba Butschlii commensal or non commensal?
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Commensal
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Iodamoeba Butschlii cyst
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single nucleus with eccentric karyosome surrounded by hyaline area
Large cytoplasmic glycogen vacuole that stains dark brown with iodine |
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What is the diagnostic feature of Iodamoeba Butschlii?
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Large cytoplasmic glycogen vacuoles that stains dark brown with iodine
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Iodamoeba Butschlii troph
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single nucleus usually centrally located
nucleus surrounded by hyaline area cytoplasm may or may not contain glycogen vacuole |
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What are the intestinal protozoa flagellates?
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Dientamoeba Fragilis
Giardia Lamblia Trichomonas Vaginalis |
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Dientamoeba Fragilis
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Disease is most commen in children
seen in TROPH STAGE ONLY 2 nuclei (binucleated) no external flagellum pseudopodia |
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What is the most common parasite in the US?
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Giardia Lamblia
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How do you acquire Giardia Lamblia?
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Ingestion of cysts
found in contaminated water |
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Diseases of Giardia Lamblia
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Travelers Diarrhea (hikers, campers)
Diarrhea, abd pain, malabsorption This is a reportalbe communicable disease |
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Giardia Lamblia cyst
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oval with smooth cell wall
4 nuclei with central axostyle parabasal body resists chlorination |
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Giardia Lamblia troph
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Pear shaped, bilaterally symmetrical
central axosytle with 2 nuclei 2 parabasal bodies 4 pair of flagella "sucking disk" for intestinal aattachment |
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Trichomonas Vaginalis Disease
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This is a sexually transmitted diease
causes vaginitis |
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How is Trichomonas Vaginalis Diagnosed?
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By vaginal wet prep
This can be seen in urine sediment also |
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What is the most common parasite in the US?
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Giardia Lamblia
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How do you acquire Giardia Lamblia?
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Ingestion of cysts
found in contaminated water |
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Diseases of Giardia Lamblia
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Travelers Diarrhea (hikers, campers)
Diarrhea, abd pain, malabsorption This is a reportalbe communicable disease |
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Giardia Lamblia cyst
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oval with smooth cell wall
4 nuclei with central axostyle parabasal body resists chlorination |
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Giardia Lamblia troph
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Pear shaped, bilaterally symmetrical
central axosytle with 2 nuclei 2 parabasal bodies 4 pair of flagella "sucking disk" for intestinal aattachment |
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Trichomonas Vaginalis Disease
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This is a sexually transmitted diease
causes vaginitis |
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How is Trichomonas Vaginalis Diagnosed?
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By vaginal wet prep
This can be seen in urine sediment also |
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Trichomonas Vaginalis is found in what form?
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Troph only
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Trichomonas Vaginalis troph
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pyriform shape (pear shaped)
2 pair of flagella undulating membrane |
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define undulating membrane
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to cause to move in waves
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What are the intestinal protozoa cilates?
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Balantidium Coli
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How do you obtain Balantidium Coli?
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Man ingests the cyst form through contaminated water or food
this invades bowel mucosa not common in U.S. This is the only ciliate that infects man |
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What is the only ciliate that infects man?
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Balantidium Coli
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Balantidium Coli cyst
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Oval or spherical shaped
Macro and micronucleus present thick refractile cell wall cilia inside cyst wall: none on outer surface |
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Balantidium Coli Troph
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Large, Ovoid, Covered with cilia
Kidney bean shaped macronucleus Micronucleus present tucked in curve of macronucleus Food and contractile vacuoles in cytoplasm |
