Identification & Clinical Importance of Fungi
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Questions and Answers

Which organism is the causative agent of candidiasis?

  • Mycetoma
  • Candida albicans (correct)
  • Histoplasma spp
  • Cryptococcus neoformans

    • Which type of fungi are Candida albicans?

  • Ascomycetes
  • Gram-negative fungi
  • Gram-positive fungi (correct)
  • Basidiomycetes

    • What is the unique feature of C. glabrata among Candida species?

  • Forms pseudohyphae
  • Forms chlamydospores
  • Forms true hyphae
  • Does not form pseudohyphae (correct)

    • How is Candida albicans identified on nutritionally deficient media?

    <p>Forms chlamydospores</p> Signup and view all the answers

    What phenomenon is exhibited by Candida albicans when it forms germ tubes?

    <p>Reynolds Braude phenomenon</p> Signup and view all the answers

    What usually precedes invasive candidiasis?

    <p>Increased colonization of the mouth and vagina</p> Signup and view all the answers

    How do majority of non-albican vagina species enter the blood?

    <p>Through intravascular catheterization</p> Signup and view all the answers

    What is the distinguishing factor between C. albicans and other Candida species?

    <p>Ability to form chlamydospores</p> Signup and view all the answers

    What indicates accurate identification of Candida species other than C. albicans?

    <p>Biochemical tests</p> Signup and view all the answers

    What is the term for the growth form of C. albicans seen as budding yeast cells but could form pseudohyphae in cultures and tissues?

    <p>Dimorphic growth</p> Signup and view all the answers

    Which characteristic distinguishes Candida albicans from other Candida species?

    <p>Ability to form chlamydospores on nutritionally deficient media</p> Signup and view all the answers

    What is the distinguishing feature of C. glabrata among Candida species?

    <p>Inability to form chlamydospores</p> Signup and view all the answers

    Which phenomenon is exhibited by Candida albicans when it forms germ tubes?

    <p>Reynolds Braude phenomenon</p> Signup and view all the answers

    How is Candida albicans identified on corn meal agar at 20°C?

    <p>Formation of chlamydospores</p> Signup and view all the answers

    What typically precedes invasive candidiasis?

    <p>Increased colonization of the mouth and vagina</p> Signup and view all the answers

    How do the majority of non-albican vagina species enter the blood?

    <p>Following intravascular catheterization</p> Signup and view all the answers

    What is the causative agent of candidiasis?

    <p>Candida albicans</p> Signup and view all the answers

    In what way are all pathogenic Candida similar to non-pathogenic strains?

    <p>Morphological appearance as budding yeast cells</p> Signup and view all the answers

    What is the distinguishing feature of C. glabrata among Candida species?

    <p>It does not form pseudohyphae in cultures and tissues</p> Signup and view all the answers

    What indicates accurate identification of Candida species other than C. albicans?

    <p>Biochemical tests</p> Signup and view all the answers

    How do the majority of non-albican vagina species enter the blood?

    <p>Through intravascular catheterization</p> Signup and view all the answers

    What phenomenon is exhibited by Candida albicans when it forms germ tubes?

    <p>Reynolds Braude phenomenon</p> Signup and view all the answers

    In what way are all pathogenic Candida similar to non-pathogenic strains?

    <p>They are actually commensals of humans</p> Signup and view all the answers

    Which type of fungi are Candida albicans?

    <p>Gram-positive fungi</p> Signup and view all the answers

    What usually precedes invasive candidiasis?

    <p>Increased colonization of the mouth and vagina</p> Signup and view all the answers

    What is the distinguishing factor between C. albicans and other Candida species?

    <p>Formation of germ tubes</p> Signup and view all the answers

    What is the term for the growth form of C. albicans seen as budding yeast cells but could form pseudohyphae in cultures and tissues?

    <p>Blastoconidia</p> Signup and view all the answers

    What is the causative agent of candidiasis?

    <p>Candida albicans</p> Signup and view all the answers

    What is the minimum infective dose for humans of Giardia lamblia?

    <p>10-25 cysts</p> Signup and view all the answers

    Where do trophozoites of Entamoeba histolytica differentiate into cysts?

    <p>Colon</p> Signup and view all the answers

    How are cysts of Entamoeba histolytica removed from water?

    <p>Both A and C</p> Signup and view all the answers

    What is the drug of choice for treating trichomoniasis caused by Trichomonas vaginalis?

    <p>Metronidazole</p> Signup and view all the answers

    What indicates accurate identification of pathogenic strains of Entamoeba histolytica?

    <p>Polymerase chain reaction (PCR)</p> Signup and view all the answers

    Where do trophozoites of Giardia lamblia attach in the intestine?

    <p>Duodenal villi</p> Signup and view all the answers

    Which site is most frequently involved in systemic disease caused by Entamoeba histolytica?

    <p>Liver</p> Signup and view all the answers

    Which test is used for laboratory diagnosis of giardiasis?

    <p>Identification of trophozoites and cysts in stools</p> Signup and view all the answers

    What is the primary mode of transmission for Trichomonas vaginalis?

    <p>Sexual intercourse</p> Signup and view all the answers

    What is the shape of the trophozoite of Trichomonas vaginalis?

    <p>Pear-shaped with central nucleus and anterior flagella</p> Signup and view all the answers

    What does gastric acid stimulate in Giardia lamblia excystation?

    <p>Cyst release in the duodenum &amp; jejunum</p> Signup and view all the answers

    Which category of parasites includes single-celled organisms like amebas and flagellates?

    <p>Sarcodina</p> Signup and view all the answers

    What is the classification for organisms like tapeworms and flukes?

    <p>Platyhelminthes</p> Signup and view all the answers

    What is the medical importance of Entamoeba histolytica?

    <p>Causes liver abscess</p> Signup and view all the answers

    How is Entamoeba histolytica primarily transmitted?

    <p>Fecal-oral route</p> Signup and view all the answers

    Which category includes roundworms or nematodes?

    <p>Nemahelminthes</p> Signup and view all the answers

    What disease is caused by Giardia lamblia?

    <p>Flagellate infection</p> Signup and view all the answers

    What distinguishes Cestoda among the medically important classes within Phylum Platyhelminthes?

    <p>Characteristics of tapeworms</p> Signup and view all the answers

    Which parasite is most prevalent among male homosexuals?

    <p>Entamoeba histolytica (ameba)</p> Signup and view all the answers

    Which route of transmission primarily occurs among male homosexuals for Entamoeba histolytica?

    <p>Anal-oral transmission</p> Signup and view all the answers

    What differentiates Sporozoa from Mastigophora?

    <p>Type of infection caused</p> Signup and view all the answers

    What distinguishes Platyhelminthes from Nemahelminthes?

    <p>Classification as single-celled or multicellular</p> Signup and view all the answers

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