WorksheetsMycoviro Introduction Part 2
Total questions: 23
Worksheet time: 22mins
Most clinically significant species belong to the phylum Glomeromycota. The Members of the order are rapidly growing organisms normally found in soil, and are often opportunistic pathogens in immunocompromised host.
(a)
Generally produce profuse, gray to white, aerial mycelium characterized by the presence of hyaline, sparsely septate hyphae.
(a)
TRUE OR FALSE : Asexual reproduction is characterized by the presence of sporangiophores and sporangiospores ▪ Sexual reproduction, resulting in the production of zygospores, occurs in some, but these structures are not routinely seen in clinical laboratories.
(a)
Fungi associated with the class Ascomycetes are characterized by the production of sexual spores called (a) .
They are usually identified on the basis of characteristic asexual structures.
(a)
Which of the following does not belong to the group:
Microsporum spp.
Trichophyton spp.
Pseudallescheria boydii
Rhizomucor
This division contains the largest number of organisms that are causative agents of mycoses, including cutaneous, subcutaneous, and systemic disease.
(a)
Fungi which lack sexual reproduction. Asexual reproduction is primarily through conidia. Organisms in this group are identified on the basis of characteristic asexual reproductive structures.
(a)
Which of the following does not belong to the group?
Epidermophyton spp.
Sporothrix spp.
Candida spp.
Filobasidiella neoformans,
Specimen placed directly on a microscopic slide. One to two drops of 10-20% KOH is added.
(a)
This makes fungi much easier to see than bacteria in stained slides ▪ Most commonly used stains for observing fungi in tissue are periodic acid-Schiff (PAS) and Gomori’s methenamine silver (GMS) stain.
(a)
It is particularly valuable for visualizing yeast and other forms of fungi in tissue.
(a)
Only pathogenic encapsulated yeast.
(a)
Buds forming a "Captain's wheel" and Methenamine silver stain is used.
(a)
The characteristic feature of the yeast cells of this pathogenic fungus is that many are long and slender and are therefore frequently described as “cigar-like” in shape.
(a)
Undergoing broad-base budding.
(a)
▪ Large, sac-like structures which fill with spores as they mature
(a)
Usually 5 to 10 microns in diameter.
(a)
It may also form when fungi colonize cavitary lesions of tuberculosis.
(a)
Tightly packed masses of hyphae or filaments which are surrounded by a tough outer rind.
(a)
Granules in this disease are relatively large and are surrounded by a very thick rind.
(a)
Spherical, dematiaceous structures ▪Neither bud nor produce hyphae.
(a)
▪ Some medical mycologists call these structures, sclerotic bodies or Medlar bodies ▪ Characteristics of the disease known as chromomycosis or chromoblastomycosis.
(a)
