Atlas of Medically Significant Fungi, Medically Significant Fungi, images, picture, atlas, atlas of medical, tuyenlab.net, Textbook of Diagnostic Microbiology 4th edition 2011, Connie R. Mahon, Donald C. Lehman, George Manuselis
|Fig 1. Formation of blastoconidia in yeast.|
|Fig 2. Aerial mycelia give mould the “woolly”|
appearance. Vegetative mycelia are responsible for
absorbing nutrients from the medium.
|Fig 3. A, Specialized structures that are formed in vegetative mycelia by certain|
fungal species. B, Rhizopus spp. showing rhizoids.
|Fig 4. A, Phaeoacremonium sp. displaying septate hyphae. B, Zygomycetous|
hyphae in tissue appears sparsely septate.
|Fig 5. Bipolaris sp. is an example of a dematiaceous|
fungus. Note the dark pigmentation, which is due to the
presence of melanin in the cell wall.
|Fig 6. An example of asexual reproduction is the|
production of phialoconidia. Conidia are formed from
conidiogenous cells like phialide (a vaselike structure).
Phialoconidia are “blown out” of the phialide.
|Fig 7. Arthroconidia, another form of asexual|
reproduction, are formed by fragmentation of fertile
|Fig 8. Sexual reproduction occurs by the fusion|
of compatible nuclei and subsequent production of a
|Fig 9. Asexual reproduction by Zygomycetes is|
characterized by the production of spores (sporangiospores)
from within a sporangium.
|Fig 10. Diagram of the layers of skin and tissues in|
which fungal infections can occur.
|Fig 11. Diagram of the typical “spaghetti and|
meatballs” appearance of Malassezia furfur in a potassium
|Fig 12. Microscopic appearance of Trichosporon|
species on lactophenol cotton blue preparation showing the
presence of both blastoconidia and arthroconidia.
|Fig 13. Microscopic structures of Phaeoannellomyces|
werneckii, showing characteristic budding annelloconidia.
P. werneckii causes tinea nigra.
|Fig 14. Microsporum canis showing spindle-shaped,|
echinulate macroconidia with thick walls and tapered ends,
which are key features in identification of this species.
|Fig 15. Microsporum gypseum showing fusiform,|
moderately thick-walled macroconidia containing several
|Fig 16. Trichophyton mentagrophytes showing|
globose, teardrop-shaped microconidia. (Nomarski optics,
|Fig 17. Trichophyton rubrum showing clavate- or|
|Fig 18. A, Conidia of Phialophora verrucosa at the tips of phialides with|
collarettes (Nomarski optics, 1250×). B, Conidial arrangement of Cladophialophora
|Fig 19. Actinomycotic mycetoma showing fine-branching, filamentous rods in|
tissue sample (A), compared with the hyphal elements (B) seen in eumycotic infections
|Fig 20. The Scedosporium apiospermum anamorph|
of Pseudallescheria boydii. (Nomarski optics, 625×).
|Fig 21. Sexual structures (cleistothecia containing|
ascospores) of Pseudallescheria boydii. (Nomarski optics, 325×).
|Fig 22. Conidia of Exophiala sp. borne at the tips of|
annellides. (Nomarski optics, 1250×).
|Fig 23. Conidia of Exophiala dermatitidis borne at|
the tips of phialides as well as the black yeast synanamorph.
(Nomarski optics, 1250×).
|Fig 25. Conversion of the mould phase of|
Blastomyces dermatitidis to the “broad-based bud” yeast
form. (Nomarski optics, 1250×).
|Fig 26. Mould phase of Blastomyces dermatitidis|
grown on potato flakes agar. (Nomarski optics, 1250×).
|Fig 27. The exoantigen immunodiffusion test (A); a band of identity between|
culture filtrate 2 and control antigen (B); a band of nonidentity (C); and a band of
partial identity (D).
|Fig 28. Spherules of Coccidioides immitis in tissue (300×).|
|Fig 29. Mould phase of Coccidioides immitis, 25° C.|
(Nomarski optics, 1250×).
|Fig 30. A, Bone marrow aspirate stained with Giemsa showing the yeast cells of|
Histoplasma capsulatum var. capsulatum inside the monocytes (1200×). B, Tissue phase of
H. capsulatum var. capsulatum. (Gomori methylene stain, 1200×).
|Fig 31. Large tuberculate macroconidia of|
Histoplasma capsulatum var. capsulatum (Nomarski optics, 1250×).
|Fig 32. Yeast phase (“mariner’s wheel”) of|
Paracoccidioides brasiliensis with multipolar budding.
(Nomarski optics, 1250×).
|Fig 33. Absidia sp.|
|Fig 34. Cunninghamella sp.|
|Fig 35. Mucor sp.|
|Fig 36. Rhizopus sp.|
|Fig 37. Syncephalastrum sp.|
|Fig 38. Aspergillus sp.|
|Fig 39. Beauveria sp.|
|Fig 40. Chrysosporium sp.|
|Fig 41. Fusarium sp.|
|Fig 42. Geotrichum sp.|
|Fig 43. Paecilomyces sp.|
|Fig 44. Penicillium sp.|
|Fig 45. Scopulariopsis sp|
|Fig 46. Trichoderma sp.|
|Fig 47. Alternaria sp.|
|Fig 48. Chaetomium sp.|
|Fig 49. Cladosporium sp.|
|Fig 50. Curvularia sp.|
Fig 51. Phoma sp.
|Fig 52. Pithomyces sp.|
|Fig 53. Ulocladium sp.|
|Fig 54. India ink preparation is used primarily|
to examine cerebrospinal fluid for the presence of the
encapsulated yeast Cryptococcus neoformans. This is an India
ink preparation from an exudate containing encapsulated
|Fig 55. A, Pneumocystis jiroveci cysts (silver stain). B, P. jiroveci (Giemsa stain).|
Notice the circular arrangement of intracystic bodies within a faint outline of cyst wall in
center of field.
|Fig 56. Guideline for the identification of fungal isolates. LPCB, lactophenol|
|Fig 57. Bone marrow stained with Giemsa stain|
showing the yeast phase of Histoplasma capsulatum var.
A positive hair perforation test shows|
penetration of the fungal agent in the hair shaft. This is the
typical reaction by Trichophyton mentagrophytes, whereas
Trichophyton rubrum causes only surface erosion of hair
|Fig 59. Schematic diagram showing how the germ-tube test can be used to|
presumptively identify yeasts.
Germ-tube production by Candida albicans.|
A positive germ tube has no constriction at its base.
|Fig 61. Candida tropicalis shows constriction at the|
base of the germ tube, called a pseudogerm tube.
|Fig 62. Candida albicans on cornmeal agar showing|
|Fig 63. Pseudohyphae occur when the blastoconidia|
germinate and form a filamentous mat.
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