Directions: The set of lettered headings below is followed by a list of numbered

Question

Directions: The set of lettered headings below is followed by a list of numbered words or phrases. For each numbered word or phrase write the correct letter in the blank. a. Rhizopus b. Mucor c. both d. neither 82. aseptate hyphae 83. presence of rhizoids 84. grow(s) anaerobically 85. sporangia at the tip of sporangiophores produced 86. growth is inhibited by cycloheximide 87. aerobic growth only 88. hyaline hyphae 89. presence of macroconidia

Directions: Each of the questions or incomplete statements below is followed by 4 or 5 suggested answers or completions. Select the one that is BEST in each case.

90. Thick-walled, rectangular, or barrel-shaped alternate arthroconidia are characteristic of which of the following dimorphic molds? a. Coccidioides immitis b. Sporothrix schenckii c. Histoplasma capsulatum d. Blastomyces dermatitidis

91. This dimorphic fungus appears as oval or elongated cigar shapes, some with multiple buds in its yeast form: a. Coccidioides immitis b. Sporothrix schenckii c. Histoplasma capsulatum d. Blastomyces dermatitidis

92. The India ink stain is used to presumptively identify which organism? a. Aspergillus niger in blood b. Cryptococcus neoformans in CSF c. Histoplasma capsulatum in CSF d. Candida albicans in blood or body fluids

93. The observation of colonies with a dark brown, green-black, or black appearance on both the surface and reverse side is characteristic of:: a. Dimorphic fungus b. Dermatophyte c. Hyaline mold d. Dematiaceous mold

94. In a germ tube preparation, a yeast isolate produced a few cells with hyphal extensions with constrictions where attached to the mother cells. Candida albicans was ruled out when confirmatory tests were performed. The most likely species of yeast is: a. Candida tropicalis b. Cryptococcus neoformans c. Candida glabrata d. Rhodotorula rubra

95. Blastospores (blastoconidia) represent the initial stage in the production of: a. Arthrospores b. Germ tubes c. Pseudohyphae d. True hyphae

Explanation / Answer

82. C
83. A
84. B
85. A
86. C
87. A
88. C
89. D

90. Coccidioides immitis
91. Sporothrix schenckii
92. Cryptococcus neoformans in CSF
93. Dematiaceous mold
94. Candidia tropicalis
95. pseudohyphae

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