A section of tissue from the foot of a person assumed to have eumycotic mycetoma shows a white, lobulated granule composed of fungal hyphae. The most common etiologic agent of this condition is a species of which of the following?
a. The white lobulated granule suggests that the cause of mycetoma is a hyaline mold. Eumycotic mycetoma is a slowly progressing disease of the subcutaneous tissues that is caused by a variety of fungi.
b. The term Madura foot has been used to describe the foot lesion.
c. Although several fungi (pigmented or hyaline) have been isolated from persons who have mycetoma, Pseudalleschena boydii appears to be one of the most common hyaline molds.
d. Amongst the pigmented molds, Madurella is the most common.
e. Other foot infections that may resemble Madura foot are actinomycotic (bacterial) in nature. These are caused by Nocardia brasiliensis and Actinomadura.