Subcutaneous mycoses Flashcards
Etiologic agents are usually
saprobes
Agents are usually native to
soil
plants
decaying vegetation and wood
Infections can usually be traced to
traumatic inoculations
typical patients
works outdoors usually without shoes and with lightweight clothing
chronic localized infection of
skin
subcutaneous tissue
adjacent lymphatics
most frequently seen in residents of
tropics and subtropics
fungi are capable of producing
nodules which will ulcerate
nodules may drain into skin’s surface leading to:
secondary bacterial infections
required in diagnosis
- fungus must be seen in specimens and lesions
- fungal morphology must be consistent
therapy
combination of drugs and surgical intervention
4 types of subcutaneous mycoses
Mycetoma
Sporotrichosis
Chromoblastomycosis
Phaeohyphomycosis
Lesion appearance of Mycetoma
Tumefaction, draining sinuses
Lesion appearance of Sporotrichosis
Ulcers and smooth, painless nodules
Lesion appearance of Chromomycosis
Warty crusted nodules, microabscesses
Lesion appearance of Phaeohyphomycosis
Diverse symptoms
Microscopic elements in specimen of Mycetoma
Granules
Microscopic elements in specimen of Sporotrichosis
Asteroid bodies
Microscopic elements in specimen of Chromomycosis
sclerotic bodies
Microscopic elements in specimen of Phaeohyphomycosis
no specific elements
Lymphatic involvement of mycetoma
No, localizer
Lymphatic involvement of Sprotrichosis
Spreads along lymphatic channels
Lymphatic involvement of Chromomycosis
possible
lymphatic involvement of phaeohyphomycosis
possible
chronic granulomatous infection
mycetoma
Mycetoma commonly affects what part of the body
lower limbs
Mycetoma caused by bacteria
Actinomycetoma
Mycetoma caused by fungi
Eumycetoma
Etiologic agents of Actinomycetoma
Nocardia brasiliensis
Actinomadura
Streptomyces
Actinomyces
Etiologic agents of Eumycota
Madurella spp.
Pseudarella boydii
Curvularia spp
Acremonium spp
Fusarium spp
Exophiala jeanselmei
