Trichophyton mentagrophytes var. quinckeanum

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Trichophyton mentagrophytes var. quinckeanum
A zoophilic form of T. mentagrophytes and the
cause of "mouse favus" seen on mice as thick
saucer-shaped yellow crusted lesions called
scutula. Infections in humans are usually
inflammatory and sometimes produce scutula.
Invaded hairs are rarely seen but they may show
either ectothrix or endothrix infection.
Infected human hairs do not fluoresce under
Wood's ultra-violet light, but very occasional
hairs from experimental lesions in guinea pigs
may show a pale yellow fluorescence. Distribution
Difficult to establish but probably world-wide.
Often associated with mice plagues in the
Australian Wheat Belt. Key Features Culture
characteristics, microscopic morphology, contact
with mice, odour and rapid urease test.
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