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Published on: March 29, 2012
Biotypes of the dermatophyte Microsporum distortum
1Public Health Laboratory, Central Middlesex Hospital NHS Trust, London, UK.
Abstract:
During a study of the epidemiology of Microsporum canis and closely related species, sub-specific variation was demonstrated within thirteen isolates of Microsporum distortum based on the pattern of carbohydrate utilization. Strains from three continents could be differentiated by their utilization of trehalose and erythritol. Isolates from New Zealand yielded the same patterns as M. canis (Arthroderma otae (-)); examination of 120 isolates indicated that M. canis could not be biotyped by carbohydrate utilization, although limited variation had been noted. Examination of total native protein patterns by gel electrophoresis showed that variations existed within the M. distortum group; the much larger number of M. canis (A. otae (-)) strains had appeared to be homogenous.
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