Mice, rats, guineapigs and rabbits that were apparently healthy and did not present skin lesions were examined for the presence of dermatophytes. A small proportion of them were found to be carriers of Trichophyton mentagrophytes, Trichophyton rubrum, Microsporum canis (8/140 = 5·7% of mice; 2/185 = 1·1% of rats; 1/70 = 1·4% of guineapigs; 1/215 = 0·5% of rabbits).
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