On the non-identity of the parasites met with in Favus, Tinea Tonsurans, and Pityriasis Versicolor : including, proofs derived from the occurrence of these diseases amongst the lower animals, and their transmission from them to man / by Dr. M'Call Anderson.

  • Anderson, McCall, 1836-1908.
Date:
1866
Catalogue details

Licence: Public Domain Mark

Credit: On the non-identity of the parasites met with in Favus, Tinea Tonsurans, and Pityriasis Versicolor : including, proofs derived from the occurrence of these diseases amongst the lower animals, and their transmission from them to man / by Dr. M'Call Anderson. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    perfect instruments, to appreciate with jjrecision the differ- ences whicli may exist between them. And yet, as far as my experience goes, the differences between the micro- scopical appearances of the Achorion, the Tricophytoriy and the Microspoi'on furfur, are very considerable. Thus, to take an instance derived from the spores: those of the achorion are, on an average, about the 3000th of an inch in diameter, and many of them are oval; those of the tricophyton, on the other hand, are much smaller, being, on an average, about the 7000th of an inch in diameter, while the spores of the microsporon furfur, although nearly as large as those of the achorion, are more uniformly rounded, and have a remarkable and characteristic tendency to run together, so as to form clusters, like bunches of grapes. Other differences in the microscopical appearances I miglit mention, which must be familiar to those who have carefully studied the subject of parasitic diseases of the skin with the microscope ; but it is unnecessary to enlarge further on this subject, holding, as I do, that the proofs derived from a microscopical examination are of secondary value in the determination of the point at issue, and I conclude with the observation, that if carefully prepared microscopical speci- mens of the Achorion, the Tricophyton, and the Micro- sporon furfur, and of these only, were handed to me, and I ■were allowed to use my own microscope, I think I could generally arrive at a correct diagnosis of the disease from the microscopical appearances alone. Curiously enough, the morning after the above was written,