[Skip to Content]
Access to paid content on this site is currently suspended due to excessive activity being detected from your IP address 35.175.191.72. Please contact the publisher to request reinstatement.
[Skip to Content Landing]
Article
June 1931

MORPHOLOGIC VARIATION WITHIN THE SAME SPECIES OF DERMATOPHYTE AS OBSERVED IN HANGING-DROP CULTURES

Author Affiliations

PHILADELPHIA

From the Laboratory of Dermatological Research and the Laboratory of Hygiene, University of Pennsylvania.

Dr. Fred D. Weidman of the Laboratory of Dermatological Research gave continued assistance during the course of this work.

Arch Derm Syphilol. 1931;23(6):1076-1086. doi:10.1001/archderm.1931.03880240057008
Abstract

The identification of species of dermatophytes depends largely on the formation of special reproductive bodies known as "organes." The variability of these in hanging-drop cultures has long been a subject of concern. In our experiments, although four plantings were made and grown under apparently identical conditions, this variation still continued.

It was realized that whereas conditions seem identical in a quadruplicate set of hanging-drops, there was still enough variation in the drop to influence such capricious plants as these dermatophytes. The theoretical factors subject to variation, such as humidity, amount of oxygen, size of explant, etc., will be discussed later.

Considering only the species employed in this study (Trichophyton interdigitale, Trichophyton purpureum and Microsporon audouini), the following list includes all organes encountered. The terminology throughout this paper is that of Sabouraud.1

  1. Arthrospores. Special hyaloid residual bodies in hyphae.

  2. Fuseaux. Large multicellular fusiform spores.

  3. Chlamydospores. Spores of

×