Abstract
Elongation phenomena of M. lepraemurium in vitro were observed using silicon -coated slide glasses compared to common slides. The results obtained indicate that M. lepraemurium promptly shortened after being smeared on the silicon slide glasses, and that remarkable elongation of M. lepraemurium on the silicon slide was observed only in the medium which was the most appropriate for elongation of the bacilli studied by using common slides. It could be noted from the results mentioned above that these findings might demonstrate that the bacilli fixed more faster on the silicon slide than on the common slide. On the other hand, it could be said that subtle morphological changes in the bacilli during cultivation might be missed if the silicon slide was used for observation of the bacilli.
