. A text-book upon the pathogenic Bacteria and Protozoa for students of medicine and physicians. Bacteriology; Pathogenic bacteria; Protozoa. 38 Structure and Classification of Micro-organisms bacteriaceje and the Chlamydobacteriaceae. Some, like Petruschky, believe them to be more closely related to the true molds than to the bacteria. They are characterized by filamentous forms with real or apparent branchings. The filaments are usually regularly divided transversely, so as to appear as if composed of bacilli. The free ends only seem to be endowed with reproductive functions, and develop pec
. A text-book upon the pathogenic Bacteria and Protozoa for students of medicine and physicians. Bacteriology; Pathogenic bacteria; Protozoa. 38 Structure and Classification of Micro-organisms bacteriaceje and the Chlamydobacteriaceae. Some, like Petruschky, believe them to be more closely related to the true molds than to the bacteria. They are characterized by filamentous forms with real or apparent branchings. The filaments are usually regularly divided transversely, so as to appear as if composed of bacilli. The free ends only seem to be endowed with reproductive functions, and develop peculiar elements that differentiate the higher from the other bacteria ^hose cells are all equally free and independent. Leptothrix.—These comprise long threads which do not branch. They are not always easily separated from chains of bacilli. They rarely appear to play a pathogenic r61e, though those inhabiting the mouth occasionally secure a foothold upon the edges of the tonsillar crypts, where they grow, with the formation of persistent. Fig. -Cladotlirix, showing false branching. (From Hiss and Zinsser, Book of Bacteriology," D. Appleton & Co., publishers.) 'Text- white patches. This form of leptothrix mycosis is chronic and diffi- cult to treat. The leptothrix is a very difficult organism to secure in culture. The attempts of Vignal* and of Arustamofff were successful, but upon the usual culture-media the organisms grew very sparingly. Cladothrix.—These also produce long thread-like filaments, but they occasionally show what is described as false branching; that is, branches seem to originate from the threads, but no distinct connec- tion between the thread and the apparent branch obtains. None of the cladothrices is known to be pathogenic. They are frequent organisms of the atmospheric dust, and not infrequently appear as * "Annales de physiologic," 1886. t KoUe and Wassermann, "Handbuch der Pathogenen Mikroorganismen," 1903, II, p. 851;
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