Morrison Rogosa

A selective medium for the isolation and enumeration of oral lactobacilli.

IT WOULD be highly desirable for those studying the role of lactobacilli in dental caries to have a medium that is selective for oral lactobacilli and which favors their good growth. The Hadley3 tomato juice agar modified by Jay and Arnold,4 henceforth mentioned as TJ agar, has been employed widely and is established as a valuable tool in the hands of experienced workers. However, it has been generally recognized that this medium has certain limitations. While lactobacilli may be differentiated from other microorganisms on this medium, it is not entirely selective for lactobacilli since yeasts, micrococci, streptococci, molds, gram-negative rods, sporeforming bacilli, etc., may occur with varying frequency. Thus, it may be difficult and time consuming to differentiate the lactobacilli from some of the other organisms. In the case of animal samples, plates obscured by spreading growth. sometimes occur with sufficient frequency to interfere seriously with an experimental program. This paper will describe a selective medium for the isolation and enumeration of oral lactobacilli from man and experimental animals.

The Relation of Streptococci, Lactobacilli, and the General Oral and Fecal Flora to the Progression of Dental Caries in the Hamster

LACTOBACILLI, AND THE GENERAL ORAL AND FECAL FLORA TO THE PROGRESSION OF DENTAL CARIES IN THE HAMSTER MORRISON ROGOSA, ERLING JOHANSEN, AND MURRAY N. DISRAELY WITH THE ASSISTANCE OF ALFRED J. BEAMAN National Institute of Dental Research, National Institutes of Health, Public Health Service, U. S. Department of Health, Education, and Welfare, Bethesda, Md., and University of Rochester, School of Medicine and Dentistry, Rochester, N. Y.

Abbreviations of Names of Genera Suggested for Coding Microbiological Data

A list of abbreviations of generic names appearing in the eighth edition of Bergeys Manual is presented. The list includes names of accepted genera and other genera cited as synonymous or of uncertain status. Since names of the latter still appear in the literature or are used in subspecialties of microbiology, abbreviations for these genera are also given. The abbreviations have been found useful when coding data for computer storage and analysis. Because of the saving in space, a larger number of strain characteristics can be stored in a computerized data bank. In addition, the abbreviations are often mnemonic, a helpful characteristic.

Interchange of Abbreviations and Full Generic Names in Computers

Previously, we published a list of abbreviations for genus names of bacteria. We now present the guidelines used for abbreviation construction, an expanded list of codes used for parts of genus names, and an improved list of abbreviations. An appendix contains a discussion of some methods for searching lists of abbreviations and an indication of the relative merits of the search methods.

Codes and Abbreviations for Approved or Effectively Published Names of Genera of Bacteria Published from January 1980 to October 1985 and of Generally Recognized Yeast Genera

Lists of abbreviations for genus names of bacteria and codes for commonly occurring parts of genus names are expanded to accommodate 135 new entries which are names that have been validly published since the publication of the Approved Lists of Bacterial Names in 1980. Also, 61 abbreviations of yeast genus names are included for the first time.

Directions For Coding Data

[Note 1: In the following discussion, computer manipulation of data encoded in this format are mentioned to facilitate the explanation. The programs to do so are available from one of the authors (MIK) but are not required to use this coding format.]