Medical Microbiology and Immunology

, Volume 174, Issue 5, pp 267–274 | Cite as

Prevalence ofGemella haemolysans on the pharyngeal mucosa of man

  • U. Berger


By culturing pharyngeal swabs from 199 students a carrier rate forGemella haemolysans of 29.7% was detected. Demonstration of hemolysis depended on blood species and on agar base. Optimum growth was obtained under aerobic conditions in a 10% CO2-enriched atmosphere. The cells divided in two planes which were not regularly at right angles to each other. They appeared to be surrounded by a small capsule. Contrary to earlier descriptions, acid was produced from galactose, acetoin was produced by practically all strains and nitrite was reduced by all strains. Acid production from trehalose and N-acetyl-glucosamine, alkaline and acid phosphatase, C4 and C8 esterase, pyrrolidone arylamidase and phosphoamidase activities were detected. In tube precipitation, antigenic relations between type strain and the new isolates were demonstrated.


Nitrite Galactose Trehalose Type Strain Acid Production 
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Copyright information

© Springer-Verlag 1985

Authors and Affiliations

  • U. Berger
    • 1
  1. 1.Abteilung BakteriologieHygiene-Institut der Universität HeidelbergHeidelbergFederal Republic of Germany

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