| Cross Index | Gemella haemolysans |
| SuperSet | Prokaryote, Eubacteria Gram Positive Cocci |
| Compare | They were originally
considered to be aerobic, oxidase negative, catalase
negative members of the family Neisseriaceae. We now
recognize that is has many characteristics in common with
the Streptococcaceae but it does not fit completely into
any of the genera described for this family. aerobes: Deinobacter grandis Deinococcus, Marinococcus, Micrococcus, Planococcus , Salinicoccus roseus facultative anaerobes: Aerococcus viridans, Enterococcus, Gemella haemolysans, Lactococcus Leuconostoc, Melissococcus pluton, Pediococcus, Saccharococcus thermophilus, Staphylococcus, Stomatococcus mucilaginsos, Streptococcus, Trichococcus flocculiformis, Vagococcus anaerobes Coprococcus, Peptococcus niger , Peptostreptococcus, Ruminococcus, Sarcina Catalase positive:Deinococcus, Micrococcus, Planococcus, Staphylococcus,, Stomatococcus mucilaginsosus
|
| Contrast | Micrococcaceae are not a coherent group. Micrococcus is closely related to Arthrobacter , Planococcus is related to Bacilluss, while the radioresistant cocci called Deinococcus have atypical Gram positive cell walls. |
| Subset |
| Morphology | Gemella haemolysans |
| CELLULAR |
| Staining | Gram indeterminate The cell walls show complex multi layered ultrastructures |
| Morphology | cocci in pairs or short chains. |
| Motility | |
| Specialized structures | They have a Gram positive cell wall that contains alanine in position 1 and lysine as the diamino acid |
| Division |
| COLONIAL |
| Solid surface | On blood agar the small smooth colonies ressemble beta hemolytic streptococci. A hemolysin is produced on rabbit or horse blood agar. |
| Liquid |
| Growth Parameters | Gemella haemolysans |
| PHYSIOLOGICAL |
| Tropism | |
| Oxygen | faculative anaerobe |
| pH | |
| Temperature | |
| Requirements | |
| Products | Acid is produced from several carbohydrates. no pigment is formed. |
| Enzymes | lack catalase and cytochromes. |
| Unique features |
| ENVIRONMENTAL |
| Habitat | Gemella is found in the bronchial secretions and slime of the respiratory tract |
| Lifestyle | |
| Pathogenicity | Gemella are parasites of man |
| Distribution |
| Genome | Gemella haemolysans |
| G+C Mol % | 33.5 |
| Reference | Gemella haemolysans |
| First citation | Berger, U. (1960) Neisseria
hemolysans (Thjotta and Boe 1938) Untersuchungen zur
Stellung im System. Z. Hyg. Infektionskr. Med
Mikrobiol,Immunol, Virol 146:253-259 Berger,U. (1961) A proposed new genus of gram-positive cocci: Gemella. Int Bull. Bacteriol Nomencl. Taxon 11:17-19 |
| The Prokaryotes | p |
| Bergey's Systematatic | p 1081 A. Reyn |
| Bergey's Determinative | p 528 |
| References |