Cristispira
| Cristispira | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Cristispira | ||||||||||||
| Gross 1910 |
Cristispira is a genus of gram negative bacteria . The cells becomevery large with a length of30 to 180 micrometers and are spirally wound with 3 to 10 revolutions. Based on this cell morphology, the genus is classified in the Spirochaetaceae family.
Way of life
There is only one species known as Cristispira pectinis . It occurs as a symbiont or commensal in the crystal stem (also crystal style) of aquatic mollusks , mainly in mussels (e.g. oysters ). Cristispira can survive for a few months under laboratory conditions, but cannot yet be cultivated successfully. The cells are obviously dependent on the host (obligatorily symbiotic). Cristispira is found in both fresh and seawater mollusks .
history
Cristispira was first described by Certes in 1882, then placed among the eukaryotes and called Trypanosoma balbiani . In 1910 Gross gave her the name Cristispira, which is still valid today . At this time, however, a multi-cell was assumed. In 1921 Noguchi finally introduced Cristispira as a bacterium to the spirochaetes.
Hosts
The following is an incomplete selection of marine mussels that serve as hosts:
- Species of clams (Veneridae):
- Types of mussels ( Mytilus )
- Types of oysters (Ostreidae)
- Ostrea lurida
- Ostrea edulis (European oyster)
- Types of pen shells ( pinna )
- Types of filet clams ( Lima )
literature
- Martin Dworkin, Stanley Falkow, Eugene Rosenberg, Karl-Heinz Schleifer, Erko Stackebrandt (Eds.) The Prokaryotes, A Handbook of the Biology of Bacteria . 7 volumes, 3rd edition, Springer-Verlag, New York et al. O., 2006, ISBN 0-387-30740-0 Vol. 7: Proteobacteria: Delta and Epsilon Subclass. Deeply Rooting Bacteria ISBN 978-0-387-25497-5
- Michael T. Madigan, John M. Martinko, Jack Parker: Brock - Microbiology . 11th edition. Pearson Studium, Munich 2006, ISBN 3-8274-0566-1