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THE CULTIVATION AND BIOLOGICAL CHARACTERISTICS OF SPIROCHAETA OBERMEIERI (RECURRENTIS)
1Laboratories of The Rockefeller Institute for Medical Research.
The Journal of Experimental Medicine
|October 30, 2009
Summary
Researchers perfected a method to consistently cultivate Spirochaeta obermeieri from infected animals. This technique ensures organism viability for weeks and enables successful subculturing, crucial for studying this spirochete.
Area of Science:
- Microbiology
- Bacteriology
Background:
- Spirochaeta obermeieri is a bacterium requiring specific growth conditions.
- Previous cultivation methods for related spirochetes, like Leptospira, exist but need refinement for S. obermeieri.
Purpose of the Study:
- To develop and optimize a consistent method for cultivating Spirochaeta obermeieri.
- To identify and control physicochemical factors limiting S. obermeieri growth.
Main Methods:
- Utilized ascitic fluid, horse, or rabbit serum as culture media.
- Adjusted and stabilized the pH using peptone broth or egg albumin as buffers.
- Employed an oil overlay (max 1.5 cm) to control aeration for the strict aerobe.
Main Results:
- Achieved consistent cultivation of S. obermeieri from infected mice and rats.
- Maintained culture viability for 3 to 7 weeks and enabled subculturing every 2 to 4 weeks.
- Determined optimal growth conditions between pH 6.8 and 8.2, with an optimum at pH 7.2–7.4.
Conclusions:
- The perfected method allows for reliable cultivation and long-term maintenance of Spirochaeta obermeieri.
- Control of pH and aeration are critical factors for successful S. obermeieri growth.
- This technique advances the study of Spirochaeta obermeieri by providing a stable culture model.
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