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Halanaerobium acetethylicum (Rengpipat et al.) Rainey et al.


Product category
Product type
Strain designation
EIGI [DSM 3532]
Type strain
Isolation source
Oil-injection water filter in offshore oil rig
Geographical isolation
United States; Louisiana
Product format


ATCC determines the biosafety level of a material based on our risk assessment as guided by the current edition of Biosafety in Microbiological and Biomedical Laboratories (BMBL), U.S. Department of Health and Human Services. It is your responsibility to understand the hazards associated with the material per your organization’s policies and procedures as well as any other applicable regulations as enforced by your local or national agencies.

ATCC highly recommends that appropriate personal protective equipment is always used when handling vials. For cultures that require storage in liquid nitrogen, it is important to note that some vials may leak when submersed in liquid nitrogen and will slowly fill with liquid nitrogen. Upon thawing, the conversion of the liquid nitrogen back to its gas phase may result in the vial exploding or blowing off its cap with dangerous force creating flying debris. Unless necessary, ATCC recommends that these cultures be stored in the vapor phase of liquid nitrogen rather than submersed in liquid nitrogen.

Detailed product information


Specific applications


Extremophile type

Handling information

Handling procedure
1. Open the vial according to enclosed instructions.

2. Perform all steps under anaerobic conditions.

3. Aseptically transfer 0.5 ml of #1476 broth to the vial and rehydrate the pellet.  Transfer the suspension back into the broth tube.  Inoculate a plate of a non-selective medium such as Tryptic Soy, Nutrient, or blood agar with 0.1 ml of the cell suspension.

4. Seal the tube with a rubber stopper and incubate anaerobically at 30oC.  Incubate the plate(s) aerobically as a purity check.

5. After two or three days, growth should be evident as indicated by turbidity. Initial growth can take 7 days

6. When the culture exhibits good growth it will remain viable for up to 1 week if stored at 4oC under anaerobic condition.


·   Tubes of media are placed under a gassing cannula system hooked to a source of oxygen free gas.

·   All transfers are performed while the test tubes are on the cannula system with a gentle stream of oxygen free gas flowing through the system.

·   As the test tubes are removed from the cannula system each is sealed with butyl rubber stopper thus maintaining the anaerobic headspace.

Handling notes
Cells after growth on Medium #1476 are motile rods.  Colonies are raised, circular, and non-pigmented.  No growth should occur below 5% NaCl.

Always use freshly prepared anaerobic medium.  If there is any question about the anaerobic condition of the medium, the medium can be reduced with the addition of 1.5% cysteine

(2.0 ml per 100 ml of medium). 

Other commonly used reducing agents are sodium sulfide, cysteine, dithiothreitol, and titanium citrate.  Cysteine is the reducing agent of choice since it does not cause the ferrous ammonium sulfate to precipitate.


Deposited as
Halobacteroides acetoethylicus Rengpipat et al.
JG Zeikus
Cross references
GenBank U86448 Haloanaerobium acetoethylicum 16S ribosomal RNA gene, partial sequence.

Legal disclaimers

Intended use
This product is intended for laboratory research use only. It is not intended for any animal or human therapeutic use, any human or animal consumption, or any diagnostic use.

The product is provided 'AS IS' and the viability of ATCC® products is warranted for 30 days from the date of shipment, provided that the customer has stored and handled the product according to the information included on the product information sheet, website, and Certificate of Analysis. For living cultures, ATCC lists the media formulation and reagents that have been found to be effective for the product. While other unspecified media and reagents may also produce satisfactory results, a change in the ATCC and/or depositor-recommended protocols may affect the recovery, growth, and/or function of the product. If an alternative medium formulation or reagent is used, the ATCC warranty for viability is no longer valid.  Except as expressly set forth herein, no other warranties of any kind are provided, express or implied, including, but not limited to, any implied warranties of merchantability, fitness for a particular purpose, manufacture according to cGMP standards, typicality, safety, accuracy, and/or noninfringement.


This product is intended for laboratory research use only. It is not intended for any animal or human therapeutic use, any human or animal consumption, or any diagnostic use. Any proposed commercial use is prohibited without a license from ATCC.

While ATCC uses reasonable efforts to include accurate and up-to-date information on this product sheet, ATCC makes no warranties or representations as to its accuracy. Citations from scientific literature and patents are provided for informational purposes only. ATCC does not warrant that such information has been confirmed to be accurate or complete and the customer bears the sole responsibility of confirming the accuracy and completeness of any such information.

This product is sent on the condition that the customer is responsible for and assumes all risk and responsibility in connection with the receipt, handling, storage, disposal, and use of the ATCC product including without limitation taking all appropriate safety and handling precautions to minimize health or environmental risk. As a condition of receiving the material, the customer agrees that any activity undertaken with the ATCC product and any progeny or modifications will be conducted in compliance with all applicable laws, regulations, and guidelines. This product is provided 'AS IS' with no representations or warranties whatsoever except as expressly set forth herein and in no event shall ATCC, its parents, subsidiaries, directors, officers, agents, employees, assigns, successors, and affiliates be liable for indirect, special, incidental, or consequential damages of any kind in connection with or arising out of the customer's use of the product. While reasonable effort is made to ensure authenticity and reliability of materials on deposit, ATCC is not liable for damages arising from the misidentification or misrepresentation of such materials.

Please see the material transfer agreement (MTA) for further details regarding the use of this product. The MTA is available at

Frequently Asked Questions


Curated Citations

Validation list no. 29. Int. J. Syst. Bacteriol. 39: 205-206, 1989.

Rengpipat S, et al. Halobacteroides acetoethylicus sp.nov., a new obligately anaerobic halophile isolated from deep subsurface hypersaline environments. Syst. Appl. Microbiol. 11: 28-35, 1988.

Validation list no. 55. Int. J. Syst. Bacteriol. 45: 879-880, 1995.

Rainey FA, et al. The taxonomic study of the fermentative halophilic bacteria: description of Haloanaerobiales ord. nov., Halobacteroidaceae fam. nov., Orenia gen. nov. and further taxonomic rearrangements at the genus and species level. Anaerobe 1: 185-199, 1995.

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