330 .
RUMEN BACTERIA MEDIUM
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Selected strain: Lachnospira sp. DSM 116331
This strain uses the standard medium without modifications.
Growth conditions: anaerobic
37 °C
Equipment needed:
Autoclave
Filter
Gassing station
Hungate tubes
Final gas composition:
100 % CO2
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Final pH:
6.7 - 6.8
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ml
| Compound | Amount | Unit | |||
|---|---|---|---|---|---|
|
|
Mineral solution | 38.00 | ml | ||
|
|
K2HPO4 | 0.30 | g | ||
|
|
Trypticase peptone
(BD BBL) |
2.00 | g | ||
|
|
Yeast extract
(OXOID) |
0.50 | g | ||
|
|
Volatile fatty acid mixture | 3.10 | ml | ||
|
|
Haemin solution
(0.05% w/v) |
2.00 | ml | ||
|
|
Glycerol | 0.50 | g | ||
|
|
Sodium resazurin
(0.1% w/v) |
0.50 | ml | ||
|
|
Na2CO3 | 4.00 | g | ||
|
|
D-Glucose | 0.50 | g | ||
|
|
Maltose | 0.50 | g | ||
|
|
Cellobiose | 0.50 | g | ||
|
|
Starch , soluble | 0.50 | g | ||
|
|
L-Cysteine HCl x H2O | 0.25 | g | ||
|
|
Na2S x 9 H2O | 0.25 | g | ||
|
|
Distilled water | 960.00 | ml | ||
| 1 Dissolve ingredients (except carbonate, glucose, maltose, cellobiose, soluble starch, cysteine and sulfide), then sparge medium with 100% CO2 gas for 30 - 45 min to make it anoxic. Add the carbonate and equilibrate the medium with the CO2 gas to pH 6.8. Distribute under 100% CO2 gas atmosphere into anoxic Hungate-type tubes or serum vials and autoclave. Thereafter, add glucose, maltose, cellobiose, soluble starch, cysteine and sulfide from sterile anoxic stock solutions prepared under 100% N2 gas atmosphere. Adjust pH of complete medium to 6.7 - 6.8, if necessary. | |||||
Mineral solution #
1000
| Compound | Amount | Unit | |
|---|---|---|---|
|
|
KH2PO4 | 6.0 | g |
|
|
NaCl | 12.0 | g |
|
|
(NH4)2SO4 | 6.0 | g |
|
|
CaCl2 x 2 H2O | 1.6 | g |
|
|
MgSO4 x 7 H2O | 2.5 | g |
|
|
Distilled water | 1000.0 | ml |
Volatile fatty acid mixture #
1000
| Compound | Amount | Unit | |
|---|---|---|---|
|
|
Acetic acid | 548.50 | ml |
|
|
Propionic acid | 193.50 | ml |
|
|
Butyric acid | 129.00 | ml |
|
|
n-Valeric acid | 32.25 | ml |
|
|
iso-Butyric acid | 32.25 | ml |
|
|
DL-2-Methylbutyric acid | 32.25 | ml |
|
|
iso-Valeric acid | 32.25 | ml |
Haemin solution #
100
| Compound | Amount | Unit | |||
|---|---|---|---|---|---|
|
|
Haemin | 50 | mg | ||
|
|
NaOH
(1 N) |
1 | ml | ||
|
|
Distilled water | 100 | ml | ||
| 1 Dissolve 50 mg haemin in 1 ml 1 N NaOH; make up to 100 ml with distilled water and filter sterilize. Store refrigerated. | |||||