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Food and Nutrition

Appendix G

Media Glossary
January 2006

Glossary of agars, broths and other reagents

Section E

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EC (E. Coli) Broth
Basal Medium
Tryptose or trypticase 20.0 g
Lactose 5.0 g
Bile salts no. 3 1.5 g
Di-potassium phosphate (K2HPO4) 4.0 g
Mono-potassium phosphate (KH2P04) 1.5 g
Sodium chloride (NaCl) 5.0 g
Distilled Water 1.0 L
pH 6.9 ± 0.2  

Complete Medium:

Dissolve ingredients in 1.0 L of distilled water, heating gently, if necessary, to obtain complete solution. Dispense in 10.0 mL volumes in tubes containing gas vials. Sterilize at 121oC for 15 min.

EC-MUG (4-methylumbelliferyl- β -D-glucuronide) Broth
Basal Medium
Tryptose or trypticase 20.0 g
Lactose 5.0 g
Bile salts no. 3 1.5 g
Di-potassium phosphate (K2HPO4) 4.0 g
Mono-potassium phosphate (KH2P04) 1.5 g
Sodium chloride 5.0 g
Distilled Water 1.0 L
MUG 0.05 g
pH 6.9 ± 0.2  

Complete Medium:

Dissolve ingredients in 1.0 L of distilled water, heating gently, if necessary, to obtain complete solution. Dispense in 10.0 mL volumes in tubes containing gas vials. Sterilize at 121oC for 15 min.

EF-18 (Available from Neogen)
Basal Medium
Proteose peptone 5.0 g
Yeast extract 3.0 g
L-lysine monohydrochloride 10.0 g
Dextrose 2.5 g
Sucrose 15.0 g
Magnesium sulfate . 7-hydrate (MgSO4.7H2O) 1.5 g
Bile salts 1.5 g
Sulfapyridine 0.3 g
Bromthymol blue, sodium salt 0.03 g
Novobiocin 0.015 g
Agar 15.0 g
Distilled water 1.0 L
pH 6.8 ± 0.1  

Complete Medium:

Add ingredients to 1.0 L of cold distilled water and heat to boiling to dissolve completely. Do not autoclave. Temper to 45-50oC . Verify final pH of 6.8 " 0.1 and adjust if necessary. Dispense into Petri dishes.

EHEC Enrichment broth (EEB)
Basal Medium
Tryptic Soy Broth or Tryptone Soya Broth 30.0 g
Bile salts no. 3 1.5 g
Dipotassium phosphate (K2HPO4) 1.5 g
Distilled water 1.0 L
pH 7.5 ± 0.1  
Supplements
Vancomycin (0.8g/100 mL) 1.0 mL
Cefsulodin (1.0 g/100 mL) 1.0 mL
Cefixime (1.0 mg/mL) 50.0 F l

Complete Medium:

Dissolve basal ingredients in distilled water and adjust pH to 7.5 " 0.1. Autoclave for 15 min at 121oC. Cool to 50oC and just before use add the filter sterilized antibiotics.

EIA (V. vulnificus) Wash Solution
Basal Medium
Sodium Chloride (NaCl) 87.65 g
Tween 20™ 5.0 mL
Distilled Water 10.0 L

Complete Medium:

Dissolve ingredients in 10 L of distilled water.

ELISA Buffer (for Cholera Toxin Test)
Basal Medium
Bovine serum albumin 1.0 g
Sodium chloride (NaCl) 8.0 g
Di-potassium phosphate (KH2PO4) 0.2 g
Sodium Phosphate, Dibasic (Na2HPO4) 2.9 g
Potassium chloride (KCl) 0.2 g
Distilled water 1.0 L
pH 7.4  
Supplement
Tween 20™ 0.5 mL

Complete Medium:

Add ingredients, except Tween 20 to distilled water. Mix and adjust pH to 7.4. Add Tween 20. Store frozen and thaw before use.

ENDO Agar
Basal Medium
Peptone 10.0 g
Lactose 10.0 g
Dipotassium phosphate (K2HPO4) 3.5 g
Sodium sulfite (Na2SO4) 2.5 g
Basic fuchsin 0.5 g
Agar 15.0 g
Distilled water 1.0 L
pH 7.5 ± 0.2  

Complete Medium:

CAUTION: Basic fuchsin is a potential carcinogen and care must be taken to avoid inhalation of the powdered dye and contact with the skin and eyes. Wear suitable protective clothing.

Add ingredients to 1.0 L of distilled water, heat to boiling until solution is complete. Autoclave at 121oC for 15 min. Mix thoroughly while dispensing to evenly disperse the percipitate and pour 15.0-20.0 mL amounts into Petri plates. Use immediately.