D3435

Millipore

Dey-Engley neutralizing broth

suitable for microbiology, NutriSelect® Plus

NACRES:
NA.85

Quality Level

sterility

non-sterile

form

powder

shelf life

limited shelf life, expiry date on the label

manufacturer/tradename

NutriSelect® Plus

application(s)

microbiological culture: suitable
microbiology: suitable
sterility testing: suitable
surface monitoring: suitable

final pH

7.6±0.2 (25 °C)

Featured Industry

Environmental
Food and Beverages
Pharmaceutical

storage temp.

2-8°C

suitability

nonselective for Bacillus spp.
nonselective for Escherichia coli
nonselective for Pseudomonas spp.
nonselective for Salmonella spp.
nonselective for Staphylococcus spp.
nonselective for bacteria (General Media)
nonselective for coliforms

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Application

Dey-Engley neutralizing broth has been used to premoisten the sponge swab samples to neutralise the residual action of the disinfectants on the microbiological growth. It has also been used to resuspend the Vermamoeba (Hartmannella) vermiformis cysts to neutralize peracetic acid (PAA).
Dey-Engley Neutralizing Broth is used in disinfectant testing where neutralization of the antiseptics and disinfectants is important for determining bactericidal activity.

Biochem/physiol Actions

The Dey-Engley Neutralizing Broth neutralizes a broad spectrum of antiseptics and disinfectants including, quaternary ammonium compounds, phenolics, iodine, chlorine, mercurials, formaldehyde and glutaraldehyde. Sodium thioglycollate, sodium thiosulphate, sodium bisulphite, soya lecithin and polysorbate 80 act as neutralizing components. Growth is indicated by a color change from purple to yellow.

Components

Ingredients(g/L)
Casein enzymatic hydrolysate5.00
Yeast extract2.50
Dextrose10.00
Sodium thiosulfate6.00
Sodium thioglycollate1.00
Sodium bisulfite2.50
Lecithin7.00
Polysorbate 805.00
Bromocresol purple0.02

Preparation Note

Suspend 39 g of Dey-Engley Neutralizing Broth in 1000 ml of distilled water. Boil to dissolve the medium completely. Sterilize by autoclaving 15 lbs. pressure (121°C) for 15 minutes.

Legal Information

NutriSelect is a registered trademark of Merck KGaA, Darmstadt, Germany

Pictograms

Exclamation mark

Signal Word

Warning

Hazard Statements

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

RIDADR

NONH for all modes of transport

WGK Germany

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis
Certificate of Origin
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Comparison of competitive exclusion with classical cleaning and disinfection on bacterial load in pig nursery units
Luyckx K, et al.
BMC Veterinary Research, 12(1), 189-189 (2016)
Sensitivity of Vermamoeba (Hartmannella) vermiformis cysts to conventional disinfectants and protease
Fouque E, et al.
Journal of Water and Health, 13(2), 302-310 (2015)
A 10-day vacancy period after cleaning and disinfection has no effect on the bacterial load in pig nursery units
Luyckx K, et al.
BMC Veterinary Research, 12(1), 236-236 (2016)
H Maertens et al.
BMC veterinary research, 16(1), 140-140 (2020-05-20)
Disinfectants are frequently used in animal production to reduce or eliminate the load of infectious agents and parasites in buildings and equipment associated with the housing or transportation of animals. There are growing concerns that the use of disinfectants would...
Articles
An article concerning the detection, identification, differentiation, and cultivation of Pseudomonas species.
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