What is Baird Parker agar used for?
What is Baird Parker agar used for?
Baird–parker agar is a selective medium for the enumeration of Staphylococcus aureus in foods and this was first reported by Baird–Parker. It is widely recommended by national and international bodies. Selectivity is attained with potassium tellurite and lithium chloride.
Why does Baird Parker Agar contain lithium chloride potassium tellurite and egg yolk emulsion?
Lithium chloride and potassium tellurite inhibit most of the contaminating microflora except Staphylococcus aureus. The tellurite additive is toxic to egg yolk-clearing strains other than S. aureus and imparts a black color to the colonies. Glycine, pyruvate enhances the growth of Staphylococcus.
What organisms can be differentiated on Baird Parker Agar?
Baird Parker Agar is used for the isolation and differentiation of coagulase-positive staphylococci in food and pharmaceuticals according to the Baird Parker method. As a nitrogen source for the organism, casein peptone and meat extract are added to the medium.
How do you make Baird Parker Agar?
Procedure for preparation of the media
- Suspend desired quantity (as per manufacturers instruction) of the medium in 950 ml purified water.
- Heat with frequent agitation and boil for one minute to completely dissolve the medium.
- Autoclave at 121°C for 15 minutes.
Which of the following components of Baird-Parker Agar cause the observation of opaque zone around colonies?
Lecithinase
Lecithinase breaks down lecithin and produces an insoluble precipitate resulting in opaque zones in the medium surrounding the colonies. Proteolytic activity can be observed on this medium as clear zones surrounding the colonies.
Which of the following components of Baird Parker Agar cause the observation of opaque zone around colonies?
What is the formula for Tellurite?
O₃Te²⁻
Tellurite/Formula
What acts as the elective component in Baird Parker Agar?
Baird-Parker agar is a type of agar used for the selective isolation of gram-positive Staphylococci species. It contains lithium chloride and tellurite to inhibit the growth of alternative microbial flora, while the included pyruvate and glycine promote the growth of Staphylococci.
What is tellurite blood agar used for?
Tellurite Blood Agar is a selective medium used for isolation and cultivation of Corynebacterium species. Potassium tellurite acts as a selective agent and has inhibitory activity against most gram-positive and gram-negative bacteria except Corynebacterium species. C.diphtheriae reduces potassium…
What is Corynebacterium diphtheriae on tellurite agar?
Corynebacterium diphtheriae on tellurite agar. 6 years ago by Dr.E.I 0. Tellurite Blood Agar is a selective medium used for isolation and cultivation of Corynebacterium species. Potassium tellurite acts as a selective agent and has inhibitory activity against most gram-positive and gram-negative bacteria except Corynebacterium species.
What is Remel cystine tellurite blood agar?
CYSTINE TELLURITE BLOOD AGAR INTENDED USE Remel Cystine Tellurite Blood Agar is a solid medium recommended for use in qualitative procedures for the isolation and cultivation of Corynebacterium diphtheriae. SUMMARY AND EXPLANATION
What does potassium tellurite do to Corynebacterium?
Potassium tellurite acts as a selective agent and has inhibitory activity against most gram-positive and gram-negative bacteria except Corynebacterium species. C.diphtheriae reduces potassium tellurite to tellurium and thereby produce gray-black coloured colonies.
