WebPotassium tellurite is a selective agent, which inhibits most of the normal flora of the upper respiratory tract except Corynebacterium . Hoyles Medium is a highly selective medium … WebBaird-Parker agar is a type of agar used for the selective isolation of gram-positive Staphylococci species. [1] 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. [1] Staphylococcus colonies show up black in colour with ...

Biotypes of Corynebacterium Diphtheriae

WebTellurite agar, therefore, is used to select for Gram-positive organisms, and nutrient agar supplemented with penicillin can be used to select for Gram-negative organisms. Differential media are used to differentiate closely related organisms or groups of organisms. Owing to the presence of certain dyes or chemicals in the WebJan 1, 1995 · Publisher Summary. This chapter describes Baird–Parker agar as a selective and diagnostic medium for the enumeration of Staphylococcus aureus in foods. It is now widely recommended by national and international bodies. Selectivity is attained with potassium tellurite and lithium chloride and sulphamezathine is advised to suppress … heathcot medical practice address

Baird-parker agar - ScienceDirect

WebNational Center for Biotechnology Information WebPotassium tellurite is a selective agent, which inhibits most of the normal flora of the upper respiratory tract except Corynebacterium . Hoyles Medium is a highly selective medium and should be used in conjunction with a non-selective media such as Loeffler Serum Medium (M537) and Blood Agar Base… WebTellurite Tolerance Test. Principle Tolerance to tellurite is determined on agar medium containing 0.04% potassium tellurite. Very few catalase-negative gram-positive cocci … heathcot medical practice