<prompt> Example of selective medium is -LJ mediumBlood agarRobertsons cooked meat mediaChocolate agar  <response>: Ans- A Ref- SELECTIVE MEDIA Those culture media that permits the required bacterium to grow and selectively inhibit unwanted commensals and contaminants are termed selective media. When the same approach is employed for liquid culture medium, it is called enrichment broth. Any medium can be made selective by addition of some inhibitory substances or altering its property. Some selective media also behave as indicator media. Various techniques are employed to make a medium selective. These are: Addition of antibiotics Addition of chemicals Addition of dyes Altering the pH Combination of any of the above Selective media containing antibiotics: Name of the medium Selective for Antibiotics Thayer Martin Agar N.gonorrhoeae Vancomycin, Colistin, Nystatin PNF Medium b-hemolytic Streptococci Polymyxin B, Neomycin, Fusidic Acid Charcoal Blood Agar B.pertussis Cephalexin Modified New York City Medium N.gonorrhoeae Colistin, Lincomycin, Trimethoprim and Amphotericin B Kniselys Medium PLET B.anthracis Polymyxin B Kirchner Medium M.tuberculosis Polymyxin B, Carbenicillin, Trimethoprim and Amphotericin B Skirrows Medium C.jejuni Vancomycin, Polymyxin B, Trimethoprim Selective Buffered Charcoal Yeast Extract Agar Legionella pneumophila Vancomycin, Polymyxin B Selective media containing chemicals Name of the medium Selective for Chemical Mannitol Salt Agar, Salt Milk Agar S.aureus 10 NaCl Potassium tellurite medium Hoyles, Tinsdale C.diphtheriae 0.04 Potassium tellurite McConkeys Agar low selective Enterobacteriaceae Bile salt XLD Agar, DCA Salmonella, Shigella Bile salt Pseudosel Agar Cetrimide Agar P.aeruginosa Cetrimide Pseudomonas Isolation Agar P.aeruginosa Irgasan Monsurs Tellurite Taurocholate Gelatin Agar V.cholerae Potassium tellurite Bile Esculin Agar Enterococci Bile salt Selective media containing dyes Name of the medium Selective for Dye Crystal Violet Blood Agar S.pyogenes 0.0002 crystal violet Lowenstein Jensen Medium M.tuberculosis Malachite green Wilson Blairs Brilliant Green Bismuth Suphite Agar S.typhi Brilliant green Selective media with altered pH Name of the medium Selective for pH TCBS Agar V.cholerae 8.6 Monsurs Tellurite Taurocholate Gelatin Agar V.cholerae 8.5 