PC Agar Is a Selective Media for Isolation of B

question 21

Multiple Choice

PC agar is a selective media for isolation of B.cepacia.What is the purpose of the polymixin B and ticarcillin in the media?

• A)They provide nutrients to enrich the growth of B.cepacia.
• B)They cause color change in the media from yellow to pink.
• C)They inhibit growth of gram-positive and other gram-negative organisms.
• D)They stabilize the media to support growth if prolonged incubation is needed.