Which of the following is an enrichment medium?
A. Alkaline peptone water
B. Loeffler serum slope
C. Deoxycholate citrate agar
D. MacConkey’s agar
Correct answer : A. Alkaline peptone water
Enrichment medium is a liquid medium which selectively favours the growth of certain pathogenic bacteria and inhibits commensal bacteria.
Loeffler’s serum slope is an enriched medium.
Deoxycholate citrate agar is a selective medium.
MacConkey’s agar is a differential medium.