SS agar.

Question 1

What is SS agar?

Answer 1

SS agar is a differential and selective media which is mainly used to identify gram-negative bacteria that can utilise lactose.

Question 2

What is the basis of SS agar?

Answer 2

The basis of SS agar is that the media includes bile salts and sodium citrate to inhibit the growth of gram-positive bacteria, contains lactose and neutral red to identify gram-negative lactose fermenters and contains sodium thiosulfate and ferric citrate to detect the production of hydrogen sulphide.