Question

For detection of Salmonella, enrichment culture is subcultured on the following
media except
(a) BSA
(b) DCA
(c) VJA
(d) XLDCA​

Answer 1

Answer:

C is the correct answer

Explanation:

hope is will help you

Answer 2

Answer:

Correct option - (c) VJA

The salmonella bacteria can grow over BSA, DCA, and, XLDCA culture mediums. It cannot grow on VJA (Vegetable Juice Agar). Thus, VJA cannot detect Salmonella.

Explanation:

Salmonella grows very well on BSA (Bismuth Sulphite Agar) medium with black or brown colonies.

Salmonella grows in yellow or colourless colonies with black centres on DCA (Deoxycholate Citrate Agar) medium.

Salmonella grows best in xylose lysine deoxycholate (XLD) agar with red colonies and some with black centres. The drastic change is the conversion of the whole agar colour into red.

Only VJA cannot determine the presence of salmonella as they cannot grow over VJA.