Question

4. Which substance makes enteric plates selective for enteric bacteria? Bacteria Lactose fermenter/non- fermenter (+) or EMB Identified (color) HE Identified (color) Identified (color) Lysine Identified (color) 5. E.coli 6. Enteroacter 7. Salmonella 8. Shigella 9. Proteus 10. Give an example of infections transmitted by propagation 11. Give an example of infections transmitted by common source pattern

Answer 1

4. HEA media i.e. hektoen enteric agar makes enteric plates for selective enteric bacteria.

5. E. coli

EMB - green sheen.

HE - bright orange

Urea - yellow (no change)

lysine - purple.

7. Salmonella

HE - blue-green

EMB - colorless

non-lactose fermenter

urea - yellow (no change)

8. Shigella

HE - greenish-blue

urea - yellow (no change)

non-lactose fermenter

10. Typhoid, respiratory illness, and malaria are examples of infection transmitted by propagation.

11. Food-borne infections are an example of a point or a common source pattern. the illness that is transmitted from a common source, like that from a restaurant.