Question

Your outdoor pond filled with ornamental carp has just become the sight of an aquacultural disaster. Eighty percent of your prized (and expensive!!!) fish have succumbed to an unknown disorder. You decide to rush the dead fish to the microbiology lab and try to determine if bacteria may have been the cause. From each of the dead fish, you isolate and obtain pure cultures of four different types of bacteria (A, B, C, D). You also decide to test some of your healthy fish and obtain pure cultures of bacterial types A and D. You decide:

a. That bacterial types Band C must be the cause of death
b. That bacterial type B must be the cause of death
c. To infect some healthy fish with type B, some with type C, and some with both Band C, to see if any of these infections results in the death of the healthy fish.
d. To perform the infections in choice C., and then see if you can isolate the bacteria that you introduced from any fish that may have died.
e. To quit keeping ornamental carp! Clear my choice

Answer 1

c. To infect some healthy fish with type B, some with type C, and some with both Band C, to see if any of these infections results in the death of the healthy fish

Step-by-step explanation:

First of all bacterial samples A and D have been said to befound in healthy fish by the question. So these two samples can not be the cause of he death of these fishes.

So out of these bacteria samples A,B,C,D, we are left with bacterial samples B and c to be the cause of death.

To get the cause of death we have these 3 options

1. to intoduce sample B into healthy fish
2. to introduce c into healthy fish
3. to introduce both B and C into healthy fish.

We do all of these 3 three above to know what is responsible for the deaths.