Question

5. Counting plates 6-13. Give the Aerobic Pl using the 30-300 colony criterion: followin ate Count and applicable rule section from Part D of Exercise 1 for each of the fol Colonies/Dilution 10-2 Aerobic Plate Applicable Count/g Section No. No. 10-1 6. 14 20 7. 109 Spr 12 285 235 190 184 10 15 10 10 0 0 10. 0 TNTC TNTC 7500 8500 TNTC 12. 30 35 10 0 14. Hamburger freshly ground under, the best conditions often has a bacterial count of 1000-10,000 per g due to contamination If your sample had 10 bacteria per g, could this number have been just contamination or would the cell present have had to grow? Why? Give a good reason for your answer.

Answer 1

1.5

Sample representation:

1. If I don't mark the strain /sample it would be difficult for identification

2. Sample representation also includes date . Date is mandatory to mark coz some strain have a tendency to loose its characteristics after many days so marking wrong date may be a error

Dilution bottle.

1. If dilution bottle has crack in the bottom

2. If colour of dilution bottle is dark it is hard to measure the volume accurately.