Probiotics

Question 1

LAB

Answer 1

-gram positive aeotolerant anaerobes that ferment carbohydrates producing lactic acid as their major waste product
most produce beta galactosidase to break down lactose
-lowers the pH to discourage growth of undesirable bacteria

Question 2

Probiotics

Answer 2

-live microorganisms that can be saefly consumed and under certain circumstances offer health benefits
-found in natural foods

Question 3

homolactic fermenters

Answer 3

-produce primarily lactic acid as waste products

Question 4

heterolactic fermenters

Answer 4

-produce a mixture of lactic acid, ethanol, acetic acid, and CO2

Question 5

mixed acid fermentation

Answer 5

-produce additional products that enhance the flavour or texture of cheeses

Question 6

bacteriocins

Answer 6

-antimicrobials inhibitory to dairy associated pathogens such as listeria monocytogenes

Question 7

lactobacillus and bifidobacterium gram reaction

Answer 7

-gram positive

Question 8

CFU per capsule calculation

Answer 8

Avg# of colonies x 1/dilution factor x 1/volume plated x suspension (1 mL/1 capsule)