Milk Hygiene Flashcards
What milk is regulated by the pasteurized milk ordinance and is for liquid consumption
Grade A
What are the regulations for grade A milk?
Cooled to 7C within 2hrs
Somatic cell count less than 750,000/mL
Bacterial count <100,00/mL
T/F: grade B milk is for liquid consumption
False
Used for cheeses and cooked foods
What are causes of a high bacterial count in milk?
Milking dirty cows Water temp and volume low Cracked rubber parts, dirty gaskets, inadequate cleansing of milk tak Mastitis Biofilms
How is milk stored primor to transport
Refrigerated on farm up to 4 days
How is sediment removed from milk?
Clarifier
- centrifugal device
- > remove dirt, straw, blood, somatic cells, and manure
Milk is separated based on?
Amount of fat
The temperature of milk is based on the thermal death of what bacteria?
Coxiella burretii
What is the purpose of pasteurization?
Destroy pathogens
Inactivate enzymes
Enhance shelf life
What type of pasturizaiton holds milk in a vat for lower temperatures for a long period of time
Batch
What type of pasteurization flows milk though heated tubes?
High temp, short life
After pasteurization milk is cooled. What should the bacterial counts be?
<20,000 bacteria /mL
<10 coliform bacteria / mL
What is the bacterial limit for cheese/cottage cheese ?
No bacterial limit ; except coliforms <10/ml
What are common causes of mastitis?
S. Aureus Strep spp Ecoli Klebsiella Mycoplasma Serratia
What condition is characterized by increased blood proteins in milk and increased leukocytes with lower milk yield
Mastitis
