Milk quality Flashcards
Pathogens that can be picked up from milk/dairy products
-bovine TB - N
-camplyobacteriosis - N
rat bite fever - N
zoonotic diptheria - N
campylobacter
salmonella
Steps of circulation cleaning in milking plant
warm rinse , hot wash cycle , alkaline detergent , cold rinse
What does alkaline wash do ?
stops build up of milk fat residue and bacteria
How to get rid of mineral deposits ( milk spots ) ?
acid boil wash
What does an increased coliform count in the bulk milk tank indicate
inadequate teat prep prior to milking
High temperature short time ( HTST ) pasteurisation ?
high temp for short time so all microorganisms and their spores
* check - shouldn’t be any ALP - alkaline phosphatase
TRUE/FALSE pasteurisation hardly effects nutritional value of milk
true
TRUE/FALSE main health concerns about milk come from drinking raw milk or milk faulty processing
true
What test can be used to test for antibiotic residues ?
delvotest - look at colours ( yellow negative , purple positive )
total bacterial count (TBC )
measure live bacteria - count of colonies on plate
Bactoscan
viable and non-viable bacteria and ones that won’t grow in TBC
What does psychrotrophic count indicate ?
bulk tank problem - if high shows bacteria that grow at low temperatures - inadequate cooling or bad bulk tank cleanign
What does high thermoduric count indicate?
organisms that grow at high temp - problem plant cleaning
What does a very very high TBC and lots of strep( gram positive ) indicate ?
missed mastitis events
