UdderCheckTM measures Lactate Dehydrogenase (LDH), an
present in milk when cells are damaged during an udder infection. LDH is correlated to SCC,
but is not as easily affected by other conditions such as stress, nutrition, parity, stage of lactation, etc.
LDH levels often rise earlier than somatic cell counts, making it an excellent marker for early detection
of udder infections. Several milking systems have recently incorporated the measurement of LDH as
an early indicator of mastitis and to monitor udder health.
The reagent pad on the test strip contains the
immobilized substrate, L-lactate. Through a series of
reactions, this substrate is oxidized by lactate dehydrogenase (LDH) in the milk, while simultaneously, the indicator
nitrotetrazolium blue is reduced to a purple formazan. The end color intensity of the formazan is proportional to the
concentration of lactate dehydrogenase in milk.