Clinical Mastits Flashcards
How is mastitis classified?
Based on whether it is:
A) clinical or subclinical
B) contagious or environmental
C) infecting in the dry period or lactating period
If a bacteria is ‘host adapted’ what type of mastitis is it likely to be, give an eexaple of this type of pathogen?
It is likely to be contagious as it is not adapted to live in the environment. It is probably also more likely to cause subclinical infection. An example would be SAG
When would mastitis be classed as clinical?
When changes are seen in the udder/milk
Outline the grades of clinical mastitis.
1: milk changes only / <milk yield
2(acute): Changes in udder + above
2(chronic): as above but persistant
3: as 2 but systemically sick cow
What pathogens are of main concern in causing clinical mastitis?
SAG SDG SU SAU E.coli
More exotic ones - Klebsiella, Salmonella, yeasts, Bacillus cereus, mycoplasma
What are the signs of a subclinical mastitis?
Elevated SCC
+ve CMT
Reduced milk yield
What pathogens often cause sub clinical mastitis?
SAU
SU
SAG
Corynebacterium bovis
What needs to be determied when history taking for a case of mastitis?
Duration, development, stage of lactation & gestation, age, treatment & response, previous episodes, SCC data, other cases in herd, farm records?
What PE things need to be focussed on?
Udder (palpation and LN inspection)
Milk exam
Milk sample: CMT
What are the treatment options?
ANTIOBIOTICS
OXT NSAIDs Corticosteroids Fluids Calcium Dextrose
Which animals should have culture and sensitivity of milk?
Recurrent cases
Persistant cases
Rises in SCC
What are the different places from which milk samples could be obtained?
Bulk tanks
Pooled sample of one cow
Individual quater sample
