indiv mastitis Flashcards
what is mastitis?
inflammation of udder
- chemical, mechanical/thermal injury
- infection by microorganisms
what are the 2 types of mastitis?
clinical
subclinical
what is clinical mastitis?
presence of visibly abnormal milk
watery/thickened/discoloured w blood, pus, flakes or clots
udder: swollen, firm, redness, hot, firm, pain, reduced size latterly
cow normal to systemic ill (fever, dehydration, weakness, inappetence)
what is subclin mastitis?
no visible changes in milk - BUT high SCC in milk
mammary gland feels normal
“invisible enemy”
what agent will cause cows to be pyrexic & v septicaemic for mastitis?
commonly E. Coli in UK
how to test for subclin. mastitis?
rapid mastitis test
herd test/milk test results
condutivity meter
identified by elevated milk APP & biochem changes in affected quarter
what is another name for rapid mastitis test
california mastitis test
what SCC no. is deemed uninfected?
< or = 100,000cells/ml
what SCC no. is deemed infected?
> 200,000 cells/ml
infected w sig. pathogens >300,000 cells/ml
severity scoring system for mastitis: score 1 =?
mild: abnormal milk (clots, flakes, watery…)
severity scoring system for mastitis: score 2=?
moderate: abnormal milk & signs of udder inflammation (heat, swelling, pain)
severity scoring system for mastitis: score 3=?
systemic illness (fever, dehydration, weakness, inappetence)
one clin case of mastitis means?
1 infected quarter
if 2 quarters in same cow = 2 cases
“new case” of mastitis =?
> or = 8d passed from prev clin case
“recurrent” case of mastitis =?
< or = 7d passed from prev clin case
chronic case of mastitis =?
long term recurring persistent cases of dx
new case of subclin mastitis =?
increase from <200,000 SCC to >200,000 SCC
what does >200,000 SCC indicate?
1 or more quarters infected
chronic case of subclin mastitis =?
3 or more consecutive milk records w SCC >200,000cells/ml - ‘problem cows’
transmission routes of mastitis?
haematogenous - infreq. e.g. Tb, lepto
teat canal - majority of pathogens
RMT 0 =?
no gel/slime
SCC = <400,000 cells/ml
RMT 1=?
a little slime
800,000 cells/ml SCC
RMT 2=?
mod slime
2mil cells/ml SCC
RMT 3=?
heavy slime
>2mil SCC
