Mastitis Flashcards
(21 cards)
What is the legal SCC bulk tank limit?
750,000 cells/ml
How does SCC correlate to percentage of milk loss?
Subclinical Mastitis
Milk normal grossly
No systemic signs
Elevation in SCC
Mild Clinical Mastitis
Abnormal milk
Elevation in SCC
Moderate Clinical Mastitis
Abnormal milk
Inflamed gland
Severe Clinical Mastitis
Abnormal milk and gland +/- animal
PE to assess systemic signs of endotoxemia
California Mastitis Test
Somatic Cell Count
Normal < 100,000 cells/ml
Acute mastitis > 10,000,000
Chronic mastitis > 500,000 to 2,000,000
What are the most common contagious mastitis pathogens?
Strep ag
Mycoplasma
What are the most common environmental mastitis pathogens?
Coliforms
T. pyogenes
Psuedomonas
What is the single most effective practice to reduce incidence of contagious mastitis?
Post-milking teat dip
Strep ag
“Classic” contagious pathogen
Primarily subclinical
Mycoplasma
Respiratory pathogen, septicemia, otitis media
Contagious
Acute = poor response to treatment
Sandy material in milk
Or chronic
No treatment
Staph aureus
Most prevalent contagious pathogen is strep ag is controlled
Microabscesses
Cream-tan colonies
Coagulase Negative Staph
Opportunistic, contagious
Increasing teat irritation or injury increases risk of infection
What are the keys to controlling environmental mastitis?
Integrity of the teat end immune defenses, along with pre-milking teat dip, clean housing, and hygienic milking practices
Streptococcus
Environmental, primarily from bedding
Uberis refractory to treatment
Coliform Mastitis
Swollen quarter, watery yellow secretion
Endotoxemia when severe
J5 Bacterin
Reduces endotoxin and bacterial numbers in infection
Reduce severity of infection
Epitopix Klebvax
Klebsiella
Reduction in infection
Trueperella Pyogenes
Environmental
Follows teat injury
Produces abscesses in quarter
Poor prognosis = chronic, necrosis
