Mastitis

Question 1

a SCC count indicating inflammation:
SCC count for determining an affected quarter is:

Answer 1

> 100,000

> 200,000

Question 2

briefly explain how a CMT test works

Answer 2

the reagent causes cell lysis and causes the milk to become gel-like. score form 0-3, and a score of 0 means the SCC is below 200,000

Question 3

with subclinical mastitis, electrical conductivity ________

Answer 3

increases (more Na Cl, less K)

Question 4

what pathogens cause contagious mastitis?

Answer 4

staph aureus, strep agalactiae

corynebacrtium bovis, mycoplasma spp

Question 5

you are consulting with a farmer whose cows have mastitis. you obtained milk cultures and found strep agalactiae present. the farmer wants to know how to treat the cows and how to reduce this in his herd. you say…

Answer 5

this is a contagious pathogen and is therfore spread via the milking equipment

treat all dry cows with intramammary antibiotics

Prevention:
use POST MILKING DIP (anything that got on the cow from being milked will die). have milkers wear gloves, milk heifers before cows, milk sick animals last/separately

Question 6

if a cow is infected with these contagious pathogens causing mastitis, they are often culled

Answer 6

staph aureus and mycoplasma spp

Question 7

list some environmental pathogens that cause mastitis

Answer 7

coliform, staph uberus and dysgalactiae,

Question 8

which mastitis pathogen can be both contagious and environmental

Answer 8

coagulase positive staph like staph hyicus and staph epidermidis

Question 9

how is environmental mastitis best controlled?

Answer 9

removing manure, using clean bedding and cleaning it often, use sand bedding and not hay or wood, PRE MILKING DIP, intramammary dry cow antibiotics + teat sealant

Question 10

wood bedding/shavings predisposes to what

Answer 10

klebsiella mastitis