Mastitis

Question 1

most common cause of subclinical IMI in small ruminants

Answer 1

CNS

Question 2

most common cause of clinical IMI in small ruminants

Answer 2

staph aureus

Question 3

causes of a precocious udder

Answer 3

puberty
progesterone
estrogen
seasonality (spring)

Question 4

abx for beef cattle mastitis

Answer 4

oxytetracycline
macrolides
florfenicol

Question 5

main pathogens of mastitis in sows

Answer 5

coliforms

Question 6

abx for pigs

what other tx?

Answer 6

oxytetracyclines
macrolides
ceftiofur

oxytocin and NSAIDs

Question 7

main mastitis pathogen in horses? when does it occur? other clinical signs?

Answer 7

strep zooepidemicus
during dry off period
swollen mammary v and hindlimb lameness

Question 8

cause of agalactia in horses

Answer 8

endophyte contaminated fescue = ergot alkaloid fungus like acts like dopamine agonists

Question 9

treatment for horse agalactia

Answer 9

dopamine antagonist like domperidone

Question 10

proper milking procedure is dependent on what

Answer 10

oxytocin

Question 11

overmiling/no milk flow while machine is attached
teat ringing
discolored teat

Answer 11

hyperkeratosis

Question 12

cause of ulcerative mammalitis

Answer 12

BHV-2

Question 13

viral causes of teat lesions

Answer 13

BHV-2
bovine papillomavirus
poxvirus
vesicular stomatitis virus

Question 14

“slow milker” secondary to fibrosis and scar tissue

Answer 14

stenotic teat canal

Question 15

what do you call a membrane blocking the teat canal

Answer 15

spider teat

Question 16

most common soft tissue mass on the teats

Answer 16

polyps

Question 17

supernumerary teats congenital or acquired

Answer 17

genetic component

Question 18

bacteria associated with udder cleft dermatitis ‘udder rot’? common in?

Answer 18

F. necrophorum
T. pyogenes

heifers and high producing animals

Question 19

the #1 economic loss associated with mastitis.

Answer 19

reduced yield (65%)

Question 20

normal SCC

Answer 20

< 100,000

Question 21

infected SCC

Answer 21

100,000 - 10 million

Question 22

US bulk tank limit for SCC

Answer 22

750k

Question 23

what is the single most effective practice to reduce incidence of contagious mastitis

Answer 23

post milk teat dip

Question 24

most common contagious mastitis pathogens

Answer 24

strep agalactiae
mycoplasma bovis
staph aureus
CNS
corynebacterium bovis

Question 25

cows with mycoplasma mastitis will also have signs of what

Answer 25

respiratory
otitis media
joints

-highly contagious
- abx resistance

Question 26

what pathogen causes microabscesses with mastitis

Answer 26

staph aureus

Question 27

how to control environmental mastitis

Answer 27

teat end immune defenses
pre-milk teat dip
clean housing
hygienic milking practices

Question 28

most common environmental mastitis pathogen and primary source

Answer 28

Strep uberis

bedding

Question 29

if I have an open herd or the BT SCC climbs rapidly after a herd addition, what bacteria am I suspecting?

Answer 29

Strep agalactiae

Question 30

how would you confirm a Strep ag infection

Answer 30

CAMP test

Question 31

which mastitis causing bacteria can you use intramammary abx?

Answer 31

Strep spp EXCEPT uberis
Coagulase neg staph
trueperella pyogenes

Question 32

why do you not give IM abx to mycoplasma?

Answer 32

abx resistance, no treatment

Question 33

why do you not give IM abx to Staph aureus

Answer 33

low cure rate

Question 34

why do you not give IM abx to Strep uberis

Answer 34

refractory to treatment

Question 35

why do you not give IM abx to Coliforms

Answer 35

little benefit