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Flashcards in exam 2 Deck (121)
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1

Excessive use of water to clean the udder is a risk factor for which type of mastitis?

coliform

2

What would be the most likely cause of chronic protein losing enteropathy in these two cows?

paratuberculosis/ johnes dz

3

In the milking process how soon should the inflations be attached to the teats after the udder is first
touched?

50-80 sec

4

Which one of the following enteric diseases of calves is commonly seen at 1-2 weeks of age?

salmonellosis

5

Hemoglobinuria is a commonly observed clinical sign with:

Phosphorus def

6

14. Which one of the following statements is true concerning Johne’s disease eradication from a cattle
herd?
a. Current diagnostic methods allow identification of infected animals early in life

b. A test and removal program for infected cows is the most profitable method

c. Fecal-oral transmission is less important than transmission through milk

d. Isolating calves from cows at birth is an effective control method

e. Culling clinical cases reduces herd prevalence of infection

d. Isolating calves from cows at birth is an effective control method

7

Which one of the following substances will reduce or kill salmonella organisms when fed to cattle?

sodium chlorate

8

Which one of the following diseases is associated with gastrointestinal hemorrhage and blood clots in

cattle?

clostridium perfringes type a and arsenic toxicosis

9

What enzyme do salmonella and E. coli 0157:H7 have that beneficial intestinal bacteria lack?

bacterial nitrate reductase

10

In cattle with LDA, which part of the abomasums rises most dorsally on the left side of the rumen

greater curvature

11

When feeding cattle and sheep in feedyards the total amount and digestibility of which one of the

following elements is of prime importance because of the environmental impact?

phosphorous

12

Impacts occur during machine milkings of cows when:

air is emitted to an inflation while the milking vacuum is operating/ Pressure on the outside of the streak canal exceeds that on the inside at the end of milking

13

A four year old Guernsey cow dies while being treated for botulism. Which of the following is most

likely on port-mortem exam?

no distinguishable lesions

14

Which one of the following is true concerning contagious mastitis bacteria?

They are obligate parasites of mammary tissue or teat skin

15

The apparatus responsible for opening and closing of the rubber teat cup lining of the milking machine
is the:

pulsator

16

Which one of the following dairy cows would be most at risk for developing subacute rumen acidosis?
Dry cow on high fiber ration.

b. Mid-lactation dairy cow.

c. Late lactation dairy cow.

d. Recently calved dairy cow on high energy ration.

e. Pre-partum dairy cow on “steaming-up” ration

recently calved dairy cow on high energy ration

17

What is the most likely diagnosis of a recently calved dairy cow with blindness and star-gazing?

Polioencephalomalacia

18

Sudden death with high morbidity in a group of vaccinated beef calves on pasture after a new dirt pond

was dug would be suggestive of:

anthrax

19

Which one of the following problems would most likely be accompanied by a leukopenia?

a. Fatty liver disease

b. Traumatic reticuloperitonitis

c. Left abomasal displacement

d. Abdominal fat necrosis

e. BRSV

fatty liver dz

20

On a dairy farm, which group of animals is predisposed most to clinically significant nematode

infection?

a. Calves in hutches

b. Lactating dairy cows in free stalls

c. Yearling heifers on pasture

d. Mature dry cows on pasture

e. Heifer calves two weeks after being removed from hutches and placed in group pens

yearling heifers on pasture

21

Which one of the following factors will put a dairy cow at risk for getting LDA?

a. Feeding anionic salts during the dry period

b. Having an abortion

c. Calving with twins

d. Diet of grass hay during the dry period

e. No access to salt during the dry period

calving with twins

as well as..
Increased concentrate to forage ratio in the postpartum diet
postpartum ketosis and metritis

22

Which one of the following statements is true regarding the “sco(o)tch test”?

withers depression

Many gastrointestinal diseases cause abdominal pain in the cow. Cows with GI pain often stand hunched up with their elbows abducted. The withers can be pinched (sometimes it requires two hands). A normal cow will flex her back ventrally when her withers are pinched as seen above. A cow who is painful will not flex ventrally. False negatives are common. Common reasons for abdominal pain are hardware, abomasal ulcers, or distention of the small intestine with gas.

23

When are most cases of acute rumen acidosis diagnosed in dairy cows?

within 2 months post calving

24

Which one of the following bovine diseases would be most characterized by this group of clinical

signs—sudden death, ataxia, flaccid paresis, inability to control tongue movements?

botulism

25

You are called to a group of well-grown 4 month old calves which show the following signs: Reluctant to
get up, appear stiff when walking, rapid heart rate. One of them is dyspneic but you do not hear
abnormal lung sounds. There are no observable neurological deficits, the calves are not febrile and the
farmer reports that they eat normally.

enzootic nutritional myopathy

26

More cheese can be made from milk with a lower somatic cell count. What is the upper limit for somatic
cell count of milk in the US?

750K

27

Too high a vacuum level during the milking process of dairy cows may predispose to mastitis by causing:

eversion of the teat sphincter

28

Why is sand considered an ideal bedding material for lactating dairy

cattle?

inability to support bacterial growth

29

Purulent, cheesy secretion would be characteristic for which type of mastitis?

staphylcoccal

30

Which one of the following clinical signs do arsenic toxicosis and blue-green algae toxicosis of cattle have in common?

hemorrhagic diarrhea