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RUSVM LAM II Practice Questions > Bovine Infectious Diseases > Flashcards

Bovine Infectious Diseases Flashcards

1
Q

Anaplasmosis affects _______ animals more severely

A

older

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2
Q

Calves with Anaplasmosis have less severe disease

but become _________

resulting in endemic stability

A

chronic carriers

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3
Q

What is the etiology of Anaplasmosis?

A
  • Anaplasma marginale*
  • Anaplasma caudatum*

(Rickettsial organisms)

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4
Q

Small, round, basophilic staining bodies

marginally located in the stroma of RBCs

are characteristic of this infectious disease

A

Anaplasmosis

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5
Q

Where does Anaplasma replicate in ticks?

A

In tick SALIVARY GLANDS

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6
Q

Calves < ______ months of age

are mildly affected by Anaplasmosis

and become chronic carriers

A

<6 months

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7
Q

What are the stages of pathogenesis of Anaplasmosis?

A

Incubation

Developmental

Covalescence

Carrier Stage

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8
Q

Incubation stage of Anaplasmosis

usually lasts ______ weeks

A

3 - 8 weeks

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9
Q

This stage in the pathogenesis of Anaplasmosis

lasts 4 - 9 days during which most signs are present:

fever (105-106F), icterus, dehydration, weakness

A

Developmental stage

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10
Q

The convalescence stage of Anaplasmosis

lasts ________ days

A

30 - 60 days

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11
Q

What is the earliest clinical sign of Anaplasmosis?

A

Decreased milk production

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12
Q

T/F:

Hemoglobinuria is a common finding in animals with Anaplasmosis

A

FALSE!

You do NOT see hemoglobinuria in Anaplasmosis

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13
Q

Anaplasmosis is an ________ disease,

meaning if you see one animal with it, the rest are usually subclinical

A

Iceberg

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14
Q

What Abx is used to treat Anaplasmosis?

A

Oxytetracycline

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15
Q

Oxytetracycline only works BEFORE the ______ stage

in the treatment of Anaplasmosis

A

replicative

USE DURING INCUBATION STAGE

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16
Q

After treating with Oxytetracycline for Anaplasmosis,

how many days is milk withdrawal?

A

2 - 3 days

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17
Q

Texas Tick Fever, discovered on King Ranch,

is better known as

A

Babesiosis

18
Q

What is the etiology of Babesiosis?

A
  • B. bigemina*
  • B. argentina*
  • B. bovis*
19
Q

The incubation period of Babesiosis lasts _______ weeks

A

1 - 3 weeks

20
Q

T/F:

An animal that survives Babesiosis becomes a carrier and is

resistant to infection

A

TRUE

21
Q

Anaplasmosis vs. Babesiosis:

Icterus is more common in which?

A

Anaplasmosis

22
Q

Anaplasmosis vs. Babesiosis:

Dark red to brown urine (hemoglobinuria) is present only in which?

A

Babesiosis

23
Q

How do you treat Babesiosis?

A

IMIDOCARB

24
Q

What is the most common sign of anthrax in cattle?

A

Sudden death

25
Q

How is anthrax diagnosed?

A

Can see the organism on blood smear

26
Q

How is anthrax controlled and prevented?

A

Vaccination in endemic areas

27
Q

What are some rare clinical signs seen in cattle infected with

Lyme disease?

A

Mastitis and arthritis

28
Q

Bovine Leukemia Virus (BLV) is very common in NA

and is seen mostly in this type of cattle

A

DAIRY

29
Q

Bovine leukemia virus is an oncogenic ________ virus

A

RNA retrovirus

30
Q

What do you expect to see on the CBC of an animal

infected with Bovine Leukemia Virus?

A

HIGH WHITE blood cell counts

31
Q

Bovine Leukemia Virus can cause Lymphosarcoma in

______% of animals

A

5%

32
Q

In cattle with BLV Lymphosarcoma, what 3 organs are

most commonly affected?

A

Heart

Abomasum

Uterus

33
Q

You suspect an animal has BLV Lymphosarcoma

due to its enlarged lymph nodes, heart and abomasum.

You notice this animal is also suffering from diarrhea and

bottle jaw. You realize now your initial suspicion is incorrect

and are now leaning towards this dz as your primary ddx.

A

Johne’s Disease

34
Q

______% of animals infected with BLV show

persistent lymphocytosis, but no other clinical signs

A

25 - 30%

35
Q

What is the natural reservoir for BLV?

A

Cattle

36
Q

_______ transmission is the most common method of

pathogenesis of BLV

A

Horizontal

(only takes a small amount of infected blood to cause infection:

via vector, rectal palp sleeves, instruments)

37
Q

T/F:

BLV can be transmitted to calves via colostrum

A

TRUE

38
Q

BLV infection results in _______% becoming

asymptomatic carriers

A

60%

39
Q

T/F:

Most cases of BLV show an elevated lymphocyte count

A

FALSE!

Most cases are inapparent with no signs

40
Q

Usually animals > _____ years old contract BLV

A

over 3 years old

41
Q

What is the best, most sensitive and specific test, used

to diagnose Bovine Leukemia Virus (BLV)?

A

ELISA

RUSVM LAM II Practice Questions (19 decks)

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