Anaplasmosis, Babesiosis, Fasciolosis

Question 1

Synonymous terms for Anaplasmosis:

Answer 1

Bovine anaplasmosis
Gall sickness

Question 2

Which disease causing anaplasma species cause less severe clinical signs?

Answer 2

Anaplasma centrale

Question 3

What is the causative agent of a disease that presents with erythrocyte invasion and cyclical replication after a 7- to 60-day incubation?

Answer 3

Anaplasma spp

Question 4

How many percent of the entire pool of circulating erythrocytes must be infected for any clinical signs to occur:

Answer 4

15%

Question 5

Incubation period of Anaplasma spp

Answer 5

7-60 days

Question 6

Site of erythrocyte destruction in anaplasmosis resulting to anemia without hemoglobinuria:

Answer 6

Spleen

Question 7

Mechanism whereby the destruction of the RBCs takes place in the mononuclear phagocytic system:

Answer 7

Extravascular hemolysis

Question 8

Describe the blood of anaplasma-infected cattle:

Answer 8

Thin and watery

Question 9

Name the three causative agents for tick fever in cattle:

Answer 9

Anaplasma marginale
Babesia bovis
Babesia bigemina

Question 10

Identify the difference of A. centrale and A. marginale in giemsa-stained blood films

Answer 10

A. marginale - toward the margin
A. centrale - located more centrally

Question 11

What drug is commonly used as treatment for single IM in the anaplasmosis-infected cattle?

Answer 11

Oxytetracycline (20 mg/kg)

Question 12

What is the recommended treatment protocol for eliminating a carrier state, using oxytetracycline?

Answer 12

20 mg/kg, IM, at least two injections with a 1-week interval

Question 13

Preferred site of injection of oxytetracycline in anaplasmosis-infected cattle?

Answer 13

neck muscle

Question 14

Which drug is also highly efficacious against A.marginale as a single injection?

Answer 14

Imidocarb

Question 15

Which Babesia spp cause most clinical cases in cattle:

Answer 15

Babesia bovis
B. bigemina

Question 16

Name the major vectors for Babesia bigemina and Babesia bovis

Answer 16

Rhipicephalus microplus
R. annulatus

Question 17

The major vector for B. divergens

Answer 17

Ixodes ricinus

Question 18

It occurs when the destruction of the RBCs takes place in the blood vessels and hemoglobin is released

Answer 18

Intravascular hemolysis

Question 19

Gives rise to hemoglobinuria

Answer 19

Hemoglobin

Question 20

B. bovis is more likely to be recovered from which blood, and identify the site blood collection:

Answer 20

Capillary blood (from capillaries in ear or tail)

Question 21

Drug used for treatment of B. bigemina-infected cattle:

Answer 21

Diminazene aceturate

Question 22

Vaccines for Babesiosis is administered to which age range of cattle?

Answer 22

3-9 months-old cattle