Retroviridae - Sporadic Bovine Leukosis

Question 1

Is there any evidence that SLB is associated with an infectious agent?

Answer 1

No

Question 2

True/False. You can distinguish SBL from BLV on histopathology.

Answer 2

False. Cannot be distinguised from enzootic bovine leukosis by histopathology.

Question 3

Which form of BLV is associated with enlargement of all lymphnodes and bone marrow necrosis?

Answer 3

Juvenile form - calves less than 6 mos old

Question 4

Which form of SBL is associated with massive thymic enlargement, brisket edema and jugular vein engorgement?

Answer 4

Thymic form - yearlings less than 2 years old

Question 5

Which form of SBL is associated with cutaneous plaques and nodules on neck, back, croup and thighs?

Answer 5

Cutaneous form - cattle 1-3 years old