Circoviridae

Question 1

circo meaning

Answer 1

circus - circle

Question 2

morphology

Answer 2

circular ssDNA, icosahedral, naked

Question 3

resistance

Answer 3

(naked)very strong

Question 4

replication

Answer 4

baltimore II - cellular polymerase, in dividing cells -> bone marrow, leukocytes -> immunosuppresant

Question 5

infectivity

Answer 5

intestines -> blood -> everywhere

germinative infection - mother to child during pregnancy or birth (chicken injected during hatching)

Question 6

antigenic properties

Answer 6

good antigens, though cause immunosuppression which decrease the immune response to the antibodies

Question 7

name the 2 genera of circoviridae family

Answer 7

circovirus genus

gyrovirus genus

Question 8

porcine circovirus; genus and symptoms

Answer 8

circovirus, weaning, hemorrhage, immunosuppressant

Question 9

beak and feather disease virus:genus and symptoms

Answer 9

circovirus, deformities and immunosuppression

Question 10

goose circovirus: genus and symptoms

Answer 10

circovirus, immunosupression

Question 11

gyrovirus: virus species and symptoms

Answer 11

chicken infectious anemia: anemia and immunosupression

Question 12

anellovirus family: genus; its most important virus species and symptoms

Answer 12

Alpha-torque virus

• torque teno virus(TT) species
• human, swine, horse, cat, dog etc.
• no symptoms, causes liverdamage, very widespread