Orthomyoviridae

Question 1

Orthomyoviridae morphology

Answer 1

pleomorphic, spherical, sometimes filamentous

Question 2

Orthomyoviridae geome

Answer 2

segmented, linear, (-), ssRNA

Question 3

Orthomyxoviridae replication

Answer 3

nucleus

Question 4

Orthomyxoviridae transmission

Answer 4

fecal-oral, feces of aquatic birds, ingestion, aerosol, fomites
Thogoto- ticks
isavirus- water

Question 5

Most important viral resp. disease of horses

Answer 5

Influenza A viruses

Question 6

EIV: pathogenesis

Answer 6

replicates in upper/lower resp. tract- ciliated epi is destroyed- 2nd infection

Question 7

EIV: CS

Answer 7

mucopurulent nasal discharge, dry paroxysmal cough, fever, abortion, depression

Question 8

EIV: diagnosis

Answer 8

PCR, nasal/pharyngeal swabs, virus isolation, hemaggulation test in chick embryos

Question 9

EIV: control

Answer 9

isolate infected, hygiene, vaccinate

Question 10

Swine influenza virus are a mixture of __ and __ strains

Answer 10

avian and human strains of virus

Question 11

SIV: pathogenesis

Answer 11

replication in upper resp. tract- airway plugging, perivascular mononuclear cell infiltration

Question 12

SIV: CS

Answer 12

nasal discharge, fever, severe pneumonia, and death

Question 13

SIV: diagnosis

Answer 13

CS, virus isolation, ELISA, HI test, PCR

Question 14

SIV: diagnosis

Answer 14

no therapies, vaccine

Question 15

SIV: CS in humans

Answer 15

resp. disease

Question 16

Avian influenza: replication

Answer 16

intestinal and resp. tracts of birds

Question 17

AI: CS

Answer 17

pancreatitis, myocarditis, my, lacrimation, diarrhea, cyanosis of comb and wattle, head edema

Question 18

AI: diagnosis

Answer 18

CS, PCR, virus isolation, Agar gel, ELISA, HI assay

Question 19

AI: control

Answer 19

depopulate, isolate poultry from wild