Equine Herpesvirus

Question 1

Transmission

Answer 1

contact with infected horse
aerosolized respiratory secretions
virus-contaminated fomites

Question 2

Also called

Answer 2

Rhinopneumonitis

Question 3

___ - ___% of horses are exposed by age ___

Answer 3

80-90

2

Question 4

The virus is latent here in the horse

Answer 4

trigeminal ganglia

Question 5

Most common forms

Answer 5

EHV-1 and EHV-4

Question 6

Seen mostly in

Answer 6

young horses

Question 7

EHV 6-9 infect

Answer 7

wild horses and zebras

Question 8

EHV-1 infects

Answer 8

respiratory epithelial cells
endothelial cells
neuronal cells
lymphoid cells

Question 9

EHV-1 and 4 are enveloped or not enveloped?

Answer 9

enveloped

Question 10

EHV lives in the environment for

Answer 10

7 days

Question 11

A horse that infects others but shows no symptoms is a

Answer 11

silent carrier

Question 12

Risk factors for EHV outbreaks/reactivation

Answer 12

Overcrowding 
Heavy parasite burden
Malnutrition
Climactic extremes
Disease
Rearranging/moving horses
Weaning
Transport
Surgery
Corticosteroid administration

Question 13

How does EHV-1 cause abortion?

Answer 13

endothelial cell destruction

Question 14

EHV-1 and 4 replicate in

Answer 14

the upper respiratory tract

Question 15

EHV-1 attacks

Answer 15

lymphocytes and monocytes

Question 16

EHV-1 reaches trigeminal neurons how long after infection

Answer 16

48 hours

Question 17

EHV-1 causes _________ & __________ to the uterus and CNS

Answer 17

vasculitis

ischemia

Question 18

Respiratory disease from EHV predisposes horses to

Answer 18

bacterial infections that can lead to bacterial pneumonia

Question 19

Incubation period

Answer 19

10 days

Question 20

Symptoms

Answer 20

anorexia
lethargy
fever
nasal discharge
ocular discharge
depression

Question 21

associated biphasic fever

Answer 21

days 1-2 and 6-7

Question 22

Diagnosis

Answer 22

virus isolation
CSF
serology

Question 23

Treatments

Answer 23

NSAIDS for fever

maybe antibiotics and/or fluids

Question 24

Vaccination schedule for pregnant mares

Answer 24

3, 5, 7, 9

Question 25

Vaccination for traveling show horses

Answer 25

every 4-6 months

Question 26

Do vaccines prevent respiratory illness?

Answer 26

Generally, no

Question 27

What do vaccines diminish?

Answer 27

shedding