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Flashcards in Pig Notifiable Diseases Deck (25):
1

What are the 4 OIE listed pig notifiable diseases?

Foot and Mouth, Vasicular stomatitis, Classical swine fever, african swine fever

2

Spread of FMD vs. swine vesicular disease?

Both are spread by fecal contamination, movement of pigs, waste foods, personnel, shared equipment, pet pigs

but FMD is also airborne

3

Route of infection for SVD vs. FMD?

Swine vesicular disease = ingestion, cuts/abrasions

FMD = ingestion, inhalation, abrasions/cuts

4

pathogenesis of vesicular diseases?

Virus multiplies locally -> viremia -> cell destruction and formation of vesicles -> excretion of virus via feces (for ~3 months) and URT (for ~2 weeks)

5

CS of FMD and SVD?

Indistinguishable signs in the field.

pyrexia, anorexia, depression
Vesicles around coronary band - white lesions early (rare on snout), vesicles burst and heal by 4 days - underrun the horn and cause sloughing

Sudden onset, severe lameness - arched back unwilling to move - may walk on knees

Morbidity and mortality lower for SVD. high mortality in suckling pigs (vs adults)

6

Distribution of lesions for FMD/SVD?

Coronary band of feet and supernumerary digits, interdigital space, limbs, mammary glands, snout, and tongue

7

What are some differential diagnoses for vesicular diseases? (5)

Contact dermatitis
Swine pox
Trauma
Chemical burns
Biotin deficiency (bleeding around hoof)

8

Dx of vesicular diseases

Virus isolation - confirm first case
PCR - ancillary test

9

Spread of the swine fevers?

Contact via oral or nasal secretions (pig to pig), movement, waste food w/ uncooked pigmeat, carrier pigs, mechanical / personnel/ vet, infected ticks (ornithodorous) for ASF, wild boars

10

CS of acute swine fever

pyrexia (>40C), inappetant, dull, BLOTCHY discoloration of skin, incoordinated

weakness of hindquarters, constipation -> diarrhea, coughing, death in 4-7d, recovered sows abort, congenital tremor

11

CS of chronic swine fever

dull, unthrifty (stunted growth with PI), variable cough, diarrhea, emaciation, joint swellngs, necrotic ulceration of skin

12

What are some DDx for the swine fevers? (7)

Bacterial septicemia (blotching of skin)
PCV2 AD
Thrombocytopenia
Warfarin poisoning (hemorrhaging)
Nervous conditions
Erysipelas
Porcine stress syndrome

13

PM findings for african swine fever

Hemorrhagic LN, hemorrhagic kidneys, petechial hemorhhages, blotching of skin (starts off small and then coalesce)

14

PM findings for classical swine fever

Button ulcers! (intestnes - dont really occur anywhere else, with any other disease)

hemorrhage of abdminal viscera, bladder, intestines, skin

15

Diagnosis of swine fevers?

Virus isolation - confirm
PCR - for subsequent cases
Serology - Serum neutralization test (come back in 24 hours - not definitive, but helps suggest)

16

Under EU legislation, when suspected notifiable disease - a protection zone and surveillance zone are made around the perimeter of infected premises - how wide are these zones (radius)?

Protection zone - 3km radius from infected premises

Surveillance zone - 10km min radius

17

What is the principle means of control of exotic notifiable disease?

Slaughter of susceptible animals on infected premises and those ID as dangerous contacts

18

After a farm has been cleansed and disinfected following infection w/ notifiable disease - what can you do before putting a whole bunch of new pigs?

Put in sentinel pigs - a few.

monitor and see if they come down with disease - if they don't, you can restock the farm.

19

What is the 20 day rule?

Movement of pigs by license only!

No movement OFF for >20 days after movement ON
[most notifiable diseases will start to appear w/in 20 days]

(except if to slaughter, or excemption license from DVM)

20

CS of Aujeszky's virus?

inappetence, fever, lethargy
fertility problems
nervous signs
respiratory signs
No signs are pathognomonic

notifiable (but not worldwide), free in GB

21

Transmission of aujeszky's disease?

Oro-nasal route
Aerosol up to 5km (wind)
Semen and AI
Transplacental
Carrier pigs (7-14d excretion after clinical recovery)
Slurry/buildings
Wild boar

22

why is anthrax rare in pigs?

They have some resistance

23

What are the three forms of anthrax in pigs?

Pharyngeal, intestinal, septicemic

24

Ddx for anthrax?

any disease causing sudden death (ex- acute swine fever)

Erysipelas
Clostridia
Salmonella
Hyperthermia
Poisons

25

Dx of anthrax?

Report to AHVLA
Blood smear from superficial vessel
Smears from swab of cervical eema
Also from associated Ln
Polychrome methylene blue

= pink stained rods w/ surrounding clear capsule and spores