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Flashcards in Respiratory diseases of pigs Deck (85)
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1

What is an upper respiratory disease of pigs caused by toxigenic pasturella multocida?

progressive atrophic rhintis

2

What is an upper respiratory disease of pigs caused by toxigenic pasturella multocida?

progressive atrophic rhintis

3

What causes non-progressive rhinitis in pigs?

1. bordetella bronchiseptica
2. procine cytomegalovirus (inclusion body rhinitis)

4

What causes progressive rhintis?

1. toxogenic pasturella multcida +/- 2. other agents which enhance colonization (bordetella, cytomegalovirus),
3. environmental (high ammonia, dust)

5

What is the epidemiology of progressive rhinitis?

1. agents causing rhinitis wide-spread
2. toxigenic PM limited to herds with progressive atrophic rhinitis
3. horizontal transmission (sow piglet, piglet-piglet)

6

What age of pig gets INFECTED with progressive atophic rhinitis?

7

What is the pathogenesis of progressive atrophic rhintis?

1. pre-existing damage to mucosa assists colonization of TPM (infections, environmental)
2. infection with TPM
3. dermonecrotic toxin production
4. permanent turbinate destruction

8

What does toxogenic pasturella multocida produce and what does it do?

Dermonecrotic toxin
causes
1. decreased osteogenesis
2. increased osteolysis
==>turbinate damage

9

What are the clinical signs of progressive atrophic rhinitis in an ENDEMICALLY INFECTED FARM

sneezing (SUCKING AND NURSERY PIGS)
little or no epistaxis
little or no snout deviations
SUBCLINICAL TURBINATE ATROPHY

10

What are the clinical signs of progressive atrophic rhinitis in an ENDEMICALLY INFECTED FARM

sneezing
little or no epistaxis
little or no snout deviations
SUBCLINICAL TURBINATE ATROPHY

11

What causes non-progressive rhinitis in pigs?

1. bordetella bronchiseptica
2. procine cytomegalovirus (inclusion body rhinitis)

12

What causes progressive rhintis?

1. toxogenic pasturella multcida +/- 2. other agents which enhance colonization (bordetella, cytomegalovirus),
3. environmental (high ammonia, dust)

13

What is the epidemiology of progressive rhinitis?

1. agents causing rhinitis wide-spread
2. toxigenic PM limited to herds with progressive atrophic rhinitis
3. horizontal transmission (sow piglet, piglet-piglet)

14

What space is used to check for turbinate atrophy in progressive atrophic rhinitis?

the space between the nasal septum and the vental scroll (plus check septal deviation, dorsal space)

15

What is the pathogenesis of progressive atrophic rhintis?

1. pre-existing damage to mucosa assists colonization of TPM (infections, environmental)
2. infection with TPM
3. dermonecrotic toxin production
4. permanent turbinate destruction

16

What does toxogenic pasturella multocida produce and what does it do?

Dermonecrotic toxin
causes
1. decreased osteogenesis
2. increased osteolysis
==>turbinate damage

17

What are the clinical signs of rhintis?

sneezing
nasal discharge (no blood)

18

What are the clinical signs of progressive atrophic rhinitis in an ENDEMICALLY INFECTED FARM

sneezing
little or no epistaxis
little or no snout deviations
SUBCLINICAL TURBINATE ATROPHY

19

What are the clinical signs of progressive atrophic rhinitis in a NAIVE FARM (epizootic)

1. severe sneezing (ANY AGE)
2. NASAL HEMORRHAGE (any age)
3. lacrimation
4. facial deformities (chronic)
5. growth retardation (grow finish)

20

How does toxigenic pasturella multocida cause growth retardation

1. metabolic impact of toxin
2. reduced feed intake due to facial deformities

21

How is progressive atrophic rhinitis diagnosed?

1. facial deformities, epistaxis (herd basis)
2. sneezing (NOT pathopneumonic)
3. tubinate atrophy @slaughter
4. deep nasal swab--culture, ID toxin--ELISA, PCR

22

Where is the snout sectioned to look at progressive atrophic rhinitis?

at the level of the first/second premolar

23

What is the epidemiology of mycoplasma hyopneumoniae?

1. two to three weeks
2. horizontal transmission (sow-piglet, pig-pig)
3. expression in GROWER PIGS >10WEEKS
4. REGIONAL spread via aerosol-water droplets (although poor environmetnal survival)

24

What are two snout score thresholds that indicate PAR requiring intervention

multiple individual scores >3.5
average score >1

25

What are the principles of progressive atrophic rhinitis control

1. decrease concurrent colonization (improve air quallity, separate age groups, feed medication)
2. antimicrobials targeted at TPM (prior and after weaning)--oxytet parenteral and feed Ab
3. vaccination of sow herd--pre-farrowing (passive immunity)

26

What must a vaccine for progressive atrophic rhinitis contain?

TPM, Bb, toxoids

27

Why should you do a pre-farrowing vaccination of breeding herd for PAR

to enhance passive and mucosal immunity

28

What causes enzootic penumonia?

mycoplasma hyopneumoniae

29

What is a contributor to procine respiratory disease complex

mycoplasma hyopneumoniae

30

What is severity of enzootic penumoniae influenced by?

1. MH strain
2. pig flow
3. animals per air space
4. pen density
5. air quality