La Ortho - MK Disease In Swine

Question 1

lameness in swine

Answer 1

Second most common cause of culling/mortality is sows
10-15% are culled ^^
Huge economic loss - 25-180loss per lame sow
Genetics, nutrition, management, housing

Question 2

Impacts of lameness on reproduction

Answer 2

Related to reproductive failure
Reduces litters per year
# of piglets weaned/sow/year (average 26)

Question 3

Flooring

Answer 3

Rounded edge, slatted floor
Clean, expenses, damage to foot

Question 4

Stocking density recommendations

Answer 4

0.5 sq meters per 10 kegs

Question 5

Genetics for herd soundness

Answer 5

Correlation between back fat thickness & leg soundness are not favorable
Loin muscle area and soundness are not favorable
Good meat = painful lame pig

Question 6

Scoring lameness/leg conformation

Answer 6

1-5 for rear and front
1-3 are unacceptable
7 or higher ++

Question 7

Diamond skin disease

Answer 7

Erysipelas
Erysipelothrix rhusiopathiae
Potentially zoonotic

Question 8

DSD epidemiology

Answer 8

Exposed in dirt lots - vaccination is common
Carrier animals
Could be secondary to stressful event

Question 9

DSD clinical signs

Answer 9

Sudden onset of acute disease
High fever, anorexia, lethargy, DSD lameness, abortions, sudden death
Chronic form = arthritis, endocarditis

Question 10

Diagnosing Erysipelas

Answer 10

Clin history and signs
Necropsy, culture

Question 11

Treating DSD

Answer 11

Antiserum
Penicillin, ampicillin, ceftiofur
Chronic form - no treatment

Question 12

Suppurative arthritis & osteomyelitis agents

Answer 12

Trueperella (Actinomyces) pyogenes
Strep & staph
Brucella suis
E/coli, environmental organisms

Question 13

Suppurative arthritis and osteomyelitis epidemiology

Answer 13

Tonsilar exposure
Fighting wounds - post weaning
Dystopias
Unsanitary practice
Foot/limb abrasions

Question 14

How bacteria reaches the joint

Answer 14

Hematogenous route
Extension from adjacent focus of infection
By direct inoculation (trauma)

Question 15

Symptoms for SA and OM

Answer 15

Periarticular abscess, intraarticular abscess, spinal abscess, osteo myelitis
- cull if chronic
Control by eliminating predisposing cause

Question 16

Arthritis & systemic disease epidemiology

Answer 16

Arthritis = systemic infection
Carrier animals
Stressful events precipitates clinical disease

Question 17

Agents for arthritis & systemic disease

Answer 17

Mycoplasma hyorhinis or hyosynoviae
Streptococcus suis
Hemophilia parasuis - glassers disease

Question 18

Mycoplasma polyerositits

Answer 18

M. Hyorhinis - young, 3-10 weeks
M. Hyosynoviae - growing pigs, 8+ wks
Normal Inhabitant of pharynx and synovial fluid
Stiff limbs, fever, dyspnea, pleural friction rub

Question 19

Treating mycoplasma polyserositis

Answer 19

Difficult to treat
Necropsy - serofibrinosus pleuritis, pericarditis, peritonitis
Synovial hypertrophy = ^^ synovial fluid

Question 20

Strep suis

Answer 20

“Suis-cides “ in pigs
Common in piglets <12 weeks
Few weeks after weaning
Piglets = carrier animals (nose, tonsils of healthy animals)

Question 21

Clinical signs of strep suis

Answer 21

Septicemia = arthritis, meningitis, pericarditis, endocarditis, polyserositis, pneumonia

Question 22

What age are piglets weaned?

Answer 22

Three weeks

Question 23

Clin signs of strep suis

Answer 23

CNS + lameness, tremors

Question 24

Treatment for strep suis

Answer 24

Ceftiofur, penicillin

Question 25

Necropsy findings for Strep suis

Answer 25

Fibriopurulent polyserositis, fibronous arthitis, suppurative meningitis
Bronchopneumonia

Question 26

Glassers disease

Answer 26

Infectious polyarthitis
Haemophilus parasuis

Question 27

Epidemiology of glassers

Answer 27

Piglets from weaning (3wks - 4 months)
Recent stress
Sporadic w sudden onset

Question 28

Clinical signs of glassers

Answer 28

Sudden fever, dyspnea, harsh lung sounds
Very lame, on toes, short & stiff
Red /blue discoloration of skin near death

Question 29

Treating glassers

Answer 29

Excede, penicillin, tilmicosin, trimethoprim-sulfadoxine