Swine Medicine Flashcards
What is the structure of commercial breeding farms?
Pyramidal structure (nucleus herds - breeding herds - finishing herds)
Specific pathogen free herd
piglets are born through c-section and raised in a sterile environment
What is the daily growth of piglets?
950-1200g/day
What part of the diet causes diarrhea and gastric ulceration in pigs?
high protein diets
fine grinding of pig feed
What is produced in colostrum of sows to enhance uptake of intact immunoglobulins?
anti-trypsin factor
What causes low gastric motility in piglets?
Chilling
What causes enteral infections in piglets?
neutral pH of the stomach
Batch farrowing
All sows farrow on the same day at the same time to enable cross fostering if needed
What age of piglets are susceptible to Clostridium difficile associated enterotoxemia?
2-10 days
What are the clinical signs of Clostridium difficile associated enterotoxemia?
Mesocolonic edema and colon filled with creamy diarrhea
What are the lesions associated with Clostridium difficile associated enterotoxemia?
multifocal suppurative and erosive colitis
How do you diagnose Clostridium difficile associated enterotoxemia?
ELISA of fresh feces
What is the treatment for Clostridium difficile associated enterotoxemia?
Virginiamycin in sows before and after farrowing
Tylosin in piglets
What age of piglets is affected by Clostridium perfringens type A associated enterotoxemia?
2-10 days
What are the lesions associated with Clostridium perfringens type A associated enterotoxemia
mild multifocal suppurative enteritis with large gram-positive rods
What are the clinical signs of Clostridium perfringens type A associated enterotoxemia?
Diarrhea
How do you diagnose Clostridium perfringens type A associated enterotoxemia?
Isolation and genotyping of an enterotoxigenic Clostridium perfringens type A associated enterotoxemia
What is the treatment for Clostridium perfringens type A associated enterotoxemia?
Bacitracin in sows and piglets. Salinomycin
vaccination
What age of piglets is affected by E. coli?
one day old to 2-4 weeks post weaning
What are the virulence factors affected by E. coli?
fimbria
enterotoxins
endotoxins
capsules
What is the transmission of E. coli?
Dam
What are the risk factors for E. coli?
Continuous farrowing accompanied by poor sanitation and chilling
What are the clinical signs of E. coli in piglets?
Body temp is subnormal Shivering watery diarrhea vomiting polyserositis
How do you diagnose E. coli in piglets?
Culture uniform E. coli from SI
Identify enterotoxigenic E. coli with PCR
What is the treatment for E. coli in piglets?
Antimicrobials oral and parenteral - Ampicillin, gentamycin, neomycin, furizolidone, potentiated sulphur drugs
How do you control E. coli in piglets?
Good sanitation
All in all out
Sow vaccination
twice before farrowing
What age of piglets is affected by Edema disease (colibacillosis)?
recently weaned pigs
What are the clinical signs of Edema disease (colibacillosis)?
Edema at certain sites sudden deaths Neurologic signs related to lesions of the brain Anorexia Ataxia stupor recumbency paddling running movements Abnormal squeal when handled
What causes coccidiosis in piglets?
Isospora suis
What is the age of piglets affected by Isospora suis (coccidiosis)?
1-3 week old nursing piglets
What is the source if infection for Isospora suis (coccidiosis)?
Sows - feces contaminated feed and water
What are the clinical signs of Isospora suis (coccidiosis)?
Yellow to clear pasty to watery diarrhea
dehydration
rough hair coat
failure to gain weight
What is the control measures for Isospora suis (coccidiosis)?
Good sanitation
disinfection of farrowing pens
steam cleaning
What is the treatment for Isospora suis (coccidiosis)?
Toltrazuril
What age of piglets is affected by Rotaviral enteritis?
1-6 week old pigs
one week after weaning pigs
What are the clinical signs of Rotaviral enteritis?
Diarrhea
vomiting
nonfatal
What are the lesions associated with Rotaviral enteritis?
moderate villous atrophy
How do you diagnose Rotaviral enteritis?
EM or ELISA of feces
FAT or IHC of SI epithelium
What age of piglets is affected by Transmissible gastroenteritis (TGE)?
All affected is previously unexposed
Most severe in pigs less than 4 weeks old
What are the clinical signs of the acute form of Transmissible gastroenteritis (TGE)?
Vomiting and high mortality
Bright yellow feces in older pigs
Marked diarrhea in feeder age pigs
Vomiting, depression, and refusal to nurse in acutely infected sows
How do you diagnose Transmissible gastroenteritis (TGE)?
FAT or IHC of acutely affected pigs
PCR on feces
What is the most important Streptococcal infection of pigs in nursing and weaned pigs?
Streptococcus suis
What age of pigs is affected by Streptococcus suis?
Nursing or weaned piglets
Clinical signs of Streptococcus suis
septicemia acute meningitis Polyarthritis Polyserositis bronchopneumonia CNS signs in young pigs (Older pigs) - ataxia, opisthotonos, incoordination, tremors, convulsions, blindness, and deafness
What is the transmission of Streptococcus suis
Dust or feces
Isolated from the nasal cavity and palatine tonsils of normal pigs
Present in the feces and nasal secretions of carriers
Ingestion
Inhalation
Contact
Wounds
How do you control Streptococcus suis
Elimination of stresses Overcrowding poor ventilation High humidity Poor sanitation Vaccination of sows prior to farrowing
What is the treatment for Streptococcus suis
Injectable Abx (ampicillin, penicillin, tiamulin, ceftiofur) Infeed and water Abx
When do you see Hypogalactia or Mastitis, Metritis, Agalactia (MMA)?
3 days after farrowing
Clinical signs of Hypogalactia or Mastitis, Metritis, Agalactia (MMA)?
Mastitis fever vaginal discharge listlessness weakness anorexia sternal recumbency refusal to nurse piglets
What are the risk factors for Hypogalactia or Mastitis, Metritis, Agalactia (MMA)?
lack of nursing stimulation bacterial metritis mastitis mammary edema little exercise poor feeding constipation obesity moldy feeds poor sanitation
Control of Hypogalactia or Mastitis, Metritis, Agalactia (MMA)?
Exercise
nutrition
BCS
What causes teat necrosis and vulvar swelling in young piglets?
Zearalenone
In what age of piglets do you see Pityriasis rosea?
12 week old pigs
Lesions of Pityriasis rosea?
1-20 cm raised reddened ring shaped lesions on the skin usually ventral abdomen
What is the treatment for Pityriasis rosea?
Resolves spontaneously
Splay leg
Abnormality of neonatal piglets characterized by lateral extension of the hind legs with inability to adduct the legs
Front legs may be variably affected
Principle lesion of Splay leg?
myofibrillar hypoplasia
Risk factors for splay leg
genetic predisposition slippery or sloped floors PSS (Porcine Stress syndrome) Dietary deficiencies low birth weights Tremorsin piglets
Treatment for Splay leg
Tying front or back legs loosely together for 2 weeks
How do you control Splay lag?
Selection of breeding stock with no tendency
Epitheliogenesis imperfecta
Inherited condition that occurs in 4 breeds
Characterized by discrete areas of skin over parts of the back, loins, and thighs
Lesions of Epitheliogenesis imperfecta
discrete areas of skin over parts of the back, loins, thighs, and anterior surface of the tongue
Hydroureter
Hydronephrosis
Aborted fetuses
What age of pigs are effected by Erysipelothrix rhusiopathiae?
growing or adult swine
Lesions of Erysipelothrix rhusiopathiae?
Enlarged joints
lameness
endocarditis
Rhomboid skin lesions
Transmission of Erysipelothrix rhusiopathiae?
Carriers - feces and oronasal secretions
Clinical signs of Erysipelothrix rhusiopathiae?
Fever
cyanotic skin around ears, snout, throat, and ventral abdomen
discrete raised and red to purplae areas of skin shapes
Swollen painful joints
abortion
valvular lesions causing exercise intolerance
Control of Erysipelothrix rhusiopathiae?
Regular vaccination
good sanitation
elimination of carrier with skin and joint lesions
quarantine of appropriate stock
Treatment of Erysipelothrix rhusiopathiae?
Penicillin
Antiserum