Pigs Flashcards
Enzootic Pneumonia
- mycoplasma pneumoniae
- common low level illness; dry cough, CrV lung consolidation, retarded growth
- vaccinate sow before farrowing (bacterin vaccine in sows dec colonization in suckling piglets)
- manage by dec stressors, improve ventilation, dec overcrowding
- abx (lincmycin, tetracycline) can help newly infected herds, or control signs in endemic herds by preventing 2 bacterial infection(pasteurella).
- sequela to PRRS
Edema Disease
- E.coli (Shiga toxin producing e.coli STEC)
- look for SEVERE acute illness ranging from peracute DEATH with no signs to CNS involvement with ataxia, paralysis, recumbency in healthiest pigs 1-2 weeks AFTER WEANING
HEV (Hemagglutinating encephalomyelitis virus)
piglets LESS than 4 weeks old
two presentations: 1. vomiting and wasting disease (VWD) 2. encephalitic
C. perfringens (type C)
aka ENTEROTOXEMIA in other animals
HEMORRHAGIC diarrhea in ONE - THREE day old piglets
VAX dam in last THIRD, also needs colostrum (or in acute outbreak give antitoxin WITHIN 2 HRS of birth)
proliferative enteritis
aka actue ileitis
GROWING and FINISHING pigs (40-80lb) and young breeding pigs
LAWSONIA intracellularis; hemolytic and nonhemolytic; yellow fibrinous necrotic casts
necropsy - thick mucosa
tx: abx inj or in feed. VACCINATE
TGE
in non-immune herds characterized by HIGH MORBIDITY and HIGH MORTALITY in pigs (wont die if >1m old)
V/D
<1 WEEK old
CORONAVIRUS
pig dental formula
3/3 1/1 4/4 3/3
Which pig diarrheal diseases affect the healthiest, fastest-growing piglets?
edema disease and Clostridium perfringens.
Classical Swine Fever
aka HOG CHOLERA
reportable
* contaminated garbage!
acute FEVER, incoordination, diarrhea, red skin, internal hemorrhages, cyanosis TURKEY EGG KIDNEY
ACUTE - 100% mortality/mort; death in 1-3weeks
CHRONIC - few animals; wax and wane for months, FATAL
- necropsy (hemorrhages in LNs, spleen, bladder, larynx)
tx: slaughter infected herds
US free since 1976. endemic is latin america, some european, caribbean, asia
PRRS
ARTERI VIRUS(highly contagious)
“BLUE ear disease”
management includes early weaning, isolate piglets, PRRS vax (not great), serologic monitoring and testing
Phases:
1. Repro failure
2. Post weaning respiratory ds.
3. enzootic pneumonia in growers/finishers
- in herds with less than 10% PRRSV infection, remove persistent carriers.
NO TX, PREVENTION is key (resp ds responds to abx)
MOST ECONOMICALLY SIGNIFICANT
Timeline for piglet diarrhea
1-2d - c. dif 1-7d - c. perf <1wk - TE 1-14d - e. coli (edema ds) 5-15d - coccidia (isospora, eimeria) 1-5 wks - rotavirus
Swine Dysentery
older pigs >25kg
BRACHYSPIRA hyod
mucoid LA diarrhea with flecks of blood
tx: abx in water (tylosin, lincomycin, ronidazole)
related to Spirochetosis (postweaning diarrhea, happens in abscence of brachyspira) Treated the same
Trichuris suis
older pigs, 3+ months worm in CECUM/LI HEMORRHAGIC diarrhea DOUBLE OPERCULATED EGG tx: levamisole, dichlorvos, benzimadozoles
ascaris suis
older pigs 2/3+ months
OBSTRUCTION (-> bile duct -> white SPOTS in LIVER)
pulmonary breathing = THUMPS (Verminous pneumonia)
tx: fenben, pyrantel, iver, leva, dichlor, piper, hygromycin
Salmonella
any age, usually older (3+ months)
CS if younger - septicemia
if older - fever, yellow liquid diarrhea
RECTAL STRICTURES
dx - fecal or mesen LN culture
tx: abx in water (neomycin, nitrofurazone); carbadox in feed
