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Swine GI dz (Neonatal pig diarrhea (Rota/Coronavirus (TGE…
Swine GI dz
Neonatal pig diarrhea
Cystoisospora suis (Coccidia)
invades and replicates in jejunum and ileum villous epithelium
villous atrophy
malabsorption diarrhea
do a fecal float of mucosal scrapings
Rota/Coronavirus
Target villous enterocytes
TGE
undifferentiated diarrhea and vomiting
death is near 100%
PED
mild version of TGE signs
Rotavirus
mostly mild or subclinical
Histo, fecal PCR, fecal ELISA, IHC
ETEC
INTACT villi
adhere to villous brush border
secrete toxins
secretory diarrhea
Virulence factors
Fimbriae (F4 most common)
Exotoxins
Heat stable STa & b
Heat labile LT1 &2
Endotoxins
Lipid A portion of LPS
Clostridia
Perfringens type A
mild non-specific diarrhea
Difficile
fibrinonecrotic typhlocolitis
MESOCOLONIC EDEMA
Perfringens type C
necrohemorrhagic & emphysematous enteritis
whole litter dies
SI > cecum, colon
Diagnostics
Culture
Toxin ID (ELISA)
Histopath
Gross lesions
Major causes of diarrhea by age
Nursery Pigs (4-10 wks)
Salmonella
TGE
Lawsonia
E. coli
Grow-Finsher pigs (10wk-6 months)
Brachspira
Whipworms
TGE
PCV-2
Salmonella
Lawsonia
Suckling pigs (0-4 weeks)
Rotavirus
Coronavirus (TGE)
C. perfringens type A
Coccidia (Cystoisospora suis)
C. perfringens type C
Atrophic enteritis
C. difficile
Idiopathic
ETEC