Unit 2 - Bovine Adult Enteric Diseases Flashcards
What enteric diseases effect adult cattle?
Johne’s, BVD-MD, Winter dysentery, Hemorrhagic bowel syndronme, MCF, and Rinderpest
Johne’s and BVD aren’t in this set
Which enteric disease has been eradicated?
Rinderpest
What causes winter dysentery?
Coronavirus
What time of year does winter dysentery typically occur (months)?
December-February
How does winter dysentery spread?
Rapidly via the fecal-oral route and possible respiratory transmission
What population of cattle are typically more severely affected by winter dysentery?
First-calf heifers
What clinical signs are associated with winter dysentery?
Sudden onset of mild to severe diarrhea Blood in feces is common Off feed Decreased milk production Listlessness Increased water consumption
How is winter dysentery diagnosed?
with clinical signs
How is winter dysentery treated?
Usually it is not treated - fluid or blood transfusions only in severe cases
What disease/clinical syndrome does HBS cause?
acute necrohemorrhagic enteritis
What etiologic agent is commonly found in HBS lesions?
Clostridium perfringens type A
What risk factors are associated with HBS?
High milk production cows <100 days in milk Aggressive eaters Second lactation or greater cows Recent feed change Feeding TMR and selection for smaller particles or decreased long stem fiber Rumen acidosis Excessive rumen fill with spoll over Feeding corn silage ensiled <1 week Decreased intestinal motility
What clinical signs are associated with HBS?
Acute onset of profound depression Abdominal distension Tachycardia Ruminal stasis Dark, clotted blood in feces
T/F - The mortality associated with HBS is low.
No - it has a high case fatality rate
What will you see in postmortem in an HBS cow?
Large intraluminal blood clots
