Bovine Flashcards
A 2-year old heifer is presented who died the night before. She was stunted compared to her herdmates, and had a 3-week history of poor apetite, unthriftiness, diarrhea. Necropsy reveals that the abomasum is edematous and cover in small umbilicated nodules 1-2mm in diameter (cobblestone or “Moroccan leather” appearance). Several other younger cows in the Spring-calving her look unthrifty and have diarrhea, too. Which one of the following options is the most consistently effective against all stages of this parasite?
A. Amprolium
B. Ivermectin
C. Levamisole
D. Netobimin
E. Morantel
B - Ivermectin
Parasite is Ostertagia. “Moroccan leather” is pathognomonic.
Atresia coli in the calf is associated with which one of the following choices?
A. Freemartins
B. Rectal palpation in 1st 42 days of pregnancy
C. History of ketosis/hepatic lipidosis in dam
D. Oral doxycycline
E. Dry matter intake over 20% during dam’s peak lactation
B - rectal palpation in 1st 42 days of pregnancy
Vascular damage secondary to amniotic vesicle palpation in the first 6 weeks of embryonic development can lead to intestinal ischemia and atresia in calves.
Inherited atresias or the intestine are relatively common in large animals, and only 30% of them survive to adulthood
Surgical correction is NOT recommended in Holstein calves due to heritability of this trait in this breed.
Which one of the following antibiotics is the treatment of choice in the face of a vibriosis abortion storm?
A. Tetracycline
B. Aminoglycoside
C. Cephalosporin
D. Fluoroquinolone
E. Chloramphenicol
A - tetracycline
Long acting oxytetracyclines are effective against Campylobacter jejuni and C. fetus fetus (organisms that cause vibriosis).
