NAVLE Exam Simulation — 30-Question Block (DEMO)

A well-conditioned 10-month-old beef steer on good pasture is found acutely lame then dead within a day; the affected upper hindlimb muscle is swollen and crepitant, and the cut surface is dark red-black, dry, and rancid-smelling with gas. Which is the most likely diagnosis?

A 4-year-old dairy cow has months of progressive weight loss and chronic, non-responsive watery diarrhea, yet remains bright and afebrile with a normal appetite; several older herdmates have been culled for thin-cow problems. Which is the most likely diagnosis?

A feedlot steer on a high-concentrate ration strains and dribbles urine, is colicky with tail flagging, and has a distended, painful bladder; struvite crystals are noted. Which is the most likely diagnosis?

On a hot day after a light frost, cattle grazing young sorghum regrowth suddenly stagger, become dyspneic, and die within minutes; the blood of an affected animal is bright cherry-red. Which toxicosis is this?