Vetdle Archive Case #12: Bovine Hypomagnesaemia

Clinical Clues

A 6-year-old beef cow is found recumbent in a pasture during early spring.
The farmer reports the cow appeared nervous and separated from the herd earlier in the day.
Muscle tremors and twitching have been observed.
On examination the cow is hyperexcitable with increased heart rate.
Blood analysis reveals markedly decreased magnesium levels.
Low magnesium disrupts neuromuscular stability leading to tetany and seizures.

Diagnosis

Bovine Hypomagnesaemia

Grass tetany occurs in grazing cattle when magnesium intake or absorption is inadequate, leading to neuromuscular hyperexcitability.

Learning review

Review the case evidence

Use the paired clues to explain how the evidence in this cattle case supports the provided diagnosis, Bovine Hypomagnesaemia, then compare your reasoning with the case explanation.

Evidence checkpoints

Clues 1-2

Clue 1: A 6-year-old beef cow is found recumbent in a pasture during early spring.
Clue 2: The farmer reports the cow appeared nervous and separated from the herd earlier in the day.

Clues 3-4

Clue 3: Muscle tremors and twitching have been observed.
Clue 4: On examination the cow is hyperexcitable with increased heart rate.

Clues 5-6

Clue 5: Blood analysis reveals markedly decreased magnesium levels.
Clue 6: Low magnesium disrupts neuromuscular stability leading to tetany and seizures.

Self-review prompts

After clues 1-2, what evidence from this cattle case shaped your initial interpretation?
When you compare clues 3-4 with clues 1-2, what changed in your reasoning about Bovine Hypomagnesaemia?
How do clues 5-6 align with the case explanation for Bovine Hypomagnesaemia?

Educational Use

Vetdle archive cases are educational veterinary games for diagnostic reasoning practice. They do not provide veterinary advice, diagnosis, treatment, or professional medical guidance.