Water intoxication in adult cattle

Area of Science:

• Veterinary Medicine
• Animal Physiology
• Toxicology

Background:

• Water intoxication is a known condition in young calves, typically presenting with hemoglobinuria.
• Naturally occurring cases in adult cattle are exceptionally rare, with limited documentation.
• Understanding water intoxication in adult cattle is crucial for herd health management.

Observation:

• Four adult female Japanese Black cattle (16-25 months) exhibited neurological signs after drinking water post-outage.
• Gross hemoglobinuria was absent, but laboratory tests confirmed severe hyponatremia.
• Autopsies revealed cerebral edema and fluid accumulation in Virchow-Robin spaces.

Findings:

• The observed neurological signs and pathological findings are consistent with severe dilutional hyponatremia.
• The absence of gross hemoglobinuria differentiates this adult cattle presentation from typical calf cases.
• Cerebral edema appears to be a key pathological consequence of rapid water intoxication in these animals.

Implications:

• This case series suggests water intoxication is a potential, albeit rare, cause of neurological disease in adult cattle.
• Dilutional hyponatremia and subsequent cerebral edema should be considered in the differential diagnosis of neurological disorders in adult cattle.
• Preventive measures against water deprivation and ensuring consistent water access are vital for adult cattle health.