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Clinical Communication

Arsenic poisoning in dairy cattle from naturally occurring arsenic pyrites

Pages 170-172 | Accepted 04 Nov 1986, Published online: 22 Feb 2011
 

Abstract

An outbreak of arsenic poisoning occurred in which most of a 200 cow dairy herd were affected and six died. The source of the arsenic was naturally occurring arsenic pyrites from the Waiotapu Stream, near Rotorua. Arsenic levels in the nearby soil were as high as 6618 ppm.

There was little evidence to suggest that treatment affected the course of the disease.

Haemotology was of little use in diagnosis, post-mortem signs were not always consistent and persistence of the element in the liver appeared short.

Control of further outbreaks have been based on practical measures to minimise the intake of contaminated soil and free laying water by the stock.

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