Prevalence of Cysticercus bovis in Australian cattle.

OBJECTIVE

The first national abattoir survey of Cysticercus bovis ('beef measles') in cattle was conducted in February 2008.

METHODS

During the data collection period, 493,316 cattle were subjected to standard postmortem procedures, including incision of the masseter and heart muscles. On-site veterinarians were asked to record the location of any C. bovis cysts, as well as the National Livestock Identification System ear tag numbers of infected animals. Veterinarians were asked to submit samples for laboratory confirmation by histology and polymerase chain reaction testing.

RESULTS

Of the 23 samples submitted, none was positive for C. bovis by either diagnostic method.

CONCLUSIONS

Occasional, isolated diagnoses of beef measles are still made in most states of Australia, but since the last regional surveys were conducted 30 years ago, when the estimated prevalence was 50 to 200 per 100,000 cattle slaughtered, the parasite has become extremely rare.