Poultry health, Commercial poultry testing.
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Early in 1955, an amendment to the Stock Diseases Act made blood-testing compulsory for all commercial breeding and hatchery flocks of poultry, and it was required that the incidence of infection, as determined by the last test prior to the commencement of hatching, must be less than two per cent.
"Pullorum-tested poultry flocks,"
Journal of the Department of Agriculture, Western Australia, Series 3: Vol. 7
, Article 10.
Available at: https://researchlibrary.agric.wa.gov.au/journal_agriculture3/vol7/iss4/10