# The Specified Animal Pathogens (Scotland) Order 2009, Paragraph 32


Newcastle disease (avian paramyxovirus type 1) viruses which are–
(a) uncharacterised; or
(b) have an intracerebral pathogenicity index in one-day-old chicks of 0.4 or more, when not less than 10 million 50% egg infectious doses (EID50) are administered to each bird in the test.

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Source: https://www.legislation.gov.uk/ssi/2009/45/schedule/1/paragraph/32 (the official version)
Page: https://openlegislation.uk/specified-animal-pathogens-scotland-order-2009/schedule-1/paragraph-32
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.