# Council Directive 98/57/EC of 20 July 1998 on the control of Ralstonia solanacearum (Smith) Yabuuchi et al., Division: Principle:

Extent: E+W+S+N.I.

The testing procedure is intended for detection of latent infections in potato tubers. A positive result from at least two screening tests ( 3 ), based on different biological principles, must be complemented by the isolation of the pathogen; followed by, in case of isolation of typical colonies, confirmation of a pure culture as R. solanacearum A positive result from only one of the screening tests is not sufficient to consider the sample suspect.
Screening tests and isolation tests must permit detection of 10 3 to 10 4 cells/ml of resuspended pellet, included as positive controls in each series of tests.

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Source: https://www.legislation.gov.uk/eudr/1998/57/annex/II/section/I/division/2/division/1 (the official version)
Page: https://openlegislation.uk/eu-directive-1998-57/annex-II/section-I/division-2/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.