# Commission Directive 2006/56/EC of 12 June 2006 amending the Annexes to Council Directive 93/85/EEC on the control of potato ring rot, Division 4.4.5

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

Interpretation of the IF reading:
(i) If bright fluorescing cells with characteristic morphology are found, estimate the average number of typical cells per microscope field and calculate the number of typical cells per ml of resuspended pellet (Appendix 4).
The IF reading is positive for samples with at least 5 × 103 typical cells per ml of resuspended pellet. The sample is considered potentially contaminated. and further testing is required.
(ii) The IF reading is negative for samples with less than 5 × 103 cells per ml resuspended pellet and the sample is considered negative. Further testing is not required.

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Source: https://www.legislation.gov.uk/eudr/2006/56/annex/I/division/4/division/4.4/division/4.4.5 (the official version)
Page: https://openlegislation.uk/eu-directive-2006-56/annex-I/division-4/division-4.4/division-4.4.5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.