UKHSA highlighted the risk of ingesting yew tree berries to Directors of Public Health across the NW and to the other eight English regions and Devolved Administrations; shared general resources that can be shared with residents. (AI summary)
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Council contacted UKHSA on 26 September 2023 requesting UKHSA to consider any messaging alongside Environmental Health and Public Health Colleagues in the Council. UKHSA public health specialist and environmental public health scientists and Manchester City Council Public Health and environmental health colleagues undertook a full risk assessment on 27 September 2023, and followed up with an email on the same date summarising the agreed position. The decision not to issue public health messaging was a joint decision between UKHSA and Manchester City Council and was made following wider discussions with key specialists between the two agencies. UKHSA have reviewed the advice provided to Manchester City Council at the time. For the reasons below, UKHSA maintains that the decision not to put out public health messages in respect of ingestion of plants, or yew tree specifically was appropriate. UKHSA respectfully disagrees that the decision “was not properly and fully thought through”. The decision was proportionate based on the assessment of risk and consideration of the utility and impact of any messaging. Assessment of risk of harm Death from toxic effect of ingested plants is very rare. The most recent data available from Office of National Statistics (2016) identifies six deaths from ingestion of plants in England and Wales1. Of these deaths, 4 were suicides, one ingestion was accidental and it was unclear whether the remaining case was accidental or suicide. Yew tree poisoning (Taxus baccata intoxication) is described in medical literature as a known poison that can lead to death. One publication reports 22 documented case studies between 1960 and August 20162. Of the 22 cases, 15 were suicides and one ingestion was accidental. It was unclear whether the 6 remaining cases were accidental or suicides. As per our previous advice provided to the Council, we maintain that there is a greater risk of doing harm than good by proactively sharing messaging with the general public to not ingest plants, or specifically yew tree, as there is a risk of unintended consequences from such messages, where it highlights the risk of harm which may in turn provide a source for people to self-harm as a potential route for suicide. 1 Number of deaths from toxic effect of ingested plants, by underlying cause, England and Wales, deaths registered in 2016 - Office for National Statistics (ons.gov.uk) 2 Guido Reijnen, Corine Bethlehem, Jacquo M.B.L. van Remmen, Hans J.M. Smit, Matthijs van Luin, Udo J.L. Reijnders. Post-mortem findings in 22 fatal Taxus baccata intoxications and a possible solution to its detection, Journal of Forensic and Legal Medicine. Volume 52, 2017, Pages 56-61, ISSN 1752-928X,
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Given the rarity of the issue, and that it is not possible to issue messaging which has clear actions for the public, public health communication is not deemed appropriate and has the potential to lead to unintended consequences. Action taken and proposed action In addition to revisiting the advice and risk assessment referred to above, UKHSA have highlighted the risk of ingesting yew tree berries across its partner agencies as follows:
- On 7 December 2023, UKHSA North West highlighted the report to prevent future deaths and associated risk to all 24 Directors of Public Health across the NW verbally and in a presentation. As a result, Directors of Public Health were asked to consider whether any additional action should be undertaken in parks and open spaces within their local authority areas, as was highlighted to Manchester City Council. In addition, some general resources were shared with Directors of Public Health that can be shared with their residents as required (https://www.rhs.org.uk/prevention protection/potentially-harmful-garden-plants,
- On 20 December, UKHSA North West highlighted the report to prevent future deaths and associated risk to the other eight English regions within UKHSA and with the Devolved Administrations to highlight the potential risk. Thank you for bringing this matter to my attention.