Salmonellosis and Polish Eggs Jim McLauchlin Food, Water & - - PowerPoint PPT Presentation

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Salmonellosis and Polish Eggs Jim McLauchlin Food, Water & - - PowerPoint PPT Presentation

Nov 25, 2023 477 likes •607 views

Salmonellosis and Polish Eggs Jim McLauchlin Food, Water & Environmental Microbiology Services, England Eggs and salmonellosis Salmonella Enteritidis most common serovar of Rate per 100k English Population Salmonellosis in most

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Salmonellosis and Polish Eggs

Jim McLauchlin Food, Water & Environmental Microbiology Services, England

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5 10 15 20 25 30 35 40 45 50 1991 1993 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017

  • Salmonella Enteritidis most common serovar of

Salmonellosis in most industrialised countries

Rate per 100k English Population

2007/8 - Chickens must be routinely monitored for Salmonella in Salmonella National Control Programmes (Reg. (EC) No.

2160/2003, Reg. (EC) No 517/2011 and Control of Salmonella in Poultry Orders)

2004 - Egg marketing legislation - eggs must be individually stamped with producer code. 1989 – Zoonosis order 1994 – Vaccination in breeder 1998 – Vaccination in layer 1998 – “Lion mark” assurance scheme

Eggs and salmonellosis

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Port Health Training Day, November 2019

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EU monitoring: S.Enteritidis and S.Typhimurium in laying hens, 2015

The European Union summary report on trends and sources ofzoonoses, zoonotic agents and food-borne

  • utbreaks in 2015. EFSA Journal 2016;14(12):4634,231 pp. doi:10.2 903/j.efsa.2016.4634:

https://efsa.onlinelibrary.wiley.com/doi/epdf/10.2903/j.efsa.2016.4634.

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National investigations 2015/2016

  • December 2015: cluster of 17 Salmonella Enteritidis

MLVA 2-9-7-3-2 cases first detected by Scotland

  • January 2016: confirmed same strains present in

England and Wales = 57 cases since mid 2014

  • Food chain investigations lead to identification of an

egg distributor in France but no further – then case reports stopped

  • Re-emerged in August 2016 → notified the EU

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Port Health Training Day, November 2019

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Distribution of S. Enteritidis 1.2.3.18.359.360.% and 1.2.3.18.175.175.% cases by month of sample receipt 2014 – 2017 (n = 185)

Trace back from restaurant exposure in UK identified eggs from Polish packing center as commonality. Tested 1000 eggs on import - all negative

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817 cases

14 EU member states

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  • Cases reported from 13 other EU countries & UK.
  • 533 confirmed or probable cases reported in EU/EEA

countries up to December 2016

  • NL case control study → links made to same egg

distributor as made in UK investigation

  • NL sampled >5000 eggs → matching outbreak strains

detected in eggs from Poland

EU investigations 2016

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*Reference: ECDC / EFSA

ROA, March 2017

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Public Health Action

82 flocks at 18 farms subsequently positive for Salmonella Enteritidis – WGS confirms both

  • utbreak strains present

Eggs from S. Enteritidis positive farms were withdrawn from the market and restrictive measures introduced Large numbers of birds (millions) culled Widespread attempts to improve hygiene of egg production

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  • Last date of distribution of contaminated eggs = 12

December 2016

  • Outbreak expected to be over ~ end January 2017

But…

Outbreak resolution?

Re-emergence of cases in the UK in March 2017 → Different source/ food vehicle? → Still circulating outbreak strain in table eggs &/or egg products?

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UK outbreak 2017 - 2019

  • In 2018 – 247 cases reported (total of 547 cases

identified in England and Wales since June 2014)

  • Temporal pattern - peak of 73 reports in September 2018

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Port Health Training Day, November 2019

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Primary production on farms: vaccination, biosecurity Legislation: EU microbiological criteria, EU monitoring, slaughter, EU control and withdrawal of product Retail: EU labelling, shelf-life, assurance schemes Commercial kitchens: shelf-life, assurance schemes Surveillance: outbreak investigation and control, EU wide interventions, product recalls, culling of birds, improvement of hygiene at production Control strategy effective,

  • nly small number of cases identified in 2019

Controls

Port Health Training Day, November 2019