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Evaluation of an enhanced cleaning and disinfection protocol in Salmonella contaminated pig holdings in the United Kingdom

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  • Francesca Martelli
  • Mark Lambert
  • Paul Butt
  • Tanya Cheney
  • Fabrizio Antonio Tatone
  • Rebecca Callaby
  • Andre Rabie
  • Rebecca J. Gosling
  • Steve Fordon
  • Graham Crocker
  • Robert H. Davies
  • Richard Piers Smith

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Original languageEnglish
Article number0178897
Number of pages20
JournalPLoS ONE
Volume12
Issue number6
DOIs
Publication statusPublished - 8 Jun 2017

Abstract

Salmonella is the second most commonly reported zoonotic gastrointestinal pathogen in the European Union, and a significant proportion of the cases are linked to the consumption of contaminated pork. Reduction of Salmonella at the farm level helps to mininimise the contamination pressure at the slaughterhouse, and therefore the number of Salmonella bacteria entering the food chain. Cleaning and disinfection (C&D) between batches of pigs is an intervention measure that has potential to reduce the transmission of Salmonella contamination within farms. In this study, two pig finisher buildings in each of 10 Salmonella positive farms were sampled pre-C&D, post-C&D, post-restocking with the following batch of pigs, and shortly before these pigs were sent to slaughter. The incoming batch of pigs was also sampled before it reached the study building (pre-restocking). At each visit, pooled and individual faecal samples were collected and Salmonella isolation was carried out according to an ISO 6579: 2002 Annex D-based method. One building on each farm (intervention) was cleaned and disinfected according to a rigorous protocol consisting of several steps and a Defra-approved disinfectant used at the General Orders concentration, whilst the other building (control) was cleaned and disinfected as per normal farm routine. At the post-C&D visit, Enterobacteriaceae and total bacterial counts were determined to evaluate residual faecal contamination and general hygiene levels. Rodent specialists visited the farms before and after C&D and rodent carcasses were collected for Salmonella testing. The intervention buildings were significantly less likely (p = 0.004) to be positive for Salmonella after C&D. The pre-restocking pigs had the highest likelihood (p

    Research areas

  • ENTERICA SEROVAR TYPHIMURIUM, RATS RATTUS-RATTUS, TO-FINISH HERDS, RISK-FACTORS, MODELING APPROACH, BROILER HOUSES, SUBSP ENTERICA, LAYER FARMS, PERSISTENCE, EFFICACY

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