#Prevalence and concentration of stx+ #Ecoli and E. coli O157 in #bovine #manure from #Florida #farms (PLoS One, abstract)

[Source: PLoS One, full page: (LINK). Abstract, edited.]


Prevalence and concentration of stx+ E. coli and E. coli O157 in bovine manure from Florida farms

Christopher A. Baker, Jaysankar De, Bruna Bertoldi, Laurel Dunn, Travis Chapin, Michele Jay-Russell, Michelle D. Danyluk, Keith R. Schneider

Published: May 24, 2019 / DOI: https://doi.org/10.1371/journal.pone.0217445



Fresh produce outbreaks due to Shiga toxin-producing Escherichia coli (STEC) continue to occur in the United States (US). Manure-amended soils can pose a public health risk when used for growing raw agricultural commodities. Knowing the prevalence and concentration of STEC in untreated biological soil amendments of animal origin (BSAAO) is important to help guide the most appropriate pre-harvest interval(s) following application to limit risks from these soil amendments. Bovine manure samples were collected from 12 farms in Florida, including samples from piles, lagoons, barns, and screened solids. Two methods were used to detect stx1/2 and rfbE genes in samples. A prevalence rate of 9% for stx1 and/or stx2 and 19% for rfbE was observed from the 518 bovine manure samples evaluated. A most probable number (MPN) assay was performed on stx+ samples when applicable. The geometric mean for stx+samples (n = 20) was 3.37 MPN g-1 (0.53 log MPN g-1) with a maximum value of 6,800 MPN g-1 (3.83 log MPN g-1). This research was part of a larger nationwide geographical study on the prevalence and concentration of STEC in bovine manure to help guide regulations on feasible pre-harvest intervals for the application of untreated BSAAO.


Citation: Baker CA, De J, Bertoldi B, Dunn L, Chapin T, Jay-Russell M, et al. (2019) Prevalence and concentration of stx+ E. coli and E. coli O157 in bovine manure from Florida farms. PLoS ONE 14(5): e0217445. https://doi.org/10.1371/journal.pone.0217445

Editor: P. Pardha-Saradhi, University of Delhi, INDIA

Received: March 18, 2019; Accepted: May 10, 2019; Published: May 24, 2019

Copyright: © 2019 Baker et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Data Availability: All relevant data are within the manuscript and its Supporting Information files.

Funding: This work was supported by the Western Center for Food Safety contract U19-FD004995 from the U.S. Food and Drug Administration. The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

Competing interests: The authors have declared that no competing interests exist.

Keywords: E. Coli; Cattle; Environmental pollution; USA.


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Giuseppe Michieli

I am an Italian blogger, active since 2005 with main focus on emerging infectious diseases such as avian influenza, SARS, antibiotics resistance, and many other global Health issues. Other fields of interest are: climate change, global warming, geological and biological sciences. My activity consists mainly in collection and analysis of news, public services updates, confronting sources and making decision about what are the 'signals' of an impending crisis (an outbreak, for example). When a signal is detected, I follow traces during the entire course of an event. I started in 2005 my blog ''A TIME'S MEMORY'', now with more than 40,000 posts and 3 millions of web interactions. Subsequently I added an Italian Language blog, then discontinued because of very low traffic and interest. I contributed for seven years to a public forum (FluTrackers.com) in the midst of the Ebola epidemic in West Africa in 2014, I left the site to continue alone my data tracking job.