Navigation Links
E. coli 0157:H7 present but not common in wildlife of nation's salad bowl
Date:5/25/2010

The disease-causing bacterium E. coli O157:H7 is present but rare in some wildlife species of California's agriculturally rich Central Coast region, an area often referred to as the nation's "salad bowl," reports a team or researchers led by a UC Davis scientist.

The researchers, who are nearing completion of a massive field study to help identify potential sources of E. coli O157:H7 near Central Coast farms, presented their findings today during the annual meeting of the American Society for Microbiology in San Diego. They reported finding occasional E. coli O157:H7 infections in fecal samples of wildlife species common to the area, including cowbirds, coyotes, crows, mice and feral pigs.

Based on their findings, the researchers recommend that farmers in this region continue to follow "good agricultural practices," a set of accepted, on-farm procedures designed to protect crops from contamination during production and harvest (http://ucgaps.ucdavis.edu/).

The study was spurred by a 2006 nationwide E. coli O157:H7 outbreak linked to fresh, bagged spinach grown in California; the outbreak resulted in 205 reported illnesses and three deaths.

"The study helps us better understand the possible risk of crop contamination from wildlife and allows us to compare that to the risk of contamination from other possible sources such as livestock and irrigation water," said lead study author Michele Jay-Russell, a veterinarian at UC Davis' Western Institute for Food Safety and Security.

"We are sharing this data with the produce industry, regulators, and conservation groups to help improve prevention strategies that protect public health and preserve native wildlife populations and their habitats," she said.

E. coli O157:H7 poses a serious human health threat, commonly causing abdominal cramps and diarrhea, sometimes bloody. Severe infections may be require hospitalization and result in kidney damage and even death. People most at risk for serious complications include young children, the elderly and those with compromised immune systems.

From 2008 through 2009, the team collected and tested 1,133 fecal samples from wild birds and mammals on 38 private properties in Monterey, San Benito and San Luis Obispo counties in California. All three counties are home to farms that grow fresh spinach, lettuce and other produce.

Laboratory tests revealed that E. coli O157:H7 was present in samples from two cowbirds, two coyotes, five crows, one deer mouse and 10 feral pigs. Samples from deer, opossums, raccoons, skunks, ground squirrels and other bird and mouse species all tested negative for the bacterium.

Robert Mandrell, principle investigator and research leader from the U.S. Department of Agriculture's Agricultural Research Service, said that the discovery of a low level of E. coli O157: H7 among Central Coast wildlife was somewhat surprising.

"The fact that we have identified two bird species with an incidence of E. coli O157:H7 of more than 3 percent, feral swine with about a 4 percent incidence and several coyotes and rodents that tested positive for O157:H7 suggests there are at least several sources of pathogen movement in this region," Mandrell said.

"We have no evidence that the concentration of the pathogen was high in the feces of the animals that tested positive, so the significance of wildlife as a source of direct contamination associated with outbreaks remains unclear," he said.

Mandrell said the researchers are comparing the genetic makeup of the E. coli O157: H7 strains found in wildlife to that of strains isolated from other sources including cattle, soil and water. They hope these comparisons will help them to better assess the movement of the bacteria in this agriculturally important region.

Following up on these findings, the study team is evaluating other potential wildlife sources of E. coli O157:H7, including amphibians and reptiles, and is conducting focused research to refine best practices that promote appropriate management to protect both food safety and the environment.


'/>"/>

Contact: Pat Bailey
pjbailey@ucdavis.edu
530-752-9843
University of California - Davis - Health System
Source:Eurekalert

Related biology news :

1. NYU Cancer Institute experts present at American Society of Clinical Oncology annual meeting
2. LungPoint system results presented at American Thoracic Society 2010 International Conference
3. Texas Childrens Hospital vaccine experts present 4 studies
4. AAPS presents therapeutic protein drug interactions workshop
5. ASNTR meeting presents Sanberg Awards to Prof. Lin & Prof. Dunnett
6. Endeavour to Present at Rodman & Renshaw Global Investment Conference
7. Latino Theater Company Presents Dementia Starting April 29
8. NIDCD-funded chemosensory researchers present findings at AChemS 2010 Meeting
9. Selected highlights of the research being presented at the Experimental Biology 2010 meeting
10. Hormone sensitivity of breast stem cells presents drug target
11. Latest research on GI health presented at DDW 2010
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/6/2017)... 6, 2017 Mintigo , the ... announced Predictive Sales Coach TM , its new ... intelligence into Salesforce. This unique AI application will ... organizations with deep knowledge of their customers and ... engagement. Predictive Sales Coach extends Mintigo,s existing customer ...
(Date:3/2/2017)... -- Australian stem cell and regenerative medicine company, ... agreement with the Monash Lung Biology Network, a consortia ... Department of Pharmacology at Monash University, Melbourne ... support the use of Cymerus™ mesenchymal stem cells (MSCs) ... is a chronic, long term lung condition recognised by ...
(Date:2/28/2017)...  EyeLock LLC, ein marktführendes Unternehmen im Bereich ... Lösung zur Iris-Erkennung auf der neuesten Mobilplattform ... dem Mobile World Congress 2017 (27. Februar ... 3, Stand 3E10, vorstellen. Der ... – eine Kombination aus Hardware, Software und ...
Breaking Biology News(10 mins):
(Date:3/24/2017)...   Sienna Biopharmaceuticals, Inc. , a privately held, ... Richard Peterson will join the company as ... who brings more than two decades of global financial ... retiring at the end of April but will continue ... Sienna from Novan, Inc., where he served as Chief ...
(Date:3/23/2017)... ... 2017 , ... AxioMed president, Jake Lubinski, describes the AxioMed ... deformed, which is identical to how the human discs work to distribute force. ... to its natural state along a hysteresis curve, exactly like a healthy human ...
(Date:3/23/2017)... DUBLIN , Mar 23, 2017 ... "Biorefinery Products: Global Markets" report to their offering. ... The ... from $466.6 Billion in 2016 at a CAGR of 8.9%, ... of energetic and non-energetic bioproducts into seven major product segments: ...
(Date:3/23/2017)... March 23, 2017  SeraCare Life Sciences, ... in vitro diagnostics manufacturers and clinical laboratories, ... first multiplexed Inherited Cancer reference material ... by next-generation sequencing (NGS). The Seraseq™ Inherited Cancer ... input from industry experts to validate the ...
Breaking Biology Technology: