eNewsletter, June-July 2018
May 2017 | WCFS & WIFSS Newsletter
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Please have a look at where we've been and upcoming events in food safety and security. We hope you find it informative. Stop by our websites at either or Thank you for your continued support!

University of California, Davis

IFT Annual Meeting | July 15-18, 2018, Chicago, IL
Linda Harris was among the new Institute of Food Technologists (IFT) Fellows honored at IFT 18: A Matter of Science and Food, which attracted 23,000 attendees to McCormick Place earlier this month.  Selection as a Fellow recognizes significant accomplishments in scholarly activities and service to the food science and technology profession.   Harris was recognized for her research and outreach programs that have led to notable changes to microbiological methods and method development, food industry practices, government policies, and the overall field of food safety. Save the date - IFT19 will be held in New Orleans, LA on June 2-5, 2019.

AVMA Annual Convention | July 15, 2018, Denver, CO
The American Veterinary Medical Association (AVMA) held its annual convention in Denver this year. As a member of the American College of Veterinary Preventive Medicine (ACVPM) Continuing Education Committee, Michele Jay-Russell organized and moderated Sunday’s James H. Steele One Health session and panel entitled Communication During Outbreaks – Lessons from The Trenches. Veterinary epidemiologists from the Centers for Disease Control and Prevention (CDC) and the California Department of Public Health shared their experiences investigating outbreaks linked to pet store puppies (campylobacteriosis), raw milk (listeriosis), and Zika virus. For more information see the Program Book. Next year’s convention will be held in Washington, D.C. on August 2-6, 2019.

IAFP Annual Meeting | July 8-11, 2018, Salt Lake City, UT
Among the more than 3600 food safety professionals attending the International Association of Food Protection (IAFP) Annual Meeting were WCFS' Peiman Aminabadi, Javad Barouei, Jennifer Chase, Jack Chen (now with the Suslow Lab), Betty Feng, Linda Harris, Michele Jay-Russell, Anne-Laure Moyne, and Setareh Shiroodi.  They were participants in round tables and symposia, gave oral presentations and posters, and were co-authors on a variety of collaborative research and outreach projects. Additionally, Aminabadi and Jay-Russell participated in the pre-conference Whole Genome Sequencing Workshop.
A complete program with all abstracts is available here. Feel free to contact us directly for more information on these presentations and abstracts.
Round Tables and Symposia

Harris, L. J., B. Chapman, D. W. Schaffner, M. Danyluk, R. Beckstrand, W. Hallman, A. Jennings, and M. Parish.  2018.  Food Safety Recalls in the Age of Online Grocery Stores (Abstract RT6), Annual IAFP Meeting 2018, Salt Lake City, UT, July 8-11.  Harris was an organizer and panelist.
Ingram, D., M. Jay-Russell, L. Strawn, F. Critzer.  2018. Pathogens in Soil: a Focus on Salmonella and STEC Survival in Biological Soil Amendments of Animal Origin (Abstract S-24), Annual IAFP Meeting 2018, Salt Lake City, UT, July 8-11.  Jay-Russell was a presenter and panelist.

Harris, L.J., R. Cook, J. Gorny, K. Irvin, M. Jay-Russell, V.-L. Scott, and C. Rock.  2018.  Shiga Toxin Producing Escherichia coli and Leafy Greens: Is it Déjà vu All Over Again? (Abstract SRT-1), Annual IAFP Meeting 2018, Salt Lake City, UT, July 8-11.    Organized by Linda Harris; Panelists included Michele Jay-Russell
Jennifer Chase giving an oral presentation on Western U.S. agricultural water
Oral Presentations and Posters (*Presenter)

Aminabadi, P.*, L. Patterson, A. Pires, P. Millner, and M. Jay-Russell.  2018. Field validation of minimum application intervals for raw animal manure used as a soil amendment at a certified organic research farm in California (Abstract P1-180), Annual IAFP Meeting 2018, Salt Lake City, UT, July 8-11.
Aminabadi, P.*, T. Ramos, S. Gartley, X. Wei, A. Zwieniecka, K. Kniel, and M. Jay-Russell.  2018.  Interlaboratory validation of a streamlined method for the enumeration of Salmonella and Shiga toxin-producing Escherichia coli in cattle and poultry manure samples (Abstract P2-184), Annual IAFP Meeting 2018, Salt Lake City, UT, July 8-11.
Barouei, J.*, D. W. Schaffner, and L. J. Harris.  2018.  Modeling the risk of salmonellosis in the North American market from consumption of walnut kernels produced in the United States, (Abstract T1-07), Annual IAFP Meeting 2018, Salt Lake City, UT, July 8-11.
Chen, Z.*, P. Aminabadi, A. Zwieniecka, X. Wei, and M. Jay-Russell.  2018.  Transfer of indicator Escherichia coli to spinach grown in soil amended with raw animal manure associated with heavy winter rains in California, 2016 to 2017 (Abstract P1-189) Annual IAFP Meeting 2018, Salt Lake City, UT, July 8-11.
Feng, Y. (B.)*, V. Lieberman, and L. J. Harris. 2018. An examination of microbiological risks associated with almond soaking and drying, (Abstract P2-81), Annual IAFP Meeting 2018, Salt Lake City, UT, July 8-11.
Gartley, S.*, T. Ramos, E. Nyarko, T. Ribeiro de Souza, M. Jay-Russell, Y. Chen, P. Rivadeneira, P. Aminabadi, R.L. Bell, D. Ingram, J. Van Doren, and K. Kniel.  2018.  Manure pathogen survey of Salmonella and Shiga toxin-producing Escherichia coli in untreated poultry and cattle manure of the Mid-Atlantic region (Abstract P1-143), Annual IAFP Meeting 2018, Salt Lake City, UT, July 8-11.
Jay-Russell, M.*, R.L. Bell, J. Pettengill, P. Rivadeneira, P. Aminabadi, D. Ingram, H. Rand, P. Pandey, J. Van Doren, and Y. Chen.  2018.  Molecular characterization of Shiga toxin-producing Escherichia coli and Salmonella isolates from untreated cattle and poultry manure sources at livestock farms and composting facilities in the Western United States (Abstract T3-04), Annual IAFP Meeting 2018, Salt Lake City, UT, July 8-11.
Jay-Russell, M.*, Y. Chen, P. Rivadeneira, R. Pouillot, P. Aminabadi, P. Pandey, R.L. Bell, D. Oryang, D. Ingram, K. Kniel, and J. Van Doren.  2018.  Prevalence and levels of Shiga toxin-producing Escherichia coli and Salmonella in untreated cattle and poultry manure in the West Coast of United States (Abstract P1-157), Annual IAFP Meeting 2018, Salt Lake City, UT, July 8-11.
Kovacevic, J.*, M. Bunning, C. DeWitt, E. DiCaprio, L. J. Harris, R. McGorrin, M. Morrissey, B. Rasco, and A. Saulo. 2018. Development of add-on training materials customized for the western United States to supplement the standardized curricula for the Food Safety Modernization Act's Preventive Controls for Human Food and Produce Safety Rules, (Abstract P2-08), Annual IAFP Meeting 2018, Salt Lake City, UT, July 8-11.
Li, B*, E. Lipp, J. Maurer, W. Wang, S. Leonard, M. Jay-Russell6, G. Vellidis, M. Mammel, H.i Liu, C. Grim. 2018. Whole genome analysis of Salmonella serovars isolated from produce irrigation water from the State of Georgia (Abstract P2-222) Annual IAFP Meeting 2018, Salt Lake City, UT, July 8-11.

Moyne, A. L.*, L. A. Murphy, M. D. Cahn, S. T. Koike and L. J. Harris. 2018. Impact of irrigation run-off water on the survival of Salmonella and Escherichia coli in soil and on lettuce plants, (Abstract P1-144), Annual IAFP Meeting 2018, Salt Lake City, UT, July 8-11.
Partyka, M.L., R.F. Bond, J.A. Chase*, and E.R. Atwill.  2018. Spatiotemporal variability in microbial quality of western agricultural water supplies: a multistate study (Abstract T11-08), Annual IAFP Meeting 2018, Salt Lake City, UT, July 8-11.
Patterson, L.*, N. Navarro-Gonzalez, P. Aminabadi, M. Jay-Russell, and A. Pires.  2018.  Risk factors associated with Campylobacter prevalence in livestock raised on small-scale diversified farms in California (Abstract P2-58), Annual IAFP Meeting 2018, Salt Lake City, UT, July 8-11.
Ramos, T., Jay-Russell, M., P. Millner, J. Stover, P. Pagliari, M. Hutchinson, J. Liley, F. Hashe. A. Pires*. 2018. Multi-regional risk analysis of manure use: survival and persistence of foodborne pathogens in soil and contamination risk of fresh produce in certified organic farms, (Abstract T3-01)   Annual IAFP Meeting 2018, Salt Lake City, UT, July 8-11.
Ramos, T.*, Jay-Russell, M., P. Millner, J. Stover, P. Pagliari, M. Hutchinson, J. Liley, F. Hashe. A. Pires. 2018. A multi-regional risk analysis of raw manure soil amendment use on certified organic farms: survival of generic Escherichia coli in soil and produce (Abstract T3-03)  Annual IAFP Meeting 2018, Salt Lake City, UT, July 8-11.
Shiroodi, S. G.*, and L. J. Harris. 2018. Survival of Listeria in imazalil with added peracetic acid and in soda ash fresh citrus fungicide solutions, (Abstract P1-184), Annual IAFP Meeting 2018, Salt Lake City, UT, July 8-11.
The next IAFP Annual Meeting will be held in Louisville, KY on July 21-24.
Linda Harris and Anne-laure Moyne at one of their posters
Michele Jay-Russell and Peiman Aminabadi at one of their posters
NEHA 2018 AEC Conference | June 25-28, 2018, Anaheim, CA
Michele Jay-Russell co-presented with Mary McGonigle Martin on The Contemporary Raw Milk Movement at the annual National Environmental Health Educational (NEHA) Annual Education Conference (AEC) held in conjunction with the HUD Healthy Homes Conference. Jay-Russell presented an environmental health perspective on the state-of the-science related to raw milk food safety risks and health benefit claims. McGonigle-Martin shared a personal experience with E. coli O157:H7 infection, and complications from hemolytic uremic syndrome. She also reviewed possible societal and economic reasons for the increasing number of foodborne illnesses in the U.S. linked to raw milk since the early 2000’s, including the concomitant efforts by raw milk advocates to loosen regulations and increase access to unpasteurized dairy products. The next AEC conference will be held in Nashville, TN on July 9-12, 2019.
CPS Research Symposium | June 19-22, 2018, Charlotte, NC
Linda Harris and Setareh Shiroodi attended the Center for Produce Safety (CPS) Research Symposium, where Harris presented a talk on Characterization and Mitigation of Bacteriological Risks Associated with Packing Fresh-Market Citrus on June 20.  Shiroodi was one of four CPS travel grant recipients from across the country. 

Agriculture and Veterinary Science Conference | July 23-August 1, 2018, Davis, CA
The Integrating One Health for Agriculture and Veterinary Sciences conference, held on the UC Davis campus, July 23 – August 1, 2018, is hosted and coordinated by WIFSS, and sponsored by Jiangsu Agri-animal Husbandry Vocational College, and Wuhu Institute of Technology. The conference raises awareness of a comprehensive One Health approach to food safety through education, management, and application of technical services. Twenty-two faculty from Jiangsu Agri-animal Husbandry Vocational College and Wuhu Institute of Technology will participate in conference.
Bennie Osburn and other members of the WIFSS team pose with participants on the first day of the conference
All Hazards Planning and Preparedness Courses | July 10-13, 2018, Burlington and Kelso, Washington
Tracey Stevens and Mike Payne were in the state of Washington during the second week of July conducting all hazards disaster preparedness courses.  On July 10 they were in Burlington, WA conducting a course in AWR 328: All Hazards Preparedness for Animals in Disasters.  On July 12 and 13 they were in Kelso, WA, conducting AWR 328 and MGT 448: All Hazards Planning for Animal, Agricultural, and Food Related Disasters. The timing for the courses was relevant as wildfires were in close by locations.

MGT 448 and AWR 448 are sponsored by the Department of Homeland Security (DHS), the Rural Domestic Preparedness Consortium (RDPC), and WIFSS. DHS gives certificates to those completing the course which can be used as proof of training to become part of a disaster team responding to disasters.
The management level course MGT 448 provides emergency planners, community leaders, veterinarians, animal control personnel, government and non-government agencies and public health agencies with the background information needed to participate in the development of disaster response plans that could be included within the existing operational area.
The awareness level course AWR 328 provides a forum for individuals from many different perspectives to meet together and think through what would be needed in order to effectively respond to a disaster that impacts animals in a rural region in the U.S.

The Poison Terminator Podcast | June 29 2018
Carlo de Olim interviewed Michele Jay-Russell for the 8th episode of his podcast series, The Poison Terminator. They discussed the topic, Important Facts to Know about the Salmonella Outbreak Linked to Pre-Cut Melons including how salmonellosis is diagnosed, treated and what to do if there is a food recall. The podcast series aims to have guests who are experts working in poison control centres, universities, governmental agencies, and citizens promoting healthy practices in their communities.
Dairy Facilities Security Workshop | June 27, 2018, Davis, CA
Dean Michael Lairmore, School of Veterinary Medicine, UC Davis, welcomed participants to a workshop held on the UC Davis campus on June 27, 2018. Attendees at the dairy roundtable workshop included dairy producers, and employees of the U.S. Department of Homeland Security, FDA, and USDA. The FBI workshop was hosted by the vet school and WIFSS. The CDFA and the California Dairy Quality Assurance Program, participated in the program.
Michael Payne gave a presentation on the vulnerability of the dairy industry to criminal acts.

Protecting the food supply requires a robust public health, law enforcement, regulatory, and private sector partnership capable of preventing, detecting, and responding to intentional food borne outbreaks. The objectives of the workshop and table top exercises was to 1) improve incident response planning, 2) increase industry awareness of food defense concepts, 3) identify and implement best practices for food defense, and 4) strengthen partnerships and promote awareness of roles, responsibili ties, authorities, and resources of each stakeholder.
WCAHS Seminar | June 6, 2018, Davis, CA
Rob Atwill presented on Preventative Interventions to Reduce Dairy Worker Infection as part of a series of monthly seminars hosted by the Western Center for Agricultural Health and Safety (WCAHS). Atwill addressed a combination of veterinary and medical school students and faculty, as well as industry professionals, on the potential risks and remedies associated with Cryptosporidium on dairies.


Cookson Beecher interviewed Michele Jay-Russell for a story in Food Safety News entitled No Quick or Easy Answers for Using Raw Manure on Food Crops. The article explores the upsides and downsides of raw manure use in agriculture, and implications for fresh produce growers under the Food Safety Modernization Act, (FSMA) Produce Safety Rule. Samir Assar and Dave Ingram from FDA’s Division of Produce Safety were also interviewed. Assar and Ingram work closely with WCFS scientists to use data generated from our research to inform policy.

For more information related to FDA’s Risk Assessment of Foodborne Illness Associated With Pathogens From Produce Grown in Fields Amended With Untreated Biological Soil Amendments of Animal Origin click here.

Additional Resources:

Raw Manure under the FSMA Final Rule on Produce Safety
Fact Sheet: Biological Soil Amendments of Animal Origin - NEW!
Fact Sheet: Biological Soil Amendments of Animal Origin (Spanish) - NEW!


Patterson, L. N. Navarro-Gonzalez, M.T. Jay-Russell, P. Aminabadi, E. Antaki-Zukoski, and A.F.A. Pires. 2018. Persistence of Escherichia coli in the soil of an organic mixed crop-livestock farm that integrates sheep grazing within vegetable fields. Zoonoses Public Health.

This is the first of several studies being conducted by the Jay-Russell and Pires Laboratories in a unique collaboration with commercial and experimental mixed crop-livestock operations. Major findings included:
  • Mixed crop‐livestock farms integrate livestock and crops using animals to graze crop residues and/or cover crops.
  • As sheep are known to harbor pathogenic E. coli, generic E. coli can be used as a surrogate to study the persistence and transfer of STEC from livestock to soil to produce. Understanding this relationship will help re‐duce microbial food safety risks associated with live‐stock raised on mixed crop‐livestock farms.
  • Developing and validating research‐based waiting periods between grazing and harvest is important to inform best practices for farmers, food safety regulators and policy makers to ensure a safe food supply.


Best of Luck to Melissa Partyka!

We are wishing Missy Partyka a fond farewell as she embarks on a new journey at the University of Auburn with the Sea Grant Oil Spill Outreach Team.  After many years of working on water quality for the Atwill Laboratory and WCFS, she has earned nation-wide recognition as a key player in the development of water quality standards that can be used for helping establish the final recommendation for FDA’s FSMA Produce Safety Rule. She played an integral part in the study design of multiple projects, data management and analysis, and spearheading multiple publications.  

Missy was very important for the WIFSS Outreach and Training program as she participated in a number of outreach programs including those involved in a review and recommendations for the produce outbreak investigation series, training of students, and working with faculty and students from China attending our One Health conferences at Davis.  The conference participants always appreciated her hands-on training in water sampling techniques and record keeping methods.  In addition, Missy was invaluable in her volunteer support during Farm-to-Fork festivities in Sacramento each September where hundreds passed by the exhibit.  We wish her the best of luck in her new Outreach endeavors with the Sea Grant Oil Spill Outreach Team and know that they will benefit from her enthusiasm, creativity, and excellent ability to translate and share research findings.
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