How on-farm food safety programs get developed - it's the people, and data
There was this time, we thought we’d killed Chapman.
Ben and I went along with Uncle Denton to the Canadian Horticulture Council meeting in Montreal in Feb. 2003. I had chaired a national committee on on-farm food safety program implementation – and the advice was completely ignored – Chapman and I had done years of groundwork with Denton and the Ontario Greenhouse Vegetable Growers, and we agreed to share a room at the annual meeting to cut down on expenses.
There was a couple of receptions and I still remember Ben and I asking Uncle Denton for drink tickets. We then retired to a hotel lounge and I knew trouble was ahead when Chapman asked for a cigarette.
He then went to the bathroom.
He didn’t return.
He showed up a few hours later, seemingly intact.
Denton had forgotten that story (Denton's on the right in that pic with my grandfather, Homer) when I called him a couple of weeks ago, to thank him for the opportunity to develop on-farm food safety stuff back in 1998 with the Ontario Greenhouse Vegetable Growers. I’ve been using those anecdotes (not the ones about Chapman) and lessons learned a lot lately – seems like too many people are in a food safety time warp.
Guess it brought up a few memories for Denton, who wrote this in Sept.’s issue of The Grower:
As you journey through life you meet the occasional person who makes a real difference. Dr. Douglas Powell is one of those – to say the least.
Doug called me recently to talk about the early years. He was new in the On Farm Food Safety business when I was working with the Ontario Greenhouse vegetable group. Doug was at the University of Guelph and I would talk to him about the phone call I didn’t want to get. This would be the imaginary call from a senior’s residence wondering why all the occupants were very sick after consuming a fresh salad, and if the cause may have been the greenhouse tomatoes. I never got that call—thank God--but I wanted to be ready. And that readiness included a strong response indicating we had an On Farm Food Safety program and proof we were capable of tracing our greenhouse product. We’ve seen several incidences in the past few years with certain fresh veggies and berries that almost ruined the industry and certainly crippled those markets for a year or so.
From the University of Guelph and the beginning of the On Farm Food Safety program, Doug has moved to Kansas State University where he is associate professor of food safety. He is still very much in the industry – just relocated to a different university -- and still writing newsletters, hence the reputation of “the guru” of On Farm Food Safety.
Doug has remained a good friend over all these years. We developed a bond as we developed an On Farm Food Safety program for greenhouse vegetables and more. Doug’s philosophy was to keep it simple. He could relate to growers, and had an uncanny ability to make the complicated science of bacterial contamination simple and understandable. Early on, he received a little help from Dr. Gord Surgeoner. These were the seeds of the On Farm Food Safety program in Canada, spreading from Ontario Greenhouse to CHC and to most vegetable growers across Canada.
I can still see Doug in an old T-shirt and jeans, holes in both, and running shoes--that was his fashion statement. Of course, his description of toilet paper “slippage” resulting in fecal contamination on your finger was priceless, but his crude description helped to break down the mystery of bacterial contamination by food handlers with dirty hands. Seems to me I got a T-shirt from Doug with “Don’t Eat Poop” written on the front. Doug continues to be a great communicator, a fair goalie, poor at politics but great at On Farm Food Safety and raising little girls.
Thanks, Doug. I am proud to say I knew you back when.
And I knew Chapman, way back when.
Greenhouse vegetable food safety: Watch those dirty boots
The authors isolated Salmonella Montevideo, Salmonella Newport, and strains of the F serogroup from tomatoes and go on to state that almost all of the Salmonella Newport strains were isolated from samples collected during or immediately after the flood.
Analysis by pulsed-field gel electrophoresis revealed that some Salmonella Montevideo isolates from tomatoes, opossums, and mice displayed identical genetic patterns, suggesting that these wild animals represented a potential source of contamination.
The fun part of paper is that the authors suggest that dirty work shoes were also thought to be an important vehicle for dissemination of Salmonella into (and possibly throughout) the greenhouses (especially after being worn during the flood incident):
Contaminated worker shoes may be vehicles for contamination with enteric pathogens, from either outside the greenhouses or from one facility to another. The levels of E. coli on personal shoes were higher than those of working shoes were before the flood. However, there was a higher level of contamination with Salmonella and E. coli on working shoes compared with personal shoes after the flood.
The authors go on to say that sanitary mats intended to reduce pathogen movement may not be all that effective the real-world application:
Working shoes were provided by management to the workers to wear inside the greenhouse at the suggestion of our research group after finding that personal shoes were positive for E. coli, even after shoes received a disinfection treatment with quaternary salts solution (800 ppm) on a sanitary mat. However, working shoes were not used exclusively inside the greenhouse, but were also worn to go from one facility to another. Shoes have seldom been mentioned as vehicles of contamination in food production areas. This dissemination mechanism of enteric pathogens should be considered as an important control point during working procedures in greenhouses.
It's unclear whether this is just a notable finding, or if it represents a real risk in moving pathogens around food production systems, and needs some further investigation. Probably don't want to use boots to stomp garlic though.
