Canadian Poultry Magazine

Features Genetics Research
PIC highlights health and disease research


May 15, 2012
By David Manly


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On May 8, 2012, the Poultry Industry Council (PIC) held its Spring Symposium (formerly known as Research Day) celebrating the career of three distinguished poultry researchers, as well as highlighting research regarding poultry health and disease that it helps fund.

The day began with the presentation of the Poultry Worker of the Year Award to Ian Duncan, who did groundbreaking work on laying hen welfare, and poultry nutrition researcher Steve Leeson. Also honoured was the late Bruce Hunter, a much beloved teacher and researcher from the Ontario Veterninary College. Each award was preceded by a short video featuring colleagues and peers discussing their accomplishments and significance to the field. All of the honorees were emotional and extremely thankful, none more so than Bruce Hunter’s widow, who was noticeably incredibly touched by the kind words said.

The rest of the day was comprised of researchers discussing various aspects of poultry health and disease, beginning with Jean-Pierre Vaillancourt from the University of Montreal, who discussed putting disease into perspective.

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Vaillancourt stated that animal loss due to disease is a continuous and significant problem that claims a large number of animals each and every year. Inside the poultry system, he said, diseases constantly change and adapt and therefore it is a constant battle between management and prevention.

He also said that as density continues to increase, productivity would continue to decrease because production diseases and infection pressure will rise. “The potential costs are huge if we are unprepared,” he said, “and can have major effects on human health as well.”

The second speaker at the symposium was Cindy-Love Tremblay, a PhD student at the University of Montreal working on antimicrobial resistance in birds and how normal gut flora could aquire resistance. Her results have shown that healthy poultry could be a reservoir for resistance genes, which could quickly spread throughout a population of bacteria.

While the research is only in its early stages, Tremblay said that future work could be used to help reduce resistance by decreasing the ability for the bacteria to exchange genes.

Shayan Sharif from the Ontario Veterinary College at the University of Guelph followed with an explanation on the potential uses of probiotics in humans, as well as poultry. According to him, the use of a combination of probiotics in chickens can help modulate the immune response, increase weight gain, improve feed conversion and decrease both mortality and overall parasite/bacteria load.

This was demonstrated in tests with a cocktail of three different probiotic bacteria, and the researchers found that they can help enhance the chicken’s immune response. Research is also being done on the potential antibacterial properties of probiotics with a new cocktail of five different probiotics targeted against a specific strain of Salmonella

Ben Wood, a geneticist from Hendrix Genetics then took to the podium to discuss the challenges associated with selecting for specific traits in turkeys. He said that screening for metabolic disorders with a genetic basis are quite effective, but artificially selecting against behavior and pathogen resistance is more difficult.

The reason for this is because, by selecting for improved resistance, Wood says that the results visibly decrease the presentation of commercially viable traits, such as growth rate and feed conversion. “And until breeders get the word that consumers are willing to pay for less product, “ said Wood, “things aren’t going to change.”

The final scientific presentation was by Michele Guerin from the University of Guelph on the prevalence of Salmonella serovars in breeder flocks in Ontario. The results showed that there was a seasonal difference between Salmonella’s presence in breeders (more pronounced in the fall) and hatcheries (summer), and that the best way to eliminate an outbreak is constant monitoring at the breeder flock and hatcheries across all poultry types. She noted that if she and her research team could gain a better understanding of why these seasonal patterns occur, they could design studies that could show how these infections could be prevented.

Len Jewitt, owner of BLT Farms Inc., a turkey, egg and broiler operation north of Guelph, ended the day with an emotional presentation on the impact of disease at the farm level. Several years ago, one of his layer barns was found to be positive for Salmonella Enteritidis (SE), and he explained that there are many costs to the producer when disease strikes, and these go beyond dollars and cents.

The biggest challenge was the mental cost. “This is something that as an industry, we don’t want to talk about,” he said.

He said the positive result made him feel “like a loser,” and he asked himself what had gone wrong, as he and his employees had been so clean and had followed all necessary protocols. Since the SE occurrence, he says he “is on pins and needles when a swab is taken to see if I’m OK for another year. I’m shooting at something I can’t understand, and praying it won’t hit me.”

He finished his talk with a piece of advice for those who are responsible for going on the farm and beginning the depopulation and disinfection process — to use a gentle hand. “Remember you are walking into someone’s dreams,” he said.