Comments on: A few thoughts on food safety http://downtoearthblog.com/health/a-few-thoughts-on-food-safety/archives/242 Facts, opinions and reflections on being a techno-geek granolarancher Mom Thu, 17 May 2012 22:00:27 +0000 http://wordpress.org/?v=2.2.2 By: Sara http://downtoearthblog.com/health/a-few-thoughts-on-food-safety/archives/242#comment-31107 Sara Fri, 18 Feb 2011 14:19:30 +0000 http://downtoearthblog.com/health/a-few-thoughts-on-food-safety/archives/242#comment-31107 Thanks Matt. That really makes me think that the health (translating to ability to resist Salmonella) of the chicken is important, as is the cleanliness of the environment. Stress, such as is experienced in most modern production systems, is a huge factor in disease resistance. Thanks Matt. That really makes me think that the health (translating to ability to resist Salmonella) of the chicken is important, as is the cleanliness of the environment.

Stress, such as is experienced in most modern production systems, is a huge factor in disease resistance.

]]> By: Matt D.V.M. http://downtoearthblog.com/health/a-few-thoughts-on-food-safety/archives/242#comment-31078 Matt D.V.M. Thu, 17 Feb 2011 16:02:27 +0000 http://downtoearthblog.com/health/a-few-thoughts-on-food-safety/archives/242#comment-31078 "However, even the cleanest hen house will still produce eggs with salmonella on the outside" While external contamination of an egg by Salmonella spp. is a potential source of zoonotic infection, the yolk is a common source of infection. Salmonella spp. are transmitted trans-ovarian in the hen to the yolk of a developing egg. Hygine of the egg plays no role in affecting trans-ovarian transmission. Proper cooking will eliminate an infected yolk as a source of infection. You did a good job of explaining that there are normal flora E. coli isolates that don't cause disease. In fact, many of the organisms in a chicken or cows feces are host-adapted and probably wouldn't cause disease in a healthy human. Matt “However, even the cleanest hen house will still produce eggs with salmonella on the outside”

While external contamination of an egg by Salmonella spp. is a potential source of zoonotic infection, the yolk is a common source of infection. Salmonella spp. are transmitted trans-ovarian in the hen to the yolk of a developing egg. Hygine of the egg plays no role in affecting trans-ovarian transmission. Proper cooking will eliminate an infected yolk as a source of infection.

You did a good job of explaining that there are normal flora E. coli isolates that don’t cause disease. In fact, many of the organisms in a chicken or cows feces are host-adapted and probably wouldn’t cause disease in a healthy human.

Matt

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