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Prohibited: Comparison photos of GM/non-GM
"Brian Sandle" wrote in message ... Gordon Couger wrote: "Brian Sandle" wrote in message snip It also advocates removal of antibiotic resistance genes from GM constructs used in the production of food, but falls short of calling for their removal in animal feed, even though there is growing evidence that bacteria can pass from farm animals to human beings - E. coli 0157 is a well known example. There a large number of diseases that are transmittable from farm animals to man. Anthrax, bruculosis, tuberculosis, leptospiris, a half dozen parasites and flu often passes from birds to pigs to man just to name a few. E. coli O157 is not normally transmitted to people unless they are raised in isolation from livestock a practice that has only been common in the last 50 years. Any one that is around livestock on a regular basis does not catch it. If they are able to build resistance. Maybe it used to be part of infant mortality. I have never heard of any cases of infant mortality from diseases from animals. In the 50 years we have been feeding animal anibiodics infant mortalty has decreased substantialy. We feed the livestock a lot more antibiotics as growth promoters that would cause resistance more than any possible unproved transfer from feed. We have been doing for 50 years with out a problem and they still are antsy about it. You can find antibiotic resistant bacteria in the most remote places of the world. If we were going to create an antibiotic resistant e. coli O157 the antibioses we feed cattle are lot more worrisome. The antibiotics provide the selective force and the bacteria can pick up resistance genes from the food, since they are constantly present. That's right but 50 years of use haven't produced any resistant bacteria problems in humans that can be traced to the farm. We do have animal diseases that are resistant to antibiotics but they don't seem to be traced to feeding either. Hospitals, jails and other areas where people are confined and treated with anybodies produce problems. Many of the problem are created by people not completing the regime of antibiotics in disease like tuberculosis,malaria and other diseases that take long term treatment. Most of the diseases that humans can catch from livestock have been eradicated or nearly eradicated for both the human health point of view and economic point of view. The main disease we have problems with antibiotic resistance is shipping fever in cattle. It is not shared by humans and it symptoms are similar to a cold but the very low lung capacity of cattle quickly turn into a very serious problem with any secondary infection. The genetics of e. coliO157 indicate it has been around hundreds of years and can be found in every corner of the world. In 50 years of feeding antibiotics and using antibiotics it should have developed resistance if it was going to. Some classes or antibodies are not allowed for use in livestock out of concern that they will cause a problem. They are limited in humans as well to multiple antibiotic resistant infections. Antibiotic resistance is real problem but the antibiotic restraint gene that is used in plants is for tetracycline one of the most used antibiotic in livestock. It is far more likely that bacteria will acquire it from the use of the antibiotic in cattle or from the may tetracycline resistant bacteria in wild life and water ways. There is a substantial amount of antibiotics that go though the sewage treatment plant and are spread in our rivers. The relative risk of the unproved speculated risk of an antibiotic resistant gene causing a problem compared to the real problems of antibiotics in the environment are like trying to drain Lake Michigan with a tea cup. If it did happen you couldn't see it for all the other exposures that bacteria have to tetracycline. Gordon Gordon |
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