Some Genetically Modified Foods (GMOs) include Bt genes obtained from Bacillus thuringiensis which is soil bacterium. Bt gene make foods resistant to insects.

B. thuringiensis itself has been used as an insecticide for many years and it is preferred to decrease toxic chemical usage to in USA and Europe. But nowadays, transgenic Bt corn, cotton potato, tomato and rice are grown instead of Bt sprey usage. The most common grown one is Bt cotton.

Although it seems that Bt products are beneficial due to decreasing of chemical pesticide usage, they have serious harmful effects. Bt product may make insects resistant to Bt endotoxin. This will leave people, who deal with organic agriculture, in difficult situation. They will may have difficulties to find natural alternative methods. Researches from North Carolina University determined Bt resistant gene in hawk-moth which eat corn.

Spray Bt breaks down in soil, and it can be removed from products by washing. But it is impossible to remove Bt toxin from Bt products. So Bt toxin resume its effect until the product is consumed. The long-term effects of the Bt include products aren’t known.

It was found that village who live near corn farm in Philippines have respiratory, digestive system and skin problems. This problems especially occurs during pollen spread term. It has also found that Bt has adjuvant effect.

Studies on mouses showed that Bt toxin causes structural changes of intestine. Animal researches also showed that Bt toxin is active in mammals, it doesn’t breakdown during digestion, it can adhere intestine and it threaten the human health.

On the other hand, Environment Protection Administration (EPA) determined that Bt toxin is digested in stomach. But the tests we carried out in laboratory condition and the results are not accurate.

• Advantages Of Genetically Modified Foods
• Disadvantages Of Genetically Modified Foods