When an external magnetic field is applied to a material, these current loops tend to align in such a way as to oppose the applied field. This causes all materials to be repelled by a permanent magnet; however, the resulting force is usually too weak to be noticeable.
Sources of E. coli. E. coli O157:H7 is most commonly found in cows, although chickens, deer, sheep, and pigs have also been known to carry it. Meat becomes contaminated during slaughter, when infected animal intestines or feces come in contact with the carcass.
E. coli lives in the lower intestine of warm-blooded animals, including humans. Itâs one of many bacterial species that inhabit our digestive tract in large numbers. In fact, there are more bacterial cells in our digestive tract than there are human cells in our bodies!