11.   The less serious form of anthrax, caused when the bacteria infect the skin, results in more limited swelling that is easier to treat.

12.   The work also sheds light on the way bacteria infect both humans and plants and thwart their defenses.

13.   Two years ago, cholera-like bacteria infected Gulf Coast oysters and sickened hundreds of people who ate them around the country.

14.   Blaeker told journalists no-one knew how the bacteria could have infected the equipment or the unit for premature babies.

15.   When their hooves become infected by bacteria they cannot stand any longer, so they cannot feed and they die.