1.   Bacteria invaded and caused an infection.

2.   It also plays a role in tricking healthy cells into letting the bacteria invade them.

3.   The infection occurs when bacteria, usually from the intestinal tract, invade the urinary system.

4.   The purpose was not only to see that no earth bacteria invaded the specimens before analysis, but to prevent the escape of any brought from the Moon.

5.   They set out to study what happens when bacteria that are harmless in the mouth invade the bloodstream.

6.   This vaccine is given to prevent lockjaw, a disease caused when bacteria invade the body through cuts.

7.   When the bacteria invade deep into the body, they can cause life-threatening blood infections, meningitis, pneumonia and arthritis.

8.   Bacteria invaded the reservoir and fed on the oil and gas, he added.

9.   Cystitis is caused when the bladder becomes inflamed because it has been invaded by bacteria that normally live in the bowel.

10.   Once the salmonella bacteria invade intestinal cells, the bacteria die, their cells break apart and the HIV DNA they carry is released.