11.   Researchers insert the luciferase gene into the TB bacteria and allow the bacteria to multiply.

12.   The bacteria multiply and are inadvertently spread around in cleanup efforts.

13.   The bacteria multiply and poison the host within two or three days.

14.   There, they turn into bacteria, and the bacteria multiply and produce toxins that attack body tissues.

15.   When the bacteria multiplied, they made insulin that could be extracted for use as medicine.

16.   Inside the body, the bacterium multiplies and produces toxins that kill cells that keep the respiratory tract clear.