1.   After isolating potential culprit genes, Kawaoka and lead investigator Masato Hatta repeatedly infected mice with man-made viruses containing one of the suspect genes.

2.   In the second experiment, the scientists infected mice with brain tissue taken from mad cows.

3.   It is known, for example, that sheep prions, which cause scrapie in that species, can also infect mice, rats, mink and other animals.

4.   Scientists at Burroughs had been testing potential anti-AIDS drugs against a similar virus that infects mice, but did not have access to a supply of human HIV cells.

5.   The researchers infected healthy mice with brain tissue from cattle with mad cow disease, or bovine spongiform encephalopathy.

6.   The researchers then ground up the brains of the infected mice and used them to infect healthy mice.

7.   The results were striking because the researchers infected the mice with a different strain of HIV than they used to develop the HIV-vaccine, Sarin said.

8.   The team infected mice with different species of bacteria, and found that pyrrhocoricin protected the animals from bacteria such as Escherichia coli and Salmonella.

9.   Just because milk had not been found to infect mice in laboratory tests did not rule it out as a carrier of the BSE agent, he said.

10.   The study reported that all mice tested became infected with the bacteria within eight weeks of oral inoculation.