1.   A federal judge in Oregon ruled Tuesday that lawyers cannot introduce evidence that says breast implants cause disease, because such evidence is not scientifically valid.

2.   A researcher who wants to know whether a certain gene causes disease in a given cell might create a gene chip to test the proposition.

3.   But the presence of C. pneumoniae in the plaques is not enough to prove it causes coronary artery disease or heart attacks.

4.   But they believe the same bacteria that causes gum disease may also trigger formation of the plaque that blocks or hardens arteries.

5.   Did silicon breast implants cause disease?

6.   It also means the spores are not small enough to easily enter the lungs and cause disease, health officials said.

7.   It also marks the first time a jury will consider whether tobacco smoke in the environment, rather than smoke specifically inhaled by smokers, causes diseases.

8.   No one has yet shown that a normal prion can be transformed into an abnormal prion and then cause disease.

9.   Other strains of the same bacterium cause disease in poultry and other birds, and some strains can infect the respiratory tracts of chickens and reduce egg production.

10.   The accumulation of aberrant proteins in the brain cause diseases like mad cow disease, scrapie insheep and Creutzfeldt-Jakob disease in humans.