It could have appeared to come from people because of accidental contamination, she said.

Unless this was simply some accidental contamination of his culture, not common to the other samples.

However, accidental contamination of commercial vaccines can cause severe problems.

Has there been accidental contamination or is the problem a consequence of the normal manufacturing process?

This also raises the question of whether accidental contamination can be avoided completely.

The island was chosen as a safeguard against accidental contamination.

Human interaction with objects poses a threat of accidental contamination.

"Accidental contamination seems the most plausible explanation to these incidents," it said.

If it matches, one diplomat said, that would tend to support accidental contamination.

The most likely explanation is that it was as a result of accidental contamination within the factory, which also makes pork based products.

However exposure due to accidental contamination in feed mills might have occurred.

This accidental contamination can cause organic farmers to lose a lot of money because they need to recall their products.

Sufficient space or barriers must be put in place around organic storage areas to stop accidental contamination.

Regarding his 1998 crop, Schmeiser did not put forward any defence of accidental contamination.

During his trial, Kofoed blamed the speck of blood found in the car on accidental contamination.

Or did one of the laboratories have an accidental contamination from some other samples shipped between them in 1983 or 1984?

The buildings have been closed since May 16, 2002, due to accidental contamination of the water with ethylene glycol.

Allowing the anaphylactic child to keep the same locker and desk all year may help prevent accidental contamination.

Accidental contamination is a highly emotional issue.

Cutting in, Faykan said, "We have destroyed them all, so as not to risk accidental contamination."

Accidental contamination is also a problem, caused by poor hygiene, particularly in rural areas, and weak quality control by regulators.

Marlene Johnson, a truck stop operator, said she feared accidental contamination from trucks carrying the waste through town.

Bans altering the environment of celestial bodies and requires that states must take measures to prevent accidental contamination.

Mr Mariné there have been several cases of accidental contamination in Spain and elsewhere.

There is a lot of potential there, but it can also mislead consumers because of accidental contamination.