He said investigators were working under the "thesis" that the Daschle letter was the source of contamination among the postal workers.
In any event, the presence of mouse DNA in these cells must be considered as the source of contamination reported in this experiment.
FORBES: Big Study Linking Chronic Fatigue To Virus May Be Fatally Flawed
Although ice can become contaminated, researchers ruled it out as the source of contamination after testing revealed that it did not contain coliform bacteria.
Vegetables that grow on the ground are more likely to be contaminated with bacteria, since runoff from animal waste is likely the source of contamination.
The source of contamination - an 80, 000-kg batch of fat that a Belgium company sold to feed mills supplying European farms - did not only contain dioxin.
He says the memo speculates about a possible source of contamination -- sushi -- but he says the FDA doesn't know the origins of the outbreak at this time.
In early May, a study by Ireland's nuclear watchdog - the Irish Radiological Protection Institute -claimed that radioactive discharge from Sellafield continued to be the dominant source of contamination in the Irish Sea.
Excavations are currently being done on the beach to determine the extent and source of the contamination.
BBC: Dalgety Bay radiation: Particles pose 'low risk' to public
Three companies in India have been identified as the source of the contamination, and have had their licence to trade suspended by the Indian Spice Board pending further investigation.
Germany, Spain, and the EU Commission are all conducting separate investigations, but Spanish officials say Germany is taking too long to release results, adding to the uncertainty over the source of the contamination and thus hampering efforts to contain it.
Santia Consulting Ltd issued a statement on Friday saying the source of the asbestos contamination in the school "still remains in place consisting of substantially damaged asbestos insulating boards (AIBs) in the ceiling voids, damaged AIB in the room heaters and repeated damage of AIB window panels within classrooms".
BBC: Asbestos: More concerns over Cwmcarn High School future
The goal was to help the regulators track the source of any groundwater contamination that might occur at or near a drilling site.
Popular in this corner of southeastern Massachusetts, yo-yoing is reviled by many sports anglers as unsportsmanlike and a potential source of toxic lead contamination to the fish -- and the people who eat them.
WSJ: For Massachusetts Fishermen, A Weighty Debate About Fair Play
Lettuce and other leafy vegetables are healthy for you, but they are also the largest source of food-borne contamination in the U.S., according to a new government report.
WSJ: Vegetables Are the Main Cause of Food-Borne Illness, CDC Study Finds
Gaza's only fresh source of water is too dangerous to drink because of contamination by fertiliser and human waste, a new report says.
Ostensibly, Obama made the decision to block the pipeline because of concern over contamination of the Ogallala Reservoir, a vast underground water source that makes much of Midwestern agriculture possible.
Contrary to the claims of know-nothing critics like Bittman, such products are not only environmentally superior to conventional and (especially) organic offerings but would also offer the food industry a proven and practical means of tackling the fungal contamination at its source.
FORBES: Bittman of the 'New York Times': Always Out To Lunch
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