Word: bacterias
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Dates: during 1990-1999
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...tests have eliminated live bacteria as a possible cause for the illness, Freeman said. Tests are now being performed to determine if the agent was a bacterial toxin...
...environmental tests, which have discounted such possible causes as salmonella, shigella, campylobacter and yersinia strains of bacteria, were administered by the Centers for Disease Control and Prevention in Atlanta, S.C., and the Food and Drug Administration in Washington...
Thus far, health officials have found no common origin of the mysterious illness. However, incoming tests from patient cultures have now ruled out salmonella, shigella, campylobacter and yersinia strains of bacteria as a potential cause of the illness...
Most notable is the fact that the pasta and the eggs at the salad bar have been temporarily removed because tests showed that those two items did in fact contain abnormal amounts of bacteria, although not enough to have caused the epidemic...
Rosenthal said cultures of stool from affected students and staff had come up negative for bacteria. Tests for blood and water have also been negative. Children's Hospital has also conducted preliminary tests for the roto virus at Harvard, but so far those tests have turned up negative, Rosenthal said...