Word: bacterium
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Healthy Appetite. Chakrabarty first determined that the genes for oil-degrading enzymes were carried not on the microbes' chromosomes, where most genetic material is found, but elsewhere in the cell. He discovered that although the "plasmids," as these genes are called, were isolated and transferred from one bacterium to another easily enough, the two batteries of genes he tested would not stay together in the same cell; nor could cells of different strains be paired. When they were, the bacteria competed with and inhibited each other...
...practical; spruce and balsam are best adapted to the north woods and, says Fred Holt, director of Maine's bureau of forestry, "they always come back when you plant something else." Biological controls-most notably one that involves spraying the foliage with a solution containing Bacillus thuringiensus, a bacterium that kills only caterpillars-are still too expensive and difficult to apply over a wide area...
...said the organism, which affected more than 20 people who ate seafood newburg at Cabot and Whitman Halls, may be a rare variety of salmonella. "If a common strain of bacterium reacts in a common way it takes about 48 hours to identify; if less common, it takes longer," he said...
University Health Services last week hired Wilfred B. Krabek, retired UHS inspector, as a special consultant to try to identify the still-undetermined strain of bacterium responsible for the March 27 South House food poisoning...
What makes the prospect especially hazardous is that one of the molecular biologists' favorite tools is the bacterium Escherichia coli, which inhabits every human bowel, is present in normal excrement and is highly amenable to laboratory manipulation. Its natural form is dangerous only when it runs rampant in an accidental or surgical wound or in organs other than the gastrointestinal tract. But a laboratory mutant might cause a plague of infectious disease resistant to available antibiotics. Altered DNA can be dynamite...