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Microbiology

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dog

DOGGING IT  Some dogs in southern China carry flu viruses originally transmitted from pigs. The viruses probably spread most easily where animals are crowded, such as shelters, farms and markets.

E. coli

BAD BLOOD A strain of E. coli (computer-generated image above) that causes severe diarrhea can latch onto intestinal cells more easily in people with type A blood, a discovery that hints at a potential vaccine.

virus illustration

BACTERIA-HUNTING VIRUSES  Viruses (one illustrated, center) can be engineered to carry magnetic nanoparticles and modified DNA, transforming them into nanobots that detect bacteria in water or food.

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