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Microbiology

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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.

viruses

SUPERSIZE ME   The more scientists look, the more giant viruses pop up. The viral behemoths, which largely infect amoebas, may be common worldwide. 

tattoo

TAIL TATS  When researchers tattooed mouse tails, the only cells found with ink inside were macrophages. The tattoo appeared the same before (left) and after (right) ink-holding macrophages were killed, because it was recaptured by new macrophages.

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