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Surveying the Swiss: The eyes have it

Food scientist Moshe Rosenberg of the University of California, Davis has found that magnetic resonance imaging, or MRI, can help determine the health of a wheel of cheese.

The size and distribution of holes, or eyes, in Swiss cheese contribute to its commercial value, says Rosenberg. Other cheeses, such as cheddar, should be free of eyes.

To evaluate the holes, which deliberately added gas-producing bacteria create, cheese makers currently bore or slice into a few cheese wheels from a larger batch. Since most wheels aren't directly tested, quality becomes a game of chance, Rosenberg says. Even worse, if the eyes are unevenly distributed, a borehole might not accurately represent an entire wheel.

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