Household consumption fell in 2009 as a whole but sales of beansprouts, a classic belt-tightening purchase in Japan, jumped by more than 10%.

家庭消费在2009年整体下降但是豆芽菜的销量却跳升了10%还多，在日本，豆芽菜是勒紧裤带度日的传统食品。

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The researchers say that in tests on hamburgers, apple juice, beer and beansprouts, the test successfully picked up within 15 minutes.

BBC: Speedy 'burger bug' test