You can detect just few infected cells by a million normal cells.

　　Dr. Lopotko says when researchers tested the device it was never wrong, and it was able to find malaria infection early, when treatment is very important.

　　The device can be carried, and depends on battery power. It costs about $10,000 to $20,000 to manufacture. But Dr. Lopotko says that is not a lot of money if one considers the number of people it can test.

　　Each device will be capable to screen more than 200,000 people per year. So the cost of analysis for each patient will be less than 50 cents.

　　People without medical training can use the device to discover whether people are infected with malaria.

　　Dr. Lopotko says the light beam has shown to be safe in volunteers. Researchers will now test the device at a Houston hospital that cares for patients infected with malaria. If those tests are successful, researchers will test the device throughout the world this year.

　　A report describing the malaria detection device was published in the journal Proceedings of the National Academy of Sciences.

　　This Science in the News was written and produced by Christopher Cruise, from reports by Carol Pearson and Jessica Berman in Washington.

　　Im Anna Matteo.

　　And Im Christopher Cruise.

　　Join us again next week for more news about science on the Voice of America.

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