But it didn't prevent illness completely, said Nicole Guiso of the Pasteur Institute, one of the researchers.

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In 1970, Professor Boulahbal became head of the laboratory of tuberculosis and mycobacteria at the Pasteur Institute in Algiers.

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From 1996 to 1999, she was co-director of the National Reference Centre on Mycobacteria in the Pasteur Institute in Paris.

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When Paul Reiter, an expert on insect-borne diseases at the Pasteur Institute, begged to differ pointing out that malaria's range was shrinking and was limited by factors other than temperature he had an uphill struggle.

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Given the recent unravelling, by the Pasteur Institute in France, of the genome of Mycobacterium leprae, the organism that causes the disease, science is better poised to carry out such research than ever before.

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France's Pasteur Institute confirmed the case Wednesday.

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