So Glaxo added adjuvants, substances that bolster immune response, including a bacterial wall extract and a detergentlike substance from the soapbark tree.

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Hospitals, labs and research facilities buy the kits to test for conditions including streptococcus bacterial infections, mononucleosis, parasitic diseases, lyme disease, herpes, chicken pox and shingles, as well as E. coli, transplant infections and respiratory diseases such as pneumonia.

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In the U.S., about 4, 100 cases of bacterial meningitis, including 500 deaths, occurred between 2003 and 2007, the CDC reports.

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When they mixed their artificial biochemicals (including the unnatural amino acid) with a bacterial extract that contained ribosomes and all the appropriate enzymes, Dr Hirao and Dr Yokoyama found that the unnatural additions were treated just like their natural analogues.

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One of Witty's first moves in 2009 was to create a tiered system that lowered prices for various drugs for emerging markets, including medicines for asthma, allergies, hepatitis and bacterial infections.

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The agency says some drugs should never be taken with Mevacor including protease inhibitors, a class of HIV drugs and certain drugs used to treat bacterial and fungal infections.

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