Hospitals world-wide battle nosocomial infections on a daily basis. One of the most difficult bacteria to combat is Clostridium. difficile.

和院内感染斗争是全世界的医院每天必作的功课，其中艰难梭菌是最难消除的菌种。

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Mark Mellow of the Baptist Medical Centre in Oklahoma City uses such faecal transplants to treat infections of Clostridium difficile, a bug that causes severe diarrhoea and other symptoms, particularly among patients already in hospital.

ECONOMIST: The human microbiome

But ViroPharma, a small Pennsylvania company, is developing a nontoxic strain of Clostridium difficile to help treat hospital infections.

FORBES: Our Germs, Ourselves

The number of deaths from two hospital infections, MRSA and Clostridium difficile, has fallen between 2010 and 2011, according to figures for England and Wales.

BBC: MRSA and C. diff deaths falling