File:Clostridium difficile spore.gif

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current	23:26, 16 July 2013		456 × 444 (165 KB)	Lillian.V.Flannigan-1 (talk \| contribs)

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<ALT>andlt;strongandgt;andlt;emandgt;Clostridium difficile.andlt;/emandgt;andlt;/strongandgt; ColouredScanning Electron Micrograph (SEM) of andlt;emandgt;C.andlt;/emandgt;andlt;emandgt;difficileandlt;/emandgt; bacteria. The rod-shaped cells ofthis anaerobic, gram-positive species have abumpy, irregular surface. andlt;emandgt;C. diffi- cileandlt;/emandgt;normally exists in small numbers in the human gut.It can proliferate, producing a toxin thatirritates the colon and causes diarrhoea, when an-tibiotic treatment kills other bacteria inhabi-ting the intestines. In severe cases this leads topseudomembranous colitis (PMC), where mucus anddead cells build up in plaques on the walls of thecolon. PMC can be treated with an antibiotic butrelapses are common because the bacteria can formhighly resistant spores. Magnification unknown.
<COPY>D. PHILLIPS/SCIENCE PHOTO LIBRARY