MicrobeWiki: Clostridium - Classification, description and significance, genome structure, cell structure, metabolism and ecology. eMedicine - Gas Gangrene - Article by Hoi Ho, MD. eMedicine - Gas Gangrene - Article by Wende R Reenstra-Buras, MD, PhD. Wikipedia: Clostridium - Encyclopedia article on this genus of bacteria, the diseases they can cause and their commercial uses. NHS Choices: Clostridium difficile - Provides a short video and details of symptoms, causes, diagnosis, treatment and prevention. Clostridium perfringens, tetani, botulinum, difficile - Medical and scientific information on these bacteria and the diseases they cause. MedlinePlus Medical Encyclopedia: Gas Gangrene - Includes cause, symptoms, diagnosis, treatment, and prevention.