Clostridium histolyticum is a bacterial species that causes a variety of diseases in humans and other animals, including typhoid fever, peritonitis, pseudomembranous colitis, and those diseases called cryptogenic. Diseases caused by this type cause severe discomfort and pain in the patient, which makes his life uncomfortable. There are many measures to prevent infection through various routes of entry into the body. These include both external factors, such as washing hands with soap, and internal factors that affect the immune system, such as vaccination. The relevance of such an article lies in the fact that many people do not know about the presence of this bacterium in their body, since the symptoms are not always obvious. The article will be useful for those who plan to go into medicine or deal with infections in order to better understand the essence of infections using the example of typical diseases caused by bacteria and the manifestations of these diseases.