Sepsis is a disease that is caused by a mixed aerobic-anaerobic infection.\nSimply put, sepsis is caused by both microorganisms that live and function in the presence of oxygen (aerobic) and in the absence of oxygen (anaerobic).\nThe anaerobic origin of sepsis is due to the following: as soon as the viral agent enters the body, the bacterial infection will grow as a result of anaerobic metabolism.\n It is worth noting that anaerobes themselves are pathogenic only when the aerobic course of the infection is intense, and direct contact with them in most cases will not lead to the development of the disease due to the high activity of anaerobes only in an oxygen environment. In other words, the activity of anaerobes greatly increases when there is a lack of oxygen, which is observed in patients with airway obstruction.\nIn other words, anaerobes exert their harmful effects when in contact with tissues containing a sufficient amount of glycogen so that it can be broken down, that is, when there is a sufficient amount nutrients during the development of infection.\nThe main symptom of sepsis caused by an anaerobic pathogen is complications such as cardiovascular failure and shock, which threaten the patient's life.\nIt is also worth paying attention to body temperature, which in this condition may remain normal. In conclusion, an anaerobic environment can be dangerous for lung infections, especially in immunocompromised individuals. Sepsis caused by anaerobic bacteria is an extremely dangerous disease that requires immediate treatment.