Blood culture is an artificial culture method in which fresh blood samples in vitro are inoculated on nutrient medium to make bacteria with high nutritional requirements grow and reproduce under certain conditions such as temperature and humidity, and then the pathogens are identified. Used for etiological diagnosis of bacteremia, septicemia and septic septicemia. It usually takes 5-7 days to report.

Anaerobic bacteria are the main normal flora in human body, and bacteroides are the most common in oral cavity, intestine, urinary tract and female reproductive tract. Clostridium mainly exists in the upper respiratory tract and oral cavity; There are digestive cocci and streptococcus in the intestine, mouth, vagina and skin. Propionibacterium often exists in skin, upper respiratory tract and vagina; Micrococcus exists in oral cavity, upper respiratory tract, vagina and intestine.

Extended data Anaerobic bacteria are a kind of bacteria that grow better under anaerobic conditions than under aerobic conditions, but cannot grow on the surface of solid media with air (18% oxygen) and/or 10% carbon dioxide concentration.

This kind of bacteria lacks a complete metabolic enzyme system, and its energy metabolism is carried out through anaerobic fermentation.

It can cause infections in different parts of human body, including appendicitis, cholecystitis, otitis media, oral infection, endocarditis, endometritis, brain abscess, myocardial necrosis, osteomyelitis, peritonitis, septic arthritis, liver abscess, sinusitis, wound infection after intestinal surgery or trauma, pelvic inflammatory disease and bacteremia.

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