Non-pathogenic bacteria: can break down lactose

Pathogenic bacteria: cannot decompose

extraintestinal infection

Intestinal infections → serogroups can cause diarrhea

Specimen: Take mid-section urine

For urinary tract infection, it is necessary to count the community size, and ≧100,000/ml can have diagnostic value.

my country's health standards stipulate that the number of coliform bacteria per liter of drinking water shall not exceed three, and the number of coliform bacteria per 100ml of bottled soda, juice, etc. shall not exceed five

Invasiveness (pilus)

endotoxin

Exotoxins

Acute dysentery: The patient presents with fever, abdominal pain, diarrhea, tenesmus and other symptoms, accompanied by pus, blood and mucus in the stool.

Toxic dysentery: It is more common in children and manifests as high fever, toxic encephalopathy, etc., which causes great damage to the brain.

Chronic dysentery: the disease lasts for more than two months

Salmonella typhi

Salmonella Paratyphi A

Salmonella shawii

Salmonella hisi

Enteric fever (typhoid and paratyphoid fever)

Acute gastroenteritis (food poisoning)

septicemia