Escherichia coli, or in a glance E. coli, typical Bacillus gram-negative family that is common in the intestines of warm-blooded animals there. Most strains of E. coli, are not harmed, but some of The such as O157:H7, cause food poisoning and diarrhea. This strain, harassment, etc. part of the flora of the normal intestine. It is in the production of vitamin K2 play a role, and of the establishment of pathogenic bacteria in the intestine prevent. The bacteria, 0/1%, and the intestinal flora have to be allocated. This bacteria, through the path of fecal-oral route (oral - fecal) from one person to the other person passed.

the most common agent of urinary tract infection, which is about 90% of urinary tract infection in young women dedicated to the. Clinical signs of this infection for frequent urination, etc. burning, urinary, etc. blood in the urine and pus in the urine.

drift (divergence) free, and salmonella, at around 102 million years ago (between 57 to 176 million years ago) coincides with the derivation and evolution of host their happened: , mainly in mammals can be found, and salmonella in birds and reptiles can be found. After that, the derivation to 5 species E. albertii, etc., E. coli, E. fergusonii, etc., E. hermannii and E. vulneris have occurred. The last ancestor to E. coli., the 20 to 30 million years ago, the derivation the findings.

in 1885, the first time Theodore (Theodor Escherich), the bacteria in the feces of healthy people, finds it Bacterium coli commune called. Then, in 1895, by (Migula), a bacillus (Bacillus coli) was called, and later in the sex (in honor of its discoverer) re-classified. belongs to a group of bacteria called total coliform (coliforms). It is a member of the family .