Commensal majority
Most strains stay in the colon and do not invade.
Identity is a Gram-negative rod of the gut, used as a water marker, and split into commensal versus pathogenic types.
Calling every E. coli a germ erases the neighbor that already lives in most people.
Traits
Pathotype minority
STEC, ETEC, EPEC and others are defined by toxin or adhesion toolkits.
O and H names
Lipopolysaccharide and flagellar antigens give outbreak filing names such as O157:H7.
Indicator role
Finding E. coli in treated water is a process-failure signal.
Lab domestication
K-12 lost many wild traits over decades. That history is not a home protocol.
Plasmid luggage
Some virulence and resistance genes ride mobile DNA between strains.
Outbreak names like O157 are serotype labels, not moral ranks.
Keep exploring
More in Encounters
Influenza
A winter respiratory virus of drift and rare shift — surveillance and vaccines, not a cartoon villain.
Familiarity 93Tuberculosis
An airborne bacillus of latency and long care — programmes and air, not a drug recipe.
Familiarity 70Staphylococcus aureus
A common skin neighbor and a resistance story called MRSA — not scare porn.
Familiarity 78Norovirus
A very-low-dose gut virus of schools and ships — soap and bleach surfaces, not alcohol-gel faith.
Familiarity 80Helicobacter pylori
A gastric spiral that rewrote the ulcer textbook — Nobel 2005, Korea's high historic prevalence, no recipes.
Familiarity 68