Pretty much all the nastiest disease bacteria have evolved immunity to all the antibiotics. Different species of bacteria spread immunity by exchanging plasmids which encode the immunity.
This predicament came about for a number of reasons:
- Bacteria evolve 1000 times faster than humans.
- Putting antibiotics in chicken and cattle feed to promote growth.
- Antibiotics are available over-the-counter in the third world.
- Doctors prescribing antibiotics for viral or unknown infections just to please the patient.
- Patients stopping antibiotics as soon as they feel a little better.
- Antibiotics also kill good and neutral bacteria freeing sites for pathological bacteria.
I have done some study on the great plague that swept through Europe. They were far more horrible than almost anyone realises. Other than our improved sanitation, we are almost as vulnerable as our ancestors were in the middle ages.
Plagues don’t get a foothold until you have groups of 5000 or more people living together. So one way people in the west could deal with a modern plague is to stay home and have no contact with strangers. You would work by telecommuting. You would have your goods and groceries delivered by drone.~ Roedy (1948-02-04 age:69)