|Antibiotic introduced in year||First resistant bacterial strain found in|
|Penicillin introduced in 1940||Penicillin-resistant staph – 1940|
|Tetracycline introduced in 1950||Tetracycline-resistant shigella 1959|
|Erythromycin introduced in 1953||Erythromycin-resistant strep – 1968|
|Methicillin introduced in 1960||Methicillin-resistant staph aureus (MRSA) – 1962|
|Levofloxacin – 1996||Resistant bacteria emerged in – 1996|
|Linezolid – 2000||Resistant bacteria emerged in – 2001|
|Daptomycin – 2003||Resistant bacteria emerged in – 2004|
As the above table shows, bacteria are able to develop resistance in a few years after the development of a new antibiotic.
Interestingly, bacteria including Staph Aureus have not been able to develop resistance to silver even though silver has been used for more than 2000 years to fight infection.