Medication and Drugs
Antibiotics
Penicillin

What bacteria does penicillin kill?

Answer

Wiki User
07/29/2014

Penicillins, having been around so long, have undergone significant modifications, and their spectra has increased since its discovery (when it wasn't effective against Gram negative bacteria -- which has changed).

Some of the bacteria penicillins of today may successfully attack include:Staphylococcus Streptococcus Gonorrhea Meningitis Endocarditis Upper respiratory infections Periodontal infections Syphilis and others...

Penicillin is ineffective against mold/fungus and MRSA (Methicillin Resistant Staphylococcus aureus). Other bacteria have also developed resistances.