Bacteria Resistance

Antibiotics are used to treat many diseases. Penicillin was one of the first antibiotics to treat many disease crippling bacteria. Staphylococcus aureus was the first bug to battle the medical miricale penicillin.

Resistance to antibiotics can form in several ways. Resistance can occur as a result of genetic events causing alterations in the pre-existing bacterial genome such as
point mutations and gene amplifications. The other major mechanism is horizontal gene transfer between bacteria both within and between species, where transposons, integrons or
plasmids are introduced into an organism.

Here is a link that describes and shows how Bacteria can become antibiotic resistant.
http://www.dhf.uu.se/antibiotics_participant/new_pdf/Bacteria.pdf

Introduction

Antibiotic resistance is the abilty of a microorganism to withstand the effects of antibiotics. One of the first antibiotic resistant bugs was Staphylococcus. Scientists are dismayed to discover that some bacteria have become resistant to antibiotics through various alterations, or mutations, in their DNA. Hospitals have become a major breeding ground for antibiotic resistant bacteria. These bacteria muiltiply in an environment full of sick people who have poor immune systems and where antibiotics have eliminated competing bacteria that are not resistant.