Antibiotic resistant bacteria lesson created in accordance to the NEW AQA Specification (9-1). Designed for higher ability class, although content can be adjusted to suit any ability. Includes: embedded videos and timers, slide animations, practice questions with answers on slides, worksheet and an interactive quiz. NB: If you are unable to play videos a URL link can be found in the slide notes.
AQA spec link: 184.108.40.206
Relevant chapter: B15 Genetics and evolution. AQA Biology Third edition textbook-Page 248-249
Students are required to know the following;
Bacteria can evolve rapidly because they reproduce at a fast rate.
Mutations of bacterial pathogens produce new strains. Some strains might be resistant to antibiotics, and so are not killed. They survive and reproduce, so the population of the resistant strain rises. The resistant strain will then spread because people are not immune to it and there is
no effective treatment.
MRSA is resistant to antibiotics.
To reduce the rate of development of antibiotic resistant strains:
• doctors should not prescribe antibiotics inappropriately, such as
treating non-serious or viral infections
• patients should complete their course of antibiotics so all bacteria are
killed and none survive to mutate and form resistant strains
•the agricultural use of antibiotics should be restricted.
The development of new antibiotics is costly and slow. It is unlikely to keep up with the emergence of new resistant strains.