Cambridge IGCSETM
Biology 0610
15 Drugs
Drugs and antibiotics

Drugs – is a substance that affects
metabolic reactions in the body. Drugs
that help us to stay healthy are called
medicinal drugs.

Antibiotics – medicinal drugs that kills
bacteria in the body, without harming our
own cells. Antibiotics do not, however,
affect viruses.
How antibiotics work
How Penicillin works
Antibiotic resistance
MRSA – Methicillin-resistant Staphylococcus aureus

MRSA is resistant to all beta-lactam antibiotics,
including penicillins (like amoxicillin)
and cephalosporins (like cephalexin and oxacillin)
, which are commonly used to
treat Staphylococcus aureus infections
Beta-Lactams
https://www.youtube.com/watch?v=qBdYnRhdWcQ
Antibiotic resistance and natural selection
Consequences of antibiotic resistance

Antibiotic resistance has severe
consequences, leading to harder-totreat, longer, and more deadly
infections, increased healthcare
costs, and greater risk for routine
medical procedures like surgeries and
organ transplants.
Reducing the impact of antibiotic
resistance
Questions
Past Paper
Past Paper
Past Paper
Past Paper