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An infection is the invasion and multiplication of pathogenic microbes in an individual or population. How does the immune system work?
Gastrointestinal tract mouth oral cavity e. Immune system An infection can be seen as a battle between the invading pathogens and host.
Vibrio cholerae which causes cholera. There is also strong evidence that microbes may contribute to many non—infectious chronic diseases such as some forms of cancer and coronary heart disease.
Pathogens cross protective barriers to colonize the host
Microbes can enter the body through the four sites listed below: Respiratory tract mouth and nose e. To cause an infection, microbes must enter our bodies. Microbes cause infectious diseases such as flu and measles. Different diseases are caused by different types of micro-organisms.
Major disease-causing parasites
The site at which they enter is known as the portal of entry. Microbes and the human body Microbes and disease. Breaks in the skin surface e. Routes of transmission Find out how you can pick up germs and pass them on to others. An infection can be seen as a battle between the invading pathogens and host.
An infection does not always result in disease! Clostridium tetani which causes tetanus. Antibiotics Antibiotics are powerful medicines that only fight bacterial infections. Microbes that cause disease are called pathogens. Urogenital tract e.
Home Why Microbiology Matters What is microbiology? Escherichia coli which causes cystitis.
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