CAIE Biology Notes — Topic 10: Infectious Diseases | Pathogens, Transmission, Prevention

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CAIE Biology Notes — Topic 10: Infectious Diseases | Pathogens, Transmission, Prevention

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Covers TB, HIV, malaria, cholera, and mode of transmission with easy diagrams and exam definitions.

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Cambridge (CIE) AS Biology Your notes

Infectious Diseases
Contents
Infectious Diseases
Transmission of Disease
Prevention & Control of Disease

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, Infectious Diseases
Your notes
Infectious Diseases
A disease is an illness or disorder of the body or mind that leads to poor health
Infectious diseases are caused by pathogens and are transmissible, meaning that they
can be spread between individuals within a population

Term Definition Example

Infectious, or Diseases caused by pathogens that can be Cholera
communicable, transmitted from infected to uninfected
disease people. Tuberculosis
(TB)
Some can transmit from animals to people,
or people to animals Malaria
HIV/AIDS

Non-infectious Diseases that are not caused by Lung cancer
disease pathogens, but that may instead be
inherited, or related to lifestyle factors or Sickle cell
life events disease
Depression
Coronary heart
disease

Common Pathogens & Their Diseases
Examples of infectious diseases of worldwide importance are
Cholera
Malaria
Tuberculosis (TB)
HIV/ AIDS
The number of people infected with these diseases across the world remains very high,
and they pose serious public health problems
These diseases are all caused by pathogens; understanding the pathogen and its
method of transmission are important in reducing the spread of disease

Disease Pathogen Type of
organism

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Connected book

Mary Jones, Richard Fosbery Cambridge International AS and A Level Biology Coursebook with CD-ROM

Publisher: augustus 2014 ISBN: 9781107636828 Edition: 4

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Study Level: A/AS Level
Subject: Biology
Uploaded on: November 24, 2025
Number of pages: 11
Written in: 2025/2026
Type: Class notes
Professor(s): Self-study (private candidate)
Contains: All classes

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