This includes the entire chapter of 4.1 Biology (OCR, A level from 2015 onwards) that I personally use for revision. Best coupled with past paper questions (you can find online for free). The information has been taken from lectures and has been rewritten in certain areas by my professors. Incredib...
4.1 Communicable diseases
What is a pathogen?
An organism that causes disease
Name four different types of pathogens
Bacteria, viruses, fungi and protoctista
What is a communicable disease?
A disease that can spread between organisms
Name the 2 animal and 1 plant diseases caused by bacteria
Tuberculosis, bacterial meningitis and ring rot
Name the 2 animal and 1 plant diseases caused by a virus
HIV, influenza and Tobacco mosaic virus
Name the 2 animal and 1 plant diseases caused by fungi
Athletes foot, ringworm and Black sigatoka
Name an animal and a plant disease caused by protoctista
Malaria and late blight
What is the difference between direct and indirect transmission?
Indirect transmission requires an intermediate to transmit one disease form one
organism to another. Direct transmission does not.
Give two examples of direct transmission and indirect transmission
Direct – droplet infection (coughing or sneezing tiny droplets of mucus or saliva
directly onto someone), Sexual intercourse.
Indirect - Intermediates include air, water, food or another organism (known as a
vector)
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