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Flashcards in Pathogens and infection Deck (5)
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1
Q

what is an infectious disease

A

it is one that can be passed from one person to another.

2
Q

what is a pathogen

A

it is an organism that causes an infectious disease

3
Q

give 7 different ways in which pathogens are spread

A

a in water, including cholera bacterium
b by food, including Salmonella bacterium
c airborne (eg sneezing), including influenza virus
d by contact, including athlete’s foot fungus
e by body fluids, including HIV
f by animal vectors, including:
i housefly: dysentery bacterium
ii Anopheles mosquito: malarial protozoan

4
Q

give 3 example of physical barriers

A
  1. skin forms a protective barrier.
  2. mucus in breathing passages and lungs trap pathogens.
  3. cilia move mucus and trapped pathogens out of lungs.
5
Q

give 2 examples of chemical barriers

A
  1. hydrochloric acid in stomach kills pathogens in food and drink.
  2. lysozyme enzymes in tears kill pathogens and prevent them entering the eyes.