1.25-26. Pathogens And Infections

Question 1

Name the 4 types of pathogens.

Answer 1

1. Bacteria-TB and cholera
2. Viruses (disease)- influenza, mumps, AIDS
3. Fungi- athletes foot, fungus
4. Protoctist- protozoan causes malaria.

Question 2

What are vectors?

Answer 2

Larger organisms(insects) that carry and spread pathogens.

Eg. Mosquitoes can pass pathogens into blood.
Houseflies can carry bacteria from faeces to food.

Question 3

What are pathogens?

Answer 3

Microorganism that cause infectious diseases passed from one infected person to a non-infected person.

Question 4

What are antiseptics?

Answer 4

They are chemical substances that kill microorganisms outside the body and help prevent pathogens from getting into open wound.

Question 5

What are antibiotics?

Answer 5

Chemical substances that kill/prevent the growth of bacteria and fungi but not human cells.
They don’t kill viruses.

Question 6

How does bacteria form resistance from antibiotics?

Answer 6

Once antibiotics are used, susceptible bacteria are killed leaving only the resistant bacteria.
The resistant bacteria survive and reproduce, producing a new colony of resistant bacteria.

Question 7

What is MRSA?

Answer 7

A bacterium that is resistant to many antibiotics.

Question 8

True or false:

Antibiotics kills only the bad bacteria.

Answer 8

False,

False antibiotics kills many bacteria, meaning resistant bacteria of all type will be left behind