Bacterial and viral diseases in humans: Salmonella and measles | Biology

Starter quiz

Match the type of disease to its description.

Communicable

⇔

Can be passed from person to person. ✓

Non-communicable

⇔

Cannot be spread from person. ✓
Which diseases are non-communicable?

Cancer ✓

Measles

COVID-19

Heart disease ✓

Flu
Which picture shows a bacterium?

A

B

C ✓
Match the word to its definition.

Pathogen

⇔

A micro-organism that causes disease. ✓

Virus

⇔

An infectious agent. ✓

Bacteria

⇔

A single cell prokaryote. ✓
Which of the following can be pathogens?

Plants

Viruses ✓

Protists ✓

Fungi ✓

Bacteria ✓
What is a vaccination?

An injection.

A substance used to stimulate the body's immune response against disease. ✓

A substance you take when you are ill.

True or false? Pathogens are microorganisms that cause disease.

True ✓

False
Pathogenic bacteria can produce ______ that damage living tissue and cause disease.

'toxins' ✓
Match the disease to how it is spread.

Measles

⇔

is spread by coughing and sneezing through mucus droplets. ✓

Salmonella

⇔

is spread by consuming contaminated food and water. ✓
What are the symptoms of salmonella?

high temperature ✓

diarrhea ✓

shortness of breath

vomiting ✓

stomach cramps ✓
Put the steps in order to show how a virus replicates using a host cell.

1

⇔

Virus enters the host cell.

2

⇔

The cell replicates the virus.

3

⇔

Virus bursts out of the cell causing damage to the host.
What is the best way to stop the spread of measles?

Hand washing

Vaccination ✓

Staying indoors

Eating a healthy diet

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Some but not all bacteria are pathogens that can cause communicable diseases in humans.
Pathogenic bacteria can produce toxins that damage living tissue and cause disease.
Salmonella food poisoning as an example of a bacterial disease, how it is spread, and how the spread can be reduced.
Viruses invade cells to reproduce where they cause damage to cells.
Measles as an example of a viral disease, how it is spread, and how the spread can be reduced.

Pupils may think that viruses are alive.

Viruses do not carry out many of the life processes required for living organisms such as respiration and reproduction.

Pathogen - A pathogen is a microorganism that causes disease.
Virus - A virus is an infectious agent.
Bacteria - Bacteria is a single celled prokaryote.
Communicable disease - A communicable disease is a disease that can be spread from one organism to another.
Toxin - A toxin is a poison made by bacteria.