Bacterial and viral diseases in humans: TB, cholera, Helicobacter and Ebola | 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 microorganism that causes disease. ✓

virus

⇔

An infectious agent. ✓

bacteria

⇔

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

plants

viruses ✓

protists ✓

fungi ✓
Which option best defines what a vaccination is?

An injection.

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

A substance you take when you are ill. ✓

An antibiotic that can stimulate the body's immune response against a virus.

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

'toxins' ✓
Which disease is caused by a virus?

cholera

ebola ✓

stomach ulcer

tuberculosis (TB)
Which disease is there not a vaccine for?

ebola

tuberculosis (TB)

cholera

stomach ulcer ✓
Match the disease to how its primary mode of transmission.

ebola

⇔

Contaminated body fluids. ✓

cholera

⇔

Contaminated food and water. ✓

tuberculosis (TB)

⇔

Mucus droplets from coughing. ✓
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 TB?

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 produce toxins that damage living tissue and cause disease.
Cholera, TB and Helicobacter stomach ulcers as example; how they are spread, and how the spread can be reduced.
Viruses invade cells to reproduce where they cause damage to cells.
Ebola as an example of a viral disease; how it is spread, and how the spread can be reduced.

Pupils may believe that viruses are alive.

Viruses are not cells. They do not carry out many of the processes of living organisms such as replication and respiration.

Bacteria - single celled prokaryotes
Pathogen - a microorganism that causes disease
Communicable disease - a disease that can be spread from one organism to another
Toxin - a poison made by bacteria
Virus - an infectious agent