Unit 4 Review

An event in which a disease spreads to many

    regions of the world is called _______.

• an epidemic

• an outbreak

• a pandemic

• a pathogen

A mosquito that transmits malaria from one 

    person to another is _______.

• bacterium

• a parasite

• an infection

• a vector

Which of the following can reduce the spread of infectious diseases?

• taking medicine

• wearing clean clothes

• preventing transmission between people

• cleaning your teeth daily

Why do doctors suggest that people get a flu

    vaccine each year?

• Viruses replicate more rapidly over time.

• Viruses can mutate from year to year.

• Vaccines are absorbed by the body after a year.

• Vaccines get stronger over time.

Bacteria, viruses and parasites are similar in this way ______.

• They are all prokaryotes

• They all require a host to cause disease

• They are all eukaryotes

• They are all microorganisms

What is the main difference between a pandemic and 

     an epidemic?

• Epidemic affect people around the world while pandemic 

       affect people in a small area.

• Epidemic affect people in the same area while pandemic 

       affect people in smaller areas.

• Epidemic and pandemic are the same.

• Epidemic affect people in a small area while pandemic 

       affect people around the world.

Which is the best way to help prevent the flu

    from becoming pandemic?

• getting a vaccination

• taking antibiotics

•  eating fruits and vegetables

• washing hands often

Which of these diseases can be treated with

    antibiotics?

• lyme disease

• the common cold

• influenza

• AIDS

Which type of pathogen causes athlete’s

    foot?

• bacterium

• insect

• fungus

• virus

Which of the following reproduces by 

      injecting its material into a host cell?

• parasite

•  virus

•  bacterium

• microorganisms