Lesson Worksheet: Spread of Pathogens Biology

In this worksheet, we will practice recalling the different routes by which pathogens are spread and suggesting methods that could prevent their spread.


Which of the following is not a way that pathogens can be spread?

  • AThrough email and internet communications
  • BThrough consuming contaminated water (waterborne)
  • CThrough direct contact with contaminated surfaces
  • DThrough the air (airborne)
  • EThrough exchange of bodily fluids


How can the spread of diseases like HIV and gonorrhea be prevented?

  • ABy sterilizing drinking water
  • BBy using insect repellent and mosquito nets
  • CBy washing food before preparing it
  • DBy using condoms during sexual intercourse
  • EBy coughing or sneezing into a tissue


Chalara ash dieback and powdery mildew are examples of plant diseases caused by fungi. How could the spread of these diseases be prevented?

  • ABy planting more plants in an area affected by these diseases
  • BBy spraying plants with fungicide
  • CBy encouraging infected plants to reproduce
  • DBy spraying plants with insecticide
  • EBy leaving the plants to fight off the infection


Ebola is a very virulent disease caused by a pathogen carried in bodily fluids. The pathogen enters the body through breaks in the skin or through mucous membranes in the eyes and mouth.

What type of pathogen causes Ebola?

  • AFungi
  • BBacteria
  • CVirus
  • DProtist

What method of transmission does the Ebola pathogen use?

  • AVector transmission
  • BWaterborne transmission
  • CDirect transmission
  • DAirborne transmission


Which of the following is not a good example of practicing good hygiene?

  • AUsing the same chopping boards for raw meat and vegetables
  • BWashing hands after using the toilet
  • CUsing disinfectants on surfaces in the kitchen and bathroom
  • DSneezing or coughing into a tissue rather than hands
  • EWashing hands when preparing food


Colds and flu are spread by coughing and sneezing.

What type of transmission is this?

  • AAirborne transmission
  • BDirect contact transmission
  • CVector transmission
  • DWaterborne transmission

How could the spread of flu and colds be prevented?

  • ASterilizing water sources
  • BPracticing good hygiene
  • CDestroying vectors
  • DWashing contaminated food


The beet curly top virus (BCTV) is carried and spread by insects. How could the spread of BCTV be prevented?

  • ABy washing the plants with soap and water
  • BBy using insecticides on crops
  • CBy sterilizing water sources
  • DBy planting more crops within an area affected by BCTV
  • EBy spraying plants with a fungicide


By what method of transmission is malaria spread?

  • AContaminated food
  • BVector transmission
  • CAirborne transmission
  • DWaterborne transmission
  • EContaminated water


Which of the following would not be an effective way of preventing the spread of a disease?

  • AIsolating individuals that are infected with the disease
  • BHaving poor sanitation systems in crowded areas
  • CVaccinating children and those vulnerable to the disease
  • DEnsuring that people practice good hygiene
  • EDestroying vectors that may carry the disease


By what method of transmission is the measles virus primarily spread?

  • ADirect contact
  • BAirborne transmission
  • CExchange of bodily fluids
  • DContaminated food
  • EWaterborne transmission

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