12.3 Transmission Of Communicable Diseases

Question 1

State the methods of direct transmission of pathogens between animals.

Answer 1

Direct contact, inoculation, ingestion

Question 2

State the methods of indirect transmission of pathogens between animals.

Answer 2

-Fomites (inanimate object carrying pathogens)
-Droplet infection
-Vectors
-Water as a vector

Question 3

State the factors affecting rate of transmission of communicable diseases in animals

Answer 3

-Overcrowded living and working conditions
-Poor nutrition
-Compromised immune system
-Poor disposal of waste
-Climate change (new vectors and diseases)
-Culture and infrastructure
-Socioeconomic factors

Question 4

State the methods of direct transmission of pathogens between plants.

Answer 4

Direct contact

Question 5

State the methods of indirect transmission of pathogens between plants

Answer 5

-Soil contamination
-Vectors (wind, water, animals, humans)

Question 6

State the factors affecting rate of transmission of communicable diseases in plants.

Answer 6

-Planting varieties of crop susceptible to diseases
-Over-crowding
-Poor mineral nutrition
-Damp, warm conditions
-Climate change