4.1.2: Transmission of pathogens

Question 1

what is the definition of disease transmission?

Answer 1

the transfer of pathogens form an infected host to an uninfected host

Question 2

wha types of transmission occurs between contact of individuals?

Answer 2

physical contact, close proximity, spores

Question 3

what are spores and how are they involved in the transmission of pathogens?

Answer 3

they are small reproductive structures that are released into the environment and dispersed by wind and water.
once they reach a host they grow and infect the host.

Question 4

how are HIV/AIDS transmitted?

Answer 4

as HIV is unable to survive outside of the body, it can only be spread via intimate human contact and the direct exchange of body fluids.

Question 5

how is tuberculosis transmitted?

Answer 5

when infected people cough or sneeze, the droplets enter an uninfected person when they inhale infecting them.

Question 6

how can transmission occur via a vector?

Answer 6

a vector is an organism that transfers a pathogen from an infected individual to an uninfected. Many vectors are insects

Question 7

how is malaria transmitted?

Answer 7

via an insect vector, or a blood transfusion

Question 8

what are some factors that affect disease transmission?

Answer 8

the presence of susceptible individuals, animals/plants that are resistant to some diseases

Question 9

what factors affect transmission?

Answer 9

the distance between individuals, farmers that use monocultures, weather + climate