Pathogens

Question 1

Different Types of transmissions of dieases

Answer 1

Contact > airborne droplets, sexual contact, direct contact
Droplet > muscat carrying disease are discharged into air (coughing, talking, food)
Vehicle > Food & waterborne, carried in blood.
Waterborne > poor sanitation, feral in water supply
Food > poorly stored/prepped (salmonella)
Blood > bodily builds are mixed
Vector > bites (mosquitoes, fleas, ticks, rodents)
Indirect > contaminated objects(money, toys, bedding)
Direct > physical contact between source and potential host (touching, kissing)

Question 2

Pathogens - infectious diseases
Causes of concern

Answer 2

• responsible for almost 50% of human mortality in developing countries,
• debilitating, causing an estimated 600 million illnesses/year
• patients need intensive/specialised medical care
• they also infect live stock & crops = food shortages

Question 3

Pathogens - Infectious diseases
Examples

Answer 3

non-cellular agents > viruses, prions
cellular agents > bacteria, fungi, parisites (endoparasites (inside) exoparisites (outside))

Question 4

Pathogens - portals of entry

Answer 4

Gastrointestinal tract (mouth)
Uriogenital opening (genitals)
Respiratory tract (nose)
breakage in skin surfaces (wounds)

Question 5

Pathogen definition

Answer 5

An infectons agent that causes diseases

Question 6

What do pathogens do once they enter the body

Answer 6

Cause illness to the host through toxin production and cell damage in replication.

Question 7

Bacteria - How do they cause infection?

Answer 7

Bacterial infections occur when bacteria enter your body. Once in your body they increase in number. This causes an immune reaction in your body.