Types of pathogens

Question 1

Disease definition

Answer 1

Any process or function that adversely affects the normal functioning of a living thing or parts of a living thing

Question 2

Infectious disease definition

Answer 2

Caused by another organism or infective agent called a pathogen

Question 3

Non infectious disease definition

Answer 3

Caused by genetic, environmental influences or cellular malfunction

Question 4

Bacteria

Answer 4

• Unicellular, prokaryotic organisms
• Secrete toxins, invade cells, disrupt cell function
• Binary fission reproduction

Plant: Crown gall
Animal: Tuberculosis

Question 5

Fungi

Answer 5

• Eukaryotic, non-photosynthetic organism with cell walls
• Reproduces by spreading pores

Plant: Myrtle rust
Animal: Tinea (athletes foot)

Question 6

Maco-parasite

Answer 6

• Visible without microscope
• Ecto/endoparasite lives in/on an organism
• Invades and destroys cells and creates competition for nutrients

Plant: Nematodes –> roots of orchard trees
Animal: Tape worm

Question 7

Protozoan

Answer 7

• Unicellular, heterotrophic, eukaryotic organism

Plant: Wilt disease (oil palms)
Animal: Malaria

Question 8

Virus

Answer 8

• Non-cellular
• Nucleic acid w/ protein coat
• Replicates in host’s living cells

Pant:
Animal: Influenza