Infectious Agents
abnormally shaped versions of your own proteins
prions
proteins released by bacteria
exotoxins
single celled organisms (malaria)
parasite
occurs when bacteria or viruses travel on a sneeze or a cough
Droplet Transmission
similar action to that which occurs with droplet transmission but with smaller particles
airborne
•protein coat surrounding nucleic acid core
•have no metabolic enzymes of their own
viruses
toxins that are part of the bacterial cell wall
endotoxins
large, multicellular worms
Helminths
mechanism of transmission of gastroenteritis, enteric fevers and viral hepatitis
fecal-oral route
cells without membrane-bound organelles (prokaryotes)
bacteria
smaller than bacteria, lack a cell wall (rickettsiae, chlamydiae)
mycoplasma
live on the host
Arthropods (Ectoparasites)
skin-to-skin contact, kissing, and sexual intercourse
direct contact
eukaryotic organisms (yeast, mould)
fungi
Mechanism of transmission of Salmonella typhi bacteria (Typhoid fever)
water transmission
Transmission by the bite of a sucking arthropod
inoculation