Parasitism and Infectious Diseases
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9 Terms
What are some examples of ectoparasites?
Ticks
Mites
Lice
Flea
Nematode
What are some examples of endoparasites?
Viruses
Prions
Protozoans
Bacteria
Fungi
Helminths
When do emerging infectious diseases often occur?
When a mutation allows a pathogen to jump to a new host species
What are some factors that influence the probability of host infection?
Mechanism of transmission
Mode of entering the host
Ability of parasite to jump between species
Existence of reservoir species
Counterattacks to host’s immune system
What are two types of parasite transmission?
Horizontal
Vertical
What can cause changes in parasite and host populations?
Changes in proportion of host infection resistance and tolerance
What can be used to control infection resistance?
Vaccinations
What happens if the reproductive ratio is greater than 1?
The infection will spread
What happens if the reproductive ratio is less than 1?
The infection fails to spread