Parasitism (c) Transmission and Virulence Flashcards
Transmission is the…
Spread of a parasite to a host.
Virulence is the…
Harm caused to a host species by a parasite
Ectoparasites are generally transmitted through…
Direct contact or by consumption of intermediate hosts.
Endoparasites of the body tissues are often transmitted by…
Vectors
Factors that increase transmission rates are…
The overcrowding of hosts when they are at high density and mechanisms, such as vectors and waterborne dispersal stages that allow the parasite to spread even if infected hosts are incapacitated.
<infected>
</infected>
Host behaviour is often…
Exploited and modified by parasites to maximise transmission
The host behaviour becomes part of…
The extended phenotype of the parasite.
Parasites often suppress the host immune system and modify hist size and reproductive rate in ways that…
Benefit parasite growth, reproduction or transmission.
Alteration of host foraging, sexual behaviour, habitat choice or anti-predator behaviour
