CHAP 13 Parasitism

Symbionts

Organisms that live in a longterm, close associations with another species that can mutualistic , commensal, or parasitic

Mutualist

Organisms engaged in a symbiotic relationship where both species benefit

Parasites

Organisms that live on or inside a host and benefit by harming but not typically killing

Pathogens

DIsease causing microorganisms infecting a host causing illness

Hosts

Organisms that harbor symbionts or parasites, providing them with nutrients or shelter

Macroparasites

Large multicellular parasites that typically do not mulitply inside their host

Microparasites

Microscopic parasites that replicate inside the host

Parasitioids

Organisms that lay eggs inside or on a host and eventually the larvae kill the host

Ectoparasites

Parasites that live on the outside of the host body, benefiting in dispersal and safer from host immune system , but has more vulnerability

Endoparasites

Parasites that live inside the host body, benefiting from more protection from the environment, but dispersla is more difficult

To prevent the spread of a disease

Dl/Dt < 0 the disease will not spread

Reduce the density of susceptible individuals (S)

Increase the death and recovery rate (m)

Decrease the transmission rate (B)

Prevent disease spread complications

Latent period and veritcal transmission

Latent period

Time when an individual is infected but cannot spread the disease

Vertical Transmission

Disease is passed from mother to newborn