Parasitology 350: Terms

characteristic of host, but in unusual location within host

one that is found in a host other than it's normal host (aka incidental parasite)

establishes a relationship with host if opportunity presents itself

one that is physiologically and metabolically dependent on the host

lives on the outer surface of host

lives inside its host

lives entire adult life within/on host

contacts its host only to feed then leaves

one in which parasite reaches sexual maturity, or most important host if no sexual reproduction

one in which some development or aesexual reproduction occurs, no sexual maturity

Host which parasite enters but does not undergo development or reproduction, remains infective to host

"living source" of parasite, not primary host

Intermediate host that actively transmits the disease organism (often time arthropods)

lives in cavities of the host (i.e. peritoneal cavity, lumen of gut, blood vessels)

intracellular parasite, lives within host cell

lives in the tissues of host, but not within cells

one host cycle (=monoxenous parasite), aka 'hand-to-mouth' cycle

one requiring two or more hosts (=heteroxenous parasite)

the parasite undergoes cyclical changes within the vector but does not multiply (developmental changes but no multiplication)

the parasite undergoes cyclical changes and multiplies within the vector (developmental chance and multiplication)

parasite multiplies within the vector but does not undergo developmental changes

'flying syringe', transmission from one host to another is accomplished by contamination of mouthparts of an arthropod, is physically carried

disease pathogen is present in an area and is expected to be there

presence of disease is at levels higher than what is normally expected

'as it falls upon the people', the ecology of disease, study of transmission and impact

worldwide epidemic

number of new cases of infection in a given time period divided by number of uninfected/susceptible hosts at beginning of the time period

number of parasites in a given host

total number of parasites recovered (over multiple hosts) divided by number of infected hosts

number of parasites per unit area, weight, volume of tissue

A general rule in which a few hosts harbor the majority of the parasites in a population

number of infected hosts, divided by the number of hosts examined at a point in time

in contrast to an overdispersion, this is a population in which all hosts have a similar number of parasites

One organism eats the second

'Hitching a ride'

Classic symbiosis, both benefit

'Mutually assured destruction' both species are destroyed

One is impeded/killed, and other doesn't care

Neither species benefit/are hurt

One benefits, other isn't hurt

One benefits and the other is hurt

Commensalism and Parasitism can be a blurry line

• -Rob nutrients-Eat host tissue
• -Secrete toxic waste products
• -Mechanical damage
• -Autoimmune response damage
• -Some combination of the above