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Parasit Vocab Exam1

Vocab terms from the first few lectures, fall 2012

QuestionAnswer
symbiotic living together
commensal parasite causes no harm/help; parasite derives benefit
mutualistic parasite & host benefit
parasitism parasite may cause harm to host (doesn't always cause disease)
host organism from which the parasite derives some or all of its needs
facultative host not necessary for parasite
obligate host parasite must have the host
definitive host where the adult/sexual stages of the parasite live
intermediate host where immature or asexual stages of parasite live
paratenic host a host in which immature stages are found but are not necessary for completion of the life cycle; way for parasite to get from 1 host to another
euryoxenous wide host range
monoxenous narrow host range
reservoir host host serves to perpetuate a parasite in the environment
incidental host not important to propogation of teh parasite
species population which is capable of inbreeding
primary divisions of classification of organisms kingdom, phylum, class, order, family, genus, species
economic parasitism level where the host may appear normal but is unable to gain weight, produce wool, hair milk, run faster than others, or any other factor which makes the host noncompetitive with its genetic equals; doesn't achieve its genetic potential
clinical parasitism rare but can be devastating; level of paraistism may be sufficient to cause overt disease or even death of the host
resistance ability to limit numbers of parasites
resilience ability to tolerate parasites
hypobiosis periods of time where parasite is within the host but not metabolically active
translation movement of parasites into the vegetation away from the fecal pat
incomplete metamorphosis hemimetabolous; true bugs, lice, mites, ticks; egg -> nymph (several stages) -> adult
complete metamorphosis holometabolous; fleas, flies; egg -> larva (several instars) -> pupa -> adult
mechanical vector transmits inefective organisms directly to a recipient host without any development or multiplication; transmission occurs usually within a short time span
biological vector infective organisms either undergo development or multiply (or both) within the vector before being transmitted to teh recipient host; usually blood feeders and transmission occurs after a prolonged time span
class insecta: distinguishing features 3 pairs of legs in adults; 3 body parts (head, thorax, abdomen); usually have 2 pairs of wings, 2 prominent eyes & a pair of antennae
class arachnida, order acarina: distinguishing features anterior gnathosoma (capitulum) and posterior idiosoma (sac-like body); no antennae; mouthparts consist of palps, chelicera, hypostome; eyes very simple if present
list the soft ticks we learned argas persicus, otobius megnini, ornithodorus spp
Created by: shelbell8389