term | Definition |
parasitology | sutdy of organisms which are metabolically dependent on other species |
parasite | organism that lives within, upon, at the expense of other organism |
pseudoparasite | false, dust pollen etc. |
spurious parasite | infects a host that is not its normal host (accidental) |
host | organism parasite obtains nourishment |
intermdediate host | undergoes a stage in its devel but does not reach sex maturity |
bilogical vector | body the parasit devel or multiplies in before becoming infective |
mechanical vector | temporary host, transports, does ot develop |
helminth | organism belonging to the Phyla Platyhelminthes, acanthocephala, nemathelminthes, annelida (may be freeliving or parasitic) |
phyla Platyhelminthes | flatworms |
acanthocephalia | spiny headed worms |
nemathelminthes | threadworms, roundworms |
annelida | segmented worms |
anthelminthic, anthelmintic | agent that destroys parsisitic intestinal worms |
prepatent period | devel stage in an infection before agent shows prescence |
patent period | open period, stage where agent produces evidence of prescence |
acariasis, acarinosis, acaridiasis | disease caused by mites |
ascariasis | disease caused by ascarid |
ascarid | mites and ticks |
myiasis | disease caused by an infestaion of maggots (fly larvae) |
McMaster Tech | quantitative tech for cntg parsite eggs in ruminant feces, floatation of cnctrtd salt |
Baermann Tech | lab method for separating parasite larvae from feces, soil or plant growth |
Ext Paras - Fleas desc | 1500 known species, ctenocephalides felis, ctenocephalides canis. have preferred host but alternate, laterally flattened, enlarged 3rd leg |
Fleas cycle | flea -- egg -- larvae -- papae -- adult dev off host, cocoon, emerge 5 days to 4 wks later |
Fleas Dx | visual sighting, dirt, eggs and larvae; pruritis |
Fleas Tx | adulticides; Advantage, Advantix, Frontline, revolution, capstar--IGR's lufenuron |
Ext paras - Bot Flies | Bot flies; Gasterophilus sp. horses, eggs can be seen attached to hairs |
bot flies - cycle | eggs attached to haris - hatch, larvae crawl to mouth and are swalloed, buorrow into mucosa, attach to stomach wall, thur feces where they becom adult |
bot flies Dx | lesions of the lip nose or stomach, oral/gastic ulceration |
bot flies Tx | remove from hair, Ivermectin |
ectoparasite | living on the surface of the host's body |
endoparasite | lives within the host's body |
transplacental | penetration of the placenta by an organism, toxin, or chemcial that could affect a fetus |
prenatal | before birth |
transmammary | trans of organism, toxin, or chemical from mother to young via milk |
proglottid | one segment making up the body of the tapeworm |
scolex | attachement organ of a tapeworm, located at the anterior end |
hydatid cyst | formed in tissues resulting from the dev of certain tapeworms, may grow to enourmous size |
microfilaria | larva of worms in the superfamil Filariodea, found in bld or tissues of animcal infected with adult worms |
trophozoite | acivte motile feeding stage of flagellate protozoa such as Giardia spp. |
oocyst | resistant stage of the life cycle of coccidial parasites, can survive long periods, can mature and become infective |