parasitology Flashcards
parasite
causes harm and reaps benefit
definitive host
parasite goes through it’s sexual cycle within or upon
ex: Haemonchus contortus (goat)
intermediate host
parasite replicates but doesn’t go thru sexual cycle
Sarcocystis neurona (intermediate in raccoon) (EPM)
reservoir host
where parasite resides when it isn’t affecting a population (ex rabies)
dead end host
parasite is unable to replicate and dies inside
biological vector
something that carries a parasite to a host and it lives part of its life cycle there
mechanical vector
transported w/o going through a whole stage
explain life cycle of wurm
- egg
- larvae
optional 3. cyst - adult
hypobiosis
worms in developmental arrest
monoecious/hermaphroditic
two sexes in one body
dioecious
two sexes are separate
endoparasite
parasite that lies inside a body
explain the types of helminths
nematodes: roundworms, hookworms, strongyles
cestodes: tapeworms
trematodes: flatworms, flukes
what are helminths
lack digestive system
limited movement
complex reproductive system
reduced nervous system
ectoparasite
parasite that resides on top of a body
examples of ectoparasites
- flies, fleas, lice (insects)
- ticks, mites (arachnids)
management strategies
deworming (anthelminthics)
- don’t use the same one a lot
- don’t underdose (use weight to correctly dose)
- parasites have built up resistance to all dewormers to a point
name of nonresistant population of microbe
refugia
how to combat AR
use fecal egg counts
cross species grazing
manure removal and compost
NOT dragging fields
combining anthelminthics
introduce new animals and new refugia
