Introduction to Endoparasites

what happens when co-evolution is longer

less damage to the host

what are the two types of endoparasite

protozoa

helminths

what are the three featuers of protozoa

single-celled

microscopic

motile

what is an example of parabasalia

trichomonas

what are the three vectorb-rne protozoa

plasmodium

babesia

theileria

what are the two types of platyhelminths

cestodes

trematodes

where do helminths normally multiply

not in mammals - this is teh egg development phase

which animals have the most parasites

horses and production species

which sub-class are all trematodes in

digenea

what happened to the gut of trematodes

blind ended so no anus and mouth is in and out

when are trematodes pathogenic

juveniles

cysts in organs, tissues, eyes, brain and muscle

what are the names of the segments

scolex with neck

proglottids

mature proglottid

gravid proglottid

what is an indirect lifecycle

two or more hosts are involved

example of direct lifecycle

sarcoptes scabiei

what are the technical words in trematodes

miracidium

cercariae

metacecariae

which are hermaphrodites

cestodes

trematodes

platyhelminths essentially

why are schistosomes different

the cercarie can directly penetrate the mammalian skin in transmission so no metacercariae or oral

what are teh two options for pathology

could be adaptive stragegy for transmission

could be a side effect - body response

what are the disease determinants

parasite density

host factors

parasite species and strain

what are the other host resistance factors

host immunosuppression

co-infection

nutritional status

give 3 ways of parasites cuasing disease

trauma

change cell growth patterns

divert host resources like nutrients in GI

toxins

immune response

vector

secondary infections

what is the phrase for the theory around parasites being good

hygiene hypothesis