Hypobiosis/Arrested Development
Arrested or inhibited larval development; a temporary cessation in nematode larval
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Autoinfection
Reinfection by the progeny of a parasite while they are still within the body of the host
Facultative Parasites
Can be free living or parasitic
Obligate Parasites
Must have a host
Premunition
Resistance of a host to superinfection which persists only so long as the parasites which provoke it survive and are present in the host. It is resistance conferred by an existing infection, and may be complete or partial resistance.
AIDs and Parasite Infections
High prevalence of certain opportunistic parasites among HIV positives reduced immune response caused by an HIV infection.
Definitive Host
The host in which the sexual reproduction of a parasite takes place
Intermediate Host
Host where some development occurs but sexual maturity cannot be reached
Paratenic Host
A host that serves as a transport host in which the parasitic forms undergo no development, but passes on to the final host
Ancylostoma caninum definitive host
Dogs, wolves, coyotes, foxes
Ancylostoma caninum intermediate hosts
Aberrant Host: Humans
Paratenic Hosts: Rodents
Ancylostoma caninum geographic location
Northern Hemisphere
Warm, wet, tropical climates
Ancylostoma caninum method of infection
Larvae enter through skin
cutaneous larval migrans/creeping eruption occurs and causes infection if cannot complete migration
Dogs pick up L3 from contaminated ground
Eggs found in feces
Ancylostoma braziliense definitive host
Dogs and Cats
Ancylostoma caninum diagnosis/treatment
Diagnosis: eggs in stool
Treatment: monthly doses of combination pyrantel, febantel and moxidectin
Ancylostoma braziliense geographic location
SE United States, Latin America, South America, and Africa
Warm, wet, temperate climates
Ancylostoma braziliense method of infection
Larvae found in the ground
penetrate skin of animals and humans.
Ancylostoma braziliense diagnosis/treatment
Diagnosis: eggs found in feces
Treatment: one dose of ivermectin or repeated treatments of albendazole
Ancylostoma braziliense intermediate hosts
Eggs exit animal in feces
Mature into larvae in dirt
Humans Aberrant host
Ancylostoma duodenale definitive host
Humans [Show Less]