Parasitology Flashcards
A parasite that cannot live apart from its host
Obligatory parasite:
An organism capable of living an independent or a parasitic existence; not an obligatory parasite, but potentially parasitic.
Facultative parasite
Usually a free-living organism that can become parasitic if it is accidentally ingested or enters a wound or other body opening.
Facultative parasite
The presence of parasites in the blood (e.g., malaria schizonts in red blood cells).
Parasitemia
A parasite established on the body of its host.
Ectoparasite
The association of two different species of organisms in which the smaller species lives on or within the other and has a metabolic dependence on the larger host species.
Parasitism
The animal in which a parasite passes its larval stage or asexual reproduction phase.
Intermediate host
: Infection of a host other than the normal host species
Accidental (or incidental) host
A parasite may or may not continue full development in an accidental host
The animal in which a parasite passes its adult existence, sexual reproductive phase, or both.
Definitive host
: An animal that harbors a species of parasite that is also parasitic for humans and from which a human may become infected.
Reservoir host
that harbors a parasite that does not reproduce but merely goes on to infect a new host.
Transport host
A host harboring a parasite but exhibiting no clinical signs or symptoms.
Carrier
The association of two different species of organisms in which one partner is benefited and the other is neither benefited nor injured.
Commensalism
unicellular eukaryotic microorganisms.
Protozoal parasites
Three types of protozoal parasites based on locomotion
-Phylum Sarcomastigophora: Locomotion by pseudopodia or flagella
- Phylum Ciliophora: Locomotion by cilia
-Phylum Apicomplexa: Apical complex can be seen with an electron microscope, reproduction is both sexual and asexual
Locomotion by pseudopodia or flagella
Phylum Sarcomastigophora
Locomotion by cilia
Phylum Ciliophora
Apical complex can be seen with an electron microscope, reproduction is both sexual and asexual
. Phylum Apicomplexa
wormlike invertebrates
Metazoan (helminths) parasites
Two types of Metazoan (helminths) parasites
-Phylum Nemathelminthes: Nematoda: roundworms
- Phylum Platyhelminthes: flatworms
Nematoda: roundworms
Phylum Nemathelminthes
flatworms
Phylum Platyhelminthes
two types of Phylum Platyhelminthes: flatworms
-Cestodes
-Trematodes
body flattened and segmented
Cestodes (tapeworms
flukes -body flattened, leaf-shaped, and nonsegmented)
Trematodes