問題一覧
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Medical Parasitology is the study of
parasites of man and their medical consequences
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Parasite
Living organism requiring intimate prolonged contact with another living organism to meet some of its basic nutritional needs
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Host
organism harboring a parasite
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Definitive host
animal harboring the adult or sexually mature stage of the parasite
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Intermidiate host
animal in which development occurs but in which adulthood is not reached
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Life cycle
sequence of morphologic and environmental stages
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Parasitic infection
invasion by endoparasites (Protozoa and helminths)
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Parasitic disease
invasion and pathology by endoparasites
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Parasitic infestation
external parasitism by ectoparasites
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Commensalism
the association of two different organism in which one is benefited and the other is neither benefited nor harmed
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Reservoir host
an animal that harbours a species of parasites that can be transmitted to and infect man
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Vector
an arthropod or other living carrier that transports a pathogenic organism from an infected to a non infected host
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Carrier
a host that harbours a parasite but exhibits no clinical signs of symptoms
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Zoonosis
a disease involving a parasite for which the normal host is an animal and wherein man can also be infected
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Amoeboid protozoans
move by means of pseudopodia
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Flagellated protozoans
move by means of flagella
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Ciliated protozoans
move by means of cilia
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Parasitic protozoans
breaks down and absorb nutrients from the body of the host in which they live
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Pathogens
causative agent of malaria, giardiasis, amebic dysentery
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Mutualistic symbiotic
Protozoa digest the wood eaten by the termite, enabling both organism to absorb the nutrients necessarry for life
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The only entamoeba that can invade the intestinal mucosa with or withour causing clinical symptoms
Entamoeba histolytica
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A condition relating only to Entamoeba histolytica
Amoebiasis
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Primary amoebic meningoencephalitis
Naegleria fowleri
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Granumatous amebic meningoencephalitis
Acanthamoeba culbertsoni
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Largest protozoan parasite
Balantidium coli
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Acute Malaria
cerebral, hemolysis, shock, uremia
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Chronic Malaria
Anemia, Nephrosis, Hypertonic malarial splenomegaly
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Incubation period of Plasmodium falciparum
8-42 days
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Incubation period of Plasmodium vivax
5 days to years
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Infective stage of malarial parasites
sporozoites
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Morphologically distinctive sexual form of the parasite which develops from some trophozoites in RBC
Gametocyte
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Morphological form which develops in the mosquito salivary gland
Sporozoite
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Asexual reproduction within hepatocytes producing schizonts, which break out of the hepatocytes and invade other hepatocyte
Exoerythrocytic cycle
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Asexual reproduction within RBC
Intraerythrocytic cycle
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The only species found in the urogenital tract
Trichomonas vaginalis