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Parasite Organisms

QuestionAnswer
incidental infect host "other than normal host"
definitive adult phase 7 sexual phase
Intermediate lavae phase & asexual phase
Vector arthropod carrier mode of transmission
ectoparasite surface of body
endoparasite within host
Parasite Classes Protozoa Nematodes Cestodes Trematodes
Protozoa spp. Amoeba Flagellates Ciliates Coccidian Sporozoa
Nematodes Roundworms
Cestodes Tapeworms
Trematodes Flukes
O & P exam Ova & Parasite exam visual- blood, mucus, adult worms wet direct- detect motile organisms permanent stain- trichrome; modified kinyoun concentration-detect small amounts in sample (flotation or sediment method) *(TAKE SIZE OF ORGS INTO ACCOUNT)*
Amoebae Entamoeba histolytica/ E. dispar Entamoeba coli (the other E. coli) Iodamoeba butchlii Dientamoeba fragilis***
Free-Living Amoebae Naegleria fowleri Acanthamoeba
Flagellates Giardia lamblia Trichomonas vaginalis Trichomonas hominis Chilomastix mesnili*** Leishmania Trypanosomes
Ciliates Balantidium coli
Sporozoans Plasmodium species Babesia species
Coccidia Cryptosporidium species Cyclospora cayetanensis Isospora belli
Microsporidia
Nematoda roundworms Necator americanus, Ancyclostoma duodenaie, Enterobius vermicularis, Trichuris trichura, Trichuris spiralis, Strongtloides stercoralis, Microflilarial worms- Wucheria & Brugia; Loa Loa
Platyhelminthes (flatworms) cestodes & trematodes
Cyst form inactive infection/carrier state found in formed stool
Trophozoite active disease loose, watery stool sensitive to environment
Ameoba motile via pseudopods usually acquired via ingestion cyst is ingested (histolytica/dispar, coli, hartmanni, I. butschii)
E/ histolyica causes dysentary & liver abscesses enter gi tract; cysts release trophozoites,; attach to colon epithelial cells; trophozoites mult. by binary fission
Created by: MLT179
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