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malaria,nemoodes EX4

QuestionAnswer
6 stages of plasmodium ring, developing troph, immature schizont, mature schizont, microgametocyte, macrogametocyte
Balantidium coli large, ciliated protozoan; infective-cyst; diagnostic-troph/cyst; bean-shaped macronucleus; cilia- on surface of troph; between walls on cyst
Balantidium coli reservoir pig
Balantidim coli lifecycle ingestion of contaminated food/water; excyst in sm. intestine; trophs to lg intestine to replicate by binary fission; encyst in lumen of lg. intestine to infective mature cyst passed in feces
Balantidiasis worldwide infection of Balantidium coli; asymptomatic - diahrrhea, dysentery, abdominal pain, weight loss
Isospora belli coccidial parasite - AIDS patients; oocyst -infectious/diagnostic; oval transparent, 4 sm. sporozoites surrounded by thick cell wall
specimen for Isospora belli and lab prep/stains fresh feces or duodenal contents from enterotest; direct wet prep; iodine prep; modified acid-fast stain
Isospora belli lifecycle ingestion of infective mature(sporulated) oocyst in contaminated food/water or oral-anal sexual contact; oocyst excysts in sm. intestine to sporozoites; asexual(schizogony) in cells of intestinal mucosa oocysts excreted on stool
Isosporiasis asymptomatic/symptomatic infection of Isospora belli; mild gastroenteritis to severe dysentery
Charcot-Leyhen crystals in Isospora belli -breakdown of eosinophils
Cryptosporidium parvum life-threatening in AIDS patients; oocyst -infectious; seen using iodine/modified acid-fast stain; asexual/sexual reproduction; infection from ingestion of contaminated food/water or person-person specimen-stool
Blastocystic hominis pathogenicity is questionable; vacuolated form -lg. central vacuole filled w/ fluid(90% of cell); 10% contains 2-4 nuclei saline lyse organism- use iodine prep
Toxoplasma gondii tissue protozoan oocyst -infectious 2 troph forms - tachyzoites/bradyzoites crosses placenta
Toxoplasma gondii lifecycle cat-definitive host; mice/rats-intermediate hosts; humans-accidential host; ingestion of infected cat feces (litter box); in human-tachyzoites from ingested cyst, tissue damage/initial infection -->to tissue/organs cysts filled w/ bradyzoites formed
Pneumocystis carinii affects lung tissue of AIDS patients; lifecycle is unknown; troph is mostly seen - ameboid w/ 1 nucleus; histology procedure- Gomori's silver stain - immunofluorecence
Babesia microti resembles plasmodium spp.; invade RBCs; only in ring form; rings-have sm. chromatin dot and scant amt. of cytoplasm
Babesia microti infectious stage,vector,host Sporozoites - infectious; vector-Ixodes scapularis tick; host-white footed mouse/rodent; accidental host-human
Ascaris lumbricoides "Roundworm of man"; creamy-white color,pink tint
Ascaris lumbricoides lifecycle ingestion of infective eggs; larvae from eggs in lg. intestine to blood stream; liver-lung migration; larvae coughed up, swallowed back to intestine; mature to adult worm in sm. intestine; exit via mouth, nose, anus
Necator americanus New World Hookworm; cutting plates
Ancylosotma duodenale Old World Hookworm; cutting teeth
Strongyloides stercoralis Threadworm; direct, indirect, autoinfection
Created by: cjbarnes78
 

 



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