Term
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Definition
| amoeba with central karyosome or cyst with 1-4 nuclei |
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Term
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Definition
| toxin eroding LARGE INTESTINE making flask shaped lesions |
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Term
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Definition
| GI symptoms, hepatitis, brain abscess, conjunctivitis, or skin sores |
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Term
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Definition
low virulence, no cysts, lives in CECUM, COLON, APPENDIX
direct contact with infected feces |
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Term
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Definition
| Amoeba stage carried in the eggs of ENTEROBIUS VERMICULARIS |
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Term
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Definition
| pseudopodia irritate large intestine leading to loose, mucous stools. |
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Term
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Definition
| preference for erythrocytes, appendix fibrosis |
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Term
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Definition
| low virulence, anaerobic amoeba in LARGE INTESTINE |
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Term
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Definition
| accidental human infection. ubiquitous in air, soil and water |
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Term
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Definition
| enter damaged tissue of the eye, lungs, skin, uterus following exposure to soil, pools, hot tubs, contact solution |
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Term
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Definition
| collagenase and proteolytic enzymes; ring around the eye from stromal infiltrate |
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Term
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Definition
| antibody dependent cellular rxn |
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Term
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Definition
uveitis, optic neuritis, corneal keratitis
granulomatous amoebic encephalitis
acanthamoeba skin lesions |
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Term
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Definition
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Term
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Definition
round, 2 nuclei
swell + brownian movement in water |
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Term
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Definition
round cysts, large vacuoles surrounded by small dark nuclei
cytoplasmic rim
thick slime capsule |
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Term
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Definition
ingest: CYST
damage: biflagellated trophozoite |
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Term
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Definition
| humans accidental host via inhalation of water through nose, penetrate meninges |
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Term
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Definition
| initial presentation of frontal headache |
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Term
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Definition
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Term
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Definition
| human and swine reservoir |
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Term
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Definition
ingest: CYST water/food
damage: ciliated trophozoites invade LARGE INTESTINE |
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Term
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Definition
| ciliated trophozoites burrow in COLON creating ulcers and abscesses in ileum, colon, rectum |
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Term
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Definition
ciliated, ovoid trophozoites or cysts
kidney shaped macronuclei |
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Term
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Definition
| ciliated trophozoites transported in blood= hepatitis, pneumonia, myocarditis |
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Term
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Definition
ingest: OOCYST -> sporozoites -> schizonts ->
damage: MEROZOITES invade SMALL INTESTINE |
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Term
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Definition
carried in the gallbladder
obstruct bile duct |
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Term
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Definition
| auto-reinfection when sporozoites excyst in GI tract |
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Term
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Definition
| 4-6 micron round oocyts with 4 pyriform shaped nuclei |
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Term
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Definition
| humans, birds, and reptiles are reservoirs and definitive hosts |
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Term
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Definition
ingest: OCYST (fecal water/food)
damage: sporozoites binary fission invade JEJUNAL ENTEROCYTES |
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Term
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Definition
| asymptomatic excreters of oocysts |
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Term
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Definition
| glassy, wrinkled, spherical oocysts |
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Term
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Definition
humans=only reservoir
ovoid, unsporulated oocysts with two-layered walls |
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Term
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Definition
ingest: OOCYST --> sporozoites --> intracellular schizont
damage: MEROZOITES released from schizonts nvade SMALL INTESTINE |
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Term
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Definition
| hypertrophied crypts, collagen deposition, extraintestinal cysts |
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Term
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Definition
cats=definitive hosts
rodents, chickens, sheep, swine, cattle= reservoirs/intermediate hosts
humans= dead-end hosts |
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Term
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Definition
ingest: OOCYSTS ingested in milk/water or inhaled in cat feces
or BRADYZOITES from raw meat, or intrauterine
damage: TACHYZOITES invade retuculoendothelial system |
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Term
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Definition
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Term
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Definition
| Tachyzoites invade spleen, eyes, brain, and liver. They develop into pseudocysts that contain bradyzoites , whichrupture and invade macrophages |
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Term
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Definition
| pyriform shaped tachyzoites or cysts filled with bradyzoites |
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Term
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Definition
ingest: CYST (water, food, oral intercourse)
damage: excysted trophozoites feed on mucous in SMALL INTESTINE |
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Term
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Definition
| flagellated trophozoites act as barrier to fat absorption, resulting in greasy diarrhea. shortened villi |
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Term
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Definition
| flagellated trophozoites with 2 nuclei or cysts containing 2 organisms (4 nuclei) with axostyles |
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Term
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Definition
| communicable for months to years |
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Term
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Definition
| ingest: flagellated trophozoites by sexual contact or droplets on fomites. no cyst stage present |
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Term
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Definition
| colonies of flagellated trophozoites in vagina or urinary tract, destroy epithelial cells |
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Term
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Definition
vaginitis with frothy green/yellow secretions, fould odor
urethritis and prostatitis
cervical hemorrhage with petechiae |
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Term
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Definition
| pyriform, flagellated, motile trophozoites |
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Term
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Definition
| humans, mammals, fish, birds, and insects |
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Term
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Definition
ingest spores or transplacental infection
damage: meronts, sporonts, sporoblasts |
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Term
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Definition
| spores with central waistbands, coiled polar tubule, and 2 nuclei in spore body |
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Term
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Definition
| villi atrophy, conjunctivitis, liver, kidney, gallbladder, bladder, and brain infections, infiltration of lamina propria with plasma cells, lymphocytes, and macrophages |
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Term
| Cyclosporidium cayetanensis |
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Definition
| following ingestions, oocysts release SPOROZOITES, which invade small intestine causing villous blunting, malabsorption, and wasting syndrome |
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Term
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Definition
| most common diagnosed intestinal parasite in the US. Frequently in children. Cause of traveler's diarrhea |
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Term
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Definition
| fecal-oral cysts ingested, amoeba invades large intestine mucosa |
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Term
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Definition
| self-limited gastroenteritis in normal hosts, chronic and fatal in immunocompromised |
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Term
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Definition
| LOW VIRULENCE with only human hosts. ingest CYST from food or water. |
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Term
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Definition
| transported by the blood into spinal fluid. can produce hepatitis, pneumonia, or myocarditis |
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