Flashcards
Gastrointestinal protozoa
Flashcards do conjunto (12)
- 1Gastrointenstinal protozoaENTAMOEBA HOSTOLYTICA
GIARDIA DUODENALIS
TOXOPLASMA GONDII - 2Disease caused:E.hostolytica = AMOEBIASIS in large intestine
G.duodenalis = TRAVELLERS DIARRHOEA
T.gondii = TOXOPLASMOSIS - 3Entamoeba statsOccurs in large intestine amd causes INTERNAL INFLAMMATION
50m infected worldwide -> mostly tropical countries
85-95% asymptomatic
5-15% asymptomatic
E.histolytica invasive form, e.dispar uninvasive form - 4Toxoplasma statsTISSUE CYST FORMING COCCIDIAN
Suggested >30% pop is infected
>60% people in US said to be affected
High prevalence in france and germany
Rare in south korea
Usually asymptomatic
Problematic fro weakened immune systems and pregnant women - 5Giardia STATSGlobal disease
Affects up to 2% of adults and 6-8% of children in developing countries
Nearly 33% of people in undev countries have already had it
Infection rates twice as high in summer
infected by contaminated food or water - 6Entamoeba LIFECYCLEHuman ingests mature cyst by contaminated food or water
Excystation occurs in small intestine and trophozoites are released
Trophozoites migrate to large intestine and multiply by binary fission producing cysts
Cysts excreted in formed stool
Trophozoites excreted in diarrhoea - uninfective form
Trophozoutes cannot survive external environment and if ingested woukdnt survive exposure to gastric environment
Cysts can survive days to weeks in extrenal environment because of its outer shell
In some, trophozoites invade intenstinal mucus and ingest rbcs = INTESTINAL DISEASE
Or through bloodstream, extraintestinal sites such as liver, brain and lungs
EXTRAINTESTINAL DISEASE - 7Giardia LIFECYCLEHuman eats or drinks contaminated food containing cysts
Cysts excyst in the small intestine and release trophozoites
Multiply by longitudinal binary fission
Cysts passed in stool, trophozoute passed in diarrhoea - 8Toxoplasma LIFECYCLECats become infected by eating intermediate hosts affected with BRADYZOITE CYSTS
Unsporulated OOCYSTS are shed in cats feces (only 7-14 days)
OOCYSTS take 1-5 days to sporulate in the environment and become infective
Intermediate hosts in nature become infected after ingesting soil, water or plant
Oocysts transform into TACHYZOITES shortly after ingestion.
They localise in neural amd muscle tissue and deveop into tissue cysts BRADYZOITES
The unsporulated oocysts may also by co sumed by animals bred for human consumption
Human can consume food or water infected
Can handle environmental contaminated boxes eg litter tray
Can lay dormant inhuman as bradyzoite
Produce cysts in skeletal muscle, eyes, myocardium amd brain - 9Toxoplasma studiesRats fearless to cats
Strong correlation to schizophrenia
Women more likely to cheat on husbands
Men more aggressive
Slower reaction times
More likely to be in a car crash - 10Acute toxoplasmosis10-20% patients
Sore lymph nodes
Muscle pains
Last several weeks then go away
Parasite remains in body as BRADYZOITE
Reactivate if become immunosuppressed - 11Toxoplasmosis symptomsConfusion
Headache
Fever
Nausea
Poor coordination
Seizures - 12Congenital toxoplasmosis can causeEYE DISEASE
Eye lesions occur in 20-80% of infected individuals when they reach adulthood
Born with abnormal enlargement or small head
Informações
- Descrição
- FlashCards sobre Gastrointestinal protozoa, criado por l.blake em 12-05-2015.
- Criado por
- l.blake · mai 2015
- Atualizado
- 16 dez 2016
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