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22 Cards in this Set
- Front
- Back
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What are Protozoa and Parasitic worm?
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I> Eukaryotes: parstic protoza: micro and parastic worm:macro
parasitci worm: micro in food as eggs or larave, but marco as adults causes INFECTIONS, complex life cycles: better to survive for long times, hard to get rid of after they are endemic due to poor sanitation and under cooked meat |
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What is the basic life style of prtozoans?
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asexual has 2 stages:
1) Trophozoites: growing stage analogous to vegetaive cells more complex sexual cycles, T becomes gametes, then zygoes->meiosis=sporozoites encases as Oocyst (excrted form) 2) Dormant stage: cysts analogous to vegetaive cells to spores but not as heat resistant |
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What is Entamoeba histolytica?
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several types, long term
disease and carrier status hard to contorl proliferate in colon cause bloody diara. liver infection lead to severe fatigure, susp to other infc, intermittent dysterndy due to reclonization of colon and long term carrier status |
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What are the symptons of Entamoeba histolytica?
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cause Amoebic
Dysentery 1) dysentery 2) liver infection |
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How is Entamoeba histolytica transmitted?
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Human are only host
sanitation problem rare in US but long term so can be imported from bad countries i.e malfunction in sanitation |
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What are the treatment of Entamoeba histolytica?
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Good sanitation
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What is the life cycle of Entamoeba histolytica?
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1)food ingested contamined with human feces containing cysts.
2)excystment in small intst follwed by growth of released T. and colon of lower intest. 3) T. invade and clonize liver, lead to generalized symptons 4) long term exretion of cysts |
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What is Toxoplasma gondii?
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parastic protozoan
cause toxoplasmosis no clinical symp but birth defeccts and seirous illness in immunocompromised host and encephalitis cats are requried for completion of cycle. Cats excrete cysts |
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What is transmission and control of T.gondii?
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Human infected by food contamined
with oocysts from soil or undercooked meat with cysts maybe be in utero and cause fetal neural damage tranmission is common no control |
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What is Giardia lamblia?
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cause giardiasis
recurring G* from untreated water |
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How do you transmit and control giardia?
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wild animla contaminate surface
water also food brone transmission only way to prevent it is chlorinatoin of drinking water |
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What is Cryptosporidium parvum?
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thought to be animal pathgoen
than ass. With AIDS. Not widespread helath till 93 |
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What are the symptons of Cryptosporidium parvum?
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cause cyrptosporidosis
ingestion of oocysts excysment in intest. then goes in life cycle in test. Cause serious disrrhea last 1-2 week but chornic in sicklely |
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How do you transmit and control C. parvum?
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parastic for domestic animals
esp. young calves kids in poor countries get infected resistsatn to cl heatin git more than 60c to kill itand filter less 10mm will remove it usually 2 standards for drinking water and household water |
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What is the basic lifestyle of parasitic worm carried in food?
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Dormant is eggs from worms or cysts for others
eggs become larvae, cyst undergo exystement into larvae larvage becomes worms…some are killed by cooking or heating food to 140F or freezing at 15F or below |
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What is Trichinella spiralis?
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Parasatic worm that spread when the cysts get ingested.
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What are the symptons of Trichinella spiralis?
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trichinosis
cause intst.sympton: pain,mild diarrhea fever, wakeess, musle pain… |
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What is the transmission and control of Trichinella spiralis?
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eating a meat eating animals
not from env unless env contains meat scraps ie.e pigs and bears pork food must be pasteruized cook pork to 170F freeze to 15F |
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What is Taenia saginata/T. solium?
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Beef/pork tapeworm
disease weakness + suscep. to other infections more serious if human to human |
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What is the transmission and control of Taenia saginata/T. solium?
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from eating undercooked meat
or ingestion of fecally contam water and food but human-human: brian infeciton or fatal sanitation in US is efficient |
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What is Diphyllobothriusm latum?
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fish tapeworm disease
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How do you transmit and control D.latum?
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ingestion of undercooked fresh
water fish i.e. coperod and fish cook fish or freeze several days before eating because fihs is not routnely inspected for infection |
