Transmission of amebas; Sporozoa; Hemosporidians Flashcards

1
Q

Entamoeba histolytica

A

Trophozoites in large intestine begin encystment in firming stools
Trophozoite form found in stool of dysentery patients; cyst in semisolid stools; metacyst in formed stools
Metacysts infective to new host

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2
Q

Naegleria fowleri

A

transmitted through water entering nasal passages (especially hot pools, or stagnant water in the summer)

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3
Q

Toxoplasma gondii

A

Transplacental - ̴3500 congenitally infected babies/year – U.S. – early embryonic death, stillbirth, retardation, blindness, etc.

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4
Q

Cryptosporidium sp

A

Fecal-oral contamination
Municipal water supplies
Swimming pools – chlorination doesn’t kill

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5
Q

Sarcocystis sp.

A

FH infected by eating tissue cyst in herbivores (very prevalent) – herbivores infected by ingesting sporocysts from carnivore feces.

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6
Q

Plasmodium sp.

A

Stages in RBCs/hepatocytes of vertebrate  transmitted to mosquito during blood meal  development in mosquito  to vertebrate during feeding

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7
Q

Babesia bigemina

A

tick, Boophilus annulatus – very host specific 1-host tick; transovarian transmission of B. bigemina occurs

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