Protozoan infetions of GI tract

Question 1

Amebiasis parasite, transmission

Answer 1

Entamoeba histolytica

Transmission: fecal-oral (contaminated water)

Question 2

Initial symptoms of Amebiasis

Answer 2

amebic dysentery–> blood and mucus in stool

Question 3

Entamoeba histolytica Cysts can be taken up

Answer 3

orally (ie from well water)

Question 4

Amebiasis pathology

Answer 4

amebic lesions in intestine (destruction of tissue), amebic abcesses on liver (can be fatal if untreated)

Question 5

Cryptosporidiosis parasite and transmission

Answer 5

Cryptosporidium parvum

Transmission: fecal-oral (contaminated water)

Question 6

Initial symptoms of Cryptosporidiosis

Answer 6

watery diarrhea (self-limiting in healthy inds, prolonged in AIDS patients)

Question 7

Giardiasis parasite and transmission

Answer 7

Giardia lamblia

Transmission: fecal-oral (contaminated water, clear mountain creeks)

Question 8

Initial symptoms of Giardiasis

Answer 8

watery diarrhea (very foul smelling)

Question 9

Giardiasis pathology

Answer 9

trophozoites in the intestine

dorsal sucking disk leaves mucosal scars; inflammation