PARASITOLOGY (PROTOZOANS)
questions and answers
non-motile, non feeding stage and infective stage✔✔cyst
has protoplasmic processes or pseudopodia for locomotion✔✔class sarcodina
only class sarcodina with no cystic stage✔✔Entamoeba gingivalis
class sarcodina inhabits the large intestine except✔✔Entamoeba gingivalis
Class sarcodina members are commensal except✔✔Entamoeba histolytica
T/F: amoeba excreted as trophozoites can mature into cyst✔✔false. amoeba
excreted as trophozoites CANNOT mature into cyst
motile, feeding and vegetative stage✔✔Trophozoite
cyst are frequently found in what type of stools?✔✔formed
trophozoites are frequently found in what type of stool?✔✔diarrheal and liquid stools
excystation occurs in the _______ and organisms begin to multiply as
______✔✔lower intestine; trophozoite
the only pathogenic ameba✔✔E. histolytica
infective form of E. histolytica✔✔mature quadrinucleate cyst
life cycle of ameba✔✔trophozoite stage → precystic stage → cystic stage →
metacystic stage
causes amebic colitis, amoebic dysentery, intestinal and extraintestinal
amebiasis✔✔E. histolytica
typical amoebic ulcer caused by E. histolytica has _______ shaped✔✔flask-shaped;
mouth and neck being narrow and base large and rounded
hepatic involvement of E. histolytica extraintestinal amebiasis produces✔✔thick
chocolate brown pus/ anchovy pus (which is liquefied necrotic liver tissue)
special media that supports E. histolytica in culture✔✔TYI-S-33
pulmonary amebiasis results in expectation of✔✔chocolate brown sputum
, CNS involvement of E. histolytica results to✔✔Secondary amebic
meningoencephalitis
coffin shaped chromatodial bars and mature cyst with 4 nuclei✔✔E. histolytica
splinter like chromatodial bar cyst with 8 nuclei✔✔E. coli
ameba that moves in one direction and has only one pseudopod thrusted out in
explosive manner✔✔E. histolytica
ameba that tries to move in several direction at the same time — sluggish
motion✔✔E. coli
morphologically similar to E. histolytica✔✔E. dispar and E. moshkovskii
"small race" E. histolytica✔✔Entamoeba hartmanni
Major causative agent of PRIMARY AMEBIC MENINGOENCEPHALITIS
(PAM)✔✔Naegleria fowleri
MOT of Naegleria fowleri✔✔inhalation or aspiration of water
incapable of survival in clean, chlorinated water✔✔N. fowleri
causes Granulomatous Amebic Encephalitis (GAR)✔✔Acanthamoeba spp. (A.
culbertsoni)
trophozoite is large and is characterized by spine-like
pseudopodia✔✔Acanthamoeba spp
stains used in Acanthamoeba spp✔✔Periodic acid schiff stain and methenamine
silver stain
amoeba with no flaggelated stage✔✔Acanthamoeba and Balamuthia
class Mastigophora possess whiplike locomotory organelle called✔✔flagella
a rodlike support structure found in some flagellates✔✔axostyle
flagellates found in the alimentary tract and urogenital tract✔✔lumen dwelling
flagellates
flagellates found in blood and tissues✔✔hemoflagellates
majority of the flagellates live in the large intestine except for✔✔T. tenax (mouth)
and T. vaginalis (vagina and urethra)
questions and answers
non-motile, non feeding stage and infective stage✔✔cyst
has protoplasmic processes or pseudopodia for locomotion✔✔class sarcodina
only class sarcodina with no cystic stage✔✔Entamoeba gingivalis
class sarcodina inhabits the large intestine except✔✔Entamoeba gingivalis
Class sarcodina members are commensal except✔✔Entamoeba histolytica
T/F: amoeba excreted as trophozoites can mature into cyst✔✔false. amoeba
excreted as trophozoites CANNOT mature into cyst
motile, feeding and vegetative stage✔✔Trophozoite
cyst are frequently found in what type of stools?✔✔formed
trophozoites are frequently found in what type of stool?✔✔diarrheal and liquid stools
excystation occurs in the _______ and organisms begin to multiply as
______✔✔lower intestine; trophozoite
the only pathogenic ameba✔✔E. histolytica
infective form of E. histolytica✔✔mature quadrinucleate cyst
life cycle of ameba✔✔trophozoite stage → precystic stage → cystic stage →
metacystic stage
causes amebic colitis, amoebic dysentery, intestinal and extraintestinal
amebiasis✔✔E. histolytica
typical amoebic ulcer caused by E. histolytica has _______ shaped✔✔flask-shaped;
mouth and neck being narrow and base large and rounded
hepatic involvement of E. histolytica extraintestinal amebiasis produces✔✔thick
chocolate brown pus/ anchovy pus (which is liquefied necrotic liver tissue)
special media that supports E. histolytica in culture✔✔TYI-S-33
pulmonary amebiasis results in expectation of✔✔chocolate brown sputum
, CNS involvement of E. histolytica results to✔✔Secondary amebic
meningoencephalitis
coffin shaped chromatodial bars and mature cyst with 4 nuclei✔✔E. histolytica
splinter like chromatodial bar cyst with 8 nuclei✔✔E. coli
ameba that moves in one direction and has only one pseudopod thrusted out in
explosive manner✔✔E. histolytica
ameba that tries to move in several direction at the same time — sluggish
motion✔✔E. coli
morphologically similar to E. histolytica✔✔E. dispar and E. moshkovskii
"small race" E. histolytica✔✔Entamoeba hartmanni
Major causative agent of PRIMARY AMEBIC MENINGOENCEPHALITIS
(PAM)✔✔Naegleria fowleri
MOT of Naegleria fowleri✔✔inhalation or aspiration of water
incapable of survival in clean, chlorinated water✔✔N. fowleri
causes Granulomatous Amebic Encephalitis (GAR)✔✔Acanthamoeba spp. (A.
culbertsoni)
trophozoite is large and is characterized by spine-like
pseudopodia✔✔Acanthamoeba spp
stains used in Acanthamoeba spp✔✔Periodic acid schiff stain and methenamine
silver stain
amoeba with no flaggelated stage✔✔Acanthamoeba and Balamuthia
class Mastigophora possess whiplike locomotory organelle called✔✔flagella
a rodlike support structure found in some flagellates✔✔axostyle
flagellates found in the alimentary tract and urogenital tract✔✔lumen dwelling
flagellates
flagellates found in blood and tissues✔✔hemoflagellates
majority of the flagellates live in the large intestine except for✔✔T. tenax (mouth)
and T. vaginalis (vagina and urethra)
