PARASITOLOGY (PROTOZOANS)
questions and answers
non-motile, non feeding stage and infective stagecyst
has protoplasmic processes or pseudopodia for locomotionclass sarcodina
only class sarcodina with no cystic stageEntamoeba gingivalis
class sarcodina inhabits the large intestine exceptEn...
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
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)
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