PARASITOLOGY Flashcards
(166 cards)
one in which the sexual cycle occurs or the adult is present
DEFINITIVE HOST
one in which the asexual cycle occurs or the larva is present.
INTERMEDIATE HOST
In some helminthic infections, humans are ____
DEAD END HOSTS
the larval form in the human is not transmitted to other humans or animals
DEAD END HOST
actively motile, feeding, reproducing form
TROPHOZITE
nonmotile, nonmetabolizing, nonreproducing form surrounded by a thick wall.
CYST
cyst turns into ____ after entering the host
trophozite
seen in the environment
cyst
Certain protozoa, such as Leishmania and Trypanosoma, have flagellated forms called ____ or ____
promastigotes or trypomastigotes
non-flagellated forms
amastigotes
Transmission of the intestinal protozoa typically occurs by
ingestion of cysts
from contaminated water or food
Transmission of the blood protozoa occurs via
insect vectors
INTESTINAL PROTOZOA
- The cyst has four nuclei, an important diagnostic criterion.
- Cysts (ingested form) → Within the intestine → produces trophozoites
- Clinical findings:
o **Amebic dysentery **
o Amebic abscess of the liver
ENTAMOEBA HISTOLYTICA
INTESTINAL PROTOZOA | ENTAMOEBA HISTOLYTICA
cyst has how many nuclei
4
INTESTINAL PROTOZOA | ENTAMOEBA HISTOLYTICA
important diagnostic criterion
cyst w/ 4 nuclei
INTESTINAL PROTOZOA | ENTAMOEBA HISTOLYTICA
diarrhea, bloody stool, intestinal tract
amebic dysentry
INTESTINAL PROTOZOA | ENTAMOEBA HISTOLYTICA
has pus that contains trophozites
amebic abscess of the liver
INTESTINAL PROTOZOA | ENTAMOEBA HISTOLYTICA
DOC
metronidazole (Flagyl)
tinidazole
INTESTINAL PROTOZOA
- “Old man’s eyeglasses”
- Clinical findings:
o Watery (nonbloody), foul-smelling diarrhea
o Trophozoite causes inflammation of the duodenal mucosa, leading to malabsorption of protein and fat.
GIARDIA LAMBLIA
INTESTINAL PROTOZOA | GIARDIA LAMBLIA
other name
old man’s eyeglasses
INTESTINAL PROTOZOA | GIARDIA LAMBLIA
foul-smelling diarrhea can produce ____
(rotten egg odor)
H2S
INTESTINAL PROTOZOA | GIARDIA LAMBLIA
excessive fat in feces
steatorrhea
INTESTINAL PROTOZOA | GIARDIA LAMBLIA
Trophozoite causes inflammation of the duodenal mucosa, leading to malabsorption of ____ and ____
protein & fat
INTESTINAL PROTOZOA | GIARDIA LAMBLIA
Trophozoite causes inflammation of the ____, leading to malabsorption of protein and fat
duodenal mucosa