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PARASITOLOGY
JEOPARDY
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This motile stage of a protozoan
feeds, multiplies, and maintains the
colony within the host.
Trophoziote
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This form of Plasmodium develops
inside the sporocyst, invades the
salivary glands of the mosquito, and
is transmitted to humans.
Sporozoite
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This is the name given to any
arthropod or other living carrier that
transports a pathologic
microorganism from an infected to a
noninfected host.
Vector
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This is the name given to the
trophozoites released from human
red blood cells or liver cells at
maturation of the asexual cycle of
malaria.
Merozoite
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This organism causes traveler’s
disease which is characterized by
abdominal pain, diarrhea, foulsmelling gas, and mechanical
irritation of intestinal mucosa with
shortening of vili and inflammatory
foci.
Giardia lamblia
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Humans are the only definitive host
for these parasites which usually
causes asymptomatic infections
although abdominal pain, diarrhea
and weight loss can occur following
ingestion of undercooked beef or
pork (genus name only).
Taenia
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This parasitic disease ranks second
behind malaria as a cause of serious
worldwide morbidity and mortality
and is spreading and increasing
because of recent new water control
projects which provide increased
snail breeding areas.
Schistosomiasis
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This parasite has two forms in its life
cycle: one which multiplies in
macrophages in man, and a second
which is found in the midgut of the
sandfly (genus name only):
Leishmania
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This organism causes small
intestinal edema and inflammation,
nausea, vomiting, abdominal pain,
headache, and fever with a rising
eosinophilia and can be identified as
encapsulated larvae in biopsied
muscle in severe cases but is usually
non-life-threatening:
Trichinella spiralis
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The egg of this blood fluke is
characterized morphologically by a
large lateral spine which serves as
an important diagnostic feature in
differential diagnosis.
Schistosoma mansoni
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This worldwide parasite often causes
chronic infection associated with vague
abdominal discomfort, malaise, diarrhea
alternating with constipation (sometimes
confused with ulcerative colitis) often
lasting for years and can sometimes invade
the liver and cause a single abscess in the
right lobe.
Entamoeba histolytica
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Infection with this third most
common helminth causes weight loss
and weakness and is common among
children and institutionalized
individuals and is seen in warm
countries and the southern US.
Trichuris trichiura
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Infection with this parasite is usually
limited to minute ulcers and mild
inflammation of the intestine causing
severe perianal itching (genus name
only).
Enterobiasis
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This organism causes sleeping
sickness.
Trypanosoma brucei
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This protozoan infection can be
contracted from infected cats.
Toxoplasmosis
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This class of agents is used for the
treatment of Leishmanias.
Antimonial compounds
(other acceptable answers are
Sodium stibogluconate
also known as Pentostam, or
Meglumine antimoniate also known
as Glucantime)
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The sickle cell gene provides a
selective advantage to parasitemia
caused by this organism.
Plasmodia falciparum
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Oocysts of this small spherical
parasite are fully mature and
immediately infectious upon passage
in the feces.
Cryptosporidia
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This ameba can lyse colonic epethelial cells
producing small mucosal
ulcerations.
Entamoeba histolytica
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This organism is usually sexually
transmitted and causes a persistent
vaginitis.
Trypanosoma brucei
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These structures are typically observed
microscopically in tissue
biopsies or aspirates obtained from
patients with leishmanias.
Leishman-Donovan bodies
(another acceptable answer is
amastigotes)
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Antigenic variation is the principal
mechanism of evading immune
destruction by this organism.
Trypanosoma brucei
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This parasitic disease is the leading
cause of heart disease in South
and Central America.
Chagas disease
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Members of this superfamily of parasites
can gain access to the human
lymphatic system and may induce
lymphadenitis, eosinophilia and in extreme
cases elephantiasis.
Filiarioidea
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This organism causes river blindness
and is transmitted by black
fly-larva.
Onchocerca volvulus
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THE END