PARASITOLOGY Flashcards
T/F: presence of parasites is accompanied with eosinophilia
FALSE
T/F: presence of worm parasites is accompanied with eosinophilia
TRUE
T/F: asexual multiplication of parasite occurs in the IH
TRUE
3 protozoa associated with PROTRACTED DIARRHEA
Giardia lamblia, Cryptosporidium parvum, Entamoeba histolytica
T/F: trophozoite is the active, vegetative stage of protozoa
TRUE
flukes and tapeworms belongs to which phylum?
platyhelminthes
parasite that causes swimmer’s itch
penetrating schistosome larva
T/F: hypersensitivity during parasitic infection is assoc. with increased IGE
TRUE
Stain used to examine the nucleus of amoeba
iron hematoxylin
if fecal specimens cannot be examined immediately, it should be _______
fixed by formalin or kept at body temp
T/F: E. histolytica can grow in cultures
TRUE
T/F: stool exam is notsuitable for diagnosis of T. spiralis
TRUE
T/F: a fresh stool specimen can show an active larva of S. stercoralis
TRUE
T/F: actively moving larva of S. stercoralis and hookworm can still be seen in old stool samples
TRUE
specimen shows active amoeba w/ cytoplasm containing ingested RBC, nucleus with central karyosome. Parasite is ____
E. histolytica
Blood smear shows RBC with Schuffner dots. Infection is due to ____
P. vivax
Thick blood smear taken at night showed microfilaria larva with well developed sheaths
W. bancrofti
Blood smear showed trypanosome lying in characteristic C-shape. Organism is _____
T. cruzi
Patient presents relapsing malaria. Which is responsible
P. vivax
Red cells in blood smear shows multiple infections with ring stages. Indicates infection with:
P. falciparum
Worm egg with terminal spine found in urine sample indicates infection with____
S. haematobium
Specimen shows protozoan w/sucking disc, 2 nuclei and eight flagella. Organism is ___
G. lamblia
T/F: serological test is better than any other test in identifying parasitic organisms
FALSE
T/F: CSF is valuable in dx of African trypanosomiasis
TRUE
T/F: Dientamoeba fragilis may cause diarrhea, abdominal pain and discomfort
TRUE
An amoeba, sometimes found in mouth in conditions of pyorrhea
Entamoeba gingivalis
T/F: All amoeba produce cyst
FALSE
T/F: in bowel discharges, bacillary dysentery produces a much more baundant cellular exudate than amoebic dysentery
TRUE
T/F: eosinophils in large numbers may be seen in the stool of acute bacillary dysentery
FALSE
T/F: charcot-leyden crystals are a frequent finding in the stool of acute amoebic dysentery
TRUE
T/F: The extra-intestinal abscess caused by E. histolytica are sterile
TRUE
A lemon-haped protozoan cyst w/ large nucleus containing a large karyosome near the nuclear membrane is ____
Chilomastix mesnili
T/F: Giardia infections can cause enteritis
TRUE
T/F: IgM is greatly increased with African trypanosomiasis
TRUE
During sleeping stage, what body fluid should be tested to diagnose sleeping sickness?
CSF
During febrile stage, what body fluid should be tested to diagnose sleeping sickness?
blood
____ sign is theearly diagnostic sign for Chaga’s disease
Romana’s sign
What is the vector of T. cruzi?
Kissing fly (Triatoma)
Which stage of C. parvum can be found in stool?
oocyst
T/F: Anopheles mosquito is the only vector of malaria
TRUE
the female sex cell of malaria is known as
macrogametocyte
a malarial parasite undergoing asexual multiplication and characterized by dividing masses of chromatin is called
schizont
male malarial parasite is called:
microgametocyte
oval presegmenters can be found in which malaria species
P. ovale
which malarial species has the longest sexual cycle
P.malariae
rosette formation of merozoites in schizonts can be seen in which malarial specie
P. falciparum
which malarial parasite enlarges RBC
P. vivax
not all stages of parasite occur in peripheral blood in which malaria sp?
P. falciparum
multiple infection in same RBC rarely occurs in which malaria sp?
P. vivax
crescent shaped gametocyte are characteristic of which malarial sp?
P. falciparum
____ fever: a highly fatal disease associated with P. falciparum
Blackwater fever
Reservoir animal of Balantidium coli
cochon :)
T/F: all flukes require snail as IH
TRUE
largest fluke found in man
F. buski
T/F: unless the scolex of a tapeworm is removed from the intestine, adult worm may regrow
TRUE
T/F: adult tapeworms are only foun d in the smallintestine of man
TRUE
sparganosis infection is due to which organism
D. latum
what is the largest adult worm
A. lumbricoides
which nematode does not ordinarily produce eggs in feces
S. stercoralis
which nematode egg is football shaped with typical plug at the end of each pole
T. trichiura
T/F: larva of A. lumbricoides can be found in sputum
TRUE
T/F: Periorbital edema is an early sign of acute infection of T. trichiura
FALSE (T. spiralis)
Old world hookwork
Ancylostoma duodenale
T/F: chyluria can be frequently seen in cases of Bancroft’s filariasis
TRUE
Eye worm
Loa loa
Guinea worm
Dracunculus medinensis
visceral larva migrans is caused by
Toxocara canis
which is not a type of symbiotic relationship: a) parasitism b)commensalism c) mutualism d) symbiolism
D
Amoeba move by means of a) pseudopodia b)cilia c) flagellla d) none
A
if roundworms:nematodes then flatworms: ______
platyhelminthes
T/F: Giardia infections always cause severe diarrhea
FALSE
T/F: trichomonas hominis is found in the urethra of man
FALSE
T/F: trichomonas vaginalis can be found in the urtethra of man
TRUE
Trypanosoma cruzi multiplies in the human body in which form
amastigote
T/F:African trypanosomes are transmitted by tsetse flies
TRUE
T/F: leishmania are transmitted by bite of sandfly
TRUE
Leishmania can be found in macrophages: T/F
TRUE
Most characteristic feature of blackwater fever
intravascular hemolysis
malarial parasite stage infective to man
sporozoite
T/F: ookinete can be foun in humans
FALSE (mosquito)
usual location of E. granulosus in man
liver
usual location of H. nana in man
intestine
usual location of D. caninum in man
intestine
patient present with acute diarrhea after eating pork meat is likely to be infected by which nematode?
T. spiralis
usual location of D. medinensis in man
subcutaneous tissue
