Parasitology Quiz Questions (Part I)

A 10-year-old boy with symptoms of meningitis and history of swimming in his far pond was brough to the hospital emergency department. Examination of his CSF revealed motile amoeba measuring 10micometers in diameter. The most likely parasite is __________. a. Dientamoeba fragilis trophozoites b. Dientamoeba fragilis cysts c. Entamoeba hystolitica cysts d. Entamoeba hystolytica trophozoites

a. Dientamoeba fragilis

African sleeping sickness is caused by _______________. a. Trypanosoma brucei b. Plasmodium falciparum c. Leishmania brasiliensis d. Isospora belli e. Trypanosoma cruzi

a. Trypanosoma brucei

trichinella spiralis is a __________ that invades the ______.

a. ameba, intestine b. roundworm, intestine and muslce c. flagellate, large intestine d. tapeworm, lungs e. flatworm, heart

many individuals in a sub-trobical region have been infected by a helminth, capabalbe of exiting the host through the nose, mouth and anus. the white creamy worms are ___________. a. ascaris lumbricoides b. ancyclostoma duodenale c. anisakis marina d. ancylostoma canium

a. ascaris lumbricoides

the large intestines of pigs are the primary reservoir fo the pathogen that causes: a. balantidiasis b. amebiasis and trichomoniasis c. trypanosomiasis leishmaniasis d. cryptosporidiosis and cyclospriasis e. amebic meningoencephalitis

a. balantidiasis

which cells are more likely to be associated with destorying parastic worm infection? a. eosinophile b. neutrophils c. macrophages d. basophils

a. eosinophile

local city water supplies have been sources of parasititic infections. the most common organisms implicated in these events include a. Trypansoma brucei and Entamoeba hystolytica b. Toxoplasma gondii and Entamoeba hystolytica c. Cryptosporidium parvum and Giardia lamblia d. Giardia Lamblia and Toxoplasma gondii

c. Cryptosporidium parvum and Giardia lamblia

all following protozoan infect cardiovascular lymphatic systems EXCEPT _____. a. Plasmodium species b. Trypanosoma species c. Cyclospora species d. Leishmania species

c. Cyclospora

Which of the following parasitic organisms is considered to be a sexually transmitted disease? a. Trypanosoma cruzi b. Dientamoeba fragilis c. Trichomonas vaginalis c. Leishmania braziliensis

c. Trichomonas vaginalis

the host in which the parasite reaches sexual or reproductive maturity is reffered to as a ______. a. transport host b. intermediate host c. reservoir host d. definitive host

d. definitive host

the diagnosis of enterobius vermicularis infection is accomplished by observing ______. a. eggs in feces b. larva in feces c. trophozoites in feces d. eggs recovered from the perianal region

d. eggs recovered from the perianal region

which transmitted viat tsetse fly bites? a. African sleeping sickness b. Giardiasis c. Chagas' disease d. Leishmaniasis

a. African sleeping sickness

Which of the following diseases is transmitted via contaminated water? a. Chagas' disease b. Giardiasis c. African sleeping sickness d. Leishmaniasis

b. Giardiasis

Visceral leishmaniasis is caused by __________. a. Trypanosoma brucei gambience b. Leishmania donovani c. Trypanosoma cruzi d. Leishmana brazilensis e. Lesihmania braziliensis

b. Leishmania donovani

neglected tropical diseases are ___________. a. infecting significant amount of people b. difficult to treat and prevent c. demonstrating severe symptom d. primarily in tropical areas e. all of the above

e. all of the above

ascaris lmbricoides _____________. a. larvae penetrate into lympahtics and capilaries around intestines b. is an intestial roundworm c. larvae migrate to the pharynx, get swallowed and return to intestines to mature d. spreads ot humans by ingestion of ascaris eggs in food e. all of the choices are correct

e. all of the choices are correct

trichinellosis includes all of the following except ________. a. the first symptoms are diarrhea, nausea, fever and pain b. humans are infected by ingesting encysted larvae c. the larvae migrate from teh intestintes to blood and various body tissues d. infection is associated with ingestion of undercooked pork or breat meat e. all of the choices are correct

e. all of the choices are correct

hookworms and threadworms usually enter the body by penetrating into the skin. a. true b. false

a. true

in temperate zones, pinworms are the most common helminth infection. a. true b. false

a. true

toxoplasmosis includes all the following EXCEPT _______. a. intrauterine infections are generally mild with little damage to fetal tissues b. tachzoites can cross the placenta c. immunocompromised patients often develop a fatal, disseminated infection d. ingesting or inhaling oocysts from infected cats or cat feces e. ingesting pseudocysts from contaminated raw or undercooked meat

a. intrauterine infections are generally mild with little damage to fetal tissues

which of the following infections are not diagnoses by finding eggs or larva in fecal specimens? a. necator spp. b. ascaris lumbricodes c. trichenella spiralis d. trichuris trichiura

a. necator spp. b. ascaris lumbricodes c. trichenella spiralis d. trichuris trichiura

concomitant infection refers to___________. a. one individual infected with more than one pathgen during the same time period b. chronic infection involving more than one organ c. infection with latent stage d. infection treated with more than one antibiotic

a. one individual infected with more than one pathogen during the same time period

Chagas' disease involves transmission of the pathogen by the ____________. a. reduviid, "kissing," bug b. Anopheles mosquito c. hard-bodied tick d. phlebotomine (sand) fly e. tsetse fly

a. reduviid, "kissing," bug

a person carrying on gene for sickle-cell hemoglobin will be resistant to Plasmodium infection a. true b. false

a. true

human asymptomatic carriers are common in ______. a. elephantiasis b. amebiasis and trichomoniasis c. cryptospordiosis and malaria d. balantidiasis e. trypanosomiasis and leishmaniasis

b. amebiasis and trichomoniasis

enterobius vermicularis is __________. a. often fatal in heavy infestations b. an intestinal worm that easily contaminates fingers and fomites c. common only to the tropics and subtropics d. a whipworm e. all choices are correct

b. an intestinal worm that easily contaminates fingers and fomites

amebiasis symptoms include: a. fever, swollen lymph nodes and joint pain b. blood, mucus-filled stools, fever, diarrhea and weight loss c. sore throat, low-grade fever and swollen lymph nodes d. chills, fever and sweating

b. blood, mucus-filled stools, fever, diarrhea and weight loss

Toxoplasma gondii can infect most mammals, but can only reproduce in _______. a. pigs b. cats c. humans d. cattle

b. cats

plasmodium species are hemoflagellates a. true b. false

b. false

which is incorrect about Malaria? a. gametoclytes enter the mosquito as she draws blood from a human b. merozoties enter and multiply in liver cells c. trophozoites develop in RBCs d. the mosquito inoculates human blood with sporozoites e. none of the choices are correct

b. merozoties enter and multiply in liver cells

most patients with toxoplasmosis that are not immunocompromised experience a. chills, fever and sweating b. sore throat, low grade fever and swollen lymph nodes c. bloody, mucus-filled stools, fever, diarrhea and weight loss d. urinary frequency and pain, and vaginal discharge

b. sore through, low grade fever and swollen lymph nodes

all of the following are examples of asexual reproduction EXCEPT ______. a. multiple fission b. sporogony c. schizogony

b. sporogony

The Trypanosoma cruzi amastigote is _________. a. the non-dividing form found in the rejuviid bug b. the intraciellular, dividing form that can be found in macrophages or heart muscle c. has a characterisitc "C" shape d. none of the above

b. the intracellular, dividing form that can be found in macrophages or heart muscle

ground itch is caused by _______. a. hemoflagellates in teh blood stream, which induce a hypersensitivity reaction b. the larvae of hookworms in the epidermis that may die when too large c. the rlease of plasmodium sporozoties by the anopheles mosquito at the bite site d. none of te above

b. the larvae of hookworms in the epidermis that may die when too large

parasitic helminths have the following characteristics, except _________. a. they include tapeworms b. they have developmental forms that include cysts c. they are multicellular animals d. they have a definitive host where the adult form lives e. they include roundworms

b. they have devlopmentl forms that include cysts

which of the following parasitic diseases is a zoonosis? a. ascaris lumbricoides b. trichinella sprialis c. dracunculus medinensis d. strongyloides stercoralis

b. trichinella spiralis

all of the following can be transmitted by drinking contaminated water EXCEPT _______. a. Balantidiasis b. Cryptosporidiosis c. Babesiosis d. Giardiasis e. Cyclosporiasis

c. Babesiosis

symptoms of cryptosporidiosis include ______. a. a circular rash that appears on the trunk and spreads to the extremities b. loss of hair c. headache, sweating, vomiting, severe abdominal cramps and diarrhea d. a red skin papule that spreads to a large ulcer

c. headache, sweating, vomiting, severe abdominal cramps and diarrhea

entamoeba hystolytic trophozoite may be identified by whcih fo the following morphologic features? a. ingested WBCs and two nucleoli with central karyosomes b. ingested RBCs and a single nucleus with an eccentric karyosome c. ingested RBCs and a single nucleus with an eccentric karyosome

c. ingested RBCs and a single nucleus with a central karyosome

amebiasis is primarily a disease of the _________. a. conjunctiva of the eye b. lung tissue c. intestines and often the liver d. skin e. brain and meninges

c. intestines and often the liver

which is not correct about trichinellosis? a. a cure is not available once the larvae have encysted in muscles b. the symptoms mimic influenza c. numerous cases occur each year in the US d. it can be transmitted by eating undercooked pork e. it can be transmitted by eating bear meat

c. numerous cases occur each year in the US

A Giardia lamblia trophozite sould be found in the _______. a. stomach b. liver c. small intestine d. kidney

c. small intestine

the free-living amoeba associated with meningitis is _________. a. Entamoeba coli b. Dientamoeba fragilis c. Entamoeba histolytica d. Naegleria fowleri

d. Naegleria fowleri

While on a backpacking trip in main, Julie and her friends obtained their drinking water form several different pristine streams, adding one or two drops of bleach to ensure its safety. Several days later Julie began eperiencing abdominal distress, specifically cramping, fatty diarrhea and flatulence. When it didn't clear up within several days, Julie visited her doctor. Which of the following would be most likely cause of Julie's symptoms? a. Schistosoma mansoni b. E. coli O157:H7 c. Entamoeba histolytica d. Giardia intestinalis e. Toxoplasma gondii

d. Giardia intestinalis

outbreaks of diarrhea have been caused by a parasite that has been associated with raspberries, strawberries, herbs and baby lettuces. the most likely parasite is: a. Cryptosporidium parvum b. Toxoplasma gondii c. Cyclosproa cayetanensis d. Giardia lamblia

d. Giardia lablia

which causes Chagas' disease? a. trypanosoma brucei gambience b. Leishmania donovani c. Trypanosoma cruzi d. Leishmania braziliensis

d. Leishmania brazilinesis

among the advice offered by a doctor to ensure a safe pregnancy, avoiding rare meat and avoiding cat litter were emphasized. these words of caution were directed at avoiding contact with ______. a. Cryptosporidium b. Taenia saginata c. E. coli O157:H7 d. Toxoplasma gondii

d. Toxoplasma gondii

the following is true regarding Dientoamoeba fragilis: a. no observable flagella but is classified as a flagellate b. the throphozoite has two nuclei connected by a division spindle filament c. moves by means of pseudopodia when seen in feces d. all of the above are true

d. all of the above are true

transmission of which organism can occur by ingestion of undercooked meat? a. Trichuris trichuria b. Toxoplasma gondii c. Trichinella spiralis d. both B and C

d. both B and C

which of the following regarding the structure/morphology of Trichomonas vaginalis is true? a. possesses a sucking disk concavity on the ventral side to assist with attachment to the mucosa b. often classified as a pseudocyst due to the fact that is possesses no observable flagella c. the trophozoite has two nuclei connected by a division spindle filament d. can be identified by its four anterior flagella and fifth flagellum that is incorporated within the undulating membrane

d. can be identified by its four anterior flagella and fifth flagellum that is incorporated within the undulating membrane

strongyloids stercoralis ____________. a. rarely causes chronic infection b. is ingested with food and does not migrate out of the intestine c. is a tapeworm d. can cause fatal disseminated disease in immunosuppressed patients e. all choices are correct

d. can cause fatal disseminated disease in immunosuppressed patients

which of the following is transmitted via mosquito bites?a. cryptosporidiosis b. african sleeping sickness c. giardasis d. malaria

d. malaria

an animal that harbors a parasite that can also infect humans is referred to as a_______. a. definitive host b. transport host c. intermediate host d. reservoir host

d. reservoir host

most patients with toxoplasmosis that are not immunocompromised experience _______. a. fever, swollen lymph nodes and joint pain b. urinary frequency and pain and vaginal discharge c. bloody, mucus-filled stools, fever, diarrhea and weight loss d. sore throat, low grade fever and swollen lymph nodes e. fever, swollen lymph nodes and joint pain

d. sore throat, low grade fever and swollen lymph nodes

the first stage of the clinical course of Trypanosoma brucei is characterized by _________. a. migration of the parasite along olfactory nerves leading to inflammation and infection of the brain b. lung invasion as a result of erosion of liver abscesses c. migration of the parasite along olfactory nerves leading to inflammation and infection of the brain d. the presence of the parasite in peripheral circulation, but not yet in the CNS

d. the presence of the parasite in peripheral circulation, but not yet in the CNS