A. is a free-living ameba of fresh waters.
B. enters typically through broken skin or the conjunctiva.
C. is the cause of primary amebic meningoencephalitis.
D. enters through the nasal mucosa.
E. is acquired by swimming in contaminated water.
A. ingestion of cysts of the pathogen.
B. contaminated food.
C. contaminated water.
D. sexual contact.
E. All of the choices are correct.
A. conjunctiva of the eye.
B. brain and meninges.
C. intestines and often the liver.
D. lung tissue.
E. skin.
A. balantidiasis.
B. amebiasis and trichomoniasis.
C. elephantiasis.
D. trypanosomiasis and leishmaniasis.
E. cryptosporidiosis and malaria.
A. balantidiasis.
B. amebiasis and trichomoniasis.
C. amebic meningoencephalitis.
D. trypanosomiasis and leishmaniasis.
E. cryptosporidiosis and cyclosporiasis.
A. balantidiasis.
B. amebiasis and trichomoniasis.
C. amebic meningoencephalitis.
D. trypanosomiasis leishmaniasis.
E. cryptosporidiosis and cyclosporiasis.
A. Naegleria fowleri
B. Toxoplasma gondii
C. Balantidium coli
D. Giardia lamblia
E. Entamoeba histolytica
A. Naegleria fowleri
B. Toxoplasma gondii
C. Balantidium coli
D. Giardia lamblia
E. Entamoeba histolytica
A. Naegleria fowleri
B. Toxoplasma gondii
C. Balantidium coli
D. Giardia lamblia
E. Entamoeba histolytica
A. toxoplasmosis
B. trichomoniasis
C. giardiasis
D. malaria
E. balantidiasis
A. Toxoplasmosis
B. Trichomoniasis
C. Giardiasis
D. Malaria
E. Balantidiasis
A. Cryptosporidiosis.
B. Cyclosporiasis.
C. Babesiosis.
D. Balantidiasis.
E. Giardiasis.
A. bloody, mucus-filled stools, fever, diarrhea, and weight loss.
B. fever, swollen lymph nodes, and joint pain.
C. urinary frequency and pain, and vaginal discharge.
D. chills, fever, and sweating.
E. sore throat, low-grade fever, and swollen lymph nodes.
A. bloody, mucus-filled stools, fever, diarrhea, and weight loss.
B. fever, swollen lymph nodes, and joint pain.
C. urinary frequency and pain, and vaginal discharge.
D. chills, fever, and sweating.
E. sore throat, low grade fever, and swollen lymph nodes.
A. bloody, mucus-filled stools, fever, diarrhea, and weight loss
B. fever, swollen lymph nodes, and joint pain
C. urinary frequency and pain, and vaginal discharge
D. chills, fever, and sweating
E. sore throat, low grade fever, and swollen lymph nodes
A. does not produce cysts.
B. in males causes urethritis.
C. in females causes vaginitis with a foul-smelling discharge.
D. has four flagella and an undulating membrane.
E. All of the choices are correct.
A. a protozoan that does not form cysts.
B. infection of the large intestine.
C. symptoms of abdominal pain, flatulence, and diarrhea.
D. vector transmission.
E. All of the choices are correct.
A. Trypanosoma cruzi.
B. Trypanosoma brucei.
C. Leishmania brasiliensis.
D. Isospora belli.
E. Plasmodium falciparum.
A. reduviid, “kissing,” bug.
B. tsetse fly.
C. Anopheles mosquito.
D. phlebotomine (sand) fly.
E. hard-bodied tick.
A. reduviid, “kissing,” bug.
B. tsetse fly.
C. Anopheles mosquito.
D. phlebotomine (sand) fly.
E. hard bodied tick.
A. reduviid, “kissing,” bug.
B. tsetse fly.
C. Anopheles mosquito.
D. phlebotomine (sand) fly.
E. hard bodied tick.
A. epimastigote.
B. amastigote.
C. trypomastigote.
D. promastigote.
E. None of the choices are correct.
A. merozoites enter and multiply in liver cells
B. trophozoites develop in RBCs
C. the mosquito inoculates human blood with sporozoites
D. gametocytes enter the mosquito as she draws a blood meal from a human
E. None of the choices are correct.
A. cryptosporidiosis.
B. cyclosporiasis.
C. babesiosis.
D. toxoplasmosis.
E. None of the choices are correct.
A. Cryptosporidiosis
B. Babesiosis
C. Babesiosis
D. Toxoplasmosis
E. None of the choices are correct.
A. cryptosporidiosis
B. cyclosporiasis
C. babesiosis
D. toxoplasmosis
E. None of the choices are correct.
A. ingesting pseudocysts from contaminated raw or undercooked meat.
B. ingesting or inhaling oocysts from infected cats or cat feces.
C. tachyzoites can cross the placenta.
D. immunocompromised patients often develop a fatal, disseminated infection.
E. intrauterine infectious are generally mild with very little damage to fetal tissues.
A. headache, sweating, vomiting, severe abdominal cramps, and diarrhea.
B. a circular rash that appears on the trunk and spreads to the extremities.
C. loss of hair.
D. a red skin papule that spreads to a large ulcer.
E. None of the choices are correct.
A. headache, sweating, vomiting, severe abdominal cramps, and diarrhea.
B. a circular rash that appears on the trunk and spreads to the extremities.
C. loss of hair.
D. a red skin papule that spreads to a large ulcer.
E. None of the choices are correct.
A. Whipworm – trematode
B. Pinworm – nematode
C. Threadworm – nematode
D. Fluke – trematode
E. Tapeworm – cestode
A. is an intestinal roundworm.
B. spreads to humans by ingestion of Ascaris eggs in food.
C. larvae penetrate into lymphatics and capillaries around intestines.
D. larvae migrate to the pharynx, get swallowed, and return to intestines to mature.
E. All of the choices are correct.
A. a whipworm.
B. common only to the tropics and subtropics.
C. an intestinal worm that easily contaminates fingers and fomites.
D. often fatal in heavy infestations.
E. All of the choices are correct.
A. include Necator americanus.
B. include Ancylostoma duodenale.
C. have filariform larvae in soil that get transmitted into bare feet.
D. have oral cutting plates by which they anchor to the intestines.
E. All of the choices are correct.
A. is a tapeworm.
B. is ingested with food and does not migrate out of the intestine.
C. chronic infection is very rare.
D. immunosuppressed patients can die from disseminated disease.
E. All of the choices are correct.
A. encysted larvae get ingested.
B. associated with undercooked pork or bear meat.
C. migrate from intestines to blood and various body tissues.
D. the first symptoms are diarrhea, nausea, fever, and pain.
E. All of the choices are correct.
A. it is caused by filarial nematodes.
B. helminth is transmitted by black fly vectors.
C. larval infestation causes blockage of main lymphatic channels.
D. severe edema occurs in the extremities and scrotum.
E. microfilariae are in the blood.
A. caused by Wuchereria bancrofti.
B. a disease in which worms can invade the eyes.
C. caused by a blood fluke.
D. transmitted by mosquito vector.
E. All of the choices are correct.
A. a blood fluke.
B. eggs from humans enter water and develop into miracidium.
C. snails allow development into cercaria.
D. cercariae enter hair follicles and pass to the blood and then the liver.
E. All of the choices are correct.
A. lung fluke.
B. blood fluke.
C. liver fluke.
D. roundworm.
E. filarial worm.
A. scolex is the head.
B. strobila is made up of proglottids.
C. proglottids are reproductive segments.
D. cysticerci are young infective larvae ingested in undercooked meat.
E. one proglottid segment will have either female or male reproductive organs.
A. Diphyllobothrium latum – fish
B. Taenia solium – pork
C. Taenia saginata – beef
D. Echinococcus granulosus – poultry
E. Anisakis – fish
A. epimastigote.
B. amastigote.
C. trypomastigote.
D. promastigote.
E. None of the choices are correct.
A. boiling.
B. ozone.
C. iodine.
D. chlorine in typical drinking water.
E. All of the methods listed will kill it.
Which of the following is not an effective way to minimize human contact with parasitic helminths?
A. freezing foods
B. thoroughly cooking foods
C. proper sewage disposal
D. avoiding human feces as fertilizer
E. These are all effective ways.
A. It can be transmitted by eating undercooked pork.
B. It can be transmitted by eating bear meat.
C. Only a few cases occur each year in the U.S.
D. The first symptoms mimic influenza.
A. Schistosoma mansoni
B. Dracunculus medinesis
C. Fasciola hepatica
D. Taenia saginata
E. Toxoplasma gondii
A. toxoplasmosis.
B. malaria.
C. trypanosomiasis.
D. amebic dysentery.
E. Chagas disease.
A. It is fatal in untreated cases.
B. Chemotherapy with chloroquine is usually effective.
C. Death is partly due to anemia, destruction of blood-forming tissues, and secondary infections.
D. It is transmitted by the sand fly.
E. It is a form of leishmaniasis.
A. humans.
B. pigs.
C. cats.
D. dogs.
E. bears.
A. proglottids.
B. merozoite.
C. cysticerci.
D. amastigote.
E. egg.
A. roundworm, intestine
B. ameba, intestine
C. flagellate, large intestine
D. flatworm, heart
E. tapeworm, lungs
A. Lichens and trees
B. E. coli and human gut
C. Riftia and tube worms
D. Rhizopus and raspberries
E. Fonsecaea pedrosoi and human feet
F. Both D and E
A. T. brucei gambiense and Gambian sleeping sickness
B. T.b. rhodesiense and Gambian sleeping sickness
C. Tsetse fly and African Sleeping sickness
D. Teania solium and swine