Question 1

The form lacking a free flagellum in the developmental stage of a hemoflagellate is called the

Accepted Answer

A) epimastigote. 
B) amastigote. 
C) trypomastigote. 
D) promastigote. 
A) epimastigote. 
B) amastigote. 
C) trypomastigote. 
D) promastigote.

Question 2

Most patients with toxoplasmosis that are not immunocompromised experience

Accepted Answer

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.

Question 3

Which is incorrect about malaria?

Accepted Answer

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. 
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.

Question 4

Describe the life cycle of Plasmodium and malaria epidemiology including: a) developmental forms and respective hosts/host cells, b) transmission, c) human disease and symptoms, d) treatment, and e) prevention.

Accepted Answer

The life cycle of Plasmodium, the parasi

Question 5

The active, feeding form of a protozoan is called the _____.

Accepted Answer

The answer of The active, feeding form of a protozoan...

Question 6

Giardiasis involves

Accepted Answer

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 these 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 these choices are correct.

Question 7

Strongyloides stercoralis

Accepted Answer

A) is a tapeworm. 
B) is ingested with food and does not migrate out of the intestine. 
C) rarely causes chronic infection. 
D) can cause a fatal disseminated disease in immunosuppressed patients. 
E) All of these choices are correct. 
A) is a tapeworm. 
B) is ingested with food and does not migrate out of the intestine. 
C) rarely causes chronic infection. 
D) can cause a fatal disseminated disease in immunosuppressed patients. 
E) All of these choices are correct.

Question 8

Which parasite is carried by Cyclops, an arthropod commonly found in still water?

Accepted Answer

A) Schistosoma mansoni 
B) Dracunculus medinesis 
C) Fasciola hepatica 
D) Taenia saginata 
E) Toxoplasma gondii 
A) Schistosoma mansoni 
B) Dracunculus medinesis 
C) Fasciola hepatica 
D) Taenia saginata 
E) Toxoplasma gondii

Question 9

Recent strategies for control and containing the spread of river blindness include

Accepted Answer

A) antibiotics to inhibit bacterial endosymbionts within Onchocerca volvulus. 
B) antihelmintic drugs such as ivermectin to destroy the larval worms. 
C) antiprotozoan drugs such as metronidazole. 
D) insecticides to decrease the blackfly population. 
E) filtering water through nylon sieves to remove Cyclops. 
A) antibiotics to inhibit bacterial endosymbionts within Onchocerca volvulus. 
B) antihelmintic drugs such as ivermectin to destroy the larval worms. 
C) antiprotozoan drugs such as metronidazole. 
D) insecticides to decrease the blackfly population. 
E) filtering water through nylon sieves to remove Cyclops.

Question 10

Write a brief definition of a parasite and parasitology giving specific examples of a fungus, protozoan, and helminth.

Accepted Answer

A parasite is an organism that lives on

Question 11

Which was the first disease found to be due to a protozoan that is introduced to humans by the bite of a hard body tick?

Accepted Answer

A) cryptosporidiosis 
B) babesiosis 
C) toxoplasmosis 
A) cryptosporidiosis 
B) babesiosis 
C) toxoplasmosis

Question 12

Trichinellosis includes all the following, except

Accepted Answer

A) humans are infected by ingesting encysted larvae. 
B) infection is associated with ingestion of undercooked pork or bear meat. 
C) the larvae migrate from intestines to blood and various body tissues. 
D) the first symptoms are diarrhea, nausea, fever, and pain. 
E) All of these choices are correct. 
A) humans are infected by ingesting encysted larvae. 
B) infection is associated with ingestion of undercooked pork or bear meat. 
C) the larvae migrate from intestines to blood and various body tissues. 
D) the first symptoms are diarrhea, nausea, fever, and pain. 
E) All of these choices are correct.

Question 13

Trichomonas vaginalis

Accepted Answer

A) does not produce cysts. 
B) causes urethritis in males. 
C) causes vaginitis with a foul-smelling discharge in females. 
D) has four flagella and an undulating membrane. 
E) All of these choices are correct. 
A) does not produce cysts. 
B) causes urethritis in males. 
C) causes vaginitis with a foul-smelling discharge in females. 
D) has four flagella and an undulating membrane. 
E) All of these choices are correct.

Question 14

Elephantiasis includes all the following, except

Accepted Answer

A) it is caused by filarial nematodes. 
B) the parasitic 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) it is caused by filarial nematodes. 
B) the parasitic 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.

Question 15

Diseases such as malaria, dengue fever, and Chagas'disease may be spread by any blood-sucking arthropod.

Accepted Answer

A) True 
 B)False

Question 16

In temperate zones, pinworms are the most common helminth infection.

Accepted Answer

A) True 
 B)False

Question 17

Adam, a once active normal three-year old boy, was experiencing increasing bouts of lethargy and began to regress developmentally.His mother scheduled an appointment with his pediatrician, who ordered a number of different blood tests.The most notable blood test result that piqued the physician's interest was a pronounced eosinophilia.Which of the following would be most likely to cause this abnormality?

Accepted Answer

A) infection with Giardia intestinalis 
B) infection with a parasitic helminth 
C) malaria 
D) infection with Cryptosporidium spp. 
E) viral infection 
A) infection with Giardia intestinalis 
B) infection with a parasitic helminth 
C) malaria 
D) infection with Cryptosporidium spp. 
E) viral infection

Question 18

While on a backpacking trip in Maine, Julie and her friends obtained their drinking water from several different pristine streams, adding one or two drops of bleach to ensure its safety.Several days later Julie began experiencing 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 the most likely cause of Julie's symptoms?

Accepted Answer

A) Entamoeba histolytica 
B) Giardia intestinalis 
C) E.coli O157:H7 
D) Schistosoma mansoni 
E) Toxoplasma gondii 
A) Entamoeba histolytica 
B) Giardia intestinalis 
C) E.coli O157:H7 
D) Schistosoma mansoni 
E) Toxoplasma gondii

Question 19

Schistosomiasis involves

Accepted Answer

A) a blood fluke. 
B) a life cycle stage which continues when eggs from humans enter water and develop into miracidia. 
C) snails which enable development of the parasite into cercaria. 
D) cercariae which penetrate hair follicles and pass to the blood and then the liver. 
E) All of these choices are correct. 
A) a blood fluke. 
B) a life cycle stage which continues when eggs from humans enter water and develop into miracidia. 
C) snails which enable development of the parasite into cercaria. 
D) cercariae which penetrate hair follicles and pass to the blood and then the liver. 
E) All of these choices are correct.

Question 20

Diseases transmitted by vectors include

Accepted Answer

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 and leishmaniasis. 
E) cryptosporidiosis and cyclosporiasis.

Exam 23: The Parasites of Medical Importance

The form lacking a free flagellum in the developmental stage of a hemoflagellate is called the

Most patients with toxoplasmosis that are not immunocompromised experience

Which is incorrect about malaria?

Describe the life cycle of Plasmodium and malaria epidemiology including: a) developmental forms and respective hosts/host cells, b) transmission, c) human disease and symptoms, d) treatment, and e) prevention.

The active, feeding form of a protozoan is called the _____.

Giardiasis involves

Strongyloides stercoralis

Which parasite is carried by Cyclops, an arthropod commonly found in still water?

Recent strategies for control and containing the spread of river blindness include

Write a brief definition of a parasite and parasitology giving specific examples of a fungus, protozoan, and helminth.

Which was the first disease found to be due to a protozoan that is introduced to humans by the bite of a hard body tick?

Trichinellosis includes all the following, except

Trichomonas vaginalis

Elephantiasis includes all the following, except

Diseases such as malaria, dengue fever, and Chagas'disease may be spread by any blood-sucking arthropod.

In temperate zones, pinworms are the most common helminth infection.

Schistosomiasis involves

Diseases transmitted by vectors include

The Main Themes of Microbiology

The Chemistry of Biology

Tools of the Laboratory: Methods of Studying Microorganisms

A Survey of Prokaryotic Cells and Microorganisms

A Survey of Eukaryotic Cells and Microorganisms

An Introduction to Viruses

Microbial Nutrition, Ecology, and Growth

An Introduction to Microbial Metabolism: the Chemical Crossroads of Life

Microbial Genetics

Genetic Engineering: a Revolution in Molecular Biology

Physical and Chemical Agents for Microbial Control

Drugs, Microbes, Host--The Elements of Chemotherapy

Microbe-Human Interactions: Infection and Disease

An Introduction to Host Defenses and Innate Immunities

Adaptive, Specific Immunity and Immunization

Disorders in Immunity

Procedures for Identifying Pathogens and Diagnosing Infections

The Gram-Positive and Gram-Negative Cocci of Medical Importance

The Gram-Positive Bacilli of Medical Importance

The Gram-Negative Bacilli of Medical Importance

Miscellaneous Bacterial Agents of Disease

The Fungi of Medical Importance

Introduction to Viruses That Infect Humans: the Dna Viruses

The Rna Viruses That Infect Humans

Environmental Microbiology

Applied and Industrial Microbiology

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