Medical Microbiology Chapter 14

Protozoan parasites are

A. Multicellular

B. Prokaryotic

C. Macroscopic

D. Unicellular

E. Worms

D. Unicellular

Plasmodium falciparum

A. Causes sleeping sickness

B. Is a helminth

C. Causes the mildest form of malaria

D. Is the most dangerous of the malaria-causing parasites

E. Causes dysentery

D. Is the most dangerous of the malaria-causing parasites

Which of the following invade the blood and cause chronic illness?

A. Rhizopods

B. Flagellates

C. Ciliates

D. Cestodes

B. Flagellates

Protozoan parasites can be all of the following except

A. Aerobic

B. Facultatively anaerobic

C. Anaerobic

D. Heterotrophic

C. Anaerobic

Sexual reproduction in protozoans is called

A. Schizogony

B. Binary fission

C. Budding

D. Gametogony

D. Gametogony

The body of a worm is covered by a

A. Cell wall

B. Membrane

C. Cuticle

D. Scolex

E. None of the above

C. Cuticle

Nematodes are

A. Tape worms

B. Flukes

C. Roundworms

D. A type of fungus

E. Single-celled eukaryotes

C. Roundworms

Trematodes are

A. Tapeworms

B. Flukes

C. Roundworms

D. A type of fungus

E. Cestodes

B. Flukes

The severity of a helminth infection is directly related to

A. The type of helminth

B. A preexisting bacterial infection

C. The size of the worm

D. The number of worms that are present

D. The number of worms that are present

The organism that causes malaria is transmitted by

A. The bite of a fly

B. The bite of a tick

C. The bite of a mosquito

D. The respiratory system

E. The fecal-oral route of contamination

C. The bite of a mosquito

The intermediate host for Plasmodium species is

A. A fly

B. A mosquito

C. A human

D. A tick

E. There is no intermediate host

C. A human

Merozoites of Plasmodium are found in

A. The saliva of a mosquito

B. The human intestinal tract

C. The intestinal tract of a mosquito

D. Human hepatocytes

E. None of the above

D. Human hepatocytes

All of the following are true about flagellates except

A. They are widespread in nature

B. They use flagella for locomotion

C. They require an intermediate host for transmission

D. All flagellates cause disease in humans

D. All flagellates cause disease in humans

Enterobius vermicularis is a

A. Tapeworm

B. Cestode

C. Trematode

D. Pinworm

E. None of the above

D. Pinworm

Which of the following systems in a parasitic helminth is not greatly reduced compared with free-living helminths?

A. Nervous system

B. Digestive system

C. Locomotion

D. Reproductive system

E. All are reduced

D. Reproductive system

Transmission of helminthic diseases to humans is usually by

A. The genitourinary route

B. The respiratory route

C. Vectors

D. The gastrointestinal route

E. All of the above

D. The gastrointestinal route

Cercariae, metacercaria, miracidia, are stages in the life cycle of

A. Sporozoans

B. Nematodes

C. Cestodes

D. Trematodes

D. Trematodes

Which one of the following does not belong with the others?

A. Entamoeba

B. Trypanosoma

C. Cryptosporidium

D. Giardia

E. Plasmodium

C. Cryptosporidium

(Technically none according to Packard)

What do tapeworms eat?

A. Intestinal bacteria

B. Intestinal contents

C. Red blood cells

D. Host tissues

E. All of the above

B. Intestinal contents

Ringworm is caused by a

A. Protozoan

B. Nematode

C. Trematode

D. Cestode

E. Fungus

E. Fungus

Mycology is the study of

A. Parasites

B. Worms

C. Fungi

D. Insects

E. The structure of bacterial colonies

C. Fungi

Fungal plasma membranes contain

A. Peptidoglycan

B. Chains of N-acetylglucosamine

C. Cholesterol

D. Ergosterol

E. Mannan

D. Ergosterol

Fungal cell walls contain

A. Mannon

B. Ergosterol

C. Glucan

D. A and C

E. B and C

D. A and C

The branching structures seen in fungi are called

A. Spores

B. Conidia

C. Hyphae

D. Blastoconidia

E. None of the above

C. Hyphae

Superficial mycoses

A. Involve tissue destruction

B. Are systemic infections

C. Are associated with hair shafts

D. Are infections of the liver

E. Are infections of the intestines

C. Are associated with hair shafts

All of the following are true about mucocutaneous candidiasis except

A. It is caused by Candida albicans

B. It is an infection of the mucous membranes

C. It can be seen as thrush

D. It is a deep mycosis

E. It can be seen as vulvovaginitis

D. It is a deep mycosis

Tinea capitis is

A. A subcutaneous mycosis

B. A systemic infection

C. A form of ringworm

D. Found on the feet and between the toes

C. A form of ringworm

Successful host defense against fungal infection

A. Is restricted to phagocytosis

B. Is restricted to the humoral antibody response

C. Is restricted to the T cell response of adaptive immunity

D. Is a combination of phagocytosis and the production of antibody

E. Is a combination of phagocytosis, the production of antibody, and the T cell response

E. Is a combination of phagocytosis, the production of antibody, and the T cell response

The most commonly seen yeast infections are caused by

A. Histoplasma

B. Aspergillus

C. Penicillium

D. Saccharomyces cerevisiae

E. Candida albicans

E. Candida albicans