numbers 1-50

1.

1 point

25. All of the following are correct about Staphylococcus aureus except

it is the coagulase-positive species

most strains are resistant to penicillin and ampicillin.

. the body's most powerful defense against it lies in the T-cell response.

it causes furuncles, carbuncles and abscesses.

. carriers may be treated with antibiotics to clear them of the bacteria.

2.

1 point

49. Which type of medium is able to distinguish different species or types of microorganisms based on an observable change in the colonies or in the medium?

enumeration

differential

enriched

reducing

selective

3.

1 point

Amebiasis is a disease of the

brain and meninges

skin

intestines and often the liver

lung tissue

conjunctiva of the eye

4.

1 point

The highest incidence of histoplasmosis in the United States occurs in the

Southeast

Rocky Mountains

Southwest

East and Midwest

Northeast

5.

1 point

17. Streptococcus pneumoniae is

called the meningococcus

a gram positive diplococcus with a capsule.

a pathogen with endotoxin.

in the viridans group.

All of the choices are correct

6.

1 point

Amebiasis symptoms include

bloody, mucus-filled stools, fever, diarrhea, and weight loss.

urinary frequency and pain, and vaginal discharge

chills, fever, and sweating

sore throat, low-grade fever, and swollen lymph nodes

fever, swollen lymph nodes, and joint pain.

7.

1 point

32. All of the following can be transmitted by drinking contaminated water except

giardiasis

babesiosis

cyclosporiasis

cryptosporidiosis

balantidiasis

8.

1 point

Entamoeba histolytica is acquired by

All of the choices are correct

anal-oral sexual contact

contaminated food

ingestion of cysts of the pathogen.

contaminated water.

9.

1 point

20. The instillation of antibiotics in newborn's eyes will prevent ophthalmia neonatorum in newborns. This disease is caused by

Streptococcus pyogenes

Staphylococcus aureus.

Neisseria meningitidis.

Neisseria gonorrhoeae. E. Branhamella (Moraxella) catarrhalis

Neisseria gonorrhoeae.

10.

1 point

31. Which of the following causes serious congenital disease from transplacental transmission?

toxoplasmosis

giardiasis

trichomoniasis

balantidiasis

malaria

11.

1 point

23. Which chemical, produced by S. aureus, digests blood clots?

coagulase

penicillinase

toxic shock syndrome toxin

staphylokinase

hyaluronidase

12.

1 point

38. Transmission of the pathogen of leishmaniasis is by the

reduviid, "kissing," bug

phlebotomine (sand) fly

Anopheles mosquito

tsetse fly

hard bodied tick

13.

1 point

14. Staphylococci can be differentiated from streptococci by the

None of the choices are correct

coagulase test

Gram stain.

fermentation of mannitol

catalase test.

14.

1 point

45. Which of the following is essential for development of discrete, isolated colonies?

assay medium

selective medium

differential medium

solid medium

broth medium

15.

1 point

9. A common food intoxication is caused by enterotoxin-producing strains of

Staphylococcus saprophyticus.

Staphylococcus aureus

Staphylococcus epidermidis

Streptococcus pyogenes

Streptococcus agalactiae

16.

1 point

19. All of the following pertain to Neisseria meningitidis except

it is more easily transmitted in day care facilities, dorms, and military barracks

the reservoir is the nasopharynx of human carriers.

virulent factors include a capsule, pili, endotoxin, and IgA protease.

it is a common cause of bacterial pneumonia.

it causes a serious meningitis

17.

1 point

Trichomonas vaginalis

does not produce cysts

in females causes vaginitis with a foul-smelling discharge

All of the choices are correct

has four flagella and an undulating membrane

in males causes urethritis

18.

1 point

7. The bright red rash and fever of scarlet fever is due to

toxic shock syndrome toxin

hemolysins

exfoliative toxin

erythrogenic toxin

enterotoxins

19.

1 point

46. A pure culture contains only

one species of microorganism

a variety of species from the same genus.

a variety of microbes from one source.

bacteria.

20.

1 point

30. Which of the following is a sexually transmitted disease?

trichomoniasis

toxoplasmosis

giardiasis

malaria

balantidiasis

21.

1 point

18. Neisseria gonorrhoeae is

the cause of ophthalmia neonatorum.

All of the choices are correct

called the gonococcus.

virulent due to pili, and a protease that inactivates IgA.

the cause of gonorrhea.

22.

1 point

40. All of the following will kill Giardia except

All of the methods listed will kill it

boiling

ozone

chlorine in typical drinking water

iodine

23.

1 point

43. All of the following are examples of different types of microbiological media except

agar

broth.

petri dish

gelatin

enriched

24.

1 point

42. The Five I's of studying microorganisms include all of the following except

incubation

identification.

infection.

inoculation.

isolation.

25.

1 point

The enzyme that coagulates plasma is

staphylokinase

coagulase

hyaluronidase

catalase

Dnase

26.

1 point

10. This pathogen is the most common cause of neonatal pneumonia, sepsis, and meningitis in the United States

Staphylococcus aureus

Streptococcus pyogenes

Staphylococcus saprophyticus

Streptococcus agalactiae

Staphylococcus epidermidis

27.

1 point

All species of Staphylococcus

have capsules

lack spores

produce coagulase

All of the choices are correct

are motile

28.

1 point

47. A common medium used for growing fastidious bacteria is

mannitol salt agar

a reducing medium.

trypticase soy agar.

blood agar.

MacConkey medium

29.

1 point

22. Which chemical, produced by S. aureus is also known as "spreading factor"?

coagulase

hyaluronidase

toxic shock syndrome toxin

hemolysin

penicillinase

30.

1 point

11. This organism is associated with commonly causing urinary tract infections in sexually active young adult and adolescent females:

Streptococcus pyogenes

Staphylococcus epidermidis

Streptococcus agalactiae

Staphylococcus saprophyticus

Staphylococcus aureus

31.

1 point

16. The Group A streptococcal infection that has symptoms of fever, edema of skin near portal of entry, and an elevated red, hot vesicular lesion is

scarlet fever.

impetigo

necrotizing fasciitis.

erysipelas

None of the choices are correct

32.

1 point

41. Which is not correct about trichinosis?

It can be transmitted by eating undercooked pork.

It can be transmitted by eating bear meat.

A cure is not available once the larvae have encysted in muscles

The first symptoms mimic influenza

Only a few cases occur each year in the U.S.

33.

1 point

24. A patient has a suspicious skin infection and a culture is taken. Which media would be appropriate to select for Staphylococci?

mannitol salt agar

chocolate agar

nutrient agar

blood agar

MacConkey agar

34.

1 point

12. The most common site where carriers of Staphylococcus aureus carry this pathogen is

under the fingernails.

all over the skin.

intestines.

anterior nares (nostrils).

mouth.

35.

1 point

39. Schistosomiasis involves

All of the choices are correct

snails allow development into cercaria

cercaria enter hair follicles and pass to the blood and then the liver

eggs from humans enter water and develop into miracidium

a blood fluke a blood fluke a blood fluke a blood fluke a blood fluke a blood fluke a blood fluke.

36.

1 point

6. The toxin of Staphylococcus aureus strains that causes blisters and desquamation of skin in scalded skin syndrome is

exfoliative toxin

toxic shock syndrome toxin

enterotoxin

erythrogenic toxin

hemolysin

37.

1 point

50. For which bacterial genus is mannitol salt agar selective?

Staphylococcus

Salmonella

Streptococcus

Escherichia

Neisseria

38.

1 point

21. The majority of otitis media in children is mainly due to infection with

Staphylococcus saprophyticus

Branhamella (Moraxella) catarrhalis

Streptococcus pneumoniae

Streptococcus agalactiae.

Streptococcus pyogenes

39.

1 point

Most cases of toxoplasmosis in patients that are not immunocompromised have the following symptoms

chills, fever, and sweating

urinary frequency and pain, and vaginal discharge

sore throat, low grade fever, and swollen lymph nodes

fever, swollen lymph nodes, and joint pain

bloody, mucus-filled stools, fever, diarrhea, and weight loss

40.

1 point

34. The symptoms that occur in cyclic 48 to 72 hour episodes in a malaria patient are

urinary frequency and pain, and vaginal discharge

fever, swollen lymph nodes, and joint pain

sore throat, low grade fever, and swollen lymph nodes

chills, fever, and sweating

bloody, mucus-filled stools, fever, diarrhea, and weight loss

41.

1 point

8. Scarlet fever is caused by strains of

Streptococcus pyogenes

Streptococcus agalactiae

Staphylococcus saprophyticus

Staphylococcus aureus

Staphylococcus epidermidis

42.

1 point

48. A nutrient medium that has all of its chemical components identified and their precise concentrations known and reproducible, would be termed

complex.

reducing.

enriched.

enumeration.

synthetic

43.

1 point

28. The large intestines of pigs are the primary reservoir of the pathogen that causes

amebiasis and trichomoniasis

cryptosporidiosis and cyclosporiasis

balantidiasis

trypanosomiasis leishmaniasis

amebic meningoencephalitis.

44.

1 point

1. The terms used for the four levels of fungal infection include the following except

cutaneous

bloodborne

systemic

subcutaneous

superficial

45.

1 point

13. Infections caused by Staphylococcus aureus include all the following except

osteomyelitis.

pneumonia.

folliculitis.

furuncles and carbuncles.

sore throat.

46.

1 point

African sleeping sickness is caused by

Plasmodium falciparum

Isospora belli

Leishmania brasiliensis

Trypanosoma cruzi

Trypanosoma brucei

47.

1 point

15. Necrotizing fasciitis is

possibly caused by antibodies to Group A streptococci that cross-react with body tissues.

typically a sequelae of streptococcal pharyngitis.

also called impetigo

not treatable with antimicrobic drugs.

associated with strains of Streptococcus pyogenes producing destructive enzymes and toxins.

48.

1 point

29. Which of the following is a large ciliate?

Toxoplasma gondii

Giardia lamblia

Balantidium coli

Entamoeba histolytica

Naegleria fowleri

49.

1 point

Characteristics of Histoplasma capsulatum include

None of the choices are correct

it grows in moist soil, rich in nitrogen from bird and bat guano

it grows in dry, arid soil

it is a yeast with a capsule

it is a dermatophyte

50.

1 point

44. The term that refers to the purposeful addition of microorganisms into a laboratory nutrient medium is

immunization

contamination

inoculation

isolation.

infection.