Filters
Question type
Study Flashcards

Which of the following is the drug of choice for treating most streptococcal infections?


A) Erythromycin
B) Cephalothin
C) Penicillin
D) Gentamicin

Correct Answer

verifed

verified

What organism on sheep blood agar (SBA) has colonies that are small and transparent,surrounded by a wide zone of b-hemolysis?


A) Streptococcus agalactiae
B) Streptococcus pyogenes
C) Enterococcus
D) Viridans strep

Correct Answer

verifed

verified

What disease is produced by group A streptococci that is characterized by a rapidly progressing inflammation and necrosis of the skin,subcutaneous fat,and fascia?


A) Erysipelas
B) Scarlet fever
C) Necrotizing fasciitis
D) Streptococcal toxic shock syndrome

Correct Answer

verifed

verified

What test can be used to differentiate S.agalactiae from other b-hemolytic streptococci?


A) Bacitracin
B) Hippurate hydrolysis
C) PYR
D) Optochin

Correct Answer

verifed

verified

Most doctors' offices use the rapid throat swab methods to identify Streptococcus pyogenes.If the test is positive,the physician treats the patient.What should happen if the test is negative?


A) The physician should treat the patient to be safe.
B) The physician should perform a throat culture.
C) The physician should repeat the rapid strep tests.
D) None of the above.

Correct Answer

verifed

verified

What causes the red spreading rash in scarlet fever?


A) Hyaluronidase
B) Streptolysin O
C) Streptococcal pyrogenic exotoxins
D) Streptolysin S

Correct Answer

verifed

verified

What organism on sheep blood agar (SBA) has grayish white colonies surrounded by a small zone of b-hemolysis?


A) Viridans strep
B) Enterococcus
C) Streptococcus pyogenes
D) Streptococcus agalactiae

Correct Answer

verifed

verified

Physiologic classification of streptococci divide the species into all the following groups EXCEPT:


A) Pyogenic streptococci
B) Lactococci
C) b-Hemolytic streptococci
D) Enterococci

Correct Answer

verifed

verified

What test is used as a presumptive identification of Streptococcus pneumoniae?


A) Optochin
B) Bacitracin
C) PYR
D) Hippurate hydrolysis

Correct Answer

verifed

verified

What is the drug of choice to treat Streptococcus pneumoniae?


A) Erythromycin
B) Penicillin
C) Zithromax
D) Chloramphenicol

Correct Answer

verifed

verified

The atmospheric conditions best suited to grow streptococci and enterococci are:


A) Room air
B) Oxygen-free atmosphere
C) High carbon dioxide concentration
D) Low carbon dioxide concentration

Correct Answer

verifed

verified

What is the drug of choice to treat group A streptococci when the patient cannot tolerate penicillin?


A) Penicillin
B) Erythromycin
C) Gentamicin
D) Cefoxitin

Correct Answer

verifed

verified

What is the cellular structure that Streptococcus pyogenes relies on for its virulence?


A) Peptidoglycan
B) Lipopolysaccharide
C) S antigens
D) M proteins

Correct Answer

verifed

verified

What two tests have been mainstays in identification schemes for the non-b-hemolytic,catalase-negative,gram-positive cocci?


A) Bacitracin and PYR
B) Hippurate hydrolysis and Optochin
C) Nitrate and PYR
D) Bile esculin and salt tolerance

Correct Answer

verifed

verified

Two serious complications of an infection with group A streptococcal disease are:


A) Toxic shock syndrome and scarlet fever
B) Gangrene and rheumatic fever
C) Acute glomerulonephritis and necrotizing fasciitis
D) Acute glomerulonephritis and rheumatic fever

Correct Answer

verifed

verified

Streptococcus agalactiae is a significant cause of?


A) Pharyngitis
B) Cystitis
C) Invasive disease of the newborn
D) Vaginitis

Correct Answer

verifed

verified

Why do Streptococcus pneumoniae colonies on sheep blood agar (SBA) appear like a coin-raised edges and a depressed center?


A) The older growth at the center is smaller due to lack of nutrients.
B) The newer growths on the outside of the colony undergo the Quellung reaction.
C) The older growth at the center is killed due to autolysis.
D) The newer growth has a thicker capsule, therefore it appears raised.

Correct Answer

verifed

verified

Showing 21 - 37 of 37

Related Exams

Exam 1

Bacterial Cell Structure, physiology, Metabolism, and Genetics

48 Questions

Exam 2

Host-Parasite Interaction

45 Questions

Exam 3

Laboratory Role in Infection Control

29 Questions

Exam 4

Control of Microorganisms

69 Questions

Exam 5

Performance Improvement in the Microbiology Laboratory

39 Questions

Exam 6

Specimen Collection and Processing

57 Questions

Exam 7

Microscopic Examination of Infected Materials

34 Questions

Exam 8

Use of Colonial Morphology for the Presumptive Identification of Microorganisms

37 Questions

Exam 9

Biochemical Identification of Gram-Negative Bacteria

55 Questions

Exam 10

Immunodiagnosis of Infectious Diseases

56 Questions

Exam 11

Applications of Molecular Diagnostics

50 Questions

Exam 12

Antibiotic Mechanisms of Action and Resistance

44 Questions

Exam 13

Antimicrobial Susceptibility Testing

85 Questions

Exam 14

Staphylococci

34 Questions

Exam 16

Aerobic Gram-Positive Bacilli

45 Questions

Exam 17

Neisseria Species and Moraxella Catarrhalis

31 Questions

Exam 18

Haemophilus and Other Fastidious Gram-Negative Bacilli

29 Questions

Exam 19

Enterobacteriaceae

30 Questions

Exam 20

Vibrio,aeromonas,plesiomonas and Campylobacter Species

27 Questions

Exam 21

Nonfermenting and Miscellaneous Gram-Negative Bacilli

28 Questions

Exam 22

Anaerobes of Clinical Importance

34 Questions

Exam 23

Spirochetes

25 Questions

Exam 24

Chlamydia and Rickettsia

21 Questions

Exam 25

Mycoplasma and Ureaplasma

20 Questions

Exam 26

Mycobacterium Tuberculosis and Other Nontuberculosis Mycobacteria

33 Questions

Exam 27

Medically Significant Fungi

26 Questions

Exam 28

Diagnostic Parasitology

19 Questions

Exam 29

Clinical Virology

40 Questions

Exam 30

Agents of Bioterror

33 Questions

Exam 31

Biofilms: Architects of Disease

27 Questions

Exam 32

Upper and Lower Respiratory Tract Infections

33 Questions

Exam 33

Skin and Soft Tissue Infections

31 Questions

Exam 34

Gastrointestinal Infections and Food Poisoning

33 Questions

Exam 35

Infections of the Central Nervous System

26 Questions

Exam 36

Bacteremia and Sepsis

30 Questions

Exam 37

Urinary Tract Infections

31 Questions

Exam 38

Genital Infections and Sexually Transmitted Diseases

21 Questions

Exam 39

Infections in Special Populations

16 Questions

Exam 40

Zoonotic Diseases

20 Questions

Exam 41

Ocular Infections

32 Questions

Show Answer