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Chapter 18 multiple choice questions and matching.

Which of the following is/are a pyogenic coccus/cocci?

A) Streptococcus C) Neisseria
B) Staphylococci D) All of these

D) All of These

The Coagulase test is used to differentiate Staphylococcus aureus from?

A) Other Staphylococci
B) Streptococci
C) micrococci
D) enterococci

A) Other Staphylococci

The symptoms in scarlet fever are due to?

A) Streptolysin
B) coagulase
C) erythrogenic toxin
D) alpha - toxin

C) erythrogenic toxin

The most severe streptococcal diseases are caused by?

A) group B streptococci
B) group A streptococci
C) pneumococci
D) enterococci

B) group A streptococci

Rheumatic fever damages the _______ and glomerulonephritis damages the ________.

A) skin, heart
B) joints, bone marrow
C) heart valves, kidney
D) brain, kidney

C) heart valves, kidney

_______ hemolysis is the partial lysis of red blood cells due to bacterial hemolysins.

A) Gamma -
B) Alpha -
C) Beta -
D) Delta -

B) Alpha -

Viridans streptococci commonly cause

A) pneumonia
B) meningitis
C) subacute endocarditis
D) Otitis media

C) subacute endocarditis

Which of the following strains of pathogens has the lowest incedence?


Otitis media is a/an _________ infection often caused by _________

A) bone, staphylococcus aureus
B) eye, N. gonorrhoeae
C) middle ear, Streptococcus pneumoniae
D) brain, N. meninginitis

C) middle ear, Streptococcus pneumoniae

Which genus of bacteria has pathogens that can cause blindness?

A) Streptococcus
B) Staphylococcus
C) Neisseria
D) Branhamella

C) Neisseria

An important test for identifying Neisseria is?

A) Production of oxidase
B) Production of Catalase
C) Sugar fermentation
D) beta - hemolysis

A) production of oxidase

A complication of genital gonorrhea in both men and women is?

A) infertility
B) pelvic inflammatory disease
C) arthritis
D) blindness

A) infertility

What virulence factor is associated with the development of skin hemorrhages in meningitis?

A) skin invasion by N. meningitidis
B) blood clots
C) erysipelas
D) endotoxins in the blood

D) Endotoxins in the blood

Which infectious agent of those covered in chapter 18 would most likely be acquired from a contaminated doorknob?

A) Staphylococcus aureus
B) Streptococcus pyogenes
C) Neisseria meningitidis
D) Streptococcus pneumoniae

A) Staphylococcus aureus

Which of the following effects is/are caused by formation of an infectious biofilm?

A) disseminated infection
B) failure of drug therapy
C) colonization of tissues
D) a and b
E) b and c
F) all of these

F) All of these


a boil


focal infection of long bones


enzyme of pathogens S. aureus

erythogenic toxin

cause of scarlet fever symptoms

rheumatic fever

long term sequelae of strep throat

beta hemolysis

complete red blood celll lysis


solidification of lung alveoli

viridans streptococci

cause of tooth abscesses


cutaneous infestion of group A streps


heart colonization of oral sreps


substance involved in heart valve damage


enzyme that dissolves clots

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