Aerobic Gram Pos Bacteria Flashcards
- Tellurite reduction is used for the presumptive identification of
A. Bacillus anthracis
B Corynebacterium diphtheriae
C. Erysipelothrix rhusiopathiae
D. Staphylococcus saprophyticus
B
- Which of the following is associated with infections in humans often linked to deli meats and improperly pasteurized dairy products?
A Bacillus subtilis
B.Listeria monocytogenes
C. Leuconostoc
D. Streptococcus agalactiae
B
- The causative agent of “malignant A.
pustule” is
A.Bacillus anthracis
B .Corynebacterium ulcerans
C. Erysipelothrix rhusiopathiae
D. Listeria monocytogenes
A
- An infant was hospitalized with a severe, tender erythema. The child’s epidermis was loose, and large areas of skin could be peeled off. The condition described is most consistent with a clinical syndrome associated with
A.Streptococcus pyogenes
B. Staphylococcus aureus
C. Bacillus anthracis
D. Erysipelothrix rhusiopathiae
B
- Ethylhydrocupreine HCl susceptibility is a presumptive test for the identification of
A. Viridans streptococci
B. Streptococcus pyogenes
C. Streptococcus agalactiae
D. Streptococcus pneumoniae
D
50 Which of the following is catalase
negative?
A. Bacillus
B. Corynebacterium
C. Leuconostoc
D. Listeria
C
- Cystine-tellurite blood agar plates are
recommended for the isolation of
A . Corynebacterium diphtheriae
B. Streptococcus agalaciae
C. Streptococcus pyogenes
D. Group D streptococci
A
- The pulmonary form of anthrax is known as
A. Valley fever
B. Walking pneumonia
C. Farmers’ lung
D. Woolsorters disease
D
- Pleomorphic gram-positive bacilli Gram stain best describes
A. Bacillus anthracis
B. Bacillus subtilis
C. Listeria monocytogenes
DCorynebacterium pseudodiph theriticum
D
- Which one of the following diseases involves erythrogenic toxin?
A. Cutaneous anthrax
B. Diphtheria
CImpetigo
D Scarlet fever
D
- Which of the following is not associated
with Staphylococcus aureus?
A Endotoxin production
B. Clumping factor production
Deoxyribonuclease production
D. Hemolysin production
A
- Nocardia can be differentiated from Actinomyces based on
A. Nocardia being an obligate anaerobe
B. The partial-acid fast staining reaction
of Actinomyces
The production of sulfur granules in cases of nocardiosis
D. Nocardia being catalase positive
D
- A former species of Corynebacterium pathogenic for swine, horses, and cattle is also known to cause disease in compro mised hosts. This organism when grown on culture media produces pale pink colonies that help to presumptively
identify it as
A Arcanobacterium hemolyticum
B. Actinomyces naeslundii
Gardnerella vaginalis
Rhodococcus equi
D
- Growth in a 48-hour semisolid agar stab culture at room temperature reveals lateral filamentous growth away from the stab near the top of the medium. This observa ion is most characteristic of which organism?
A. Rhodococcus sp.
B. Corynebacterium urealyticum
C.Enterococcus faecalis
D .Listeria monocytogenes
D
- The beta-hemolysis produced by group A Streptococcus seen on the surface of a sheep blood agar plate is primarily the result of streptolysin
Streptolysin S
- When an infection due to Streptomyces is suspected, isolates can be separated from most other bacteria by
A. Heat shocking the culture
B. Incubating the culture at 25°C
C. Incubating the culture at greater than 37°C
D. Drying the specimen before inoculat ing the culture media
B
- The production of H2S is one characteris tic used to differentiate which of the
aerobic gram-positive bacilli?
A. Corynebacterium
B.Erysipelothrix
C. Lactobacillus
D. Nocardia
B
- Staphylococcus aureus, when present, could most likely be recovered from a stool sample if the primary plating
medium included
A Bismuth sulfite
B. Phenylethyl alcohol
C. Thiosulfate citrate bile salts sucrose
D. Xylose-lysine-desoxycholate
B
- On Tinsdale agar, colonies of Corynebacterium diphtheriae are
characterized by the observance of
A. Liquefaction of the agar surrounding the colonies on the medium
B. Opalescent colonies with a white precipitate in the surrounding agar
C. Black colonies on the culture medium surrounded by brown halos
D. Pitting of the agar medium surround ing the colonies
C
- Which of the following is associated with infections in humans often linked to deli meats and improperly pasteurized dairy products?
A .Bacillus subtilis
B.Listeria monocytogenes
C. Leuconostoc
D. Streptococcus agalactiae
B
- The causative agent of “malignant A.
pustule” is
A.Bacillus anthracis
B .Corynebacterium ulcerans
C. Erysipelothrix rhusiopathiae
D. Listeria monocytogenes
A
- The etiologic agent of the disease erysipelas is
A. Staphyloccus aureus
B.Streptobacillus moniliformis
C.Streptococcus agalactiae
D.Streptococcus pyogenes
D
- Loeffler’s serum medium is recommended
for the cultivation of
A. Abiotrophia sp.
B. Corynebacterium diphtheriae
C. Leuconostoc sp.
D. Streptococcus agalactiae
B
- Which of the following is the most commonly isolated species of Bacillus in opportunistio infections such as bacteremia, post-traumatic infections of the eye, and endocarditis?
A. B. circulans
B. B.cereus
C. B. licheniformis
D. B.subtilis
B
