Pathogenic Bacteriology Discussion Assignment

Pathogenic Bacteriology Discussion Assignment
Pathogenic Bacteriology Discussion Assignment
1. A staphylococcus which is part of the normal flora of the
human skin is
A. S. aerogenes
B. S. aureus
C. M. tetragenus
D. S. citreus
E. S. albus
2. Which of the following enzymes activates the plasma plasminogen system?
DNase Sea Cogulase
3. All of the following characteristics describe the organism
that has been shown to be responsible for Legionnaires’
disease EXCEPT a, si
it is a gram-negative bacillus
it measures 0.5—0.7 wm in breadth x 2-3 wm in length
it is frequently fusiform in shape
it is a gram-positive bacillus
oe cae is is not acid-fast
56 / Microbiology
Pathogenic Bacteriology Discussion Assignment
5.The organism most commonly causing subacute bacterial
endocarditis is
B-hemolytic streptococcus
a-hemolytic streptococcus Bt Sa) ie gram-negative organisms resistant to penicillin
S. pneumoniae can best be differentiated from other a-hemolytic streptococci by
Gram stain
type of hemolysis
clinical disease
growth characteristics Pees eee bile solubility
Figure 5
Pathogenic Bacteriology / 57
The organism shown in Figure 5 is found intracellularly as
gram-negative diplococci in a stained smear of urethral discharge. It is probably
N. gonorrhoeae
V. cholerae
H. ducreyi
C. trachomatis
none of the above
The major difference between pneumococcal pneumonia
and pneumonia due to Friedlander’s bacillus (K. pneumonide) is
the greater incidence of Friedlander’s — bacillus
low case-fatality rate of pneumonia due to Friedlander’s
the greater tendency to cause necrotic lesions in Friedlander’s pneumonia
absence of lung damage in Friedlander’s pneumonia
the efficacy of penicillin in Friedlander’s pneumonia
The average case of gastroenteritis of Salmonella origin is
associated with
Pathogenic Bacteriology Discussion Assignment
A. short incubation, vomiting, and diarrhea
a prolonged course with septicemia
a long incubation period with diarrhea but no vomiting
a disease resembling typhoid fever
true intoxication
When cultured on a solid medium, M. tuberculosis appears
dry and granular
The cholera vibrio
is strongly anaerobic
grows best at 25°C
has a marked tolerance for alkaline pH
grows over a wide range
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