Lec 07 Microbiology of Selected Bacteria and Viruses Flashcards Preview

OS 217 Infectious Diseases > Lec 07 Microbiology of Selected Bacteria and Viruses > Flashcards

Flashcards in Lec 07 Microbiology of Selected Bacteria and Viruses Deck (20)
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1
Q

MacConkey agar is a selective media because it targets only G+ and recovers G- bacteria thru the presence of:

A

Bile salts

2
Q

O/H/K Antigen?

The somatic antigen in cell wall LPS

A

O Antigen

3
Q

O/H/K Antigen?

Flagella proteins

A

H Antigen

4
Q

Most common presentation of Enterobacteriaciae infection

A

diarrhea

5
Q

process by which DNA is transferred from one bacterium to another by a virus

A

Transduction

6
Q

Appearance of Salmonella in Hektoen culture media

A

Green/blue colonies with black centers

7
Q

4F’s of Food Safety

A

Fingers
Feces
Flies
Foot

Flo

8
Q

Probably the world’s most widespread zoonosis.

A

Leptospirosis

9
Q

Temperature and PH for optimal growth of Leptospira

A

Temp: 28-32C, PH 7.2-7.6

10
Q

True of leptospires:

a. Uses long chain fatty acids as source of energy
b. Organic matter for nitrogen source
c. Both
d. Neither

A

a.

They can process amino acids or carbohydrates as nitrogen source. Just ammonium salts. So b is false.

11
Q

Incubation period for Leptospira

A

1-2 weeks

12
Q

most common clinical manifestations of leptospirosis

A

jaundice and conjunctival suffusion

13
Q

True of laboratory diagnosis of leptospirosis:

a. urine specimen on the 3rd weeks inoculated unto 
liquid medium
b. IgM detected at the end of 1st week
c. Both
d. Neither
A

d. Neither
Urine specimen gathered at 2-6 weeks sa semisolid medium + neomycin sulfate
Yung IgM at end of first week, parang sa typhoid yun.

14
Q

substance injected to animal to create resistance to the disease

A

inoculum

15
Q

A result of 2+ for Leptodipstick assay indicates:

A

that there is evidence of recent leptospirosis.

1+ = assay should be taken at a later time/ re-examination to look for an increased amount of antibodies.

16
Q

Viruses transmitted by blood-sucking athropods from one

host to another during the viremic stage.

A

Arbovirus (ARthropod-BOrne) viruses

17
Q

True of Arthropod borne viruses:
A. Blood sucking arthropods are the vectors particularly
ticks
B. The vectors are infected throughout their lives without
signs of damage
C. Both
D. Neither

A

B.

Mosquitoes can be vectors.

18
Q

Swahili for “Break-bone fever”

A

Dengue

19
Q

3 protein molecules that form the Flaviviridae virus particle:

A

C, prM, E

20
Q

Grade of DHF:

Spontaneous bleeding into the skin and elsewhere.

A

Grade II

Grade I
- Bruising and (+) torniquet test in persons
with fever (20 or more petechiae per 1 inch2)
Grade II
- Spontaneous bleeding into the skin and elsewhere
Grade III
- Clinical evidence of shock
Grade IV
- Severe shock: blood pressure and pulse cannot be detected

o Note: Grades III & IV = ―Dengue

Syndrome (DSS)