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

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

Bile salts

2

O/H/K Antigen?
The somatic antigen in cell wall LPS

O Antigen

3

O/H/K Antigen?
Flagella proteins

H Antigen

4

Most common presentation of Enterobacteriaciae infection

diarrhea

5

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

Transduction

6

Appearance of Salmonella in Hektoen culture media

Green/blue colonies with black centers

7

4F's of Food Safety

Fingers
Feces
Flies
Foot

Flo

8

Probably the world’s most widespread zoonosis.

Leptospirosis

9

Temperature and PH for optimal growth of Leptospira

Temp: 28-32C, PH 7.2-7.6

10

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

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

11

Incubation period for Leptospira

1-2 weeks

12

most common clinical manifestations of leptospirosis

jaundice and conjunctival suffusion

13

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

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

substance injected to animal to create resistance to the disease

inoculum

15

A result of 2+ for Leptodipstick assay indicates:

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

Viruses transmitted by blood-sucking athropods from one
host to another during the viremic stage.

Arbovirus (ARthropod-BOrne) viruses

17

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

B.
Mosquitoes can be vectors.

18

Swahili for “Break-bone fever”

Dengue

19

3 protein molecules that form the Flaviviridae virus particle:

C, prM, E

20

Grade of DHF:
Spontaneous bleeding into the skin and elsewhere.

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)