11. Family Neisseriaceae Flashcards Preview

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Flashcards in 11. Family Neisseriaceae Deck (27):
1

Microscopic appearance of the family Neisseriaceae

Gram-negative diplococci

2

Oxidase reaction of the family Neisseriaceae

Oxidase positive

3

Catalase reaction of the family Neisseriaceae

Catalase positive (most)

4

Neisseria spp. that is catalase negative

Neisseria elongate

5

MOT of N. gonorrhoeae

Sexually transmitted

6

Presentation of gonorrhoea in males

Acute urethritis with dysuria and urethral discharge

7

Presentation of gonorrhoea in females

Colonizes the endocervix causing:
Vaginal discharge
Dysuria
Abdominal pain
May lead to pelvic inflammatory disease

8

Selective media for Neisseria gonorrhoea

Modified Thayer-Martin
Chocolate agar

9

Incubation requirements of N. gonorrhoea

3-7% CO2
35-37°C

(Humidity important)

10

Microscopic appearance of N. gonorrhoea

Gram-negative diplococci (some may appear as tetrads)

11

Colony morphology of N. gonorrhoea on Chocolate agar

Small
Gray
Translucent
Raised colonies

12

Colony morphology of N. gonorrhoea on blood agar

N. gonorrhoea does not grow on blood agar

13

Catalase reaction of N. gonorrhoea

Catalase positive

14

Oxidase reaction of N. gonorrhoea

Oxidase positive

15

Carbohydrate oxidized by N. gonorrhoea

Glucose

16

Agar used to determine the sugar oxidized by N. gonorrhoea

Cystine Trypticase agar (CTA)

17

Specimens for N. meningitidis diagnosis

CSF
Blood
Skin scraping

18

Most important strains of N. meningitidis clinically

A
B
C
Y
W135

19

Amount of CSF needed for diagnosis of N. meningitidis infection

Greater than 1 mL CSF

20

Yes/No. Can the CSF specimen for N. meningitidis diagnosis be refrigerated?

No

21

Microscopic characteristics of N. meningitidis

Gram-negative diplococci found intracellularly and extracellularly

22

Media used to grow N. meningitidis

Sheep blood agar
Chocolate agar
Thayer-Martin agar

23

Catalase reaction of N. meningitidis

Catalase positive

24

Oxidase reaction of N. meningitidis

Oxidase positive

25

Carbohydrates oxidized by N. meningitidis on CTA

Glucose
Maltose

26

Emumerate other nonpathogenic Neisseria spp.

N. lactamica
N. flavescens
N. sicca

27

Oxygen requirements of the family Neisseriaceae

Aerobic