Micro 6 - Intro To Gram Negative Bacteria Flashcards Preview

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Flashcards in Micro 6 - Intro To Gram Negative Bacteria Deck (47)
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1

Which G(-) cocci is a maltose fermenter?

N.meningitids.

2

Which G(-) cocci is a maltose nonfermenter?

N.gonorrhoeae.

3

What are 4 important Coccoid Rods?

H.influenzae, B.pertussis, Pasteurella, Brucella.

4

Which three G(-) rods are fast lactose fermenters?

Klebsiella, E.coli, Enterobacter.

5

Which two G(-) rods are lactose slow fermenter?

Citrobacter, Serratia, Others.

6

Which three G(-) rods are lactose nonfermenter and oxidase negative?

Shigella, Salmonella, Proteus.

7

Which G(-) rod is a lactose nonfermenter and oxidase positive?

Pseudomonas.

8

Which G(-) bacteria that is oxidase positive has a curved shape grows in 42C?

Campylobacter jejuni (helical or Z shaped).

9

Which G(-) bacteria that is oxidase positive has a curved shape and grows in alkaline media?

Vibrio cholerae (comma-shaped).

10

What are three important G(-) Cocci?

N.meningitidis, N.gonorrhoeae, Moraxella catarrhalis.

11

What are three descriptions of Neisseria species?

G(-) diplococci, ferment glucose, IgA protease.

12

What can Neisseria Gonococci cause?

Urethritis, PID, STI, Septic arthritis, conjunctivitis (newborns thru the birth canal).

13

What are two descriptions of Neiseeria Gonococci?

Maltose non-fermenter, No polysaccharide capsule.

14

What is the first line treatment for Neisseria Gonococci? Second line?

First line is Ceftriaxone. Second line is Azithromycin.

15

What is the mode of transmission of Neisseria meningococci that Neisseria gonococci does not have?

N.meningococci can be transmitted by respiratory secretions. N.gonococci is transmitted sexually or by birth canal.

16

What syndrome can N.meningococci cause?

Waterhouse-Friderichsen syndrome (adrenal hemorrhage).

17

What is the treatment for Neisseria Meningococci?

Ceftriaxone. Penicllin G only if it is confirmed by culture and sensitivity confirmation that it is going to work.

18

What is the prophylaxis treatment for Neisseria Meningococci?

Rifampin, ciprofloxacin, or ceftriaxone. You do not wait for culture results.

19

What type of bacteria is Haemophilus influenzae?

G(-) coccoid rod or coccobacilli.

20

What disease can Haemophilus influenzae cause?

Epiglottitis (in children, it can cause the "sniffing dog" position, because they are trying to open their airway to breath better, "thumbs up" on Xray), meningitis, otitis media, sinusitis, pneumonia.

21

How can we culture Haemophilus Influenzae?

Chocolate agar with factor V and X.

22

What is the treatment for Haemophilus influenzae?

Ceftriaxone.

23

What is the prophylaxis treatment for Haemophilus influenzae?

Rifampin.

24

What does Haemophilus ducreyi cause?

Causes a chancroid, a genital ulcer that is painful and solitary.

25

What type of bacteria is Legionella pneumophila?

G(-) rod but stains very poorly so a silver stain is needed.

26

What is needed to culture Legionella pneumophila?

You need a charcoal and yeast extract with iron and cystine. [French Legionare with a silver helmet, with a charcoal fire, has an iron dagger and he is no sissy].

27

What is the treatment for Legionella pneumophila?

Erythromycin or other macrolides.

28

What disease does Legionella pneumophila cause?

Legionnaires' disease, a severe pneumonia with fever. Or it can cause Pontiac fever, a flu-like disease.

29

What is the infection route of Legionella pneumophila?

It is transmitted in aerosol transmission from a body of water (airconditioner infected in an old barracks). There is no person-to-person transmission.

30

How can we diagnose Legionella pneumophila?

Presence of antigen in the urine.