Bacteria

Question 1

What is Enterobacteriaceae

Answer 1

A classification of more than 15 different bacteria, including klebsiella, enterobacter, serratia, proteus and escherichia.

Question 2

What are some characteristics of enterobacteriaceae?

Answer 2

gram negative rod: yes
facultative anaerobes: yes
ferment glucose: yes
normal inhabitants of man and animals

Question 3

E. Coli

Answer 3

gram negative rod: yes
facultative anaerobe: yes
ferments: lactose (different from shigella and salmonella)
virulence factor: pili, capsule, exotoxins, O157:H7 > HUS
plate: pink on MacConkey
indole: yes
notes: most common cause of UTI by a lot!

Question 4

What is a complicated UTI?

Answer 4

observed in elderly patients with structural deficiencies such as prostatic hypertrophy, catheters, or vesiculoureteral abnormalities.

Question 5

Kelbsiella

Answer 5

gram negative rod:  yes
facultative anaerobe:  yes
ferments:  lactose
plate:  pink on MacConkey
notes: indole negative

Question 6

Serratia

Answer 6

gram negative rod:  yes
facultative anaerobe:  yes
ferments:  
plate:
notes:  makes red pigment when plated (not on MacConkey)

Question 7

Proteus

Answer 7

gram negative rod:  yes
facultative anaerobe:  
ferments:  non-lactose fermenter
plate:  colorless colonies on MacConkey
notes:  swarming on blood agar

Question 8

Pseudomonas Aeruginosa

Answer 8

gram negative rod:  yes
facultative anaerobe: NO... AEROBIC 
ferments:  GLUCOSE
plate:  plates blue on MacConkey
notes:  loves water (Silia), cystic fibrosis, burn victims, long stays in ICU are especially at risk, fluorescence under UV radiation

Question 9

Enterococcus

Answer 9

• gram + cocci
• catalase -
• can grow in crazy pH and 6.5% NaCl broth

Question 10

Candida sp.

Answer 10

• fungal pathogen
• neither gram + or gram -
• found on pts who recently finished Abx