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Flashcards in Enterobacteriaceae Deck (14)
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1

General Characteristics of Enteric Family

GNRs
Ferment glucose
Oxidase negative *
Reduce nitrate to nitrite
Motile *
Facultative anaerobes

2

The two major types of Enterics (clinical significance)

Opportunistic pathogens
Primary pathogens

3

Which genera of Enterobacteriaceae are primary pathogens?

Salmonella
Shigella
Yersinia

4

Gastrointestinal Escherichia coli types

ETEC
EPEC
EIEC
EHEC
DAEC
EAEC

5

Clinical types of E. coli

Uropathogenic
Gastrointestinal pathogens
Extraintestinal pathogens

6

Extraintestinal infections caused by E. coli?

Meningitis and septicemia
Most common in neonates and young children

7

Characteristics of Escherichia coli?

Lactose fermenters (NOT EIEC)
IMVC ++- -
Urease-
DNAse-
PAD-
H2S-
O, H, and K antigens
Beta-hemolytic

8

Disease caused by EPEC?

“Enteropathogenic”
Traveler’s diarrhea
LT and ST toxins

9

Disease caused by EIEC?

“Enteroinvasive”
Dysentery
Stool with pus, mucus, and blood
*NLF and nonmotile
*Lysine decarboxylase -

10

Infection caused by EPEC?

“Enteropathogenic”
Infantile diarrhea
Adhesions
Mucus diarrhea NO blood
Vomiting

11

Infections caused by EHEC?

“Enterohemorrhagic”
E. coli O157H17
Hemorrhagic diarrhea
HUS
Verotoxin 1/2 or “shigatoxin” (STEC)
Bloody and mucus diarrhea with no pus
*Non-sorbitol fermenting

12

Characteristics of Klebsielleae

Opportunistic/nosocomial
H2S -
Urease -
IMVC - - ++
Members: Enterobacter, Serratia, Klebsiella

13

Klebsiella genera unique characteristic?

NONMOTILE

14

Clinically significant Klebsiella species and infections?

K. pneumoniae: LRT, UTI, liver abscess, and wound
K. oxytoca: indole +