ENTEROBACTERIACEAE Flashcards
- Gram (-) bacilli
- facultative anaerobe, NS
- Ferments glucose
ENTEROBACTERIACEAE
TRUE PATHOGENS
Escherichia
Klebsiella
Enterobacter
2 Enzymes
Beta galactosidase - Major enzyme
Lactose permease - Non-pathogenic
Envelope/capsular antigen
K antigen
Somatic; heat stable
O antigen
Flagellar; heat labile
H antigen
Mostly motile
Normal flora of GIT known as colon bacillus
#1 cause of community acquired UTI
Escherichia coli
- Lesions called “attaching and effacing lesions”
- ‘’Infantile diarrhea’’
EPEC
‘’watery/ bloody diarrhea’’
EIEC
‘’watery/ bloody diarrhea’’
EIEC
Associated to diarrhea and UTI
EAEC
Associated to diarrhea and UTI
DAEC
- Diarrhea ‘’stacked-brick pattern’’
EAEC
’Montezuma’s revenge’’
‘’Traveller’s diarrhea’’
ETEC
‘’Grossly bloody diarrhea’’
EHEC
- Acute pyelonephritis
Uropathogenic E. coli (UPEC)
- Neonatal meningitis
Meningitis/sepsis-associated E. coli (MNEC)
- 4-methylumbelliferyl-beta-D-glucoronide
E. coli broth
(+) MUG test
- electric blue florescence under UV light
common name of K. pneumoniae
Friedlander’s bacillus
test for capsulated; K. pneumoniae is positive.
Neufeld Quellung
- Donovanosis
- STD; stains blue; intracellular organism
- Safety pin appearance
- Requires additional nutrients for growth
K. granulomatis
- Disease similar to K. pneumoniae
- heat labile; only indole (+)
K. oxytoca
- Environmental organism
K. planticola
cause fasciitis due to contaminated
powdered milk
Fish-eye appearance: pink mucoid
Enterobacter
