Entero 2 Flashcards
Within the species of Salmonella enterica are 6 subspecies:
• S. enterica subsp. enterica (also called subspecies I)
• S. enterica subsp. salamae (subspecies II)
• S. enterica subsp. arizonae (subspecies IIIa),
• S. enterica subsp. diarizonae (subspecies IIIb)
• S. enterica subsp. houtenae (subspecies IV),
• S. enterica subsp. indica (subspecies VI).
Within the S. enterica subsp. enterica (also called subspecies I) are 3 serotypes:
• Salmonella serotype Typhi
• Salmonella serotype Choleraesuis,
• Salmonella serotype Paratyphi
Salmonella spp.
IDENTIFICATION: BIOCHEMICAL CHARACTERISTICS
All species are motile except
S. serotype Pullorum and S. serotype Gallinarum
Salmonella spp.
IDENTIFICATION: BIOCHEMICAL CHARACTERISTICS
All produce gas except:
S. serotype Gallinarum and S. serotype Typhi
Salmonella spp.
IDENTIFICATION: BIOCHEMICAL CHARACTERISTICS
All produce H2S except:
S. serotype Paratyphi A
Salmonella spp.
IMVIC Reaction:
-+-+
IMVIC Reaction of S. serotype Typhi
-+–
Salmonella spp.
TSI
K/A + gas; with H2S
S. serotype Typhi TSI:
K/A, (-) gas, + H2S
Salmonella spp.
SPECIMEN IDENTIFICATION
1ST week of infection
BLOOD
Salmonella spp.
SPECIMEN IDENTIFICATION
2nd week of infection
STOOL
Salmonella spp.
SPECIMEN IDENTIFICATION
3rd week of infection
URINE
Other name of S. dysenteriae
Shiga bacillus
Other name for S. flexneri
Strong’s bacillus;
Flexner’s bacilli
Other name for S. boydii
Boyd’s bacilli;
Newcastle- Manchester’s bacilli
Other name for S. sonnei
Sonne-Ducal bacilli
Shigella Species:
S. dysenteriae (Group A)
S. flexneri (Group B)
S. boydii (Group C)
S. sonnei (Group D)
MOT: (4 Fs) of shigella
flies, fingers, food and feces
Shigella VIRULENCE FACTORS
Shiga toxin
Shigella ANTIGENIC STRUCTURE
Somatic O
Causative agent of Bacillary dysentery
S. dysenteriae type I
Characterized by: acute inflammatory colitis and boody diarhhea (blood, mucus and WBCs in stool)
Bacillary dysentery
IMVIC reaction of shigella:
v+–
TSI of shigella
K/A (-) gas; (-) H2S
