BACTE LEC - Entero Part 3 Flashcards
principle of phenylalanine test
Deamination of phenylalanine to phenylpyruvic acid
positive rxn of the phenylalanine test
Positive (green color in the syneresis fluid
ONPG meaning
O-nitrophenyl-beta-D- galactopyranoside
test for Slow or late lactose fermenter
O-nitrophenyl-beta-D-galactopyranoside
only one that is ONPG positive
Salmonella serotype
Salmonella arizonae
rxn of citrobacter in ONPG
+
E. coli is a normal flora of the
GI tract
Closely related to Shigella (DNA homology)
Escherichia coli
“Montezuma’s revenge” “turista” Traveller’s diarrhea
Enterotoxigenic E. coli (ETEC)
diseases caused by ETEC
“Montezuma’s revenge”
“turista”
Traveller’s diarrhea
E. coli strain
Severe epidemic diarrhea = cholera Fever, headache, vomiting, chills
Enterotoxigenic E. coli (ETEC)
E. coli strain
Disease = Shigellosis
Enteroinvasive E. coli (EIEC)
Invasion of intestinal epithelium
E. coli strain
Enteroinvasive E. coli (EIEC)
E. coli strain
Fever, cramps, bloody stool w/ RBCs, neutrophil and mucus
Enteroinvasive E. coli (EIEC)
Verotoxin causes what diarrhea
bloody diarrhea
Sorbitol negative SMAC
Enterohemorrhagic E. coli (EHEC)
Verotoxic E. coli (VTEC)
0157 H7

Enterohemorrhagic E. coli (EHEC)
E. coli strain
Hemolytic uremic syndrome
Enterohemorrhagic E. coli (EHEC)
E. coli strain
Hemorrhagic colitis
Enterohemorrhagic E. coli (EHEC)
strain number of Enterohemorrhagic E. coli (EHEC)
0157 H7
Resembles E. coli
Lactose negative & nonmotile
Shigellosis (bacillary dysentery)
Shigella
Shigella: lactose (-) or (+)?
Lactose negative
Motility of Shigella
nonmotile
disease caused by shigella
shigellosis
bacillary dysentery
shigellosis
with fishy odor
shigella
enteric bacteria which causes Bloody, mucoid, diarrheic stool w/ pus cells & fishy odor
shigella
significant shigella species [4]
S. sonnei
S. dysenteriae
S. flexneri
S. boydii
Shigella spp
Most prevalent in the US
Neurotoxin & enterotoxin
Non-mannitol fermenter
S. dysenteriae
Shigella spp. Beta galactosidase (ONPG +) ODC +
S. sonnei
Motile & ODC Positive
Large amount of gas from glucose

Enterobacter
Enterobacter spp
Predominant isolate UTI & wound infection
E. cloacae
Enterobacter spp
Resembles E. cloacae
Yellow pigmented Neonatal sepsis
E. sakazakii
Short & nonmotile encapsulated Large, mucoid colonies Strings out when touched by the needle
Klebsiella
Klebsiella
Bacterial pneumonias
K. Pneumoniae
Kleb spp.
Blood & stool culture Indole positive
K. oxytoca
Kleb spp.
Atrophy of the nasal mucous membranes w/ fetid odor
Blood & stool
K. ozanae
Kleb spp.
Rhinoscleroma Destructive granuloma of the
nose & pharynx

K. rhinoscleromatis
impt spp of klebsiella [poor]
pneumonia
oxytoca
ozanae
rhinoscleromatis
impt spp of serratia [morl]
marcescens
liquefaciens
odorifera
rubidaea
Opportunistic pathogens
Deoxyribonuclease, lipase, gelatinase
red pigment
serratia
serratia spp.
Pneumonia & septicemia
S. marcescens
serratia spp.
Rancid, potato-like odor
S. odorifera
serratia spp.
Ferment arabinose
S. liquefaciens
Negative to Lactose, sucrose, sorbitol Citrate, DNAse, lipase
Hafnia alvei
Contaminated IV fluids
Yellow pigment
Negative to ADH, LDH, ODC
Pantoea agglomerans
number of serotypes of salmonella
2200
very complex genus
salmonella
classification of salmonella serotypes
Kauffman - White
enteric [typhoid] fever lasts for __
1 week
appearance of salmonella on BSA and BGA
Metallic colonies with black ring on bsa
sx for disease by salmonella - 1st and 2nd week
blood
sx for disease by salmonella - 3rd and 4th week
urine
sx for disease by salmonella - indefinite
stool
clinical diseases induced by salmonella
septicemia
enteric fever
gastroenteritis
antigen test for salmonella
widal test
o antigen in widal test meaning
active infection
h antigen in widal test meaning
past immunization or infection
Salmonella spp w/c causes
Enteric fever
Typhoid & paratyphoid
S. typhi
Salmonella spp w/c causes
septicemia
S. choleraesius
Salmonella spp w/c causes
gastroenteritis
S. typhimurium
S. enteritidis
salmonella test
Amebocytes of horse crab (visible gel)
endotoxin
linulus test
Ballooning of the intestinal tract or ileal loop (accumulation of fluid)
enterotoxin
ileal loop test
2 genera that citrobacter resembles
salmonella
e. coli
2 impt spp of citrobacter
freundii
diversus
tribe of Proteus Providencia Morganella
proteeae
tribe proteeae
Rapid urease activity “swarming” motility
on BA

proteus
Source of GI infection W
ound infections abscesses
Trauma or accidents (aquatic environment)
Biochemically similar to E. coli
Edwardsiella tarda
Abundant H2S in TSI agar
Lactose negative
LDC & ODC positive ADH negative
Edwardsiella tarda
size/appearance of yersinia on MAC
pinpoint
morphology of yersinia
coccobacilli
yersinia spp motile at RT
y. pestis
genus: nonmotile at 37C
Yersinia
yersinia spp which
causes enterocolitis
Ingestion of contaminated water, pork, beef or milk products
Fecal-oral transmission
Y. enterocolitis
Ferments mannitol and appears as red, “bull’s eye” colonies w/ colorless halo
CIN medium
yersinia enterolitica
types of plague by y. pestis
bubonic, septicemic, pneumonic
causes plague [black death]
y. pestis
vector of y. pestis
flea [through a bite]
yersinia with safety pin appearance
yersinia pestis
yersinia
“Stalactite patterns”
yersinia pestis
yersinia spp.
ferments both sucrose & sorbitol
yersinia enterolitica
yersinia spp.
fails to ferment both sucrose & sorbitol
yersinia pseudotuberculosis
Yersinia spp.
Wild animals & game fowl
Lymphadenitis in children
ODC negative Fails to ferment both sucrose & sorbito
Y. pseudotuberculosis
Citrobacter species
H2S +
KCN +
Freundii
Citrobacter species
Indol +
C diversus