Microbiology 3 Flashcards
Enterobacteriaceae
Nonmotile Enterobacteriaceae
Shigella Klebsiella
Y. enterocolitica @37C
Nonmotile @ 37C
Y. enterocolitica
Listeria
Biochemically inert
Shigella - only Methyl red (+)
“CPON NO GF FA”
Enterobacteriaceae
Catalase positive Oxidase negative
Nitrate reducers
Glucose fermenters
Facultative anaerobes
LF enzymes
Lactose permease
Beta-galactosidase
RLF + TSI reaction
“EKE”
Escherichia Klebsiella Enterobacter
TSI: A/A H2S(-)
LLF + TSI reaction
“Cit Ser, Yer Haf Sa Shi is LATE”
Citrobacter
Serratia
Yersinia enterocolitica
Hafnia
Salmonella arizonae
Shigella sonnei
TSI: A or K/A
NLF + TSI reaction
“Sarap-Sarap ng PPM Eh!”
Salmonella
Shigella
Proteus
Providencia
Morganella
Edwardsiella
TSI: K/A
Rapid urease producer except
Providencia stuartii
PPM
Rapid urease producer
LIA: R/A (lysine deamination)
Phenylalanine deaminase (+)
Motile
UTI
TSI K/K
Pseudomonas
Most common cause of UTI in human
Uropathogenic E. coli (UPEC)
ETEC stool
Profuse watery stool
Traveler’s diarrhea/Montezuma’s revenge
Cholera-like toxin
ETEC
Heat-labile enterotoxin
Shiga-like toxin
EHEC (Verotoxin)
Shigella-like infection
EIEC
EIEC stool
Explosive watery stool with mucus and blood
EIEC strains
Like Shigella: nonmotile, NLF
Shigella stool
Scanty, bloody
Watery diarrhea with mucus, no blood (non-invasive, no toxin)
Infantile diarrhea/pediatrics
EPEC
Green metallic sheen on EMB
E. coli
Associated with E. coli O157:H7
EHEC/VTEC
Sorbitol (-) Colorless on SMac
MUG (-)
E. coli O157:H7
Most severe manifestation of EHEC
HUS
Jack in the Box outbreak - beef hamburger disease
Hemorrhagic colitis
HUS
E. coli O157:H7
Adhere to HEp2 in aggregative “stacked brick pattern”
EAEC
Indole positive Klebsiella
K. oxytoca + - ++
LDC (+)
Klebsiella, Salmonella
Enterobacter slow urease (+)
E. gergoviae
Enterobacter produce yellow pigmentation that intensifies at 25C
Enterobacter sakazakii
Slow urease producers
“CKEYS”
Citrobacter
Klebsiella
Enterobacter gergoviae
Y. enterocolitica
Serratia
Triple LOA (-)
Pantoea agglomerans
Triple LOA (+)
Plesiomonas
Triple enzyme (+)
DNAse, Lipase, Gelatinase (+)
Serratia
E. aerogenes LOA
++-
E. cloacae LOA
-++
K. pneumoniae LOA
+–
E. coli LOA
++-
Donovan bodies (pathognomonic)
Granuloma inguinale/donovanosis
Klebsiella granulomatis
Produce prodigiosin (red pigment) at room temp
Serratia marcescens
NLF H2S(+) Motile LDC (+)
Salmonella
Pea soup stool (green)
Salmonella
(+) Methyl red, ONPG
Slow urease (+)
Growth on KCN agar
Citrobacter freundii
Selective medium for S. typhi
Bismuth Sulfite Agar BSA
Black colonies with metallic sheen
Milk-borne disease of cow
S. typhi
OX-K source
P. mirabilis
Shigella ONPG+
S. sonnei
Associated with staghorn/struvite/Mg ammonium phosphate stones/triple phosphate crystal
Proteus
H2S (+)
“SPACEd”
Salmonella
Proteus
Arizonae
Citrobacter freundii
Edwardsiella tarda
Providencia differentiating test
Citrate (+)
Morganella differentiating test
ODC (+)
E. tarda differentiating test from E. coli (same IMViC)
H2S+
NLF
Vector of Y. pestis
Xenopsylla cheopsis (rat flea)
Cauliflower colonies on BAP 48H
Y. pestis
Appendicitis-like pain in children is caused by
Y. enterocolitica
Stalactite pattern in broth culture
Y. pestis
Bull’s eye colonies in CIN after 48H
Y. enterocolitica
Aeromonas
Preferential growth temp of Yersinia
25-30C
Motile at 25C, nonmotile at 37C
Yersinia
Sulfur source of H2S medium
Sodium thiosulfate
Sulfur source of TSI
Ferrous sulfate (nonmetallic)
Other H2S media and their H2S indicator
SSA XLD HEA
SIM LIA
Ferric ammonium citrate (FAC)
Media with phenol red as indicator
“MX CUT”
MSA
XLD
CTA
Urease
TSI
NLF nonH2S producer
“SSPPM minus SPACEd”
Shigella
Providencia
Morganella
Lysine deaminase positive
Phenylalanine deaminase positive
PPM
Product of deamination of acids
Ammonia
K/A H2S-
Shigella
Tests that uses bromthymol blue as indicator
Citrate, Acetate, Acetamide, Malonate
Fish-eye colonies on EMB (pink with dark center)
Enterobacter
Pink colonies with pink halo on MAC
E. coli
XLD inhibitor
Sodium desoxycholate
Yellow colonies with black center on XLD
Proteus
E. coli on HEA
Salmon orange
E. coli on XLD
Yellow with yellow halo
Indole test detects
Tryptophanase
Indole test indicator
PDAB Kovac’s/Ehrlich’s reagent
Indole positive control
E. coli
Spot indole test reagent and positive result
PDAC
(+) blue
Indole positive Enterobacteriaceae
“May PEKPEC Po?”
Morganella
Proteus vulgaris
E. coli
Klebsiella oxytoca
Edwardsiella tarda
Citrobacter koseri
Plesiomonas
Methyl red test positive end products are
“LAFS” mixed acid fermentation pathway
Lactic acid
Acetic acid
Formic acid
Succinic acid
VP reagents
a-naphthol and 40% KOH
VP detects
acetoin
VP positive
“KEESH”
Klebsiella
Enterobacter
Ewingella
Serratia
Hafnia
Media with bromthymol blue indicator
“CHOT”
Citrate
HEA
OF Hugh Leifson
TCBS
Citrate positive
“PeRO Sa CHEEKS”
Providencia
Serratia
Citrobacter
Hafnia
Ewingella
Enterobacter
Klebsiella
Salmonella enteritidis
Rapid urease producers
“TPUNCH”
T. mentagrophytes
PPM
Ureaplasma
Nocardia
C. neoformans
H. pylori
LOA end products
“Let’s Order A CaPuCino”
Lysine - Cadaverine
Ornithine - Putrescine
Arginine - Citrulline
Medium where all Salmonella will grow except S. typhii
Brilliant green agar
Shigella group types
“DA FB BC SD”
S. dysenteriae - A
S. flexneri - B
S. boydii - C
S. sonnei - D
Indole negative proteus
Proteus mirabilis
OX-2 and 19 source
P. vulgaris
Cold enrichment
Non motile at 37C
Y. enterocolitica
Most common cause of death following transfusion of packed red cells
Y. enterocolitica
CPON
- Staphylococcus
- Enterobacteriaceae
- Francisella
- Oxidizer: Stenotrophomonas, Acinetobacter
CPOP
- Micrococcus
- Neisseria, Haemophilus
- Plesiomonas, Aeromonas, Vibrio
- Oxidizer: Pseudomonas, Burkholderia
- Campylobacter, Helicobacter, Chromobacterium