Anaerobes Flashcards
Vanc R GNC nitrate - Kana S Colis S Red fluorescence
Veillonella
Vanc R GNR BBE + urea - 20% bile + Kana & Colis S
Bacteroides gracilis
Vanc R GNR BBE + urea - 20% bile + Kana & Colis R LKV + concentric circles on agar
Bacteroides fragilis
Vanc R GNR BBE + urea + Kana & Colis S nitrate + catalase - 20% bile -
Bacteroides ureolyticus
Vanc R GNR BBE + UREA + Kana & Colis S Nitrate + catalase + 20% bile + fish eye colonies on BBE
Bilophila
Vanc R GNR BBE - Kanamycin R brick red fluorescence Colis S fermenter LKV +
Prevotella
Vanc S GNR BBE - Kanamycin R brick red fluorescence Colis R nonfermenter LKV -
Porphyromonas
Vanc R GNR BBE - Kana & Colis S lipase + indole + pointed ends
Fusobacterium necrophorum
Vanc R GNR BBE - Kana & Colis S lipase - tapered ends
Fusobacterium nucleatum
Vanc S
GPC
Metro R
Novo R
Streptococcus intermedius
Vanc S
GPC
Metro R
Novo S
Staphylococcus saccharolyticus
Vanc S GPC Metro S Kana S indole + SPS R Musty odor
Peptostreptococcus asaccharolyticus
Vanc S GPC Metro S Kana R SPS S indole - Sweet odor
Peptostreptococcus anaerobius
Vanc S GPR non spore forming motile gull winged
Mobiluncus
Vanc S GPR non spore forming nonmotile indole + catalase + Colis R nitrate +
Propionibacterium acnes
Vanc S GPR terminal spore horse stable odor ground glass chartreuse fluorescence lecithinase - CCFA + yellow
Clostridium difficile
Vanc S GPR spore lecithinase + reverse CAMP + box cars double zone beta hemolysis
Clostridium perfringens
Vanc S GPR spore lecithinase + reverse CAMP - lipase +
Clostridium botulinum
Vanc S GPR spore lecithinase + reverse CAMP - lipase - non swarming
Clostridium ramosum
Vanc S GPR terminal spore tennis racket (round) Lecithinase - reverse CAMP - lipase - indole and gelatinase + narrow zone beta hemolysis
Clostridium tetani
Vanc S GPR spore Lecithinase + reverse CAMP - lipase -
Clostridium septicum
what are common characteristics of all Clostridium species?
catalse -
Kana S
Colis R
can look G-
where are anaerobes normal flora?
oropharynx LGI vagina cervix urethra genitalia
Acceptable specimens for anaerobic culture
Bile Blood Body fluids Bone marrow Lung aspirate / biopsy Suprapubic bladder aspirates Tissue Transtracheal aspirate Wound
Ideal atmosphere
80 - 90% N2
5% H
5 - 10% CO2
Anaerobic transport media
Tubes of O2 reduced agar
Gas impermeable bags
Gold standard anaerobic method
Anaerobic chamber or glove box
Peptostreptococcus anaerobius infections
Mixed infections of skin, soft tissues, GI, female genital tract, bones, joints, lungs, brain
C diff infections
Antibiotic associated diarrhea
Pseudomembranous colitis
C perfringens infections
Gas gangrene
Food poisoning
Propionibacterium infections
Acne Artificial joint infections Catheters Shunts Artificial heart valves Keratitis Bacteremia Endocarditis
GPR
AEROTOLERANT
CAT -
Lactobacillus
What is used to fix gram stain specimens for anaerobes?
methanol
what is a sign that oxygen has entered the anaerobic jar method?
indicator strip stays blue
environment standards for anaerobe incubation
35 - 37
At least 48 hours
hold for at least 2-5 days
lipase + organisms
Fusobacterium necrophorum
Prevotella intermedia
Clostridium botulinum
what test can differentiate Peptostreptococcus anaerobius from other G+ cocci
SPS (Pepto = S)
what is diameter is considered sensitive to SPS?
12 mm
what does a positive lecithinase look like?
opaque white halos
what is the only indole negative GNR
Bacteroides fragilis
bile esculin + GNR
Bacteroides fragilis
B. gracilis
differentiate bile esculin + GNR
fragilis- Kana and colistin R
gracilis- kana and colistin S
only catalase + GNR
B. fragilis
Starch + and DNase + GNR
Prevotella
GNR fluorescers
fusobacterium
prevotella
porphyromonas
differentiate prevotella and porphyromonas
Prevotella- Vanc R, Colistin S, fermenter, LKV+
Porphyromonas- Vanc S, Colistin R, nonfermenter, LKV-
organism that causes Vincents angina or trench mouth
F. necrophorum
clostridia exotoxins
tetanospasmin botulism hemolysins lecithinase protease collagenase enterotoxin
most common types of botulism toxin
B, A, E
only clostridia that does not ferment glucose
tetani
Vancomycin S
Porphyromonas
All G+ cocci and rods
catalase -
indole -
SPS R
GPC
Finegoldia magna
Only organism Vanc R, Kana R, Colis R
Bacteroides fragilis
Fish eye colony
Appendicitis
Bilophila