Chapter 22 CLibac lec finals

Obligate aerobe

E requires oxygen for growth

Microaerophile

D requires small amount of oxygen

Facultative anaerobe

B grows with or without oxygen

Aerotolerant anaerobe

F tolerates oxygen but does not use it

Obligate anaerobe

C grows only without oxygen

Capnophile

A requires increased CO2

Hydrogen peroxide

A degraded by catalase

Superoxide anion

C toxic oxygen radical

Hydroxyl radical

B most potent oxidant

Superoxide dismutase

C converts superoxide radicals

Catalase

E breaks down hydrogen peroxide

Thioglycollate

A reducing agent for anaerobic media

Cysteine

B reducing agent added to media

Dithiothreitol

C maintains low redox potential

C. botulinum

C botulism

C. tetani

D tetanus (lockjaw)

C. difficile

A pseudomembranous colitis

C. perfringens

B gas gangrene

C. septicum

E marker for GI malignancy

Botulinum toxin

D prevents acetylcholine release

Tetanospasmin

C prevents neurotransmitter release

α-toxin

A causes tissue necrosis

Toxin A

B enterotoxin

Toxin B

E cytotoxin

Trismus

C lockjaw

Risus sardonicus

A distorted grin

Pseudomembranous colitis

B bloody diarrhea

Bullae

D gas gangrene finding

Sulfur granules

E actinomycosis

Actinomyces israelii

B branching organism

Lactobacillus

A largest vaginal flora

Mobiluncus

C bacterial vaginosis

Propionibacterium

D blood culture contaminant

Bifidobacterium

E forked morphology

Bacteroides fragilis

B most common anaerobic isolate

Prevotella

D does not grow on BBE

Porphyromonas

C brick-red fluorescence

Fusobacterium

A fusiform rods

Bilophila wadsworthia

E fish-eye appearance

BBE agar

C Bacteroides growth

KVLB agar

D Prevotella growth

CCFA

A C. difficile isolation

CHOC

E aerobic with CO2

EYA

B lecithinase/lipase detection

Aspirate

B needle and syringe collection

Swab

A unacceptable for anaerobes

Tissue biopsy

C maintains reduced atmosphere

PRAS medium

D oxygen-free transport

Thioglycollate broth

E used for swab transport

C. perfringens

A gas gangrene

C. tetani

B lockjaw

C. botulinum

C botulism

C. difficile

D pseudomembranous colitis

C. septicum

E GI malignancy marker

Hydroxyl radical

B most toxic oxygen product

Hydrogen peroxide

A substrate for catalase

Superoxide dismutase

C converts superoxide

Singlet oxygen

D reactive oxygen species

Clostridium tetani

A terminal spore

Clostridium septicum

B subterminal spore

C. perfringens

C most common gas gangrene cause

C. difficile

D barnyard odor

Actinomyces

E molar tooth colonies

Bifidobacterium

A forked morphology

Propionibacterium

D diphtheroid contaminant

Eggerthella

C small circular colonies

Finegoldia magna

C most pathogenic anaerobic coccus

Veillonella parvula

B gram-negative anaerobic coccus

Peptostreptococcus

A anaerobic cocci group

Anaerococcus

D urease positive species

Hydroxyl radical

B most potent oxidant

Hydrogen peroxide

A toxic oxygen product

Superoxide anion

C reactive oxygen species

Lockjaw

D tetanus

Gas gangrene

B myonecrosis

Pseudomembranous colitis

A C. difficile disease

Actinomycosis

C sulfur granules disease

BBE agar

C Bacteroides growth medium

KVLB agar

D Prevotella medium

CCFA

A C. difficile medium