Quick Flashcards

B. anthracis

Bamboo-shaped and Medusa Head; non-motile.

Listeria monocytogenes

Umbrella motility; cold (4°C); actin rockets.

C. diphtheriae

Club-shaped; gray pseudomembrane; bull neck.

Lactobacillus

Filamentous; catalase negative; vaginal flora.

H. influenzae

Satellite phenomenon; needs X and V factors.

H. ducreyi

School of fish appearance; painful ulcer; needs X only.

B. pertussis

Mercury drop colonies; associated with whooping cough.

Brucella

Causes undulant fever; associated with livestock; urease positive.

E. coli

Metallic green sheen on EMB; indole positive.

K. pneumoniae

Mucoid/snotty; non-motile; currant jelly sputum.

Serratia marcescens

Red pigment at room temperature; DNAse positive.

Proteus mirabilis

Swarming rings; burnt chocolate smell; urea positive.

Salmonella Typhi

H2S positive; motile; associated with gallbladder.

Shigella

H2S negative; non-motile; causes bloody stool.

Yersinia pestis

Safety pin stain; associated with fleas; fried egg colony.

P. aeruginosa

Blue-green pigment; grapes/taco smell; CF/burns patients.

V. cholerae

Yellow on TCBS; rice-water stool; string test positive.

V. parahaemolyticus

Green on TCBS; halophilic; needs salt.

V. vulnificus

Hemorrhagic bullae; associated with liver disease.

C. jejuni

Grows at 42°C; seagull wings appearance; associated with poultry.

H. pylori

Strong urease positive; associated with gastric ulcers.

TCBS culture media

Used for Vibrio identification (Yellow=Cholera, Green=others).

Bordet-Gengou

Culture media for Bordetella pertussis.

Chocolate Agar

Media for Neisseria and Haemophilus growth.

BCSA

Culture media for Burkholderia (dirt smell).

EMB agar

Used for E. coli identification (green sheen).

Fastidious bacteria

Bacteria that require complex growth factors.

Seagull wings appearance

Characteristic morphology of Campylobacter jejuni.

Indole test

Test for the ability to convert tryptophan to indole.

Urease test

Tests for the presence of urease enzyme that hydrolyzes urea.

Catalase test

Differentiates between staphylococci (catalase positive) and streptococci (catalase negative).

H2S production

Production of hydrogen sulfide, a characteristic of some enteric bacteria.

Actin rockets

Mechanism used by Listeria monocytogenes to move within host cells.