Microbiology

Random 1

100

Which Haemophilus species is known to cause meningitis in infants?

H. influenzae type B

200

A college student attended a beach party where raw oysters were served. The next day, she was admitted to the ER. What organism do you suspect?

Vibrio vulnificus

300

An organism that exhibits satellitism around colonies of Staphylococcus is?

Haemophilus influenzae

400

Which species of Haemophilus requires both X and V factor?

H. influenzae

500

Which organism is known to cause rice water stool, severe dehydration, and love of salt?

Vibrio cholerae

Who am I

100

Gram positive cocci

Appear in clusters

Catalase positive

Coagulase positive

Staphylococcus aureus

200

Gram positive cocci

Catalase negative

Alpha hemolytic

Bile-esculin negative

Optochin resistant

Viridans Streptococci

300

Gram negative bacillus

Large capsule

Mucoid colony

Lactose fermentor

Klebsiella pneumoniae

400

Gram positive bacillus

Spore forming

Aerobic

Motile

beta-hemolytic

Bacillus cereus

500

Gram positive cocci

In chains

Catalase negative

Beta-hemolytic

Bacitracin resistant

Camp positive

Streptococcus agalactiae

Who am I

100

Gram negative bacillus

Non-lactose fermentor

Bipolar staining (safety pin)

Yersinia pestis

200

Gram negative bacillus

Non-lactose fermentor

Oxidase negative

H2S producer

Motile

Salmonella typhi

300

Gram positive cocci

clusters

Catalase positive

Coagulase negative

Novobiocin sensitive

Staphylococcus epidermidis

400

Gram positive bacilli

Non-sporeforming

Non-motile

“Chinese letter” appearance

Black colonies on potassium tellurite agar

Corynebacterium diphtheriae

500

Gram negative bacillus

Lactose fermentor

Indole positive

E. coli

Who am I

100

Gram negative bacillus

Non-lactose fermentor

Oxidase negative

Non-motile

Non H2S producer

Shigella dysenteriae

200

Gram positive cocci

In chains

Catalase negative

Alpha-hemolytic (can be gamma or beta rare)

Growth in 40% bile 

PYR positive

Growth in 6.5% NaCl

Enterococcus faecalis

300

Gram negative bacillus

Non-lactose fermentor

Oxidase positive

Glucose fermentor

Comma shaped

Vibrio cholerae

400

Gram positive cocci

clusters

Catalase positive

Coagulase negative

Novobiocin resistant

Staphylococcus saprophyticus

500

Gram negative bacillus

Non-lactose fermentor

Oxidase positive

Glucose non-fermentor

K/K TSI

Blue green colony with “fruity” odor

Pseudomonas aeruginosa

Who am I

100

Gram positive cocci

chains

Catalase negative

Beta-hemolytic

Bacitracin sensitive

Streptococcus pyogenes

200

Gram positive bacillus

Non-spore forming

Motile – tumbling

Listeria monocytogenes

300

Gram positive Diplococcus

Catalase negative

Alpha hemolytic

Bile esculin negative

Optochin susceptible

Streptococcus pneumoniae

400

Gram positive bacillus

Spore forming

Aerobic

Non-motile

non-hemolytic

Needs thiamin for growth

String of pearls appearance

Medusa head

Bacillus anthracis

500

Gram positive cocci

Catalase negative

Alpha-hemolytic

Grows in 40% bile

PYR negative

No growth in 6.5% NaCl

Group D Streptococci