Module 13 Aerobic Gram Pos. Rods

Corynebacterium diphtheriae

GP, pleomorphic rod

- Chinese letters (palisades/fences)

- Cause diphtheria

- metachromatic granules

pleomorphic

means the bacteria can vary in shape

diphtheria

What disease do you suspect?

- throat pseudomembrane

- complication: myocarditis, airway obstruction

protein synthesis

What does the diphtheria toxin inhibit

cystine-tellurite blood agar

What is the media for C. Diphtheriae that inhibits normal throat flora?

elek test

definitive test for confirming presence of C. diphtheriae toxin

Bacillus anthracis

- GP, spore forming, AErobic rods

- nonmotile, nonhemolytic, medusa colony

CIG, cutaneous(charcoal scab), inhalation (woolsorter), gastrointestinal

Bacillus Anthrax: man I need a __ ___ __-->

(three forms of the diease)

B. anthracis

source= spores from contaminated soil and animal products

- edema factor (toxin)

- lethal factor (toxin)

- black lesions (eschar)

Bacillus Cereus

- GP rod, spores, MOTILE/HEMOLYTIC

- Cause: food poison (emetic, diarrheal)

emetic form (heat stabile)

a form of food poisoning characterized by cramps and vomiting (b. cereus)

(room temp rice)

Diarrheal form (heat labile)

food poison caused by b. cereus characterized by diarrhea and abdominal cramps (longer duration)

(meat/soup/sauce)

Bacillus Cereus

"Be serious"-- cook it, cool it, refrigerate it

Listeria monocytogenes

What small gram-positive, non-spore-forming rod is a facultative intracellular parasite that grows in the cold and is associated with unpasteurized milk products?

Listeriolysin O

What enables Listeria Monocytogenes to escape from phagosome?

actin

What enables Listeria Monocytogenes to move from cell to cell?

Listeria monocytogenes

This bacteria grows well in raw dairy, soft cheese, and deli meats,

- it is risky for pregnant, newborns, and immunocompromised people