Microbology Named Bacteria

Question 1

Helicobacter pylori

Answer 1

Major cause of peptic ulcers

Does not enter cells

Gram negative

Motile, curved, spiral, or straight, slightly plump

It can hydrolize urea very rapidly

It has been hypothesized that the neutralizing effect of the ammonia released from this hydrolysis produces a more favorable environment for colonization in the stomach.

Question 2

Streptococcus mutans

Answer 2

The oral step is in the mouth

Upper respiratory tract of humans

Several of these organisms are capable ofhydrolyzing sucrose and forming dental plaque.

Lactobacillus erodes the tooth enamel and is responsible for the formation of dental caries.

Question 3

Treponema pallium

Answer 3

Gram negative

The organism enters body through mucous membrane, abrasions, or fissures in the epithelial.

Syphilis

Question 4

Borrelia burgdorferi

Answer 4

Gram negative

Lyme disease

Question 5

Pseudomonas aeruginosa

Answer 5

Aerobic highly motile

Secreted tissue damaging enzymes

Immune depressant

Common in water soil plants

Hospital sinks, dialysis equipment

Question 6

Bacillus anthracis

Answer 6

Gram positive rod

Nonmotile
Nonhemolytic
Encapsulated
It cause anthrax in animals and more rarely, in humans

Capsule which enables it survive phagocytosis and disseminate via blood steam

Secretion of powerful tissues destroying exotoxin.