Multiple Choice in Practice Exam

Plantomyces

Has internal membranes and is dimorphic

Mycoplasma pneumoniae

Has no cell wall

Ehrlichia chaffeensis

Has a tick vector and lowers WBC count

Caulobacter

Is dimorphic and lacks internal membranes

Streptomyces

Are mycelial and make antibodies

Myxobacteria

Forms fruiting bodies

E. coli strain O157:H7

Is associated with hemorrhagic colitis

Clostridium difficile

Usually acquired during hospitalization

Bacillus

May cause anthrax

Streptococcus

Are characterized by Lancefield serogroups

Bacteroides

Is prevalent in the human colon

Vibrio cholerae

Produces “rice water” stool

Chlamydia trachomatis

May cause pelvic inflammatory disease

Salmonella enterica

Causes self-limiting gastroenteritis

Aquifex

Is a hyperthermophile

Deinococcus

Is highly resistant to radiation

Pseudomonas aeruginosa

Can cause serious infections in CF and burn patients

Spirochetes

Cause syphilis and Lyme disease