Microbiology Final Exam

What is the leading cause of neonatal meningitis?

Streptococcus agalactiae

Staphylococcus aureus

the release of exfoliative toxin by this organism results in the disease Impetigo

Staphylococcus saprophyticus

this organism is associated with commonly causing urinary tract infections in sexually active young adult and adolescent females

Mycobacterium leprae

which of the following organisms would be considered least virulent

Clostridium tetani

production of a neurotoxin that binds to target sites on spinal cord neurons responsible for inhibiting skeletal muscle contraction is a characteristic of:

Clostridium perfringens

this organisms can infect deeper wound sites and produce exotoxins, enzymes, and gas that cause tissue and muscle necrosis

Causes a unique 21-day cyclic fever

all of the following pertain to Listeria monocytogenes except:

Diphtheria

the formation of a pseudomembrane in the back of the throat is seen in

antibiotics cannot treat and cure tuberculosis

all of the following pertain to tuberculosis except:

influenza (flu)

which of the following is not caused by Haemophilus influenzae?

Treponena pallidum subspecies pallidum:

[all of the choices are correct] causes syphilis; can cross the placenta; is a spirochete; is transmitted by direct sexual contact.

Secondary

stage of syphilis that fever, lymphadenopathy, and a red-to-brown rash occurs

Tertiary

stage of syphilis that permanent cardiovascular and neurological damage is seen

Lyme disease

erythema migrans, a bull's-eye rash at the portal of entry, is associated with:

Neuraminidase

the enzyme associated with the influenza virus that hydrolyzes the protective mucous coating of the respiratory tract is:

bacterial pneumonia

influenza infection predisposes compromised patients for acquiring:

measles

oral lesions called Koplik's spots are seen in patients with:

rubella

this febrile disease with a rash has a pathogen that can cross the placenta and cause serious fetal damage:

rabies

not caused by a prion

yellow fever

what is a hemorrhagic fever?

spongiform encephalopathies are:

[all of the above] associated with abnormal, transmissible, protein in the brain; chronic, fatal infections of the nervous system; caused by prions; asociated with CJD.

Pneumocystis (carinii) jiroveci

this opportunist is the most frequent cause of life-threatening pneumonia in AIDS patients

how does acanthamoeba differ from Naegleria fowleri?

only acanthamoeba enters typically through broken skin or the conjunctiva

which of the following is an apicomplexian parasite?

toxoplasma gondii

which of the following is not a protozoal disease?

tetanus

trypanosoma brucei

causes african sleeping sickness

T/F: It is theorized that rheumatic fever could be the result of antibodies to Streptococcus pyogenes that cross-react with patient cardiac tissue.

true

T/F: Impetigo involves itching papules that break and form a very contagious yellow crust.

true

T/F: Tetanus can be prevented with the DTaP childhood immunization and boosters of the tetanus toxoid.

true

T/F: A black eschar develops on the hand or arm of a patient with measles.

false

T/F: Chlamydias and rickettsias are unusual bacteria because they do not have cell walls.

false

T/F: Chlamydiosis can lead to ectopic pregnancy and pelvic inflammatory disease.

true

T/F: A person carrying one gene for sickle-cell hemoglobin will be resistant to Plasmodium infection.

true

T/F: Herpes Simplex Virus 1 and 2 can cause encephalitis in neonates.

true