Micro Exam 2 Follow Up Questions

Front 1

Which microorganism is MOST likely to cause the death of a patient in 1 to 2 days if they do not receive appropriate treatment?

Back 1

Vibrio cholerae 01

Front 2

An experimental compound which prevents the activation of adenyl cyclase and the resulting increase in cyclic AMP would be predicted to be MOST effective in counteracting the toxic effects of:

Back 2

Vibrio cholerae

Front 3

A 2-year-old infant is brought to the emergency room at Boston Medical Center with hemolytic uremic syndrome and thrombocytopenia. Which organism is the MOST likely cause of this child’s illness?

Back 3

Escherichia coli 0157/H7

Front 4

What does an AFB positive smear mena?

Back 4

Pts either has Mycobacterium or Nocardia

Front 5

Protection from disease produced by Corynebacterium diphtheriae is mediated primarily by an antibody response to the toxin. Production of the toxin is controlled by:

Back 5

the DtxR repressor protein

Front 6

A patient is to be treated prophylactically with an oral regimen of amoxicillin for prevention of bacterial endocarditis. A concern that should be discussed in taking the patient’s history is:

Back 6

the risk of allergic reactions to penicillins, which may manifest as rash or anaphylaxis.

Front 7

A 64-year-old patient of yours fell into a rose patch and suffered multiple puncture wounds from the thorns and the loss of 3 teeth which has brought him to your office. The accident was three weeks earlier and you are fitting him for crowns when you notice that he is sweating profusely. He complains that he does not feel well, has difficulty in swallowing, and difficulty opening his jaw. You discover he has not had any vaccines in over 10 years. Based on this information, your patient most likely has which disease?

Back 7

Tetanus

Front 8

he minimal inhibitory concentration (MIC) of an antibiotic is determined to be 1 μg/ml for a bacterium isolated from a sputum sample of a patient. After a four-week regimen of the antibiotic, the MIC is re-tested and found to be 6 μg/ml. This phenomenon is best described as:

Back 8

acquired resistance

Front 9

Legionnaire's disease is caused by a a bacterium that

Back 9

can grow in equipment with water and iron

Front 10

Pathogenicity of Bordetella pertussis is BEST correlated with the production of:

Back 10

hemagglutinin and severa different endotoxins

Front 11

The most common bacterial cause of diarrhea in the United States is an organism which is found primarily in which one of the following reservoirs?

Back 11

animals

Front 12

What's a major side effect of isoniazid (INH)

Back 12

hepatits

Front 13

problem with the use of certain macrolide antibacterial agents and azole antifungal agents is their ability to:

Back 13

cause drug interactions by inhibiting cytochrome P450 enzymes that inactivate some drugs.

Front 14

What can the virulene factors, collectively, produced by Group A streptococci be described as?

Back 14

all have different functions that benefit bacteria

Front 15

Which one of the following diseases is an emerging infection in the United States caused by eating contaminated and improperly cooked food and can result in severe kidney damage?

Back 15

hemolytic uremic syndrome

Front 16

A young couple brings their newly adopted 2-year-old daughter to your office.
They traveled to Southeast Asia one week ago to pick her up from an orphanage. There is no record that she has received any of the usual childhood vaccinations. She has been sick for the last 2 days and is exhibiting symptoms consistent with diphtheria. This disease:

Back 16

can be treated by administering antibodies directed against the bacterial

Front 17

A 42-year-old woman who has been on steroids for a flare up of her ulcerative
colitis is seen by you with a chief complaint of difficulty in breathing and over the past few days has experienced headache, fever, and cough. Pulmonary x-rays and a physical exam lead you to believe she has a bronchopneumonia. Her recent past history is not informative except for the following: within the past week she had a single wisdom tooth removed under inhalation anesthesia in her dentist’s office. Based on this information, which one of the following organisms should be strongly considered as part of your differential diagnosis?

Back 17

Legionella pneumophilia

Front 18

Previously healthy patients who are diagnosed with cryptococcosis should:

Back 18

be tested for HIV

Front 19

A patient who was diagnosed with tuberculosis 10 years ago, is coughing up
blood. A chest X-ray reveals the presence of a “fungus ball” which:

Back 19

forms in pre-existing cavities in lung

Front 20

Following acute infection with Histoplasma capsulatum, which one of the
following MOST commonly happens?

Back 20

immune response develops, leadin to recovery

Front 21

Which one of the following is the MOST effective single treatment for a patient with an established Corynebacteria diphtheriae infection?

Back 21

passive immunization with anti-toxin sera

Front 22

The diphtheria toxin becomes part of the genetic information of Corynebacterium
diphtheria during

Back 22

specialized transduction

Front 23

You are examining a young child with clear symptoms of impetigo. A Gram-stained smear of material from one of the facial lesions reveals clusters of Gram-positive cocci amid many polymorphonuclear leukocytes. Based on this information, which one of the following organisms is MOST likely causing this disease?

Back 23

Staph. aureus

Front 24

The formation of a pseudomembrane which can become dislodged and cause a life-threatening airway obstruction is characteristic of infection with:

Back 24

Cornyebacterium diptheriae

Front 25

Hyphae are seen in the tissue of patients with which one of the following fungal infections?

Back 25

aspergillosis