Question

1. A patient who has been in intensive care for 8 days starts rapidly deteriorating. You notice the area around her intravenous line appears dark and swollen and an x Ray shoes what appear to be gas pockets. She likely has gas gangrene due to:

A. Clostridium perfringens

B. Bacillus cereus

C. Corynebacterium ulcerans

D. Escerichia coli

2.

Recent studies have reported that although children infected with SARS CoV 2 are less likely than adults to be symptomatic they have as high levels of virus and shed it. Which of these other infections is also usually milder in young children?

A. Epstein Barr virus

B. Bordetella pertussis

C. Rotavirus

D. Coxsackie virus

3. You have a patient with headache, fever, and confusion who recently had an earache. When you do a spinal tap you find Gram positive cocci. What is the diagnosis?

A. Streptococcus pneumoniae meningitis

B. Haemophilus influenza meningitis

C. Neisseria meningitidis meningitis

D. Enterococcus faecalis meningitis

4. You are supposed to develop a test to see if patients have recovered from covid-19. Which of these antibody types should you find in their blood specific for SARS CoV 2 if your test is accurate?

A. IgG

B. IgM

C. IgA

D. IgE

5. A 6 year old girl is brought in because she isn't urinating frequently and she tells you it burns when she does. Gram stain of a urine sample finds abundant round purple bacteria, which test non-hemolytic, the most likely diagnosis is:

A. Enterococcus faecalis

B. Staphylococcus aureus

C. Escerichia coli

D. Neisseria gonorrhea

6. Antibodies are important tools in diagnostics, but not the only one. Which of the following is NOT an antibody based diagnostic test?

A. Coagulase test

B. ELISA

C. Immunofluorescence staining

D. Lancefield agglutination test

7. You have a sample that produces a fuzzy colony and need to determine whether it is a fungus or actinomycete (filamentous bacteria). Which of these would be true ONLY if it was a fungus but not an actinomycete?

Group of answer choices

A. Has a nucleus

B. Has peptidoglycan

C. Has ribosomes

D. Has doubles stranded DNA

8. A parent comes in with their 3 year old who found a fox and was playing with it until it bit him. You find a small bite on the hand. What is the proper treatment?

A. Clean, inject anti-rabies antibody and start vaccine

B. Wash the wound and watch for infection

C. Wash the bite and give antibiotics

D. Put the child in the hospital on IV vancomycin

Answer 1

1) A. Clostridial perfringens

Gas gangrene or myonecrosis is characterized by rapid progressive invasive and degradation of health muscle tissue most commonly by clostridium species. Traumatic myonecrosis is caused by C. Perfirngens while the spontaneous gangrene is most commonly caused by C. Septicum.

Here the gas gangrene is formed along the IV line to deep tissue by Clostridium perfirngens.

Hope this helps. Feel free to revert back if you have any query.

Best wishes!!