Qbank 2016

Question 1

2 bacteria causing food poisoning via preformed heat-stable exotoxin

Answer 1

Staphylococcus aureus

Bacillus cereus

Question 2

3 diseases caused by exotoxin of Staph aureus

Answer 2

Toxic shock syndrome
Staphylococcal scalded syndrome
Gastoenteritis

Question 3

4 bacteria that cause diarrhea with a small inoculum (low ID50)

Answer 3

Shigella
Campylobacter jejuni
Entamoeba histolytica
Giardia lamblia

Question 4

4 bacteria with high ID50

Answer 4

Salmonella
Vibrio
Clostridium perfringens
Escherichia coli

Question 5

2 bacteria causing nonbullous impetigo

Answer 5

Staph aureus
Strepto pyogenes (beta hemolytic group A)

Question 6

2 complications after Strepto pyogenes skin infection and pharyngeal infection

Answer 6

Poststreptococcal glomerulonephritis (skin - pharyngeal)
Acute rheumatic fever (pharyngeal)

Question 7

5 triggers for Candida vaginitis

Answer 7

Antibiotic use
High estrogen levels (pregnancy)
Systemic corticosteroid therapy
Uncontrolled diabetes mellitus
Any cause of immunosuppression

Question 8

4 causes of genital ulcers

Answer 8

Syphilis (Treponema pallidum)
Genital herpes (HSV)
Chancroid (Haemophilus ducreyi)
Granuloma inguinale (Klebsiella granulomatis)

Question 9

3 toxins with superantigen activity

Answer 9

Enterotoxins
Exfoliative toxins
Toxic Shock Syndrome Toxin

Question 10

4 symptoms of Dengue fever and 4 symptoms of Chikungunya (both transmitted by Aedes aegypti mosquitoes)

Answer 10

Dengue fever: acute fever, headache, retro-orbital pain, joint and muscle pain.

Chikungunya: fever, flulike symptoms, polyarthralgias, diffuse macular rash.

Question 11

2 diseases transmitted by Ixodes tick

Answer 11

Babesiosis (Babesia microti)
Lyme disease (Borrelia burgdorferi)

Question 12

1 AB that can cause disulfiram-like reaction after ethanol consumption

Answer 12

Metronidazole

Question 13

5 treatments for Plasmodium

Answer 13

Chloroquine (for sensitive species)
Mefloquine (for chloroquine-resistant species)
Atovaquone-proguanil
Artemisinins
+ Primaquine (associated to one of the others if P.vivax or P.ovale)

Question 14

3 symptoms of Waterhouse-Friderichsen

Answer 14

Adrenal gland destruction
Disseminated Intravascular Coagulation
Shock

Question 15

3 agents that affect acetylcholine receptors + mecanisms

Answer 15

Muscarinic antagonists inhibit postsynaptic action of ACh
Botulinum neurotoxin blocks presynaptic exocytosis of ACh vesicles
Organophosphates prevent ACh degradation