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Flashcards in Bacte, USMLE Deck (283)
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1

What does Candida albicans do that distinguishes it from other fungi?

It forms a germinal tube at 37°C.

2

What protozoal parasite results in dysentery with blood and pus in the stool, is transmitted via fecal-oral route, is diagnosed by cysts or trophozoites in the stool, and forms liver abscesses and inverted flask-shaped lesions in the large intestine?

Entamoeba histolytica (treat with metronidazole)

3

What is the most likely causative organism for a patient with folliculitis after spending time in a Hot Tub?

Pseudomonas aeruginosa

4

What two viruses get their envelope not from budding but from coding?

HIV and poxvirus

5

Which type of hepatitis can cause hepatocellular carcinoma?

Hepatitis B

6

Gas gangrene is associated with which Clostridium species?

Clostridium perfringens

7

Which dimorphic fungus is found as hyphae with nondescript conidia in rotting wood in the Upper Great Lakes, Ohio, MIssissippi, eastern seaboard of the United States, and southern Canada?

Blastomyces dermatitidis

8

Which parasitic organism, when it crosses the placenta, results in intracerebral calcifications, chorioretinitis, microcephaly, hydrocephaly, and convulsions?

Toxoplasma gondii

9

What staphylococcal species is positive for b-hemolysis and coagulase?

Staphylococcus aureus

10

What vector is associated with malaria?

Anopheles mosquito

11

What is the term for hyphae with constrictions at each septum that are commonly seen in Candida albicans?

Pseudohyphae

12

Which cestode infection results in alveolar hydatid cyst disease?

Echinococcus multilocularis

13

Which hepatitis virus is in the Flaviviridae family?

Hepatitis C

14

What nonmotile gram-netative, non-lactose-fermenting facultative anaerobic rod uses the human colon as its only reservior and is transmitted by fecal-oral spread?

Shigella

15

What is the only Rickettsia that is stable in the environment?

Coxiella burnetii

16

Regarding the viral growth curve, is the internal virus present before or after the eclipse period?

After the eclipse period

17

What Ab is an indication of recurrent disease for hepatitis?

HBcAb

18

What small gram-positive, non-spore-forming rod is a facultative intracellular parasite that grows in the cold and is associated with unpasteurized milk products?

Listeria monocytogenes

19

What is the only DNA virus that is not icosahedral?

Poxvirus

20

Which organism causes trench mouth?

Fusobacterium

21

True or false? All of the following are inactivated vaccines available in the United States: influenza, Vibrio cholera, hepatitis A, rabies, and adenovirus.

False, Adnovirus vaccine is a live pathogenic virus in an enteric coated capsule. All of the others are inactivated vaccines.

22

No persistent liver stage or relapse; blood smear shows multiple ring forms and crescent-shaped gametes; irregular febrile pattern; associated with cerebral malaria

Plasmodium falciparum

23

No persistent liver stage or replapse; blood smear shows rosette schizonts; 72-hour fever spike pattern

Plasmodium malariae

24

Persistent hypnozoite liver stage with relapses; blood smear shows amoeboid trophozoites with oval, jagged infected RBCs; 48-hour fever spike pattern

Plasmodium ovale

25

Persistent hypnozoite liver stage with relapses; blood smear shows amoeboid trophozoites; 48-hour fever spike pattern; the most prevalent form worldwide

Plasmodium vivax

26

True or false? A positive PPD skin test indicates the patient has active pulmonary disease.

False. The PPD tests exposure to TB.

27

What Viral infection is known to cause intracerebral calcifications?

CMV; Toxoplasma also causes intracerebral calcifications but it is a parasite.

28

What viruses are associated with cervical carcinoma?

HPVs 16 and 18

29

What motile, gram-negative spiral bacillus with flagella is oxidase positive, urease positive, and associated with gastritis, peptic ulcer disease, and stomach cancer?

Helicobacter pylori

30

What glycoprotein in the HIV virus is used for fusion?

GP41