Spirochetes

32 Questions | By Darkrain9000 | Updated: Mar 20, 2022 | Attempts: 1602

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1.

There are two recognize species of Leptospires. L.interrogans and L. biblexa. L.interrogans are _______.
- A.
  
  Pathogenic
- B.
  
  Saprophytic
2.

There are two recognize species of Leptospires. L.interrogans and L. biblexa. L.biblexa are _______.
- A.
  
  Pathogenic
- B.
  
  Saprophytic
3.

The ends of Leptospire have ________ rather than just tapering off.
- A.
  
  Circle end
- B.
  
  Hook
- C.
  
  Balloon shape
4.

The motility of Leptospires are
- A.
  
  Slow and straight
- B.
  
  Rapid and rotational
- C.
  
  Rapid and straight
- D.
  
  Slow and rotational
5.

Leptospires cannot be readily stained but can be covered with ______ and then seen.
- A.
  
  Platinum
- B.
  
  Bronze
- C.
  
  Gold
- D.
  
  Silver
6.

Unstained cells are only visible under
- A.
  
  Brightfield
- B.
  
  Darkfield
- C.
  
  Phase contrast
- D.
  
  Immunofluorescent
7.

Leptospires are ____ and can be grown on artifical media.
- A.
  
  Anaerobic
- B.
  
  Aerobic
8.

Leptospires commonly used media is ______ medium.
- A.
  
  Mitchell's
- B.
  
  Danny's
- C.
  
  Randolph's
- D.
  
  Fletcher's
9.

Dogs, rats and other rodents are the principle animal reservoirs of Leptospires. The organism is excreted in the _______.
- A.
  
  Blood
- B.
  
  CSF
- C.
  
  Urine
- D.
  
  Stool
10.

Leptospirosis is a zoonotic disease usually associated with occupation exposure to animals or working with rats.
- A.
  
  True
- B.
  
  False
11.

Laboratory diagnosis of Leptospires using either Blood or CSF requires the urine to be _______ prior to inoculation on Fletcher's medium in the dark.
- A.
  
  Evaporated
- B.
  
  Diluted
- C.
  
  Sterilized
- D.
  
  Concentrated
12.

Borrelia is made up of several species of spirochetes, similar in morphology but different in pathogenic properties. Borrelia recurrentis causes _________.
- A.
  
  Lyme disease
- B.
  
  Relapsing fever
13.

Borrelia is made up of several species of spirochetes, similar in morphology but different in pathogenic properties. Borrelia burgodorferi causes _________.
- A.
  
  Lyme disease
- B.
  
  Relapsing fever
14.

All pathogenic borreliae are _______-borne.
- A.
  
  Water
- B.
  
  Air
- C.
  
  Arthropod
15.

Borreliae are highly flexible and much more coiled than the Leptospires.
- A.
  
  True
- B.
  
  False
16.

Borrelia can be stained and seen under the ______ microscope.
- A.
  
  Phase-contrast
- B.
  
  Brightfield
- C.
  
  Darkfield
17.

Borreliae are cultured using what medium?
- A.
  
  Flecther medium
- B.
  
  Randolph medium
- C.
  
  Kelly medium
- D.
  
  Danny medium
18.

Ticke-borne B. recurrentis has ________ louse-borne infection.
- A.
  
  Shorter
- B.
  
  Longer
19.

Involving Borrelia recurrentis spirochetemia is worse during febrile epsiodes and is _______ between recurrences.
- A.
  
  More
- B.
  
  Less
20.

Borrelia recurrentis infection is accompanied by sudden high fever, rigors, headache, muscle pain and weakness; febrile period is ___ to _____ days and ends abruptly with thedevelopment of an immune response.
- A.
  
  1 to 5
- B.
  
  3 to 7
- C.
  
  5 to 10
- D.
  
  4 to 6
21.

Borrelia recurrentis when it recurs several days to weeks later is less severe but similar in course.
- A.
  
  True
- B.
  
  False
22.

Relapes that occur in Borrelia recurrentis are caused by antigenic variation; ____________ are changed during the course of an infection which allows them to evade the host response.
- A.
  
  Chromosomes
- B.
  
  DNA
- C.
  
  Surface antigens
23.

Borreliae are suseceptible to many antibiotic but ______ is drug of choice.
- A.
  
  Quinone
- B.
  
  Tetracycline
- C.
  
  Penicillin
- D.
  
  Metrocylin
24.

2 out of these 3 drugs are used to treat B. burgdorferi in early diagnosis.
- A.
  
  Ceftriaxone
- B.
  
  Doxycycline
- C.
  
  Amoxicillin
25.

This drug is used to treat late stages of Borrelia burgdorferi.
- A.
  
  Tetracycline
- B.
  
  Ceftriaxone
- C.
  
  Doxycycline
- D.
  
  Amoxicillin