Micro Bio Chp 21 Exam 5

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Microbiology
Chapter 21
Medical Micro Kingwood tx
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1

Which of the following bacteria is responsible for the most common bacterial gastroenteritis in the United States, usually accompanied by frequent bloody diarrhea?

Campylobacter jejuni

2

A patient in urgent care clinic reports having frequent episodes of diarrhea with abdominal pain and fever for several days. the patient reports an allergy to shellfish. A recent bowel movement contains traces of blood. A fecal sample shows the presence of Gram-negative, curved motile, urease-negative bacteria. Which of the following bacteria is most likely responsible for the patients symptoms?

Campylobacter jejuni

3

Shortly after returning from a trip to several continents, a young man experiences episodes of fever, chills, muscle aches, and headache that recur at irregular intervals. The young man reports carrying only a large backpack and commonly staying in hostels along the way while traveling. Which of these diseases is he likely to have?

louse-borne relapsing fever

4

The emerging disease known as anaplasmosis is transmitted by

ticks

5

Which of the following is the correct pairing of rickettsial pathogen and vector?

R prowazeki; louse

6

Transovarian transmission is a process in which

an infected female vector transmits the pathogen to the eggs forming in its ovaries.

7

Rickettsiosis is caused by Rickettsia rickettsii, a pathogen that

infects the lining of blood vessels and leads to leaking of plasma into tissue.

8

Red mites (chiggers) spread _____ among both humans and rodents.

Orientia tsutsugamushi

9

Rickettsia prowazekii is transmitted by

the human body louse Pediculus humanus

10

Which of the following statements regarding Ehrlichia is FALSE?

It usually causes a spotted rash similar to Rocky Mountain spotted fever

11

Epidemic typhus can recur many years after an initial episode; the recurrent disease is called

Brill-Zinsser disease

12

Which of the following diseases is considered an emerging disease because it was unknown before 1987?

human monocytic ehrlichiosis

13

Which of the following microorganisms have been referred to as energy parasites?

chlamydias

14

Endosomes filled with multiplying chlamydia are known as

inclusion bodies

15

Which of the following pairs is MISMATCHED?

elementary bodies; dormant noninfectious form

16

Which of the following is the cause of the STD lymphogranuloma venereum?

Chlamydia trachomatis

17

Which of the following is an intracellular parasite of humans that usually causes a mild pneumonia?

Chlamydophila pneumoniae

18

Among adults Chlamydia trachoma's is an STD, but among children who are not sexually active it can cause ocular infections which may be spread

by fecal contamination or respiratory droplets

19

The sexually transmitted invasive form of chlamydia

is caused by the LGV strain of Chlamydia trachomatis

20

Which of the following statements regarding trachoma is FALSE?

It is most often a disease of adults who suffer from sexually transmitted chlamydia

21

Sexually transmitted chlamydia is similar to infection with Yersinia pestis in that they both can produce

buboes

22

Which of the following pairs is MISMATCHED?

Chlamydia trachomatis; pneumonia

23

Which of the following is TRUE of spirochetes?

they are able to penetrate a hosts tissues

24

Which of the following is the correct sequence for stages of Ehrlichia development in infected host cells?

elementary body, initial body, morula

25

Which of the following is a zoonosis caused by a spirochete?

leptospirosis

26

Treponema palladium can be transmitted

both through sexual intercourse and from an infected mother to her unborn child

27

Which of the following statements concerning the causative agent of syphilis is TRUE?

It is a large helically coiled bacterium motile by means of endoflagella.

28

The typical lesion of primary syphilis is

a painless reddened lesion called a chancre at the site of infection.

29

The Ixodes tick can become infected with Borrelia burgdorferi

either as a larva or a nymph

30

The signs and symptoms of infection with Helicobacter pylori are the result of

invasion by H. pylori into the mucosa of the stomach

31

What characteristic of Borrelia burgdorferi makes it an unusual bacterium?

It utilizes manganese instead of iron in its proteins and enzymes.

32

Leptospira interrogates gets its name from

the fact that one end of the spirochete is curved like a question mark

33

What characteristic does Vibrio share with Salmonella?

Both have O polysaccharide antigens

34

The most important virulence factor of Vibrio cholerae is

its ability to produce a potent exotoxin

35

A young woman who was recently hiking in the mountains and discovered a tick on her torso has a fever that came on quite suddenly. She has no rash, but she develops leukopenia. Which of the following diseases is she most likely to have contracted.

anaplasmosis

36

Which of the following causes pinta, a skin disease primarily of children, in which spirochetes are detectable in specimens from the lesions?

Treponema carateum

37

This patten of fever is most commonly seen with

relapsing fever

38

Epidemic typhus, spread by lice, is caused by

Rickettsia prowazekii

39

The intracellular parasite ______ can infect mucous membranes in various organ systems of the body.

Chlamydia trachomatis

40

The bacterium ________ is a common cause of bacterial gastroenteritis contracted from contaminated food, especially poultry.

Campylobacter jejuni

41

Parrot fever caused by ______ is usually a pneumonia like disease but can sometimes lead to hepatitis or endocarditis.

Chlamydophila psittaci

42

The STD characterized by three distinctly different symptomatic stages is the result of infection with

Treponema pallidum pallidum

43

Gastritis from infection of the stomach wall with ______ can cause inflammation leading to peptic ulcers.

Helicobacter pylori

44

A gastroenteritis which usually resolves in 72 hours is contracted from eating shellfish contaminated with

Vibrio parahaemolyticus

45

Infection with ______ produces symptoms similar to RMSF, except for the rash making it difficult to diagnose.

Anaplasma phagocytophilium

46

Wounds contaminated with Vibrio (cholera/ parahaemolyticus/ vulnificus) can lead to potentially fatal septicemia.

vulnificus

47

If the mother has (chlamydia/syphilis) at the time of birth, the pathogen can infect the newborn's eyes and may cause blindness.

Chlamydia

48

The rash characteristic of RMSF starts on the (head/limbs/torso).

limbs

49

Rickettsia (prowazekii/ rickettsii/ typhi) is fatal to its vector within 2-3 weeks, preventing transovarian transmission.

prowazekii

50

Scrub typhus is transmitted to humans by mites infected with (Anaplasma/ Orientia/ Rickettsia).

Orientia

51

A disease of birds that can be transmitted to humans is (campylobacteriosis/ lyme/ ornithosis).

ornithosis

52

The infectious form of chlamydia is the (elementary/ initial) body.

elementary

53

Major pandemics of severe diarrheal disease have been caused by Vibrio (cholerae/ parahaemolyticus/ vulnificus) for centuries.

cholerae

54

The reservoir for Orientia tsutsugamushi is (humans/ mites/ rodents).

mites

55

The characteristic lesion for tertiary syphilis is the presence of (gummas/ necrosis/ granulomas) in bones in nervous tissue or on the skin.

gummas

56

A nonverneral treponema disease transmitted by contaminated eating utensils and primarily affects children in Africa, Asia, and Australia is known as (bejel/ pinta/ yaws)

bejel

57

Borrelia burgdorferi is an unusual bacterium that lacks iron containing enzymes and proteins and causes (Brill-Zinser/Lyme/ RMSF) disease in humans.

Lyme

58

Louse-borne relapsing fever is caused by a spirochete known as Borrelia (burgdorferi/ recurrentis/ species), which is capable of frequently changing its antigenic surface components.

recurrentis

59

Leptospira interrogans exits the body in (feces/ aerosols/ urine).

urine

60

The normal habitat for Vibrio cholerae is (humans /animals/ water).

water


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