Chapter 11 Flashcards Preview

Microbiology Chapters > Chapter 11 > Flashcards

Flashcards in Chapter 11 Deck (39):
1

Chlamydia

*

An atypical bacteria with 2 unusual characteristics:

1.  An obligate intracellular parasite.

2. A 2 stage life cycle...

       a) infectious stage-elementary body

       b ) reproducing intracellular stage-reticulate body

 

2

Chlamydia trachomatis

*

Significant pathogen for humans specifically this species is responisible for more than one major disease.

  • Trachoma-eye disease of adults & children, causes blindness

 

  • Inclusion conjunctivitis-transmitted at birth from mother carrier of disease to baby causing eye infection of newborn

 

  • Non-gonococcal urethritis- Sexually transmitted infection.

3

Elementary body

*

The first, infective,and environmentally resistant stage of Chlamydia

4

Inclusion conjunctivitis

*

caused by Chlamydia trachomatis

known as an eye infection of newborns from the infected mother during delivery.

5

Mycoplasma

*

An atypical bacteria that lacks a cell wall, highly pleomorphic (no structure, no shape) and is able to squeeze through filters.

6

Filterable

*

Some bacteria such as Mycoplasma are so small in size they are allowed to pass through filters that retained bacteria.

Therefore, some bacteria are said to be filterable.

7

Mycoplasma pneumoniae

*

Causes a disease known as walking pneumonia, a common form of mild pneumonia.

8

Non-gonnococcal urethritis

*

Caused by the bacteria, Chlamydia trachomatis, non-gonnococcal urethritis is the sexually transmitted infection.

9

Obligate intracellular parasite

*

An organims that must get into a host to replicate, in this Chapter 11 we look at the unusual bacteria groups Rickettsias and Chlamydia as obligate intracellular parasites.

10

Pleomorphic

*

Having many shapes, characteristic of certain bacteria such as Mycoplasmas. They may lack a cell wall and have flexability.

11

Reticulate body

*

The intracellular growing stage of chlamydiae.

Part of the life cycle.

After the elementary body stage the reticulate body developes, matures, divides, then develope back into elementary bodies.

 

12

Rickettsia

*

An unusual bacteria group that are obligate intracelluar parasites. Arthropods like ticks serve as a hosts and vectors then they lose infectivity after leaving the host.

Rocky Mountain Spotted Fever is an example of disease from rickettsiae.

13

Sterols

*

Strengthens cell membranes...

example is mycoplasma that lack a cell wall uses sterols to strengthen their cell membranes.

14

Trachoma

*

Caused by, Chlamydia trachomatis, trachoma is the infection of the eye of both adults and children. One of the most common causes of blindness in humans in the less developed countries.

15

Vectors

*

In the case of spreading disease, a vector is an organism that transfers disease from one host to another organism.

A tick or mosquito can be used as examples, they pick up disease and deposit it.

16

walking pneumonia

*

A mild case of pneumonia, it can also be called atypical pneumonia because the disease is different than the more serious cases of pneumonia caused by the typical bacteria, Mycoplasma pneumoniae.

17

Zoonoses

*

Animal infections passed to humans.

 

Rabies, Rocky Mountain Spotted Fever, and Lyme Disease are examples of zoonoses.

18

1. Which of the following lacks a cell wall?
A) Borrelia
B) Mycoplasma
C) Mycobacterium
D) Clostridium
E) Nocardia

B.  MYCOPLASMA 

19

2. Rickettsias differ from chlamydias in that rickettsias …
A) Are gram-negative.
B) Are intracellular parasites.
C) Require an arthropod for transmission.
D) Form elementary bodies.
E) Lack cell wa
lls.

C. FORM ELEMENTARY BODIES

20

3. Which of the following statements about the causative agent of Rocky Mountain spotted fever is false?
A) It is an intracellular parasite.
B) It is transmitted by ticks.
C) It is in the genus Rickettsia.
D) It is gram-negative.
E) It is found in soil and water.

E. IT IS FOUND IN SOIL AND WATER

21

Which of the following lacks a cell wall?

A) Borrelia

B) Mycoplasma

C) Mycobacterium

D) Clostridium

E) Nocardia

 

B) Mycoplasma

22

Rickettsias differ from chlamydias in that rickettsias
A) Are gram-negative.
B) Are intracellular parasites.

C) Require an arthropod for transmission.
D) Form elementary bodies.
E) Lack cell walls.

C) Require an arthropod for transmission.

23

Which of the following statements about the causative agent of Rocky Mountain spotted fever is false?
A) It is an intracellular parasite.
B) It is transmitted by ticks.
C) It is in the genus Rickettsia.
D) It is gram-negative.
E) It is found in soil and water.

E) It is found in soil and water.

24

A.M.


 

25

What is the main difference between Chlamydia and Rickettsias?

SR

Rickettsias cannot survive in the environtment, it is vector borne.

 

Chlamydia can survive the transfer from human to human

26

What is vector borne?

 

SR

lose infectivity outside of the host

27

What are the smallest free living microbes in humans?

 

SR

Chlesterol

28

What is the key unique characteristic of Chlamydia?

 

                    SR

It has a two stage life cycle

Interactive- elementary body

Reticulate- reproductive

29

What disease is known in the Rocky Mountian area?

 

 

                 SR

Spotted Fever

30

What is the main difference between Chlamydia and Rickettsias?

SR

Rickettsias cannot survive in the environtment, it is vector borne.

 

Chlamydia can survive the transfer from human to human

31

What is vector borne?

 

SR

lose infectivity outside of the host

32

What are the smallest free living microbes in humans?

 

SR

Chlesterol

33

What is the key unique characteristic of Chlamydia?

 

                    SR

It has a two stage life cycle

Interactive- elementary body

Reticulate- reproductive

34

What disease is known in the Rocky Mountian area?

 

 

                 SR

Spotted Fever

35

JLW: What are the smallest free-living microbes?

mycoplasmas

36

JLW: Colonies of what have a fried egg appearance?

mycoplasmas

37

JLW: Obligate intracellular parasites lose infectivity quickly after leaving ____?

a host cell

38

JLW: Rickettsia are zoonoses which are....

animal infections passed to humans

39

JLW: The 3 types of atypical prokaryotic cells are... 

mycoplasmas

chlamydia

rickettsias