Mycoplasma, chlamydia, rickettsia, spirochetes, and curved rods (complete) Flashcards Preview

DMD 5245 > Mycoplasma, chlamydia, rickettsia, spirochetes, and curved rods (complete) > Flashcards

Flashcards in Mycoplasma, chlamydia, rickettsia, spirochetes, and curved rods (complete) Deck (73)
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1

What are the smallest free living microbes

Mycoplasmas

2

What are three significant structures that most bacterial organisms have, but mycoplasmas do not

cytochromes
enzymes of the krebs cycle
cell walls

3

What is necessary for the groth of mycoplasmas

cholesterol (sterols)

4

Where do you usually find colonized mycoplasmas in the human body

the mucus membranes or respiratory and urinary tracts

5

What is the mycoplasma that causes walking pneumonia

mycoplasma pneumonia

6

what is another name for walking pneumonia

primary atypical pneumonia

7

Where does mycoplasma pneumonia attach

to receptors at the bases of cilia on respiratory epithelial cells

8

What is different about walking pneumonia (primary atypical pneumonia) caused by mycoplasma pneumoniae

it causes a fever, headache, and sore throat those aren't typically pneumonia symptoms

9

how is walking pneumonia spread

by nasal secretions among people in close contact

10

how serious is walking pneumonia

it is usually not severe enough to require hospitalization and death

11

Why is diagnosis difficult for mycoplasma pneumoniae

because they are small and slow growing

12

why is treatment of walking pneumonia difficult

because patients can be infected for a long time without signs or symptoms

13

how big is rickettsias

Extremely small

14

what is the cell wall of rickettsias like

it has such a small amount of peptidoglycan that it appears almost wall less

15

Rickettsias are OBLIGATE INTRACELLULAR PARASITES, what is unusual about them?

it is unusual that an obligate intracellular parasite has functional genes for:
protein synthesis
ATP production
and reproduction

16

What are the four genera of rickettsia that cause disease in humans

Rickettsia
Orienta
Ehrlichia
Anaplasma

17

What causes rocky mountain spotted fever

Rickettsia Rickettsii

18

How is Rocky mountain spotted fever (Rickettsia Rickettsii) transmitted

it is transmitted by infected wood ticks (hard ticks)

19

What causes epidemic typhus

Rickettsia Prowazekii

20

What is the primary host of rickettsia prowazekii

humans

21

how is Rickettsia Prowazekii transmitted

by infected lice (when their feces is rubbed into a bite)

22

what is the mortality rate of epidemic typhus without treatments

70%

23

What is it called when epidemic typhus occurs many years later

Brill-Zinsser disease

24

What is the structure of chlamydial cell walls

Two membranes without any peptidoglycan between them

25

Chlamydias are obligate intracellular parasites, but where inside the cell do chlamydias grow

only within the vesicles of host cells

26

What is unique about Chlamydia's developmental cycle

it involves two forms Elementary Bodies (EB) and Reticulate Bodies (RB).
1. EBs enter the cell via endocytosis
2. EB converts into RB
3. RB rapidly divides
4. Most RBs convert back into EBs
5. EBs are released from the host cell

27

how is chlamydia diagnosed

with a direct fluorescent Ab test

28

What is the bacteria that causes a sexually Transmitted disease and Trachoma

Chlamydia Trachomatis

29

What is the problem associated with the chlamydia STD

Lymphogranuloma veneruem

30

what strain of chlamydia trachomatis causes lymphogranuloma veneruem

the LGV strand of chlamydia trachomatis