Plague

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updated 4 years ago by krsbai
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1

What is the genus and species name of plague

Yersinia pestis

2

What is the gram reaction of plague

Gram negative

3

What is the cell shape of plague

bacillus

4

Does plague bacteria produce spores

no

5

Can plague reproduce in macrophages

yes

6

What is unusual about the staining properties of plague bacteria

bipolar staining gives a safety pin appearance

7

What is the virulence factor of plague bacteria in humans

reproduce in macrophage
forms capsule intracellulary at 37degrees

8

According to theories, when and how did plague reach the americas

in 1900s plague reached San Francisco via infected rats carried by ships

9

What is the biological vector for Plague and what is the affect of Plague on the vector

flea, causes their blood to clot

10

Does the biological vector always die as a carrier of plague bacteria?

no

11

At what temperature can plague bacteria form coagulase

29degree Celsius

12

Can plague bacteria be transmitted person to person through contaminated air droplets

yes

13

Why is plague known as the black death (what form of human plague does this disease name refer to?

known as black death because it can cause hemorrhaging and subcutaneously cause purple-blue patches
Septicemic Plague

14

Can plague be found in the wildlife population of Texas

yes

15

What animals in the US serve as a reservoir for plague bacteria

wild mice, rabbits, moles, skunk, prairie dogs, rats, rarely but sometimes cats

16

Do all animals die from plague infection

no

17

Where is the four corners of the USA

new mexico, arizona, utah and colorado

18

What is the theory as to how plague reached the North America

rats carried by ships

19

What are the 3 forms of human plague

bubonic
septicemic
pneumonic

20

Which form of plague is most deadly

pneumonic

21

What is a buboe and which form of plague causes buboes

Buboes is a swollen lymph node and found in Bubonic Plague

22

What are the clinical symptoms of Bubonic Plague

fever, chills, headache, then form buboes

23

What are the clinical symptoms of Septicemic Plague

hemorrhaging causing purple-blue patches, can be gangrenous

24

What are the clinical symptoms of Pneumonic Plague

Severe form of pneumonia with rusty sputum

25

Is plague contagious person-to-person? If so, what form of human plague is contagious?

yes
Pneumonic

26

How prevalent is Plague in the US? Worldwide?

US- 5-15 cases/year
Worldwide- 1700 cases/year

27

Which form of plague would most likely be used in bioterrorism

Pneumonic Plague

28

Is there a vaccine for plague and is it effective?

Yes but not very effective.

29

What is the treatment for plague?

Streptomycin injected and cipro/tetracycline orally

30

Is there immunity after recovery from plague infection

there is some immunity but not permanent. It is not well understood and reinfection is possible


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