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Microbiology 2nd Block > Ricketssia > Flashcards

Ricketssia Flashcards

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1
Q

Ricketsia is a bacteria that is transmitted through

A

Vector

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2
Q

Ricketsia bacteria only stains with

A

Giasma stain
Gumenez stain
Acridine orange

Doesn’t stain with normal stain

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3
Q

The Ricketsia Bacteria is what shape

A

Pleomorphic Bacillius

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4
Q

Is Ricketsia gram positive or negative

A

Negative

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5
Q

Ricketsia bacteria only grows in

A

Embryonated eggs
And cultured medium

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6
Q

In the yolk sac of embryonated egg, the agent of rash grows where ??

A

In the cytoplasm

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7
Q

In the yolk sac of embryonated egg, the agent of thypus grows where ??

A

In the nucleus

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8
Q

Ricketsia bacteria are easily destroyed by ———— except

A

Heat and drying except C. Burnetti which is heat resistant and R.prowazekki in dried up lice pooo

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9
Q

Which bacteria is responsible for Rocky Mountain spotty fever??

A

Ricketsia rickestii

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10
Q

How is RMSF(Rocky Mountain spotted fever) transmitted ??

A

Through infected tick to tick via transovarian
By blood feeding on human via infected tick

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11
Q

The characteristics symptoms of RMSF infection is

A

Rashes starting in the wrist and ankle before moving to the trunk
And can also present with vasculitis

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12
Q

Diagnosis for RMSF infection is

A

Weil Felix test

And clerking for tick exposure

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13
Q

Weil Felix test implies

A

A test done to check Rocky Mountain spotted fever, a Ricketsia ricketsii infection

Where the antibody for Ricketsia crosslink to antigen of proteus organism ……antigen (OX19 &OX2)

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14
Q

Drugs used to treat RMSF infection is

A

Tetracycline and chloramphenicol

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15
Q

Ricketsia akari causes

A

Ricketsia pox

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16
Q

Ricketsia pox is caused by what bacteria

A

Ricketsia akari

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17
Q

The reservoir for Ricketsia akari is

A

Mouse/mice

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18
Q

The vector for Ricketsia akari is

A

Mite

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19
Q

Ricketsia pox is transmitted through

A

Blood feeding via the vector (mite) on human

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20
Q

Ricketsia pox is treated using

A

Tetracycline

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21
Q

Q-fever is caused by what bacteria

A

Coxiella burnetti

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22
Q

Coxiella burnetti bacteria caused what

A

Q fever

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23
Q

Ricketsia tsutsugamushi causes what dieseas

A

Chigger borne scrub typhus

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24
Q

Chigger borne scrub typhus is caused by

A

Ricketsia tsutsugamushi

25
Q

Ricketsia tsutsugamushi is transmitted by

A

Blood meal through mite bite

26
Q

The reservoir for Ricketsia tsutsugamushi bacteria is

A

Rodents

27
Q

The characteristics of scrub thypus caused by ————- is ————?

A

Ricketsia tsutsugamushi is necrotic ESCHAR bite mark( a black scab at the site of insect bite)

28
Q

Other serious complications that can result from Ricketsia ricketsii is

A

Vasculitis, Thrombocytopenia, DIC , vascular collapse ,heart failure

29
Q

Other serious complications that can result from Ricketsia tsutsugamushi is

A

Lymphadenopathy, heptomegaly, conjunctivitis etc

30
Q

What Proteus antigen responds in Weil Felix test ??

A

Antigen OX19 OX2 OXK

31
Q

R.Tsutsugamushi responds to what proteus antigen in Weil Felix test

A

Antigen OXK

32
Q

R.tsutsugamushi is treated using

A

Tetracycline and chloramphenicol

33
Q

Ricketsia prowazeki causes what disease

A

Typhus

34
Q

R.prowazeki is transmitted through

A

Infected lice

35
Q

Epidemic thypus is caused by what bacteria

A

Ricketsia prowazeki

36
Q

Endemic thypus is caused by

A

Ricketsia typhi

37
Q

What Ricketsia bacteria caused vasculitis

A

Ricketsia ricketsii

38
Q

Which Ricketsia’s vector is lice

A

Ricketsia prowazeki

39
Q

Ricketsia prowazeki attaches to antigen ———of proteus in Weil Felix test

A

Antigen OX19. But not OX2

40
Q

Ricketsia ricketsii attaches to what proteus antigen

A

Antigen OX19 & OX2 AG

41
Q

Ricketsia infection is treated with what drugs

A

Tetracycline and chloramphenicol

42
Q

Brill zinsser is classified as

A

A relapse of louse borne infections after many year of primary infection

Like if prowazeki infection come back to you again
It is called brill zinsser infection

43
Q

Ricketsia typhii is transmitted by what vector

A

By flea

44
Q

What Ricketsia causes murine thypus

A

Ricketsia typhi

45
Q

Which of this Ricketsia infection presents with ESCHAR symptomatically??

Ricketsia typhi
Ricketsia prowazeki
Ricketsia tsutsugamushi
Ricketsia akari

A

Ricketsia tsutsugamushi

46
Q

The only Ricketsia infection that is an airborne infection is ??

A

Coxiella burnetti

47
Q

Coxiella burnetti affects what organ mostly

A

The lungs

48
Q

Corxiella burnetti is transmitted through———

A

Inhalation

49
Q

The reservoir for corxiella burnetti is

A

Sheep cattle goat

50
Q

Ricketsia bacteria divide by

A

Binary fission

51
Q

Ricketsia akari has two phase which are

A

1st phase is
Papillovesicualr rash at site of inoculation, fever then malaise (pain) with systemic syndromes

2nd phase is

Papiloovesicualr rash all over

52
Q

Flea borne typhus is caused by what bacteria

A

Ricketsia typhi

53
Q

Ricketsia growth are enhanced in the prescence of

A

Sulphonamides

54
Q

Doxycycline is an example of tetracycline used to treat

A

Ricketsia infection

55
Q

R.Prowazeki has reservoir in

A

Human

56
Q

R.prowazeki usually occur in the times of

A

War

57
Q

Coxiella burnetti is transmitted by air cus the bacteria divides by

A

Forming spores

58
Q

Ricketsia infection manifest as

A

Vasculitis rash and typhus fever except in Q fever

Microbiology 2nd Block (4 decks)

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