Plague Flashcards

1
Q

Plague is mainly a disease of ____

A

rodents

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2
Q

most severe Plague in history

A

Black Death
(75-200M deaths)

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3
Q

3 biovars of Plague

[ amo ]

A

Antiqua
Medievalis
Orientalis

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4
Q

2 biovars in Central Asia

A

Antiqua & Medievalis

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5
Q

biovar in Africa

A

Antiqua

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6
Q

biovar that is widespread

A

Orientalis

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7
Q

most affected place due to Plague

A

Madagascar (endemic)

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8
Q

(2) preferred season of Plague

A
  1. summer
  2. spring

warm temp
high relative humidity

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9
Q

Occurence of Plague

A

• remote places
• delay in dx & tx

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10
Q

Natural disaster & destruction of habitat caused widespread of ___, increasing Plague transmission.

A

fleas

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11
Q

Incidental host for plague

A

Humans

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12
Q

Plague

vector —
IH —

A

vector — fleas
IH — rodents

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13
Q

optimal growth temp of Plague

A

30 C (capable at 4C — 41C)

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14
Q

What fomites can Plague survive in? (2)

A

soil
steel

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15
Q

ID of Plague?

clue - low

A

1 - 10

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16
Q

(4) diseases of Plagues in HUMANS

A
  1. Bubonic
  2. Septicemic
  3. Pneumonic
  4. Rare
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17
Q

(2) diseases caused by flea bite

A
  1. Bubonic
  2. Septicemic
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18
Q

more common septicemic form

A

2 Septicemic (secondary)

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19
Q

(1) primary septicemic form

[ ehp ]

A
  1. epistaxis
  2. hematuria
  3. petechiae
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20
Q

the zoonotic Plague

A

Septicemic form

21
Q

Human-Human transmission Plague caused by:

primary — INHALATION
secondary — infected blood to LUNGS

A

Pneumonic form

22
Q

most common Plague

23
Q

self-limiting plague

A

Rare form (pestis minor)

24
Q

Plague that causes swollen femoral lymph nodes as clinical signs

A

Bubonic form

25
Plague bacteria per: • blood meal — • bite —
• blood meal — 300 • bite — 20,000
26
Plague case fatality of bubonic form w/o treatment
50-70%
27
Plague case fatality of Bubonic form with treatment
10-15%
28
Plague case fatality of Septicemic form with treatment
40%
29
(2) with 100% case fatality rate w/o treatment
1. Septicemic 2. Pneumonic
30
100% case fatality rate with or w/o tx
Pneumonic form
31
(3) Case definitions of Plague [ San Pablo City ]
1. Suspected 2. Presumptive 3. Confirmed
32
Case definition involved in • clinical signs • epidemiological feature • flea bite evidence • travel to endemic places in previous 10 days
Suspected case
33
consistent with 2 out 4 positive tests • gram negative coccobacilli • Wayson / Giemsa • F1 antigen (ELISA / dipstick) • single anti-F1 serology
Presumptive case
34
In serologic tests, any previous exposure of Plague leads to?
false-POSITIVE
35
case with 2 out of 4 positive BACTERIAL CULTURE
Confirmed case
36
(2) virus used in lysis of bacteria ng Plague • 20-25C • 37C
1. Podo-viridae 2. Myo-viridae
37
Biochemical profile of Plague IMViC
IMViC ( - | + | - | - ) catalase = (+)
38
most common form of Plague in CATS
bubonic form
39
resistant to Plague
rodents
40
Type of plague for GOATS & CAMEL
OCULAR plague
41
type of hemorr septicemia in rodents with Plague
Subclinical / Fulminant
42
Not known to develop Plague x CHiPS x
Cattle Horse Pig Sheep
43
stains for Plague (2)
1. Wright-Giemsa 2. Wayson
44
samples for nutrient agar of Plague (3)
1. blood 2. bubo aspirates 3. sputum
45
interval of latex agglutination for Plague
1 - 2 weeks interval
46
most important prevention for Plague
early diagnosis
47
1st line of antibiotics for Plague
Cotrimoxazole
48
other antibiotics for Plague [ sdc ]
Streptomycin Doxycycline Chlorampenicol
49
route of vaccine for high risk group of Plague give interval
IM (weeks 1, 5, 6)