Plague Flashcards
1
Q
Causative agent of plague
A
Yersenia partis
2
Q
Characteristic of the causative agent
A
is a Gram-negative,
rod-shaped coccobacillus,
a facultative anaerobic organism
3
Q
Vector of plague
A
Oriental rat flea
4
Q
Incubation period
A
2-6 days
5
Q
Types of plagues ( clinical types )
A
Bubonic plague
Septicemic plague
Pneumonic plague
6
Q
Features of bubonic plague
A
General malaise Fever Muscle aches Gangrene Headache and chills occur suddenly at the end of the incubation period Extreme weakness Swelling of lymph nodes resulting in buboes, the classic sign of bubonic plague. Most flea bites will occur on the legs, so the inguinal nodes are most frequently affected Death can occur in less than 2 weeks
7
Q
Features of septicemic plague
A
Necrosis of extremities Nausea Vomiting Diarrhea Abdominal pain Hypotension Hepatosplenomegaly Delirium Seizures in children Shock General malaise Fever Symptoms of bubonic or pneumonic plague are not always present
8
Q
Features of pneumonic plague
A
Fever Chills Coughing Chest pain Sneezing Rapid breathing Dyspnea Hemoptysis Lethargy Hypotension Shock Symptoms of bubonic or septicemic plague are not always present 100% mortality if not treated
9
Q
Reservoir of pest is
A
Rodents
10
Q
Transmission of plague
A
Flea bite
Direct animal contact
Aerosol
Human cases
11
Q
Diagnosis
A
Geimsa and wayson staining
Culture
Serological
12
Q
What is wayson staining procedure ?
A
Modified methyline blue stain.
Yersenia pestis appears purple with a safety pin appearance.
