Plague
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history
- Justinian plague
- possibly from Africa
- Black death
- from Asia
- 19th century pandemic
- from China through Hong Kong
pathogen
- Yersinia pestis
- gram negative bacili ("cocco-bacilli")
- sylvatic plague
- wide range of wild rodents, rabbits, squirrels, etc.
- urban plague
- black rat Rattus rattus
epidemiology
clinical features
- "bubo" - prominent lymphadenopathy
- very much painful
- incubation 2-7 days after flea bites or close contact to contaminated animal secrete
- bubonic plague
- septicemic plague
- meningitis may occur
- pneumonic plague