Yersinia Flashcards
1
Q
yersinia info
A
- gram negative
- bipolar staining bacilli
- grows aerobically
- non-motile
- adapts to wide range of temperatures
2
Q
3 types of yersinia
A
- enterocolitica
- pseudotuberculosis
- petsis
3
Q
species y pestis infects
A
- not a disease of domestic animals
- carnivores can be infected but rarely develop clinical signs
- cats increased susceptibility
- natural infection of goats
- humans infected
4
Q
plague history
A
- killed 1/4 of europe’s population in middle ages
- endemic plague since biblical times
- pandemic plague in china in 1860s, spread
- has killed more people than many wars
- india affected in early 1900s, vietnam during the war
5
Q
types of human plague infections
A
- bubonic (flea bites –> bubos)
- septicemic (generalized infection)
- pneumonic (person to person spread, lungs swollen)
6
Q
plague in domestic cats
A
- infected more frequently than other domestic animals by rodent fleas
- enlarged lymph nodes, abscesses, lethargy, fever
- suppurative pneumonia
- can infect humans
7
Q
plague and dogs
A
- react only with fever
- risk of human infection is unknown
8
Q
treatment/control of y pestis
A
- vaccine was discontinued
- sensitive to light and heat, bleach is effective
9
Q
y pseudotuberculosis
A
- primarily an animal pathogen
- affects rodents, turkeys, goats, pigs, cattle, sheep, wild birds, deer, humans
- acute mesenteric lymphadenitis in humans, fever
- fatal septicemia in animals
- cats: urinary tract disturbances
10
Q
y enterocolitica
A
- foodborne pathogen
- infection of wild and domestic animals
- humans: mild and severe gastroenteritis, inflammation of mesenteric lymph glands
- common among children
