Micro - Gram Negative Bacteria VI Flashcards
yersinia pestis
causes bubonic plague
- gram negative rod
- bipolar staining pattern
vector is flea
F1
virulence factor in yersinia pestis
-antiphagocytic
V and W antigens
virulence factors in yersinia
gram negative rod with bipolar staining pattern
yersinia pestis
swollen lymph node, hot, red, and painful
- fever and headache
- blackish discoloration of skin (hemorrhages)
- death without treatment
bubonic plague
patient camping in arizona or new mexico with a fever
suspicous of bubonic plague
-yersinia pestis
francisella tularensis
tularemia
handling rabbits and bites of ticks and deerflies
handling rabbits
francisella tularensis
ulceroglandular tularemia
following bite of tick or deerfly, or contact with rabbit
well-demarcated hole in skin with black base develops
-swollen nodes, red, painful
pneumonic tularemia
skinning of rabbit
- get lung infection
- francisella tularensis
diagnosis of franciscella tularenis
very virulent
-do not culture or drain lymph node
Dx - based on clinical picture, skin test, and titers for antibodies to francisella tularenis
brucella
causes brucellosis
-gram negative bacilli
acquired from animal contact, meat, or milk products
worker in meat packing industry, veterinarian, traveler who consumes dairy in Mexico
possible brucella infection
undulant fever
slow rise in temperature and returns to normal by morning
-brucella infection
pasteurella multocida
gram negative rod
- not facultative intracellular organism
- colonizes mouth of cats
