Plesiomonas shigelloides Flashcards
gram
respiration
shape
oxidase
motility
host range
habitat
opportunistic?
zoonosis?
catalase
oxidase
indole
gram negative
facultative anaerobe
rod
oxidase positive
motile – polar and lateral flagella
wide range of hosts
found in freshwater, limited to tropical and subtropical regions
opportunistic pathogen of fish and reptiles
zoonotic potential
catalase positive
oxidase positive
indole positive
how many species in the genus
plesiomonas shigelloides is the only species in the genus
unique about it and oxidase
the only oxidase positive member of enterobacteriaceae
transmission to humans
ingestion of contaminated water or seafood
contact with infected animals
virulence
enterotoxins
LPS
hemolysin
iron acquisition
when does infection occur in humans
2-5 days after ingestion of contaminated food or water
diseases in humans
gastroenteritis – watery diarrhea, vomiting, fever, abdominal pain
bacteremia and septicemia uncommon
lesions
hemorrhagic congestion
hemorrhagic ascites
decolorization of liver
splenomegaly
air bubbles in stomach
diagnosis
isolation and identification
blood agar
macconkey
hektoen enteric agar
hemolytic or non hemolytic on blood agar
colorless on macconkey – non lactose fermenter
green on hektoen enteris – no use of carbohydrates
blood agar
macconkey
hektoen enteric agar
hemolytic or non hemolytic on blood agar
colorless on macconkey – non lactose fermenter
green on hektoen enteris – no use of carbohydrates
treatment
may not be required
antibiotics
rehydration
can you use penicillin to treat
no, resistant to penicillin because beta lactamase producer
