Aeromonas and Plesiomonas

Question 1

Physical description of both these organisms

Answer 1

• G negative
• facultative anaerobe, motile
• aquatic environments
• fish pathogens

Question 2

Clinical presentation of both these organisms

Answer 2

• gastroenteritis most common
• cholera type; watery
• dysentery type; bloody and mucus
• cellulitis from infected wounds
• myonecrosis

Question 3

Epidemiology of Aeromonas and plesiomonas

Answer 3

• transmitted form infected food(seafood) or water
• tissue entry after trauma
• SCUBA
• disease from other org. may be enhanced, rather than direct causative agent

Question 4

Pathogenesis of Aeromonas and plesiomonas

Answer 4

• LPS
• PG toxicity
• ACT toxin; aerolysin-cytotoxin-enterotoxin; lyses cells, increases cAMP
• pili for attachment to gut epithelium

Question 5

Treatment for aeromonas and plesiomonas

Answer 5

• avoid undercooked seafood
• diarrhea self limiting
• immunocomp. and would cellulitis should be treated

Question 6

Drugs to be used for aeromonas and plesiomonas

Answer 6

-SxT, tetracycline