Exam 4: Gram Negative Fish Pathogens Flashcards
Describe motile aeromonads
Cytochrome oxidase positive
Ferment glucose with or without the production of gas
Resistant to vibriostatic agent 0/129
What is the serology of motile Aeromonas like?
Heterogenous
What species of Aeromonas have the most predominant clinical isolates that are typically associated with fish?
A. hydrophila
A. sobria
A. caviae
What is among the most common bacteria in freshwater habitats? What does it cause?
A. hydrophila
Disease among cultured and feral fishes
In the US, what do motile aeromonads primarily cause disease in?
Cultured warm water fishes: minnows, bait fishes, carp, channel catfish, striped bass, largemouth bass, and tilapia
What is Aeromonas primarily restricted to?
Fresh water environments, but it has been isolated from brackish water species
What do aeromonads also compose part of?
The normal intestinal microflora of healthy fish
What is the disease associated with Aeromonas?
Bacterial hemorrhagic septicemia and/or ulcerations
What happens in the acute form of disease with Aeromonas?
A fatal septicemia may occur so rapidly that fish die before they have time to develop anything but a few gross signs of disease
What do epidemic A. hydrophila isolates have that indicated they were present in the loss of 8 million pounds of catfish?
A unique biochemical and molecular phylogenetic
Read Virulent A. hydrophila
Read Virulent A. hydrophila
