What would you suggest for ulcers on koi caused by two types of bacteria infections Aeromonas and Pseudomas?

I received this as a query:

If I may please if you don’t mind what would you suggest for ulcers on koi caused by two types of bacteria infections Aeromonas, Pseudomas” when not even bytral and treating the water with anti parasite meds plus salt does not work .

My response:

I’m confused about what pathogen you’re dealing with. Ectoparasites, or bacterial? If bacterial only, and if it’s either Aeromonas or Pseudomas, these are notorious for being multidrug resistant. So you must be guided by results from bacterial culture and antibiotic sensitivity tests.


Yours sincerely,

Dr Richmond Loh
DipProjMgt, BSc, BVMS, MPhil (Pathology) Murdoch, MANZCVS (Aquatics& Pathobiology), CertAqV WAVMA.
The Fish Vet, Perth, Western Australia.
Veterinary Medicine for fish.
W: http://www.thefishvet.com.au
E: thefishvet
P: +61 (0)421 822 383

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