2020-03-28
  • 11:57 am Perfect Aquarium, Hospital Tank, or Quarantine? Everything Perfect to Make or Keep Fish Healthy
  • 11:55 am Old Dog Tremors – Is it Normal For My Dog’s Leg To Tremor?
  • 3:37 pm Necropsy Video
  • 1:35 pm Hand Sanitizer? No I Like Ethanol Spray Better
  • 1:16 pm Why I Don’t Like Gloves For Contagion-Containment-Avoidance
  • 11:54 am Praziquantel Doesn’t Work Anymore Against Flukes?

Dr Johnson, I got your address from my friend Jason who you recently helped with a pecan nut problem. I may or may not have a KHV problem. If I can give you the story I hope you can tell me if there is anything I should do. I dug a pond last fall and […]

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CARP POX Note: Carp Pox should be differentiated from other viral and non viral eruptions with a microscope. In very cold water, there are strains of Ich which will coalesce into large gel-like globs instead of causing the dusting of white spots. Biopsy is important. Carp Pox and certain cancers cannot be differentiated by pathologists […]

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When confronted by KHV, you can expect high mortalities. In other words, a realistic expectation would be that more than fifty percent of your fish are going to end up perishing. Should that scare you? No. It should “aware” you. If there’s something you can do to stop the losses, should you? Would you? The […]

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Here’s why I’m sure that Heat denatures and eliminates the Koi Herpes Virus. The Israelis wanted an “immune” fish. So they infected the Koi and then when they were symptomatic, they heated them to 83-84 dF to clear them. But that wasn’t long enough to generate antibodies. So they re-infected them. And then when they […]

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Koi Herpes Virus KHV Cured or Treated This article is dedicated to my personal friends, Brenda and Charlie Atwell, whose pond contracted KHV and was essentially wiped out, after re-introducing some fish which were returned to them, after a breeding-loan. The koi hobby has been rocked by a fearsome virus which everyone seems to be […]

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What if two smart people got together to clarify some points of public concern regarding Koi Herpes Virus? Well that’s what happened and we got a lot of information out there. Of course new information emerges all the time but here is what we knew back then. It’s an interesting read. KHV Dialogue – Dr. […]

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A fomite is an inanimate object. The object, functioning as a fomite spreads a disease. For example, the common cold is spread on doorknobs among other things. The doorknob is a fomite. The question was raised about fomite spreasd of KHV and SVC and I took the question to the highest authority on the viruses […]

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It’s not ‘all the time’ that someone documents a KHV outbreak this thoroughly. I’m moticing things like the onset of disease, the source of the fish, the commencement of heating the fish to 82+ DF and the cessation of mass mortality after that. Koi Herpes Virus – Disease Course Written by Dr Erik Johnson and […]

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Overview: Koi are generally hardy fish. They’re descended from the common carp and are tough, essentially omnivorous fish with the ability to withstand a range of living conditions. As an ornamental specimen, the Koi is beautiful, and sought after for it’s highly strained color varieties. Koi health and disease is essentially a balancing act or […]

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APHIS To Indemnify Damages for SVC to Breeders or Sellers, APHIS has released the following document that identifies the circumstances that they will, although unfunded and unable to pay, remunerate breeders and sellers of Koi and pond fish for livestock destroyed in their SVC eradication program. https://drjohnson.com/wp-content/uploads/2019/10/APHIS_SVC-IndemnityMovement-FinalRuleSVC.pdf

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Lymphocystis – by Doc Johnson Of all the viruses affecting Koi, the fifth most common is LYMPHOCYSTIS. This is a viral pathogen that is poorly transmissible between your specimens. It strikes fish when some damage has occurred to mouth or fin, and sometimes on the body* (Almost exactly like Carp Pox). The lesions are warty, […]

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