Archive for the 'parasitic diseases' Category

Apr 10 2012

2012 Ornamental Fish Medicine Course, Hatfield Marine Science Center, Newport, Oregon

 

Just finished teaching 1 week intensive Ornamental Fish Medicine Course. Great group of 12 participants: 8 senior veterinary students from OSU, 2 professional aquarists (Oregon Coast Aquarium and Seattle Aquarium), 1 veterinarian from the SEattle Aquarium, and 1 colleague from India ( Dr. Anna Mercy, Kerala College of Fisheries and Ocean Sciences). Great learning experience for all of us. Great exchanges during the lectures, labs, group projects and case studies. Looking forward to next year. Considering expanding to 2 weeks. Thanks to my co-instructors: Dennis Glaze, Dr. Jerry Heidel, Stu Clausen, and Dr. Anna Mercy.

 

Dr. Mercy is from Kerala College of Fisheries and Ocean Sciences, India. She participated in the course but was also kind enough to give two lectures. One lecture addressed the current status of the Indian ornamental fish industry and outreach work she has lead to train ornamental fish farmers. In the second lecture Dr. Mercy discussed some of the common health problems associated with collecting native broodstock  and breeding these fish in captivity. We recorded both of these lectures and you will be able to view them on our YouTube channel soon. I will post the links once the lectures have been posted.

 

Here’s the course outline for the course this year.

 

VMB 727
ORNAMENTAL FISH MEDICINE
April 2-6, 2012
Lead Instructor:
Dr. Tim Miller-Morgan, DVM
Oregon Sea Grant – Aquatic Animal Health
College of Veterinary Medicine
tim.miller-morgan@oregonstate.edu
Co-Instructors:
Dr. Jerry Heidel, DVM, PhD, DACVP, Cert. Fish Pathologist
Dennis Glaze, AAS – Aquarium Science
Stuart Clausen, BS, Cert. Aquarium Science

 

Recommended Texts:
o Wildgoose, W. 2001. BSAVA Manual of Ornamental Fish, Second Edition, BSAVA, Gloucester, UK 304p. Available through Amazon.com and Blackwell Publishing.
o Noga, E. 2010. Fish Disease Diagnosis and Treatment. Mosby, New York. Available through Amazon.com and Blackwell Publishing Roberts, H. 2010.
o Roberts, H. (2010) Fundamentals of Ornamental Fish Health, Wiley-Blackwell, New York. 229p.

 

MONDAY (We’ll start @ 0900)
AM (Old Library)
• Introduction
• Ornamental Fish: Essential Anatomy and Physiology and the Interface with the Captive Environment. (Old Library)
PM
• Clinical approach and procedures (Old Library)
• Laboratory: fish handling, sedation and common clinical procedures (West Wing – AAHTL)

 

TUESDAY
AM
• Laboratory: Review – Components water management systems (Dennis Glaze, West Wing – AAHTL)
• Life Support System Assessment (Old Library)
o Fish Health Cases I (Handout) – water management cases

PM
• Fish Necropsy and Dissection (Lab – TBA, Dr. Jerry Heidel)
• Laboratory: fish handling, sedation and common clinical procedures, cont. (West Wing – AAHTL)

• Evening Lecture – An Overview of the Indian Ornamental Fish Industry (Dr. Anna Mercy)

 

WEDNESDAY
AM
• Common Clinical Problems of Ornamental fish I (Old Library)
• Common Clinical Problems of Pet Fish II (Old Library)

PM

• Common Clinical Problems of Pet Fish II cont. (Old Library)
• Management and treatment of fish disease
• Laboratory: fish handling, sedation and common clinical procedures, cont. (West Wing – AAHTL)
o Fish Health Cases II (Handout) – Medical Cases

 

THURSDAY
AM
• Biosecurity and the Essential Principles of Fish Health Management (Dr. Tim Miller-Morgan)
• Collection, Transport and Acclimation of Ornamental Fish ( Dr. Tim Miller-Morgan)
• Handout Biosecurity consultation problems (Dr. Tim Miller-Morgan and Dennis Glaze)

PM
• Common Health Management Issues Associated with the Production of Native Indian Fish Species (Dr. Anna Mercy)
• Case Discussions I

 

FRIDAY
AM (Old Library)
• Laboratory:
o Assessing fish populations (Oregon Coast Aquarium)
o Handling, sedation and clinical examination of elasmobranchs (Stu Clausen, Oregon Coast Aquarium, Passages of the Deep)
PM (Old Library)
• Biosecurity Consultation problem (Old Library)
• Case Discussions II
• Evaluations

 

2 responses so far

Jan 10 2011

Wet Pet Vet: OSU aquatic veterinarian is the good doctor for fish in captivity.

Just out in the current issue of Oregon’s Agricultural Progress. Nice general discussion of a day in the life of our program, specifically many of my activities  in Newport when I’m not out and about in the state or more far flung regions. I hope you enjoy the article.

No responses yet

Oct 11 2010

NEWS AND LINKS: OCTOBER 11, 2010

  • You may now access all of the abstracts for the papers and posters presented at the Sixth International Symposium on Aquatic Animal Health held in Tampa, Florida, September 5-9th 2010. This international meeting occurs every 4 years. Scientists, aquatic health professionals, industry professionals from all over the world gather for this meeting every 4 years. It’s the Olympics of aquatic animal health.
  • Just published in Reviews of Fisheries Science, Development of Captive Breeding Techniques for Marine Ornamental Fish: A Review.
  • FAO Proposes new Guidelines for Aquaculture Certification. Many of the issues with small-scale producers would certainly apply to the ornamental fish sector. While such certification could be valuable to the ornamental fish industry it seems to me that implementation could  be much more difficult given the huge diversity of species. (What do you think? Could this be done with the global ornamental fish industry? How would you approach this problem? IS the Marine Aquarium Council Certification program for marine ornamentals a good model? TMM)

From Ornamental Fish International (my comments in bold, italics):

  • EU CONSULTATION ON BIODIVERSITY
    The European Union is currently undertaking a public consultation on the EU Biodiversity strategy. This topic is important for our industry as well, as it touches issues like trade legislation (including our trade). EU biodiversity strategy is available from the website: http://ec.europa.eu/environment/consultations/biodecline.htm <http://ec.europa.eu/environment/consultations/biodecline.htm> The objective of this consultation is to gather input from a wide range of stakeholders on possible policy options for the European Union’s post-2010 EU biodiversity strategy, which will be assessed by the Commission as part of the process of its development.
  • VACCINE FOR WHITE SPOT DISEASE (ICH)
    (
    from www.onlineprnews.com)
    Scientists have shown that fish can be immunized against Ich, the ‘white-spot’ disease, but growing the parasite in large quantities for immunization use is problematic.

    Fish can be immunized against Ich, the dreaded “white-spot” disease, that is the bane of home aquarists and commercial fish farmers, government scientists have shown. Although the team still has many obstacles to overcome, the study presented at a Boston meeting of the American Chemical Society indicates for the first time that a protective vaccine is within reach.

    Ichthyophthirius multifiliis, commonly known as Ich, is the most common protozoan parasite of fish. It is characterized by the appearance of white spots, about the size of salt or sugar granules, on the fishes’ skin, and is especially common when fish are grown in crowded conditions. Symptoms include loss of appetite, rapid breathing, hiding or resting on the bottom of tanks or ponds, and rubbing or scratching against objects. The disease kills 50% to 100% of those infected. (
    Here’s a link to a bit more information from Science Daily.TMM)
  • OFI POLL
    In the previous months we had an interesting Poll in the OFI website. The question was: Most important tradeshow for my business is? 43% of the respondents mentioned Interzoo, which in itself considering the size of this show is of course not so surprising. We were pleased to see that the specialized aquatic show Aquarama was second in this list with 41%. This despite the fact that the Poll was on-line before and during Interzoo. The general pet trade show in Las Vegas came out third with 7% and Aquafair Malaysia fourth with 3%. Other shows listed 5%.
  • AUSTRALIA TO RESTRICT IMPORTS?
    To reduce the risk on imports of certain iridovirusses, the Australian government is in the process for developing legislation to address these risks. In July a report was published which can be downloaded here <http://www.ofish.org/files/files/iridovirusses-australia.pdf> . (An interesting read and a chance to see how countries carry out import risk assessments. TMM)

    Main recommendation: restrict imports from disease free countries only, or start batch testing of all poecilids, gouramis and cichlids, which enter Australia. This is about 67% of all Australian imports! The first option seems to be a theoretical option only as exporting countries to Australia will have very serious problems to introduce the required procedures and controls to declare these countries or farms free of the Iridovirusses. Batch testing demands a high number from fish of every batch (all specimens of the same species and origin in the shipment).

    This recommendation will lead to the killing of very, very many healthy fish every year. It will also lead to a huge increase of cost, as importers will have to pay for these fish, for their transport and for the testing. Altogether it is a huge incentive to breeding of fish within Australia. (Also raises the question – could the screening be pushed to producers? THe costs might be lower? But is the disease screening infrastructure available in the countries of origin? Koi imported into the USA must now come from sources certified free of Spring Viremia of Carp Virus. There is a mechanism for this type of screening outlined in the OIE Code and Manual. However, adequate, validated diagnostic tests must be available for screening these fish. TMM)

    Lets hope the Australian authorities will also consider the cost of these recommendations for both importers and government, and the ethical aspects of the ideas of some veterinarians. (THis is a tough balancing act. The Australian authorities must balance the needs of this industry with the need to protect their food fish aquaculture industry and protect their wild fish resources. This is an issue every country must face at some point. How would you address these issues? Remember, even inaction is a decision that may have long-lasting ramifications. TMM)

One response so far

Nov 13 2008

Observations: The world of Koi in Japan – Koi Breeders, Niigata and Hiroshima

We’ve been able to visit about 10 breeders in Japan,  8 breeders in Niigata and one in Hiroshima. Here are a few of my quick impressions/observations so far based upon the visits to these few facilities:

  • Most all of the fish I’ve seen are very healthy and vigorous. I was particularly impressed with the 1 year-olds (tosai). WOW!!, No I don’t have a good eye but from a health standpoint they looked great.
  • Those that appeared “off” were not for sale.
  • Most common diseases appear to be Anchor worm and Columnaris. The columaris is generally a problem when the fish come out of the ponds and move into the greenhouses.
  • Sleeping disease is also a problem. This  disease, which is not well characterized, causes problems primarily with 1-2 year old koi in the Winter months.  The fish tend to lie unmoving on the bottom of the pond. They will swim when stimulated.
  • Costia can also be a problem at times.
  • The government requires testing for Spring Viremia of Carp and Koi Herpes Virus four times a year.
  • Biosecurity concepts are understood and practiced to varying degrees as we see in the US. Most breeders have moved to locked facilities, appear to have separate sets of equipment for each facility and all we visited have foot baths at the entrances (however, actual use seems to vary). few places also have hand wash stations.
  • A couple facilities have quarantine greenhouses into which recently harvested fish are moved for observation and to await testing. 
  • All breeders seem to be very concerned  and try to be conscientious about biosecurity. The level of practice is often related to the actual amount of fish trade (economics). More trade in koi results in more funds that can be invested in biosecurity. Fish  or ponds that are ill or appear off are generally isolated, pulled from sale, or moved from the holding areas until resolved.
  • As we see in the US biosecurity requires constant diligence by everyone in each facility and throughout. Everyone must: Think Biosecurity, Plan Biosecurity and Act Biosecurely, 
  • I’ll post some photos of a selection of facilities and some more information/thoughts in the near future. This was just a few quick notes. All-in-all this has been a great learning opportunity for me and I really appreciate all the patience from the breeders with all of my questions. I have seen some beautiful fish!!!

4 responses so far