Why Vaccinate Your Koi & Goldfish?
by John Howell
The Aquaculture Industry has been successfully vaccinating for years at a lower expense & higher success than was possible under antibiotic & post disease treatment only. The deadly outbreak in Japan last year has finally brought the recognition of vaccines to the Koi & Goldfish Industry.
Ulcer disease or hole-in-the-side is caused by a bacteria known as Aeromonas salmonicida. A contagious and deadly disease, it can only be treated with the newest antibiotics. Aeromonas has long been a curse to the Koi & Goldfish hobby. An even more serious threat is a new strain of Aeromonas which came out of Japan last year. Often referred to as the “new disease”, it is actually an incredibly fast killing strain of Aeromonas identified as Aeromonas hydrophilia. To understand the seriousness of this strain, here is an excerpt from a “Disease Alert” sent to Aqua Health dealers this past February.
This disease may or may not manifest itself like true hole-in-the-side. In many situations it goes septicemic before any ulcers are displayed. The fish just quickly die before treatment may be initiated or if treatment is begun, the treatment may prove to be ineffective and the fish die in the same short order. We are not talking individuals here, rather we are talking entire populations or a high percentage (>65%) of a given population. … In addition, as the water temperature warms up, this bacteria manifests extreme virulence and rapidity of action. The Japanese have traditionally isolated symptomatic individuals, warmed the water to >74F, added salt and antibiotics and saw healing within a few days. When that method is now used, reports are that 100% of the treated fish are dead within 72 hours! …. very significant losses are occurring. … the Japanese are extremely concerned about losing their livelihood due to this problem…
When, What, How & Why of Vaccines: