![]() White Spot Disease Is Under Control at Long Last It is no longer necessary to keep virus-infested shrimp farms closed for good! March, 1999 Takemi Ichimura ![]()
Chapter One -- The Experiment Relative to the Countermeasures against the Baculo Virus (Pnaeid rod-shaped DNA Virus, or PRDV) Endangering the Pacific Shrimp Farms 1 - 1 The Past Research on the Means of Enhancing the Self-Defense Function of Living Organisms: The past research and development effort and technological advances have failed to contain the worldwide spread of the deadly PRDV infection The so-called "PRDV shock" has become the center-stage issue in the international ichthyo-pathological community giving rise to fervent research activities ranging from actual disease conditions, operational losses, preventative measures, all the way to the possibility of spread to other species. The Department of Applied Aquabiology of the National Fisheries University has played a leading role in developing effective PRDV countermeasures under the leadership of Dr. Yukinori Takahashi. Obviously the most advanced function of homeostasis of living organisms is their immune mechanism. Though this function is peculiar to the more highly developed forms of life grouped as "Vertebrata," and absent in all forms of Invertebrata including shrimps and crabs, we nevertheless find these crustaceans are equipped with their own unique immune mechanism. Professor Takahashi has been known as one of the foremost researchers of identifying chemicals extracted from natural substances with remarkable effect in enhancing PRDV-stricken shrimps' built-in self-defense function. The critical problem in this case, however, lies in the fact that a rigorous feeding schedule must be maintained with pellets treated with such chemicals, and then measures are yet to be found to the problem of decline in effectiveness after a period of repetitive use. 1 - 2 The Present Status of the Research & Development by the Tokyo Life Science Laboratory (TLSL) of a Unique Countermeasure Based on an Information Extraction/Transfer Technology The TLSL's research and development activities date back to the early 1993 when the problem of PRDV control was first taken up by its laboratory located in Noto Peninsula, where a series of basic tests were conducted until a definitive conclusion was reached that there was enough scientific validity to continue with the effort. From 1996 on, therefore, TLSL has continued with its effort to develop and perfect the system of countermeasures consisting of a specially designed powerful magnetic device, a special memory plate and a memory water containing fine metallic memory agent along with the necessary software for extracting from live organisms, and processing and transferring them for specific purposes. Actual aquaculture experiments have been conducted using laboratory ponds equipped with these devices to measure the effectiveness of this PRDV countermeasure. While the conventional academic community as well as the leading shrimp farm operators remained indifferent at best, Professor Takahashi of the National Fisheries University has extended his full support to the TLSL research effort by providing both his own time and his university laboratory facilities for conducting the needed tests and experiments to them his own scientific and technical knowhows on such areas as determining the optimum strength of PRDV to be used for the survival ratio testing and the scientific control of the preparation of the test shrimps including their health conditions. [1] The first group of experiments on the extraction of life information; recording them in memory plates and transferring them to other media (1) Reversing the positive PRDV information 1) Recording the
positive PRDV information and transferring
the reversed (negative) information to memory water And then, as a medium to transfer the information finally to shrimps, we treated the feed pellets with this (negative) information-laden memory water for feeding the shrimps. We also used ceramic balls which were baked by mixing clay with the same information-laden memory water, which were used for transmitting the information to the shrimp pond using a specially designed water circulation mechanism. A series of tests using these two transmission media, pellets by way of the mouths of the shrimps and pond water environment itself transferring information through the skin of the shrimps, produced the average survival ratio of 20% to 40% for the tests in treated water and 5% to 10% for the tests in untreated water. Modest as they were, the tests nevertheless yielded a scientifically significant difference.
1) Positive transfer of for enhancing self-defense function The past texts are known to have yielded the result that the chemicals used for this purpose produce the highest level of self-defense capability at the 10th day of feeding the shrimps with treated pellets. Thus, we ran a special 10-day test feeding and extracted information from the blood corpuscles from the treated shrimps, following up with the same procedure of transferring the recorded information from the magnetic memory device to memory water and then to pellets. 2) The results of the tests
The survival ratio tests conducted with the combined method did produce a still more remarkable results, at the end of a 10-day test under attack by PRDV, of the shrimps fed with treated pellets yielding a ratio of 40% to 80% while only 0% to 10% of those fed with untreated pellets managed to survive, marking a convincingly significant difference.
As a result of the
tests using the combined method above, it
became evident that both the "reversed" PRDV information transfered
through pond water and the positive information of enhanced
self-defense capability transfered through feed pellets did
successfully entered the shrimp bodies yielding even higher survival
ratios than the sum of the two respective ratios derived from earlier
separate tests.
As a result of the
first group of tests, it has been
confirmed that PRDV can indeed by brought under control by feeding the
virus-stricken shrimp with life information. Thus, during this period,
our research effort focused on how the PRDV-related damages can best be
contained and/or prevented using only the method of transferring
information to pond water and cope with PRDV through the shrimps'
living environment without using pellets as a medium. (1) Direct transfer of information to shrimps by way of pond water Admittedly, the sea
water contains a variety of minerals and
is considered capable of storing memories, though its level of memory
capacity is considerably less than that of the memory water developed
by the TLSL. Also, the sea water's effective length of memory retention
is though to be much less than that of our memory water which is known
by our tests to be at least 2 to 3 years. For this reason, therefore,
we have developed the following device which enables us to pump
information into the shrimp ponds on continuous basis.
Of the three test
ponds, the fist one was being fed with the
"reversed" information while under PRDV attack. The second one was
being fed with no information while also under PRDV attack, and the
third one contained healthy shrimps without inflow of information. The
test results were that the survival ratio at the end of a 10-day period
for the first was 60% to 75%, that of the second 5% to 10%, and that of
the third 75% to 90%.
The above-described
series of tests provided a confirmation
of the fact that the sea water does memorize the information
magnetically, there remained a practical problem of the sea water
pumping system being operationally to costly.
The experiments consist of test ponds, all under PRDV attack, fed with the two types of information discussed above carried by wet air into them. The "control (CONT)" pond is infected without feeding information while others are treated. 1) The 9th Attack Test At the end of the first 10 days, the survival ratios were from 66% to 80% for ponds A and B, while it was a disastrous 0% for the pond (CONT) left without feeding information, showing a rapid decline from 77% after the first day, 37% after two days, 5% after three days, and finally reaching 0% in five days. 2) Survival test under relatively weaker, but still powerful PRDV attack The results at the end of the 10-day period were that the survival ratios for the treated ponds were 70% and 74% for A and B respectively while the ratio was 12% for the untreated pond (CONT). 3) Survival test with still weaker PRDV infection
As a result of these tests, a scientifically significant difference in survival ratio has always been observed between the treated ponds and the untreated ponds (CONT). All these are specially designed rigorous tests to produce the expected results at the end of a 10-day period so that we can determine if there are significant differences between the treated and untreated ponds. Thus, the survival ratios rendered do not necessarily indicate their applicability to the operational realities of commercial shrimp farms. There exist a complexity of causes for PRDV infection such as skin penetration, feeding on dead PRDV-stricken shrimps and other crustaceans living in the same environment like young crabs and their live fry, each shrimp pond having its own peculiar combinations of causes. One thing is for certain, however. Once infected, PRDV is bound to spread and destroy all shrimps in all stages of life within a time span of about two weeks. 1 - 3 Biological examination of the Process of Improving the Survival Ratio It has become known, as a result of the tests conducted in the past, that fatal PRDV infection can occur without doubt through direct skin contact. Also, it has been observed that PRDV does penetrate into DNA and begins rapidly multiplying within several yours after initial infection. The results of these tests indicate, however, that the combination of the "reversed" PRDV information and the enhanced self-defense information were in fact transferred from the magnetic device into pond water, and then allowed to affect PRDV by penetrating into the shrimp bodies through skin contact. Upon administering PCR test on the shrimps still surviving after the 10-day tests, we found most of them carriers of PRDV. But, most interestingly, a small number of them were found negative non-carriers. It goes without saying that much more research as well as field tests are needed for scientifically explaining the mechanism, role and function of life information as used in this fashion. But, in the interim, the following efforts are currently under way from the biological as well as immunological and microbiological standpoints. (1) Immunological examinations Along with the second series of tests discussed in the foregoing pages, we have taken samples during the same test periods for conducting voracity tests and PO activities level tests. 1) Voracity ratios
and indices
2) PO activities level The polyphenol oxidase (PO) activities are usable as the indices of the production capability of these pigments. We have conducted our own examinations, along with the tests under 1), using time series for each of the test ponds using the light-absorption rate method. In the case of the untreated ponds, it continued to drop from 0.2 at (T0) to (T3), and further down to 0.16 at (T10) showing no sign of increase. In the case of wet air method, after dropping from (T0) to (T3), it suddenly began rising from after (T6) reaching 3.5, a value 200% greater than that of the untreated ponds. In the case of sea water direct transfer method, no change was observed up to (T3), but then, suddenly jumped from after (T6) to 4.5 and 5.5, amounting to 270% better performance than the untreated ponds. (2) Microbiological tests While PRDV can be
kept in storage alive, it has not so far
been possible to store and reproduce it in nutritive culture medium. This test called the
9th experiment was repeated more than
dozen times, producing nearly identical result at all times. One of the
remaining problems to be examined is the irregularity of the shape and
size of the "no- and little-growth" areas. (3) Remaining tasks and challenges To repeat what has
already been said, we now consider that
the validity of the life information extraction and transfer technology
has been largely proven at least in its initial stage of research based
on the results of the immunological and microbiological tests and
experiments of the PRDV-stricken shrimps introduced in this paper. 1 - 4 Using Test Tanks for developing practical technologies applicable to shrimp farms The causes for PRDV infection are various, i.e., from parents to offsprings, from living environment through skin and/or feeding on the sick. We are yet to gain a definitive knowledge as to which are more dominant causes than others. In the case of infection through feeding, one dead sick shrimp is eaten up by several live shrimps, which in turn will die in several to ten days. Thus, as this process spreads the disease in geometric progression. Also, infection through feeding results in a large amount of PRDV intake, which in turn makes the cycle so much shorter due to quicker death. Among the aforecited attack tests, the heaviest infection resulted in the near total decimation of the 95% of shrimps in just three days. We decided to recreate the same conditions in the laboratory test tanks in order to determine the effectiveness of our information technology as a PRDV countermeasure. Also, in the case of infection through the living environment, the dead bodies of sick shrimps and crabs are spread across the bottom, making it unavoidable for PRDV to reach all corners during the 1-week period in which it remains actively infectious. Prior to the release of shrimp fry, the pond is thoroughly disinfected by chlorination, but after release, strong disinfectant can no longer be used. Shrimp fry are being mass-produced to meet the needs of both shrimp farms and open sea release programs, but there are increasing suspicions being raised of vertical infection as well as horizontal disease transmission via the living environment. Therefore, our laboratory tank tests were also aimed at identifying effective methods of controlling PRDV infection during the process of mass-production of fry by means of "reversed" PRDV information transfer. At present, various preventive measures are being tried by the shrimp farms including such chemicals as PG and fucoidan developed at the National Fisheries University, and it is our plan to seek out through these lab tank tests the best possible combination of the best of the traditional knowhows with our information transfer technology. Here are the summation of these lab tank tests conducted so far.
At
commercial shrimp farms, it is no at all so
easy to routinely collect dead shrimps day after day. Shrimps become
active during the evening hours, and it is almost impossible to keep
them away from feeding on dead and dying shrimp. (2) Controlling PRDV infection by means of treating the shrimps with "reverse" PRDV information just prior to the virus attack The
transfer of the "reversed" PRDV
information was allowed for one minute, and right after that, the
shrimps were infected by PRDV through skin contact. One untreated tank
was kept free from PRDV infection (CONT) while another tank was also
kept PRDV-free but treated by wet air information transfer, the third
tank was treated with "reversed" PRDV information without any treatment
of the living environment, and the fourth tank the combination of the
second and the third. (3) Controlling PRDV infection by combining PG and fucoidan with our information technology for greater effectiveness The
first tank was left alone with no
treatment, and the second tanks was treated only with wet air
information transfer, wile the third was the combination of wet air and
PG treatment, the fourth tank the combination of wet air and fucoidan,
and the fifth tank the combination of the third and the fourth. Judging from these test results above, we feel confident that we are nearer than ever to perfecting a truly operational technology which can be used commercially by shrimp farms. With this goal in mind, we are determined to delve into the more fundamental technological problems (to be discussed in Chapter Two) that must be solved for perfecting our information technology, while also aiming at integrating it with other cutting-edge scientific technologies.
2 - 1 Collaborating Shrimp Farms During 1996, one overseas and one domestic shrimp farms collaborated with the TLSL test projects, one domestic farm during 1997, and from 1998 through 1999, four domestic shrimp farms have been working with the TLSL in the execution of the various tests and experiments discussed in this paper. 2 - 2 Test Methods The wet air method was started in 1998, following the tests on pellet (sprayed with information-loaded memory water) and ceramic (to be spread on the pond floor with ceramic balls made of clay kneaded with information-carrying memory water) methods. During 1996, we experimented only with the "reversed" PRDV life information whereas in 1997, we began combining this with the enhanced self-defense information. 2 - 3 Summary of the Test Results [1] Results of the overseas tests The tests and experiments
carried out in Malaysia during 1996 consisted only of feed pellets and
ceramic balls methods containing the "reversed" PRDV life information.
Working with a large-scale shrimp farm with ponds numbering in hundred
and several tens raising black tiger shrimps. For a period of several
years, however, this farm had produced only disappointingly small
quantities of marketable shrimps under a severe attack in the early
years of vibrio infection and later the onslaught of PRDV. As the
latter continued to devastate the shrimp farms across the world, vibrio
disease seems to have subsided. It remains true, however, these two are
tending to combine to cause havoc in many cases. [2] Results of the domestic tests (1) The 1996 tests Pellet and ceramic ball methods were tested in combination using only the "reversed" PRDV information at one of the shrimp farms on Shikoku Island (shrimp farm "A"). This farm continued to suffer serious damages, but, thanks to the TLSL technical cooperation, the farm succeeded to restore its production almost approaching the level of the planned target. (2) The 1997 tests Same type of tests continued at Shikoku Island's shrimp farm "A" again succeeding to approach the planned production target. (3) The 1998 tests 1) Shikoku Island shrimp farm
"A" In the interim, there was an outbreak of vibrio disease rendering it somewhat difficult to distinguish its impact from that of PRDV. The shrimps produced and marketed by this farm continued to enjoy a success similar to the previous year's, but their excellent size and quality enabled the farm to more than achieve the season's sales target. Generally speaking, this farm releases shrimp fry in the spring and harvest marketable-size shrimps in the fall and winter months. This farm began implementing a fall fry release program aimed at hitting the market in the festive summer season. Since the summer temperature is the best guard against PRDV attack, this new production plan met with a resounding success. 2) Shikoku Island shrimp farm
"B" 3) Shikoku Island shrimp farm
"C" From the time fry are released in the spring until September, most shrimps and crabs were found to be carriers of PRDV. In October, however, all shrimps which would dug into the bottom sand during the day were found to be non-carriers while nearly 40% of those which remained above the sand bottom were also non-carriers. Further, during December, almost all of the floating shrimps were found to be non-carriers. In this case, despite a considerable damage caused by the influx of large number of snapper fingerings which fed on young shrimps, the end-of-the season production nevertheless closely approached the originally planned target of 300 grams per one square meter of water surface. 4) Shikoku Island shrimp farm
"D" 5) PRDV-infected shrimps making
full recovery carrying no virus at all But, the more massive evidence collected from large commercial-sized ponds seems to shed an important new light on the future possibility of our information technology. For, if we continue to produce the same result in the future series of tests, and as the mechanism is brought under more scientific scrutiny, our technology is likely to become applicable to other forms of life in addition to other types of viruses with only the sky seemingly the limit. (4) The 1999 plans and what have taken place We are conducting pilot tests and experiments at four different locations on the northern shores of Shikoku Island facing Seto Inland Sea. In addition to continuing with the shrimp farms "A" and "D" from the previous years, we have added farms "E" and "F." At "A" and "D," the season is in progress without a hitch, i.e., no major accidents, errors or disease outbreaks. At farms "E" and "F," which had been actually kept in fallow due to the violent past PRDV attacks, are now, as of August 31, production outlook is well over earlier expectations, and in-season shrimp shipments are already under way in order to provide more breathing room for the growing healthy shrimps. Copyright 1997 and
technology patent held by the Tokyo Life Science Laboratory, Tokyo
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