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Arctic char (Salvelinus alpinus) cultured in a recirculation system developed chronic diarrhea with no mortality. Histopathology revealed moderate to severe enteritis. Infectious agents were not detected. Fecal water content and f...
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Arctic char (Salvelinus alpinus) cultured in a recirculation system developed chronic diarrhea with no mortality. Histopathology revealed moderate to severe enteritis. Infectious agents were not detected. Fecal water content and fecal bacterial counts were elevated. Diarrhea was likely due to dietary imbalance that affected digestibility of feed components.
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During the workshop, the short lectures of several research groups were presented. The report covers both the presentations and subsequent discussion session.
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The presentations in this workshop comprised an overview of bacterial and viral disease of gadoids, an overview of gadoid parasites, a survey of the parasite fauna of wild gadoids in the Scottish coastal zone, an investigation of ...
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The presentations in this workshop comprised an overview of bacterial and viral disease of gadoids, an overview of gadoid parasites, a survey of the parasite fauna of wild gadoids in the Scottish coastal zone, an investigation of the imapct of Lernaeocera branchialis on juvenile cultured cod and a note on the occurrence of Clavella adunca in wild gadoids.
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This report describes the pathological effects Lamellodiscus spp. on the gills of the sharpsnout seabream, Diplodus puntazzo and the efficacy of formalin as a treatment. Two species of Lamellodiscus were identified: Lamellodiscus ...
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This report describes the pathological effects Lamellodiscus spp. on the gills of the sharpsnout seabream, Diplodus puntazzo and the efficacy of formalin as a treatment. Two species of Lamellodiscus were identified: Lamellodiscus ergensi and L. bidens. The attachment of parasites caused destruction, fusion and hyperplasia of the gill filaments. Formalin was effective in removing the worms when applied as a bath treatment at a concentration of 200mg/ml for one hour.
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The study involved 30-135 g carp more than one year old, that had been cultured since the stage of summer fry at the Fisheries Research Station operated by the Agricultural University's Department of Aquaculture, University of Szc...
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The study involved 30-135 g carp more than one year old, that had been cultured since the stage of summer fry at the Fisheries Research Station operated by the Agricultural University's Department of Aquaculture, University of Szczecin and located in a Dolna Odra power station cooling water canal. The fish selected for analyses showed the following clinical signs in summer: apathy; strong necrotic patches on gills; lustreless and rough skin with numerous deep necrotic spots extending down to the muscles; deposits of thick mucus under the gill covers. On the 4th of June 2004, three carp samples of 15 individuals each were delivered live to the German National Reference Laboratory Insel Riems for analyses. Koi herpesvirus was detected in two out of the three samples using different PCR assays. The PCR results were confirmed by nested PCR and in situ hybridization. Assays were performed on gills, brain, and kidney tissues. Samples were also taken from outbreak survivors showing no clinical signs of disease in autumn 2004 and tested by PCR and nested PCR. These results were also confirmed by in situ hybridization using different probes. This is the first detection, virus isolation and confirmation of KHV in Poland.
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The Juvenile Oyster Disease Workshop held in conjunction with the 26th Milford Aquaculture Seminar chronicled two decades of an industry's fight against juvenile oyster disease to save their businesses; their partnership with the ...
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The Juvenile Oyster Disease Workshop held in conjunction with the 26th Milford Aquaculture Seminar chronicled two decades of an industry's fight against juvenile oyster disease to save their businesses; their partnership with the research community to find the causative agent(s) for this devastating disease of cultured young oysters; and their experiences in learning how to manage this disease to keep an industry alive.
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The prevalence of gastrointestinal parasites in suckling piglets, weaners, fattening pigs and sows was studied from November 2001 to October 2002 on 16 free-range farms (FRF), 11 organic farms (OF) and 9 conventional farms (CF) by...
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The prevalence of gastrointestinal parasites in suckling piglets, weaners, fattening pigs and sows was studied from November 2001 to October 2002 on 16 free-range farms (FRF), 11 organic farms (OF) and 9 conventional farms (CF) by means of faecal examinations of composite samples. Each farm was visited four times with a 3-month interval. Infections with coccidia were found on 43.8% of the FRF, 90.9% of the OF and 66.7% of the CF. Sows had the highest prevalence, particularly on FRF (87.5%) and OF (80%). Ascaris suum was present on 50% of the FRF, 72.7% of the OF and 11.1% of the CF, whereas fattening pigs on FRF (42.9%) and OF (54.5%) had the highest prevalence. Oesophagostomum spp. were observed on 25% of the FRF, 27.2% of the OF and 22.2% of the CF. The infection was most prevalent in the sows on all farm types: 37.5% on FRF, 30% on OF and 22.2% on CF. Trichuris suis was found on 37.5% of the FRF, 36.4% of the OF and 11.1% of the CF. Again, this infection was most prevalent in the sows, particularly on the FRF (50%) and OF (30%). No other gastrointestinal parasite species were found and no clinical signs were observed. No seasonal trends could be distinguished. In many cases, when an age group on a farm was positive for a certain parasite, it remained so during the whole study. This indicates that this parasite was really 'endemic' on that farm. The results of this study demonstrate that the prevalence of helminth infections of pigs on farms with outdoor facilities is higher than in pigs on conventional farms..
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Background A survey was developed to characterize disease incidence, common pathology lesions, environmental characteristics, and nutrition programs within captive research marmoset colonies.
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Aquacultured corals are typically reared in dense in situ (mariculture) or ex situ (in aquaria) culture facilities. This high density rearing method makes these corals particularly vulnerable to specific diseases since virulence a...
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Aquacultured corals are typically reared in dense in situ (mariculture) or ex situ (in aquaria) culture facilities. This high density rearing method makes these corals particularly vulnerable to specific diseases since virulence and communicability of pathogens have been shown to increase with host density. As such, entire production lines may be threatened. Maricultured corals are particularly at risk as the diversity of both diseases and of affected coral species in the marine environment is on the rise. Coral diseases are now a major driver of coral mortality on all reef systems from the Indo-Pacific through to the Caribbean and not only affect species in situ, but can be inadvertently transported into the culture systems. The avoidance of disease outbreaks in culture systems is of upmost importance and the mitigation of diseases in these systems is vital in the maintenance of healthy cultures. Although the study of naturally occurring coral diseases has become a popular and relatively well-studied topic over the last few decades, the effects of these diseases on coral husbandry and aquaculture are still virtually unknown. Aquaculture of corals is a developing industry, both for stocking the ornamental industry and for restoration purposes. This overview outlines what is known about coral diseases in aquaculture; what implications these diseases have on this activity; what may be the causes of the disease outbreaks in these systems, as well as what methods are available for maintenance of healthy stocks and for mitigation once a disease has been observed.
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