Tag - AHPND

Probiotics in Shrimp Aquaculture

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Shrimp ranks as the most favorite seafood among US consumers, and more than half of the shrimp in the market are coming from aquaculture. After decades of impressive growth, global shrimp aquaculture production in 2012 reached 3.78 million tons. However, catastrophic disease outbreaks have hindered the growing pace of the shrimp industry from time to time and caused tremendous economic loss, in billions of USD$ collectively. The most recent disease problem was the outbreak of the Early Mortality Syndrome (EMS) [...]

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Potential applications of bacteriophages for AHPND control

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Isolated phages evaluated effective in controlling major farmed shrimp disease, inhibiting bacterial growth Isolated phages tested are effective in controlling AHPND infection in farmed penaeid shrimp and inhibit bacterial growth. and inhibit bacterial growth. Photo by Darryl Jory. Acute hepatopancreatic necrosis disease (AHPND) is caused by a Vibrio bacterium (V. parahaemolyticus) that has caused substantial mortalities –… Potential applications of bacteriophages for AHPND control

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pirABvp-Bearing Vibrio parahaemolyticus and Vibrio campbellii Pathogens Isolated from the Same AHPND-Affected Pond Possess Highly Similar Pathogenic Plasmids

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Abstract: Acute hepatopancreatic necrosis disease (AHPND) is a severe shrimp disease originally shown to be caused by virulent strains of Vibrio parahaemolyticus (VPAHPND).  Rare cases of AHPND caused by Vibrio species other than V. parahaemolyticus have been reported.  Here we compare an AHPND-causing V. campbellii (VCAHPND) and a VPAHPND isolate from the same AHPND-affected pond.  Both strains are positive for the virulence gene pirABvp.  Immersion challenge test with Litopenaeus vannamei indicated the two strains possessed similar pathogenicity.  Complete genome comparison showed that the pirABvp-bearing plasmids in the [...]

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Four AHPND strains identified on Latin American shrimp farms

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AHPND is a major global disease of farmed shrimp that seriously affects the industry in many countries in Asia and Latin America. Photo by Darryl Jory. Acute hepatopancreatic necrosis disease (AHPND), also commonly known as Early Mortality Syndrome (EMS), is a serious, major global disease of farmed shrimp that causes hepatopancreas dysfunction and secondary Vibrio infections and can result in 100 percent mortality in the animals’ juvenile stages. The disease started in China in 2010 and has currently spread to aquaculture facilities in [...]

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We can grow better shrimp and in better ways

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China is obviously the major world player, both pushing and pulling the market as a producer and importer, and the country needs massive imports from Ecuador and other suppliers to satisfy its huge internal demand. Thailand continues its strong recovery from EMS/AHPND, through the increased use of improved genetic lines, enhanced production techniques and to some extent the expansion of its domestic market. Ecuador appears on track to meet or exceed its impressive 2015 production. Aquaculture in general – and [...]

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Aquaculture Europe 2016: Shrimp Disease Causes Millions in Losses Across Asia

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ASIA – Shrimp diseases such as white spot and AHPND have caused devastating losses for farmers across Asia in the last few years. Speaking at Aquaculture Europe 2016, 20-23 September, in Edinburgh Scotland, Dr Andy Shinn, Fish Vet Group, attempts to work out the true economic losses to farmers. Asia’s crustacean aquaculture is expected to exceed 5.08 million tons in 2016, an increase of 5.46 per cent. However, although there has been an increase in production, the level of growth [...]

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Shrimp farming sector looks for consensus on ways to battle trans-continental disease

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Governments, scientists and producers have expressed the need for a consensus on ways to fight a deadly disease that continues to seriously threaten the world’s shrimp farming sector. Outbreaks of acute hepatopancreatic necrosis disease (AHPND), commonly known as “early mortality syndrome” (EMS), caught the entire shrimp industry, scientists and governments by surprise as early as 2009 and continues to plague the sector. It is considered to be the most serious non-viral disease of cultured shrimp. A number of Asian and Latin [...]

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Nursery phase in shrimp farming: Benefits beyond EMS

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Beyond EMS and nursery systems The impact of the EMS/AHPND in Mexico has been severe. Production dropped 60% in 2013 which was very similar to that in Thailand. More problems than normal were attributed to post larvae sources. Some large groups took advantage of their large raceways infrastructure, and changed the production strategy by lowering stocking densities and prolonging the days of culture in the raceways for larger post larvae for stocking. The grow-out cycle in the ponds was further [...]

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Thailand: The History of Shrimp Farming and the Factors That Led to Its Growth

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Using traditional extensive techniques in large (30 hectares or more), low-lying coastal paddy fields, the first shrimp farms in Thailand were probably started during the 1930s.  Because of the dependence on natural tidal flow for wild seed and naturally occurring food organisms, yields were usually low (approximately 200 kilograms per hectare per year–kg/ha/yr). Semi-intensive shrimp farming in Thailand started during the early 1970s and was replaced by intensive shrimp farming beginning in 1987.  Penaeus monodon was the favored species because [...]

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China Research – Disease Control in Shrimp Farming

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Abstract: This study investigated the knowledge, practices and challenges of tilapia and shrimp farmers (Penaeus vannamei) when preventing and controlling diseases through the use of antimicrobials and other compounds in Guangdong Province, China, which is the most important shrimp and tilapia production area in China.  Of the 30 shrimp farms surveyed, 19 experienced outbreaks of red body disease and five experienced whitespot syndrome, both viral diseases, and five experienced “secret death disease” [AHPND/EMS], which farmers controlled by application a [...]

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