2017
DOI: 10.3354/dao03128
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Risk factors associated with white spot syndrome virus outbreaks in marine shrimp farms in Rayong Province, Thailand

Abstract: The purpose of this study was to determine risk factors for white spot disease (WSD) in Rayong, Thailand. A study was conducted from October 2014 to March 2015 to identify potential farm-level risk factors using a validated questionnaire. We completed 1 questionnaire for each farm; a total of 38 questionnaires from the case farms and 127 questionnaires from the control farms were collected. The results showed that the presence of WSD in previous crops and the use of seawater were risk factors (p < 0.01), indic… Show more

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Cited by 3 publications
(6 citation statements)
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“…Generally, farmers need to add water during cultivation; hence, they use water directly from natural reservoirs or reservoir ponds, increasing the risk of WSD occurrence through untreated water. This result is consistent with our previous study, indicating that water added without treatment during ponding is a major risk factor ( Yaemkasem et al, 2017 ). In contrast, a closed recirculation system can reduce the risk of WSD more than an ordinary closed system; however, the operation of this system is more expensive.…”
Section: Discussionsupporting
confidence: 94%
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“…Generally, farmers need to add water during cultivation; hence, they use water directly from natural reservoirs or reservoir ponds, increasing the risk of WSD occurrence through untreated water. This result is consistent with our previous study, indicating that water added without treatment during ponding is a major risk factor ( Yaemkasem et al, 2017 ). In contrast, a closed recirculation system can reduce the risk of WSD more than an ordinary closed system; however, the operation of this system is more expensive.…”
Section: Discussionsupporting
confidence: 94%
“…In the structured interview schedule, questions included those on farm information, farm practices, farm biosecurity, and possible risk factors associated with WSD ( Supplement 2 ). All questions were designed based on literature reviews ( Piamsomboon, Inchaisri & Wongtavatchai, 2015 ; Yaemkasem et al, 2017 ). In detail, the questions adopted from Piamsomboon, Inchaisri & Wongtavatchai (2015) were those related to farm area, culture area, number of pondings, water reserve area, source of farming water, owner of multiple farms, adjacent farms, water management, and application of fertilizer.…”
Section: Methodsmentioning
confidence: 99%
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“…However, filtering the water before filling up culture ponds will prevent the entry of species that could be disease carriers [ 10 ]. Researchers have reported that in Thailand, sourcing water from communal canals, culturing shrimp year-round, a single owner operating more than one farm, the presence of WSD in previous crops, and the use of seawater were associated with WSD [ 11 , 12 ]. Studies in Rayong Province, Thailand, between October 2015 and September 2018 reported significant disease clustering in ponds near the sea [ 13 ].…”
Section: Introductionmentioning
confidence: 99%