Highlights
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Effect of fermentation time on OVMC was investigated during pla-som process.
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Complete and viable OVMC were found on days 1–4 of fermentation.
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Fermentation period affects the viability and infectivity of OVMC to the host.
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Effect of low temperature on OVMC was investigated during the pla-som process.
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Fish keeping in refrigerator before pla-som processing prevents OVMC infection.