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- W2122126894 abstract "An optimized culture method for detection of infection of fish with the Red spotted grouper nervous necrosis virus (RGNNV) genotype of betanodavirus in striped snakehead (SSN-1, Channa striatus) cells is described. Inoculation of fish tissue homogenates at the same time or within 4 hr of seeding the SSN-1 cells was as sensitive as the method recommended by the World Organization for Animal Health, where homogenates were adsorbed onto an established cell monolayer. Such modification halved the time required and the costs of consumables, and reduced the potential for error when processing large numbers of samples. Positive culture results were obtained from 88.3% of 392 fish tissue homogenates in which RGNNV was detected using a quantitative reverse transcription polymerase chain reaction (qRT-PCR) assay; 99.7% of 943 tissue homogenates, which were qRT-PCR negative, were cell culture negative. Cytopathic effect (CPE) was characterized by large intracytoplasmic vacuoles in 0.1–60% of cells. Detachment of affected cells from the culture surface resulting in progressive disruption of the monolayer occurred in 46.4% of primary cultures and 96.0% of subcultures of positive samples. Identification of CPE that did not disrupt the cell monolayer increased estimates of the 50% tissue culture infective dose (TCID 50 ) by 1.07–2.79 logs (95% confidence interval). The predicted mean TCID 50 /ml was 3.3 logs higher when cells were inoculated less than 36 hr after subculture at less than 80% confluence compared to cells inoculated at greater than 80% confluence and more than 36 hr after subculture ( P < 0.05)." @default.
- W2122126894 created "2016-06-24" @default.
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- W2122126894 date "2011-05-01" @default.
- W2122126894 modified "2023-09-25" @default.
- W2122126894 title "Optimization of Betanodavirus culture and enumeration in striped snakehead fish cells" @default.
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- W2122126894 doi "https://doi.org/10.1177/1040638711404147" @default.
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