The superficial cell number in organoids was calculated by dividing the superficial area (calculated using: 4πr2) by the mean cell area in the organoid surface (15 μm2). Brain organoids were infected using ZIKV MOI 0.5 (2–6.5 x 105 PFU per organoid)—for 2 h, then cultured in medium with (or without) STX 12 μg/L (NRC Halifax, CAN) for 13 days. Mock-exposed organoids (treated and non-treated with STX) were used as control. The assay was performed in triplicates in three independent experiments.
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