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Feline coronavirus (FCoV)-specific IgA is increased in cats shedding virus in feces. Total fecal IgA, shown as µg IgA per gram of feces (a) and FCoV-specific fecal IgA, shown as relative amount (b) were determined by an ELISA. Each symbol represents a single cat. Bars show the mean and 95% confidence interval. Linear models were used to compare group means, and p values are shown when ≤0.05.
