Infection with FCoV (median age in FCoV-infected cats 22 months vs. 23 months in non-infected cats, p = 0.60) or cpa (median age in cpa-infected cats 22 months vs. 27 months in non-infected cats, p = 0.16) was not significantly more common in young cats compared to older cats. This evidence concerns the gene CPA1 and infection.