MUC5AC and infection: To test our hypothesis, human corneal-limbal epithelial (HCLE) and conjunctival epithelial (HCjE) cells, cultured for optimal mucin expression, were incubated with the EKC-causing HAdV-D37 and non-EKC-causing HAdV-D19p at a multiplicity of infection (MOI) of 3 for 2 h.