IL4 and keratitis: Ocular lesions: Animal model:  • Neutrophil + eosinophil accumulation, responsibility of cell types not completely determined  • Eosinophil contribution: IL-4 KO mice + IL-12-treated mice: correlation with eosinophil number and inflammation  • Neutrophil contribution: IL-5 KO mice + Wolbachia-injected mice: keratitis and no eosinophil but neutrophil accumulation