Although IL-8 production from primary keratinocytes infected with T. mentagrophytes, T. tonsurans, and T. rubrum (12) and IL-1β production from carcinoma keratinocytes infected with A. benhamiae (11) have previously been reported, our study is the first to demonstrate IL-1β production from primary human keratinocytes by T. equinum. This evidence concerns the gene IL1B and carcinoma.