An opportunistic infection caused by a heterogeneous group of mitosporic fungi with clear (hyalo-) hyphae in the host. Common causative agents include acremonium; aspergillus; chrysosporium; fusarium; paecilomyces; penicillium; pseudallescheria; scedosporium; and scopulariopsis. Normally a dermatomycoses, it can become invasive in the immunocompromised host.