We are collecting data related to cases of rare filamentous fungi, especially zygomycosis, fusariosis and other less common infections caused by, e.g. Scedosporium, Penicillium, Acremonium, Paecilomyces, Trichoderma, and any other rare fungi, including dematiaceous fungi such as Alternaria, Aureobasidium, Bipolaris, Cladiophialophora, Cladosporium, Curvularia, Exophiala, and Phialophora, and rare yeasts, e.g. Trichosporon.

Inclusion criteria:
- Cultural, histopathological, antigen, or DNA evidence of invasive fungal infection

Exclusion criteria:
- Infection due to Aspergillus spp., Candida spp., Cryptococcus neoformans, Pneumocystis jiroveci
- Endemic fungal infection such as coccidioidomycosis or histoplasmosis
- Colonisation or other non-invasive infection

Budgetary information
For evaluable patient documentations filled in by the participating center a compensation of € 100 each will be paid. If the documentation workload is too high, centers are encouraged to ask the study office for personnel to be sent to the site. For isolates made available to the central laboratory an additional € 50 will be paid.