Feline aspergillosis.

Feline aspergillosis includes sinonasal aspergillosis (SNA), sino-orbital aspergillosis (SOA), other focal invasive forms, and disseminated disease. SOA is an invasive mycosis that is being increasingly recognized, and is most commonly caused by a recently discovered pathogen Aspergillus felis. SNA can be invasive or noninvasive and is most commonly caused by Aspergillus fumigatus and Aspergillus niger. Molecular methods are required to correctly identify the fungi that cause SNA and SOA. SNA has a favorable prognosis with treatment, whereas the prognosis for SOA remains poor.