It is caused by the Emergomyces species, a novel dimorphic fungus, previously classified under the genus Emmonsia. Following a revised taxonomy in 2017 based on DNA sequence analyses, five of these Emmonsia-like fungi have been placed under the separate genus Emergomyces. These include Emergomyces pasteurianus, Emergomyces africanus, Emergomyces canadensis, Emergomyces orientalis and Emergomyces europaeus. Emergomyces africanus was previously known as Emmonsia africanus, which has similar features to Histoplasma spp. and the family of Ajellomycetaceae. The disease has been observed among people who have a weakened immune system and risk factors include HIV, organ transplant and steroid use.
Emmonsiosis
Q fever
Nutcracker syndrome
Gastroenteritis
Esophagitis
Croup
Pneumocystosis
Pneumoparotitis