Ascomycota, Pezizomycotina, Eurotiales, Aspergillaceae. Genus: PAECILOMYCES
Paecilomyces formosus (Sakaguchi et al.) Houbraken & Samson
Latest update: 18 April 2025
Colony characteristics
Colonies (MEA, 7 d, 30°C) reaching 8 cm diam.
Microscopy
Conidiophores irregularly branched; conidia olive-brown, ellipsoidal to cylindrical, with truncate ends. Chlamydospores sessile or on short stalks, smooth-walled, spherical subhyaline. Sexual state unknown.
Differential diagnosis
Differentiation from closely related species P. maximus and P. lecythidus still needs investigation (Samson et al., 2009).
Pathogenicity
RG-1, BSL-1. Batarseh et al. (2020) reported a pulmonary infection in an immunocompetent individual. An infection in a patient with a granulomatous disease was described by Heshmatnia et al. (2017) and a cutaneous infection in a preborn infant by Kuboi et al. (2016).
One Health
Rostami & Jamali (2023) reported the fungus as a cause of dieback in Christ’s thorn trees and Torabi et al. (2019) in pistachio. Alizadeh et al. (2024) showed a wider host range on woody plants with beetles as possible vectors of transmission. Bilal et al. (2018) regarded the fungus as an endophyte.
References
Nomenclature
Monilia formosa Sakaguchi, Inoue & Tada – Centbl. Bakt. ParasitKde, Abt. II 100: 302, 1939 ≡ Paecilomyces formosus (Sakaguchi, Inoue & Tada) Houbraken & Samson, in Samson, Houbraken, Varga & Frisvad – Persoonia 22: 21, 2009; type strain: CBS 990.73B = ATCC 10865 = IMI 058427 = NRRL 1282.
Growth characteristics
| Growth at 37°C | + | |
