Penzig(1882)
Macroscopic morphology
Macroscopic morphology may vary significantly on different media, and descriptions here are based upon growth on potato flakes agar at 25°C with on/off fluorescent light cycles of approximately 12 hours each. Colonies are salmon-colored, moist and yeast-like, producing very little aerial mycelium. This is the only slow-growing, clinically significant Fusarium species. [2202], [1630].
Microscopic morphology
Hyphae are septate and hyaline. Macroconidiophores are short, simple (unbranched) or branched monophialides measuring approximately 10-18 x 4-5 µm. Macroconidia are small in comparison to other species (5-25 x 1.5-4.2 µm) and have 0-3 septa. The apical cell is hooked and the basal cell blunt or slightly notched. Microconidia are absent. Chlamydoconidia may be present but are usually rare. [2202],[1630].
Special notes
Fusarium dimerum resembles an Acremonium species macroscopically. It is distinguished macroscopically from other fusaria by its slow growth, and microscopically by lacking microconidia and by the size and shape of the macroconidia. It has been reported as an agent of keratomycosis[2004],[2487], endocarditis occurring four years post-coronary artery bypass [367], and of an infection in a stem cell transplant recipient [244].
FTL* in vitro susceptibility data
None available