Date: 26 November 2013
Aspergillus terreus Thom. Conidial head of Aspergillus terreus. Conidial heads are compact, columnar and biseriate. Conidiophores are hyaline to slightly yellow and smooth walled.
Copyright:
With thanks to G Kaminski. D Ellis and R Hermanis Mycology Unit, Women’s & Children’s Hospital , Adelaide, South Australia 5006
Notes:
Colonies on CYA 40-50 mm diam, plane, low and velutinous, usually quite dense; mycelium white; conidial production heavy, brown (Dark Blonde to Camel, 5-6D4); reverse pale to dull brown or yellow brown. Colonies on MEA 40-60 mm diam, similar to those on CYA or less dense. Colonies on G25N 18-22 mm diam, plane or irregularly wrinkled, low and sparse; conidial production light, pale brown; brown soluble pigment sometimes produced; reverse brown. No growth at 5°C. Colonies at 37°C growing very rapidly, 50 mm or more diam, of similar appearance to those on CYA at 25°C.Conidiophores borne from surface hyphae, stipes 100-250 μm long, smooth walled; vesicles 15-20 μm diam, fertile over the upper hemisphere, with densely packed, short, narrow metulae and phialides, both 5-8 μm long; conidia spherical, very small, 1.8-2.5 μm diam, smooth walled, at maturity borne in long, well defined columns.Distinctive featuresVelutinous colonies formed at both 25°C and 37°C, uniformly brown, with no other colouration, and minute conidia borne in long columns make Aspergillus terreus a distinctive species.
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Images and abstract taken from Mert D et.al., Hematol Rep. 2017 Jun 1;9(2):6997. doi: 10.4081/hr.2017.6997. Invasive Aspergillosis with Disseminated Skin Involvement in a Patient with Acute Myeloid Leukemia: A Rare Case.
Invasive pulmonary aspergillosis is most commonly seen in immunocompromised patients. Besides, skin lesions may also develop due to invasive aspergillosis in those patients. A 49-year-old male patient was diagnosed with acute myeloid leukemia.
The patient developed bullous and zosteriform lesions on the skin after the 21st day of hospitalization. The skin biopsy showed hyphae. Disseminated skin aspergillosis was diagnosed to the patient.
Voricanazole treatment was initiated. The patient was discharged once the lesions started to disappear.
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A pile of woodchip stored for use in a garden usually as a weed suppressing mulch. The heat building up in the pile is illustrated by the plumes of steam eminating from the top of the pile.
Aspergillus fumigatus is particularly well adapted to grow in the heat (up to 60C) found in such piles of rotting organic material and this characteristic, an adaption for its life in its natural environment also enables it to survive and grow in warm mammalian bodies at 37C. Most fungi cannot grow or survive at those temperatures
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MK is 59 years old and presented with right sided pleuritic chest pain and coughing over 1 week. A chest Xray and then CT scan revealed complete collapse of her right lower lobe and middle lobes. Mucous retention is seen just proximal to the abrupt cutoff. There was mild bronchiectasis.
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