Date: 7 May 2013
![Asp[1]fumighead2copyr](https://www.aspergillus.org.uk/wp-content/uploads/2013/11/Asp1fumighead2copyr.jpg "Asp[1]fumighead2copyr")
Copyright: n/a
Notes:
Colonies on CYA 40-60 mm diam, plane or lightly wrinkled, low, dense and velutinous or with a sparse, floccose overgrowth; mycelium inconspicuous, white; conidial heads borne in a continuous, densely packed layer, Greyish Turquoise to Dark Turquoise (24-25E-F5); clear exudate sometimes produced in small amounts; reverse pale or greenish. Colonies on MEA 40-60 mm diam, similar to those on CYA but less dense and with conidia in duller colours (24-25E-F3); reverse uncoloured or greyish. Colonies on G25N less than 10 mm diam, sometimes only germination, of white mycelium. No growth at 5°C. At 37°C, colonies covering the available area, i.e. a whole Petri dish in 2 days from a single point inoculum, of similar appearance to those on CYA at 25°C, but with conidial columns longer and conidia darker, greenish grey to pure grey.
Conidiophores borne from surface hyphae, stipes 200-400 µm long, sometimes sinuous, with colourless, thin, smooth walls, enlarging gradually into pyriform vesicles; vesicles 20-30 µm diam, fertile over half or more of the enlarged area, bearing phialides only, the lateral ones characteristically bent so that the tips are approximately parallel to the stipe axis; phialides crowded, 6-8 µm long; conidia spherical to subspheroidal, 2.5-3.0 µm diam, with finely roughened or spinose walls, forming radiate heads at first, then well defined columns of conidia.
Distinctive features
This distinctive species can be recognised in the unopened Petri dish by its broad, velutinous, bluish colonies bearing characteristic, well defined columns of conidia. Growth at 37°C is exceptionally rapid. Conidial heads are also diagnostic: pyriform vesicles bear crowded phialides which bend to be roughly parallel to the stipe axis. Care should be exercised in handling cultures of this species.
Images library
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Title
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25/04/90 After itraconazole treatment. Major improvement, defined as a complete response, after 10 weeks therapy with itraconazole.
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Image A. Chest x-ray shows a single nodule in the left mid lung field.
Image B. This emphasises how chest x-rays in this context underestimate the extent of disease. The most anterior nodule has ground glass surrrounding the nodule, a halo sign. This diagnostic feature is missed on plain chest X-rays.
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Chest X ray after 4 days, prior to treatment, showing massive increase in volume of lesion (Fig 2)
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Image A. This patient, aged 25 years developed a non productive cough and dyspnoea in the context of late-stage AIDS, CMV disease with ganciclovir-induced neutropenia and receiving corticosteroids. His chest radiograph shows fine bilateral reticular lower-lobe shadowing. He then developed gastro-intestinal bleeding with a gastric ulcer which showed hyphae on biopsy. He then developed blindness of one eye and the globe of his eye perforated. Hyphae were seen and Aspergillus cultured from the vitreous aspirate.
Image B. This radiograph, taken 25 days after the first and 3 days before death, shows of fine bilateral lower-lobe reticular shadows progressing to nodules in all lung zones.
This patient was reported as patient 3 in Denning DW, Follansbee S, Scolaro M, Norris S, Edelstein D, Stevens DA. Pulmonary aspergillosis in the acquired immunodeficiency syndrome. N Engl J Med 1991; 324: 654-662.
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Further details
Image A. Bronchoscopy revealed Aspergillus on culture.
Image B. The ability of Aspergillus to cause pulmonary infarction, probably through direct angioinvasion in this case, is characteristic.
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(Fig 1) Chest radiograph with ‘classical’ appearance of a pulmonary infarction – a wedge-shaped lesion peripherally set against the pleura.
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Large soft left upper-lobe shadow of focal invasive pulmonary aspergillosis in leukaemia, that was missed on earlier radiographs but apparent retrospectively. Variable density of the lesion suggests cavitation, which would be clearly visible on a CT scan of the thorax.
