What does Aspergillus flavus look like under the microscope?
The microscopic characteristics of Aspergillus flavus isolate 5 under the basic biological light microscope showing the biseriate with philiades radiating from all sides (a); the globose conidia with varying sizes that are slightly roughened (b); and unbranched conidiophore which is nonseptate, rough, and hyaline (c).
What is the morphology of Aspergillus flavus?
Morphology of Aspergillus flavus The Aspergillus flavus group of fungi has a complex morphology that is classified based on the formation of sclerotia. Group I has L-strains whose sclerotia are greater than 400 μm in diameter and Group II has S strains with sclerotia less than 400 μm in diameter.
How can you tell Aspergillus flavus?
Abstract. Aspergillus flavus is a mycotoxigenic fungus that possesses the ability to produce B aflatoxins. It can be readily distinguished morphologically by the production of a bright yellow-green conidial color, when cultured on malt extract agar or Czapek yeast extract agar.
What are the colony morphology of Aspergillus?
Culture and conidial heads of Aspergillus fumigatus. Morphological description: On Czapek Dox agar, colonies are typically blue-green with a suede-like surface consisting of a dense felt of conidiophores. Conidial heads are typically columnar (up to 400 x 50 µm but often much shorter and smaller) and uniseriate.
What is the appearance of Aspergillus?
Surface: Initially white and then any shade of yellow, green, brown, or black, depending on species. Texture is velvety or cottony.
What is the shape of Aspergillus?
The genus Aspergillus is characterized by the formation of flask-shaped or cylindrical phialides either in a single or double series on the surface of a vesicle at the apex of a conidiophore (Raper and Fennell 1965).
What are the microscopic characteristics of Aspergillus?
Microscopic characteristics for the identification were conidial heads, stipes, color and length vesicles shape and seriation, metula covering, conidia size, shape and roughness also colony features including diameter after 7 days, color of conidia, mycelia, exudates and reverse, colony texture and shape.
What is the texture of Aspergillus?
Is Aspergillus septate or Aseptate?
Solution : The mycelium of Aspergillus consist of branch septate hyphae.
Which is the resistant structure in Aspergillus flavus?
Abstract. Invasive and allergic infections by Aspergillus flavus are more common in tropical and subtropical countries. The emergence of voriconazole (VRC) resistance in A. flavus impacts the management of aspergillosis, as azoles are used as the first-line and empirical therapy.
What is the Colour of Aspergillus?
Aspergillus colonies are downy to powdery in texture. The surface color may vary depending on the species. The reverse is uncolored to pale yellow in most of the isolates. However, reverse color may be purple to olive in some strains of Aspergillus nidulans and orange to purple in Aspergillus versicolor (TABLE 1).
Does Aspergillus flavus have septate hyphae?
The fungus was identified as coinfection of Aspergillus flavus and Rhizopus arrhizus. The histopathological report endorsed our findings showing broad and aseptate hyphae suggestive of Zygomycetes sp. and thin, septate hyphae with dichotomous branching suggestive of Aspergillus sp. (Figure 5).
Does Aspergillus have branching hyphae?
Aspergillus can be identified quickly by its septated hyphae and the 45 degree angle branching of its hyphae.
Is Aspergillus flavus filamentous?
Aspergillus flavus is a fungus. It grows by producing thread like branching filaments known as hyphae. Filamentous fungi such as A. flavus are sometimes called molds.
Does Aspergillus have septate hyphae?
The typical hyphae of Aspergillus are septate, and they branch at acute angles.