Aspergillus niger and Aspergillus fumigatus

Aspergillus niger

Since I decided to write about Aspergillus fumigatus last week, I thought it’d be alright if I did a sort of “Aspergillus Series” and keep this ball rolling. So just a quick recap; Aspergillus species are the second most encountered fungi in the clinical laboratory. Aspergillus fumigatus is… Continue Reading
Aspergillus fumigatus.

Aspergillus fumigatus complex

Of all the fungus that passes through the lab, Aspergillus species are among the most common; second only to Candida species. Of all the Aspergillus species isolated, Aspergillus fumigatus (complex) is the one that is most frequently isolated. We call it a “complex” because there is actually a cluster of… Continue Reading


Alternaria is an interesting little critter. It is sometimes considered a contaminant, but can also cause infection in subcutaneous tissue. In some cases it may cause infection of the nails, eye or nasal sinuses. Additionally, it can create problems with asthma or respiratory allergies. I frequently isolate this organism from… Continue Reading