PubMed Health⌕ Search

Biomedical subjects

D G Ahearn

Publications and source records attributed to D G Ahearn.

101 records · Page 6Linked to original sources
PubMed1968

Extracellular proteinases of yeasts and yeastlike fungi.

Approximately 800 yeasts and other fungi, representing over 70 species, were tested for extracellular caseinolysis. Isolates of a variety of genera, including Aureobasidium, Cephalosporium, Endomycopsis, Kluyveromyces, and numerous sporobolomycetes, demonstrated significant proteolytic activity. Caseinolysis was not necessarily correlated with gelatin liquefaction or with albuminolysis. Numerous fungi showed significant proteolysis at 5 C. The most active organisms were isolates of Candida lipolytica, Aureobasidium pullulans, Candida punicea, and species of Cephalosporium. Taxonomic and ecological implications of proteolytic activity are discussed.

Acremonium↗
PubMedDate not supplied

Allergic fungal sinusitis in the southeastern USA: involvement of a new agent Epicoccum nigrum Ehrenb. ex Schlecht. 1824.

Alternaria alternata, Aspergillus spp., Bipolaris spicifera, Curvularia lunata, Epicoccum nigrum and Fusarium solani were isolated repeatedly from groups of patients among 96 diagnosed with allergic fungal sinusitis (AFS). Epicoccum nigrum was obtained consistently from four patients, one of whom yielded mycelial masses consistent in morphology with E. nigrum. Fifteen of the predominant fungi recovered from air samples from selected patients' residences included the same species isolated from the mucin of its inhabitants. Air samples from other buildings, whose occupants (non-AFS individuals) complained of poor indoor air quality or of symptoms of the sick building syndrome (SBS), yielded some of the same species involved in AFS. An association of SBS with AFS was not established. Eight of the species implicated in AFS were found to colonize the surfaces of indoor construction and finishing materials at sites other than the residence of the patient. To our knowledge, this is the first report that E. nigrum can colonize nasal sinuses and cause AFS.

Air Pollution, Indoor↗