Ten isolates of Paracoccidioides brasiliensis were examined for differences in virulence in outbred mice intravenously inoculated with the fungus, associated with mycelial morphology, and genetic patterns measured by random amplified polymorphic DNA (RAPD). Virulence was evaluated by viable yeast cell recovery from lungs and demonstration of histopathologic lesions in different organs. The resu...

The dependence of filamentous fungal protease secretion on morphology was investigated by employing the recombinant Aspergillus niger strain AB4.1[pgpdAGLAGFP] which contains a gene for the glucoamylase-GFP (green fluorescence protein) fusion protein. Different inoculum levels were used to obtain different sizes of pellet or free mycelia. The extracellular protease activity of the cultures vari...

Aspergillus fumigatus is an important opportunistic fungal pathogen. This organism must be able to adapt to stress changes in the microenvironment during host invasion and systemic spread. The high-osmolarity-glycerol (HOG) mitogen-activated protein kinase (HOG-MAPK) signaling pathway plays an important role in regulating morphology, growth, and adaptation to stress and virulence in a number of...

today, rocky monuments are being exposed to different physical, chemical and biological factors and therefore going to be ruined. one of physical destructive factors is growing of fungus and lichens on the rocks. this research aims to make use of silver nano-particles produced through microbial method in order to prevent growth and progression of fungus detached from rocky surfaces in meymand h...

RNA viruses of filamentous fungi fall into two broad categories, those that contain double-stranded RNA (dsRNA) genomes in rigid particles and those that are more closely related to positive-sense, single-stranded RNA viruses with dsRNA replicative intermediates found within lipid vesicles. Effective infectivity systems have been described for the latter, using RNA transcripts, but not for the ...

The genus Ambrosiella accommodates species of Ceratocystidaceae (Microascales) that are obligate, mutualistic symbionts of ambrosia beetles, but the genus appears to be polyphyletic and more diverse than previously recognized. In addition to Ambrosiella xylebori, Ambrosiella hartigii, Ambrosiella beaveri, and Ambrosiella roeperi, three new species of Ambrosiella are described from the ambrosia ...

background and purpose: airborne fungi are one of the most important agents responsible for triggering allergic reactions such as rhinitis and severe asthma. this study was conducted to analyze and monitor the prevalence and distribution patterns of atmospheric fungal aerosols in the air of qazvin during winter of 2012. materials and methods: in the current descriptive study, the incidence and ...

the incidence of nosocomial fungal infections has increased dramatically during the past two decades as the consequence of continuous increase in the number of severely immunocompromised patients. this study was done to determine the presumptive sources of nosocomial fungal infections at the intensive care unit and transplant wards (in a university- based teaching hospital in tehran) during a 1...

introduction basidiobolomycosis is a rare disease that, unlike other fungal infections, affects immunocompetent individuals. it is caused by an environmental saprophyte named the fungus basidiobolus ranarum. basidiobolomycosis usually appears as a subcutaneous infection. gi basidiobolomycosis is an emerging disease, and the colon is the most frequent involved part of the gi tract. case presenta...

background and objectives: the genus malassezia contains an expanding list of lipophilic yeasts involve in the etiology of various superficial fungal infections. pityriasis versicolor (pv) is the most prevalent malassezia -related infection distributed worldwide. in the present study, clinical and epidemiological features of the genus malassezia are discussed with special focus on pv in iran. m...