Strains of Beauveria bassiana isolated from locust or from the soil varied considerably in their virulence and their ability to produce in vitro toxic metabolites against Locusta migratoria. Among the pathogenic isolates, only culture filtrates of 90/2-Dm, 92/11-Dm and 0023-Su were toxic by injection, a result which demonstrates that isolates of B. bassiana can be pathogenic for L. migratoria w...

The antimicrobial effect of the broad-spectrum bacteriocin enterocin AS-48 against the toxicogenic psychrotrophic strain Bacillus cereus LWL1 has been investigated in a model food system consisting of boiled rice and in a commercial infant rice-based gruel dissolved in whole milk stored at temperatures of 37 degrees C, 15 degrees C and 6 degrees C. In food samples supplemented with enterocin AS...

Studies the effects of exposure to light of the laser diode Melles Griot (λ = 670nm), He-Ne laser (λ = 632.8nm) and argon laser (λ = 514nm) on selected soil micro-organisms, fungi that destroy old manuscripts, pictures, stone, etc. and on humification and mineralization of soil samples. Also studies exposure effects on seed growth and biomass production of a few species of cultivated plants and...

Mycotoxins are secondary metabolites produced by filamentous fungi that cause a toxic response when ingested by animals or man. Demand of natural fur, such as those from rabbit and chinchilla, produced under controlled conditions, has increased worldwide. The toxicogenic mycoflora contaminating feeds for these animals was enumerated and identified. Six of the major mycotoxins implicated in anim...

During the last decade, scientists have given increasingly frequent warnings about global warming, linking it to mycotoxin-producing moulds in various geographical regions across world. In future, more pronounced climate change could alter host resilience and host–pathogen interaction a significant impact on development of toxicogenic production their secondary metabolites, known as mycotoxins....

The estuarine genus Pfiesteria has received considerable attention since it was first identified and proposed to be the causative agent of fish kills along the mid-Atlantic coast in 1992. The presumption has been that the mechanism of fish death is by release of one or more toxins by the dinoflagellate. In this report, we challenge the notion that Pfiesteria species produce ichthyotoxins. Speci...

Despite controlled relative humidity in archives and private collections, fungi are a widespread cause of biodeterioration cinematographic films historic photographs, which represent significant cultural loss to society. Photographic emulsions coatings organic hygroscopic nature good easily accessible source nutrients. Because hold whole stacks these materials, they subsequently contain more co...

Bee pollen is the result of agglutination grains collected from flowers and mixed with nectar salivary secretions by honey bees. a natural product exposed to environmental conditions also provides unique microhabitat for yeasts bacterial communities. We analyzed 30 fresh bee samples obtained main producing areas Argentina identify aerobic-spore-forming bacteria. 73 isolates belonging 16 differe...