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Infectious bronchitis virus

Digitally-colorized transmission electron microscopy (TEM) image of a number of infectious bronchitis virus (IBV) virions. This enveloped pathogenic virus belongs to the Coronaviridae family and causes infectious bronchitis (IB) in poulty. This virus is very contagious through trasmission via air and contaminated material (food, water, supplies). It has a short incubation period. Entire flocks can be infected within days. The disease affects a number of organ systems including respiratory, gut, reproductive and urogenital organs. Image courtesy of the Centers for Disease Control and Prevention (CDC / Dr. Fred Murphy; Sylvia Whitfield).

Aspergillus flavus

Aspergillus flavus, green mold. Conidiophore (fruiting structure / sporangium) producing conidia (asexual conidia / spores). Magnification 220, scanning electron microscopy. Aspergillus flavus is a wide spread saprophyte found in soil, seeds, fruits and decaying vegetation. It is also found indoors on water damaged carpets and building materials. It is one of the Aspergillus species which causes aspergillosis, commonly in the tropics. Aspergillosis is a respiratory lung infection in people with weakened lungs or that are immune deficient (especially AIDS patients). This fungus produces aflatoxin, a group of virulent mycotoxins that are known animal carcinogens. These mycotoxins are can induce liver cancer in humans. The toxins may contaminate stored food (particularly carbohydrates). A. flavus has also been reported to be allergenic and its presence is associated with asthma. Courtesy of Dennis Kunkel.

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The aim of the PSM is to propagate to the public achievements in microbiology, especially those developed by the Society members.

Promoting the exchange of information and stimulate discussion and collaboration among scientists active in all aspects of virology.

This bacteria is a filamentous, Gram-positive soil-dwelling producer of beneficial compounds and other secondary metabolites. This organism produces a variety of anibiotics including perimycin, methylenomycin, actinorhodin and undecylprodigiosin. In soil Streptomyces break down much of the organic materials and is also partly responsible for the smell of soil. It also takes part in the nitrogen cycle. This organism does not cause any known disease in plants, animals or humans.

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