Introduction to the ninth edition of the Manual of clinical microbiology -- Laboratory management -- Laboratory design -- Laboratory consultation, communication, and information systems -- General ...

Using genomics, evolutionary biologists test several hypotheses on the origin of viruses. New evidence suggests they may have emerged more times than previously thought. Corroborating the virus-first ...

Micro-organisms constitute a very antique group of living organisms which appeared on the Earth's surface almost 3000 million years ago.