The analysis of a termite entombed for 100 million years in an ancient piece of amber has revealed the oldest example of "mutualism" ever discovered between an animal and microorganism, and also shows ...

Parasitic protozoa are unicellular eukaryotic pathogens that dwell inside host cells and/or in extracellular fluids. These organisms typically produce long-lasting chronic infections in order to ...

DURING recent years, there has been increasing amount of evidence regarding the importance of protozoa in the aerobic purification of sewage 1–4 and, more recently, some quantitative observations on ...