Biohazard in microbiology, virology and in work with cell cultures.

Possible biohazards are referred to in this report resulting from person's manipulation with microbes, viruses and cell cultures as well as risky contamination of examined biological material with the worker's microflora. Eventual intercontaminations are described throughout the hypo- and cryothermic conservation including the freeze-drying of biological material. Working security regulations are listed to conclude the report.