Wappen Andreas R. Hassl
ex register
official reports




Although I ended my work as a sworn and court-​certified expert at the turn of the year 2018/19, I am still available as a private expert for clients. This compilation is intended to describe and delineate the fields of my profes­sional competence, in particular to support the clients for expert reports in the run-up to the selection of experts.

My area of expertise covers the field of hygienic microbiology. Microbiology is the study of all living things and viruses, these are no living things, that are not visible to the naked eye, so it is a branch of biology. However, this extremely imprecise and unsatisfactory definition becomes even more blurred if one takes into account the definition of medical micro­biology - the science for which I have a generalized license to teach at the Medical University of Vienna: Medical micro­biology deals with all living things, viruses and prions which

  • have some meaning for the health of humans and animals, but not for the one of plants and fungi, no matter how big they are (tapeworms: > 12 m), and which,
  • on the other hand, live parasitically (= existence at the expense of another living being, the host).

The field therefore not only includes known pathogens, but all the countless other germs that live in, on and with humans and animals. Specialization in the following areas was indispensable:

  • hygiene and feed suitability in pet and domestic animal husbandry,
  • appropriate, hygienically acceptable pet and domestic animal husbandry,
  • parasitology of man and animal,
  • consultant pest control,
  • Insects and arachnids: identification, control, and prevention of infestation,
  • opportunistic microbs, interdisciplinary processing of all questions,
  • medical and veterinary microbiology, unless medical concerns are concerned,
  • house vermin and fungi, without constructional concerns,
  • water hygiene, especially parasites in drinking and bathing water,
  • Travel and tropical medicine issues, unless clinical or therapeutic issues are affected.