Scientific and technological solutions at your fingertips.


In 2016, Dr. Livio Janz, motivated by the limited access of the population in the interior of Paraguay to complex laboratory diagnoses, close to their homes; decides to found the company Valle Doncella S.R.L.

The company’s focus until 2020 was to support these laboratories by providing selective know-how, so that they can incorporate a greater range of excellent services, from reagents and equipment, to first-level instruments and supplies; in highly favorable economic conditions.

In 2021, due to the high demand for our services, we have taken a step towards growth, transforming ourselves into Janz & Janz S.A.

This led to an expansion of our territorial coverage to be closer to our clients, enabling business units in Ciudad del Este, Encarnación, Luque, and soon in Cnel Oviedo and Pedro Juan Caballero.

Our commitment to well-being expands, offering not only technological solutions in the fields of human health, but also incorporating animal health and nutrition into our portfolio, as well as; technological options for the agricultural sector.


Connect our clients to the best options in a globalized world of scientific and technological solutions.


Innovate the biotechnology sector with solutions that drive our clients to success.


Reflect Judeo-Christian values with a strong commitment to speed, knowledge, transparency and quality in order to contribute to the well-being of others.


  • Preventive maintenance, repair and training for commissioning of represented equipment.
  • We have a stock of spare parts and original parts.
  • To be always operational, we offer loaner equipment for the duration of the repair and / or restitution.
  • Get in touch with us, we will advise you on the analytical options that best suit your needs.
  • We can help you in the experimental design and the interpretation of the results, fine-tune the test in the laboratory or check that the measures are working correctly.