Global Foodborne Infections Network (GFN)

Antisera and reference testing services


Whenever budget permits, a set of Salmonella serotyping reagents is provided free of charge to Institutional Members at the Global Foodborne Infections Network Training Courses. The antisera are quality controlled by Pasteur Institute, Public Health Agency of Canada and the National Food Institute of Denmark. Although financial support to acquire laboratory reagents is not available after the course, the Global Foodborne Infections Network provides help to find a reasonably priced reliable source of good quality antisera.

Reference testing

The National Food Institute, Technical University of Denmark (DTU Food) is offering free of charge, as a service to the members of the Global Foodborne Infections Network (GFN), the following analyses of a limited number of Salmonella isolates per member:

  • Serotyping and phagetyping of Salmonella,
  • Antimicrobial susceptibility testing of Salmonella (and occasionally other foodborne bacteria e.g. Campylobacter jejuni/coli),
  • PFGE of Salmonella (and occasionally other foodborne pathogens),
  • Genetic characterization of antibiotic resistance genes in foodborne pathogens,
  • Other analyses according to a special agreement.

All analyses should be relevant to the scope of the Global Foodborne Infections Network, namely: "to facilitate data sharing and communication between individuals and laboratories involved in Salmonella serotyping and surveillance". Priority will be given to the Global Foodborne Infections Network members in developing countries.

The resources to provide this service free of charge has been granted by the Danish Ministry of Food, Agriculture and Fisheries. Food DTU jointly with the WHO reserves the right to decide which analysis will be carried out, and to reject all further analysis when the available resources have been depleted.

How to organize it?

  • You contact the Food DTU by mail, fax or e-mail (address below) and send a description of:
    • The purpose of the study
    • Which analyses you would like the Food DTU to perform
    • How many strains you would like to include in the study
    • When you are ready to ship the strains
  • The Food DTU will:
    • Evaluate your application and may suggest changes
    • Send you an agreement confirming which analyses will be carried out and a tentative time frame
  • You return to Food DTU the agreement duly signed by the responsible scientist.
  • You ship the strains agreed upon. The costs of shipment should be covered by yourself.


The service is offered free of charge, the study plans and the results will not be revealed to a third party by Food DTU. The laboratory/individual who orders the analyses has the full ownership of the results, unless anything else has been mutually agreed. Any such conditions will be specified in the mentioned agreement.

IMPORTANT: Preference is given to zoonotic types of Salmonella. Host specific types such as Salmonella typhi, Salmonella paratyphi, Salmonella gallinarum, Salmonella pullorum and Salmonella choleraesuis will only exceptionally be tested.

For requests, questions or comments contact:

Dr Frank Aarestrup
Antimicrobial Resistance Section
National Food Institute, Technical University of Denmark (Food DTU)
27 Bülowsvej
DK-1790 Copenhagen V
Tel: +45 72 34 62 81
E-mail: OR

Laboratory protocols

Key publications

Information brochure on Global Foodborne Infections Network