Home Aviguard


Lallemand Animal Nutrition UK Ltd
Spring Lane North
Malvern Link
WR14 1BU
United Kingdom

+44 (0) 1684 891055


+44 (0) 1684 891060


Registered in England and Wales
Company Registration No. 2886133
Registered Office:
Spring Lane North
Malvern Link
WR14 1BU




Aviguard® is a unique freeze-dried product derived from healthy, pathogen-free birds. It prevents colonisation of the gastro-intestinal tract of poultry and gamebirds by pathogenic (harmful) bacteria. The benign bacteria in Aviguard protect birds by occupying all of the ecological niches in the guts of the birds and so denying pathogenic bacteria space to establish themselves. This 'competitive exclusion' of the pathogenic bacteria by the Aviguard bacteria is what makes the product so effective.

Colonisation by harmful transient bacteria such as Salmonella, E. coli and Clostridia can occur in:

  • Day-old chicks because they have very little natural gut flora due to modern breeding conditions, clean hatchery environment, as well as separation of the chicks from their parents.
  • Poultry after treatment with antibiotics, creating an imbalance in the normal gut flora.
  • Birds that are stressed due to relocation, laying or moulting.

Aviguard® rapidly colonises/re-colonises the gut with the complete normal avian microflora and prevents colonisation by these pathogenic bacteria.


  • White free flowing powder that is easily dispersible in water.
  • Storage temperature 2°C to 8°C.
  • Contains over 200 normal avian gut flora micro-organisms.
  • Shelf life from manufacture is 18 months.
  • The product is packaged in foil laminate sachets sufficient for 2000, 5000 or 10,000 chicks.
  • Product can be applied by spray treatment.


  • Establishment of normal avian gut flora in day-old chicks, turkey poults and gamebirds.
  • Re-establishment of normal avian gut flora in poultry following antibiotic treatment or at time of stress (relocation, peak of lay or moulting).
  • Prevention of colonisation by Salmonella, Clostridia and E. coli.
  • Reduction of necrotic enteritis.

Aviguard Distributors Worldwide.

MDL also supply spray equipment for Aviguard Application.

Our UK brochure for Aviguard is available as a PDF file on the Downloads page.

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Safe-Poultry is the Merck Animal Health website, which gives useful information on salmonella control in poultry.

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