Winemakers routinely use a range of ingredients and processing aids during production that can be potentially allergenic including casein, milk, egg, fish, and shellfish.
These ingredients, where present in detectable amounts, must be declared on product labelling. In particular, wine that is exported to places such as the EU, must declare the presence of egg and milk if over the detectable level.
Allergen test kits, distributed in Australia by AMSL, are now available so you can perform your own testing onsite to test for the presence of allergens in finished product as well as on contact surfaces, that could result in cross contamination of your product.
Further information is available at www.amsl.com.au