1000 test bottle - Reactors show clearly. Salmonella Pullorum is a disease that can be transmitted through breeding stock. This antigen will also bring out reactors to fowl that are carriers of Fowl Typhoid. It is for this reason that some poultry shows in compliance with state requirements, insist that you show proof of blood testing. In some states, you can take an examination to qualify to test your own stock. Instructions come with each bottle.