A good start for broiler flocks begins with healthy chicks in a clean house. Pathogenic microorganisms are a continuous threat for broilers’ health as they can cause illness, immunosuppression, and poor performance. If the broiler house is not disinfected effectively, this means that viruses are already lying-in wait for the fresh batch of chicks to arrive. This is not the good start that every poultry farmer aims to achieve. Sjaak de Wit, at GD Animal Health, discusses a test which allows simple checking for the presence of viruses.