France (1) Vocation (1) Serum (1) Immunoglobulins (1) Enzyme-linked immunosorbent assay (1) Discussion (1) Chickens (1) Bronchitis (1) Alkaline phosphatase (1) Use studies (1) Use studies (1) Technique (1) Research (1) Viruses (1) Vaccination (1) Infections (1) Vocación (1) Bronquitis (1) Inmunoglobulinas (1) Infecciones (1) Suero (1) Investigación (1) Vacunación (1) Échelle (1) Recherche (1) Phosphatase alcaline (1) Bronchite (1) Sérum sanguin (1) ELISA (1) Infections (1)