Possible immunosuppressive effect of a fumigatus. 2.- Histopathological changes of Bursa fabricius, thymus, spleen and the immunological state of vaccinated chicks with Newcastle disease hitchnar B vaccine and infected with Aspergillus fumigatus [Egypt]

aspergillus bazo bolsa de fabricio bourse de fabricius bursa fabricii chickens immunologie immunology immunosuppressants inmunodepresores lymphatic system newcastle disease virus pathologie pathology patologia pollo poulet sistema linfatico spleen virus de la enfermedad de newcastle virus maladie de newcastle