levels of total leucocyte and neutrophil, lymphocytes counts as well as neutrophil/lymphocyte ratio of chicken groups received immunostimulants, vIBDV at 14 days of age and vNDV challenge at 21 days of age at 0, and 3 days post NDV challenge. IBD and NDV infections resulted in undetected basophiles at 0 and 3 days in compared with Lector treated Gp 6 and non-infected non-treated control Gp 10 (table 4). N/L ratio at 0 time Lector + IBD Gp 1 (Table 4, Figure 1D) showed the highest value 0.35 followed by 0.33 in Oregosol+IBD Gp 4 and 0.31 in ND Gp 9 and control Gp10 while the lowest ratio 0.25 was in IBD Gp7. N/L ratio at the 3rd day post NDV challenge immunostimulants treated Gps showed the highest values (0.33) than control Gp10 (0.31), followed by Gps 9, 2 and 3 (0.30, 0.29 and 0.29).