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Table 2 Haematological and immunological parameters (mean ± SD) of hybrid red tilapia on days 7, 21 and 49 post-vaccination, before challenge

From: Haemato-immunological responses and effectiveness of feed-based bivalent vaccine against Streptococcus iniae and Aeromonas hydrophila infections in hybrid red tilapia (Oreochromis mossambicus × O. niloticus)

Groups Days after Haematological parameters Immunological parameters
MCH
(pg)
MCHC
(g/dl)
Haematocrit
(%)
Lysozyme activity
(units/ml)
Phagocytic activity (%) Antibody level (IgM) (450 nm)
Unvaccinated 7 (dpv) 14.24 ± 2.24a 29.43 ± 2.94a 17.32 ± 4.21a 93.73 ± 2.08d 23.41 ± 2.03c 0.23 ± 0.02a
BS 13.75 ± 5.32a 31.38 ± 3.82a 17.94 ± 5.26a 158.35 ± 9.62c 27.74 ± 1.52b 0.27 ± 0.06a
BF 13.90 ± 4.22a 28.96 ± 5.89a 19.71 ± 4.97a 212.77 ± 8.98a 32.00 ± 1.40a 0.27 ± 0.04a
MS 14.12 ± 3.96a 30.63 ± 6.67a 18.52 ± 2.74a 202.17 ± 4.08a,b 32.10 ± 1.51a 0.28 ± 0.03a
MA 13.24 ± 4.87a 29.91 ± 6.65a 18.72 ± 5.25a 192.96 ± 5.50b 30.84 ± 1.35a 0.26 ± 0.05a
Unvaccinated 21 (dpv) 16.71 ± 2.07a 38.58 ± 3.15a 17.79 ± 2.24a 93.60 ± 2.80d 24.21 ± 3.54b 0.25 ± 0.03c
BS 15.95 ± 1.52a 39.28 ± 1.74a 18.58 ± 4.01a 204.16 ± 9.10a,b 34.55 ± 2.53a 0.40 ± 0.08b
BF 14.98 ± 3.23a 40.91 ± 3.28a 20.17 ± 5.85a 264.78 ± 6.99a 38.27 ± 4.12a 0.62 ± 0.02a
MS 16.63 ± 2.48a 43.99 ± 4.86a 19.44 ± 3.80a 253.68 ± 6.78a,b 39.67 ± 6.51a 0.49 ± 0.09b
MA 13.68 ± 1.45a 40.92 ± 3.80a 17.85 ± 6.67a 242.55 ± 6.26c 36.28 ± 4.32a 0.50 ± 0.03b
Unvaccinated 49 (dpv) 17.10 ± 3.01a 36.27 ± 2.17a 16.49 ± 4.41a 94.75 ± 4.43d 23.66 ± 3.92b 0.21 ± 0.04c
BS 16.97 ± 4.10a 38.39 ± 2.47a 18.86 ± 2.75a 207.84 ± 9.43c 33.17 ± 5.10a,b 0.58 ± 0.03b
BF 15.93 ± 4.16a 40.75 ± 4.29a 19.69 ± 4.39a 325.90 ± 6.02a 40.88 ± 5.02a 0.78 ± 0.02a
MS 17.01 ± 4.43a 40.13 ± 6.58a 17.86 ± 2.04a 313.34 ± 5.19a,b 39.63 ± 7.81a 0.71 ± 0.01a
MA 15.92 ± 4.05a 43.45 ± 5.83a 17.92 ± 3.27a 303.05 ± 8.57b 38.92 ± 7.22a 0.63 ± 0.03a,b
  1. a-dMeans within the same column shows a significantly different effect (P < 0.05)