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- W4386567009 abstract "This study investigated the efficacy of co-administration of Spirulina platensis (SP) with vaccines on the immune response to Avian influenza (AI), Infectious bronchitis (IB), and Newcastle disease (ND), along with I/M challenging by virulent ND virus genotype VII. 126 one-day-old broiler chicks were allocated into six groups (21 birds/group with three replicates): G1: negative control; G2: positive control; G3: vaccinated, non-SP-supplemented; G4: vaccinated, SP-supplemented (0.1%); G5: vaccinated, SP-supplemented (0.3%); and G6: vaccinated, SP-supplemented (0.5%). G2–6 were challenged with a velogenic NDV genotype VII virus. Dietary SP administration prevented the ND-induced mortality compared to G2 (52.4%) and G3 (14.3%), in addition to alleviating the clinical disease. G3–6 showed significant improvement in body weight loss% and FCR during two weeks post vNDV challenge, and the overall FCR (2.64 ± 0.28, 1.56 ± 0.03, 1.60 ± 0.05, 1.53 ± 0.04, and 1.54 ± 0.03 for G2, 3, 4, 5 and 6, respectively) (P˂0.05). On the day of the challenge, the ND-HI titer (log2) of G3 (5.44 ± 0.24) was numerically higher than G6 (4.20 ± 0.55) and lower than G4 (6.10 ± 0.34) and G5 (6.00 ± 0.28). On the 10th day pc, ND-HI titer in G4–6 was numerically lower in a dose-dependent manner than that of G3, suggesting an antiviral efficacy of SP. G4–6 had lower viral shedding titer than G2 and G3 (P˂0.05). In G3–6, viral shedding was reduced by 15, 27, 7, 24, and 33.6%, respectively. In addition, the histopathological lesions in the trachea, lung, and spleen were severe in G2, moderately reduced in G3, and more relieved in G4–6. At three weeks after vaccination, the HI antibody titer of AIH5 was significantly higher after SP administration, especially at the 0.3% level, compared to the vaccine alone (P 0.05), demonstrating an immune-stimulating effect. In conclusion, dietary administration of SP, particularly a dose of 0.3%, for vaccinated chickens against NDV exerted an antiviral effect by preventing deaths, alleviating clinical disease and weight loss, and decreasing viral shedding post heterologous NDV challenge." @default.
- W4386567009 created "2023-09-10" @default.
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- W4386567009 date "2023-11-01" @default.
- W4386567009 modified "2023-09-30" @default.
- W4386567009 title "Evaluating the effect of Spirulina platensis on the immune response of broiler chickens to various vaccines and virulent Newcastle disease virus challenge" @default.
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- W4386567009 doi "https://doi.org/10.1016/j.rvsc.2023.105012" @default.
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