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Evaluate the effects of olive leaf extract on growth, intestinal health, and disease resistance in juvenile Litopenaeus vannamei.

August 7, 2026AnimalsOpen Access

The Effect of Low-Fishmeal Feed Including an Olive Leaf Extract (Olea europaea) Additive on Growth, Intestinal Health and Disease Resistance in Litopenaeus vannamei

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Evaluate the effects of olive leaf extract on growth, intestinal health, and disease resistance in juvenile Litopenaeus vannamei.
Juvenile shrimp were fed diets with varying olive leaf extract levels (0%, 0.10%, 0.20%, 0.40%, 0.80%) added to a 12% fishmeal baseline.
Groups were compared based on growth metrics, serum indices, and mRNA expression levels.
Intestinal microbiome analysis and post-challenge survival assays were conducted.
The OLE1 group showed increased weight gain rate and specific growth rate; feed conversion ratio declined (p < 0.05).
Significantly higher total protein content and reduced low-density lipoprotein cholesterol levels were observed in the OLE groups compared to control (p < 0.05).
OLE4 and OLE8 groups had higher cumulative survival rates post-challenge (p < 0.05).

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Randomized trial evaluates olive leaf extract for growth, health, and disease resistance in juvenile shrimp, suggesting enhanced performance.

阳运登 et al. (2026) studied this question.

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Randomized trial evaluates olive leaf extract for growth, health, and disease resistance in juvenile shrimp, suggesting enhanced performance.