The effect of guava leaves (Psidium guajava L.) in feed with different extraction methods on the immunity of vaname shrimp (Litopenaeus vannamei) challenged by Vibrio parahaemolyticus

Immunostimulant Feed Extraction Method Guava leaves

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May 13, 2026

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Diseases in vaname shrimp can cause economic losses, reduced production, and, in extreme cases, crop failure due to mass mortality. One disease that frequently occurs in intensive ponds of Litopenaeus vannamei is vibriosis, caused by Vibrio parahaemolyticus. Efforts to enhance shrimp immune responses by administering immunostimulants aim to prevent disease. One natural ingredient that can act as an immunostimulant is guava leaves (Psidium guajava L.). Common methods for producing guava leaf extract include maceration, Soxhlet extraction, and ultrasonics, but these methods are expensive. One solution is conventional extraction methods, such as flouring, boiling, and blending. The purpose of this study was to evaluate the effect of adding guava leaf extract to feed, using different extraction methods, on the immune response of whiteleg shrimp and to test it against V. parahaemolyticus. The method used was a randomized design with 5 treatments and 3 replications. The measured parameters in this study consisted of SR, FCR, SLGR, SWGR, media TVCs, THC, DHC, PA, and water quality. The results showed that P5 (blender method) with an SR value of 80%, FCR 1.1, SLGR 3 %/day, SWGR 8,2 %/day, media TVCs 20x102 CFU/mL, THC 16x106 cells/mL, hyaline cells 63.3%, and PA 68% showed the highest value compared to other treatments.