E-viri
Recenzirano
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Medina Félix, Diana; Cortés Jacinto, Edilmar; Isidro Campa Córdova, Ángel; Antonio López Elías, José; Rafael Martínez Córdova, Luis; Luna González, Antonio; David Leal Soto, Sergio
Journal of invertebrate pathology, January 2022, 2022-01-00, 20220101, Letnik: 187Journal Article
Display omitted •Highest shrimp survival recorded with 2% Dunaliella sp. after infection.•Dunaliella sp. 2% reduced lipid oxidation, increased hemocytes and SOD gene expression.•Dunaliella sp. 2% in shrimp diet enhanced stress response against bacterial infection. The presence of pathogen agents in shrimp farming is the main obstacle for successful aquaculture. Vibrio species are naturally part of water because they play an important role as opportunistic bacteria. Vibrio parahaemolyticus was identified as the causative agent of the Early Mortality Syndrome in 2009, causing the loss of shrimp farming worldwide. Dunaliella sp. flour has been tested against Vibrio infection proving to be an effective prophylactic method that decreases mortality and improves physiological and immune response in Litopenaeus vannamei. Juvenile shrimp were exposed to 2% Dunaliella sp. flour and commercial 1.1% β -glucan diet provided every other day for 15 days and a posterior infection with V. parahaemolyticus (1 × 106 CFU/mL). To evaluate shrimp stress status, some parameters as glucose, lactate, cholesterol, triglycerides, relative superoxide dismutase (SOD) gene expression and circulating hemocytes were analyzed in hemolymph at zero and seven days before infection and at 0, 24, and 48 h post-infection. L. vannamei fed with Dunaliella sp. showed 93% and β -glucan 87% survival, compared with 79% in the infected control group. Additionally, Dunaliella sp. improved hemocyte and lipid concentrations compared to β -glucan while both immunostimulants showed an increase in SOD response against bacteria. The addition of 2% Dunaliella sp. every other day in L. vannamei diet enhanced stress response against V. parahaemolyticus infection.
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