Blood biochemical parameters and melanomacrophage centers in Nile tilapia fed essential oils of clove basil and ginger. Issue 74 (March 2018)

• Record Type: Journal Article
• Authors: Brum, Aline; Pereira, Scheila Anelise; Cardoso, Lucas; Chagas, Edsandra Campos; Chaves, Francisco Célio Maia; Mouriño, José Luiz Pedreira; Martins, Maurício Laterça
• Is Part Of: Fish & shellfish immunology. Issue 74(2018)
• Page Start: 444
• Page End: 449
• Publication Date: 2018-03
• Subjects: Fish -- Triglycerides -- Cholesterol -- Lysozyme -- Immunoglobulins -- Spleen; Fishes -- Immunology -- Periodicals; Shellfish -- Immunology -- Periodicals; Poissons -- Immunologie -- Périodiques; Crustacés -- Immunologie -- Périodiques; 571.9617
• DOI: 10.1016/j.fsi.2018.01.021
• Languages: English
• ISSNs: 1050-4648

Abstract

Abstract: Nile tilapia ( Oreochromis niloticus ) is the most farmed freshwater fish in the world, however, disease outbreaks are the main cause of losses in production. Due to this, there is an increasing interest in natural products for enhancing disease resistance, without causing physiological impairment. The aim of this study was to verify the effect of the essential oils of clove basil ( Ocimum gratissimum ) and ginger ( Zingiber officinale ) on physiological and immunological parameters of nile tilapia. After 35 and 55 days of supplementation (0.5%, 1.0% and 1.5%), blood collection was performed for determination of metabolites (glucose, cholesterol, triglycerides, serum total protein and immunoglobulins) and lysozyme activity. Spleen tissue was also collected at 55 days for analyzing melanomacrophages centers. At 35 days, cholesterol showed significant reduction in the treatments 0.5% and 1.5 ginger and 1.5% clove basil. The serum triglycerides showed significant reduction in these same treatments, in addition to 1.0% clove basil. At 55 days all the supplemented groups showed significant reduction for both parameters. The lysozyme activity at 35 days was significantly higher in fish supplemented with 1.0% ginger and showed no difference among the treatments at 55 days. Regarding the melanomacrophage centers, at 35 days increased number in fish supplemented with 0.5% clove basil was observed but with no significant difference in the total percent area of spleen occupied by centers. The levels of glucose, total serum protein and immunoglobulins did not show significant differences in both sampling times. The addition of essential oils showed to be useful for improving physiological status of the fish, without excessive activation of defense mechanisms. Graphical abstract: Image 1 Highlights: Tilapia juveniles were fed essential oils of clove basil and ginger for 55 days. Both essential oils reduced serum cholesterol and triglycerides. Immune parameters were not unnecessarily activated at the end of the trial.