Effect of Psidium guajava and Phyllanthus acidus Leaf Extract on Immunostimulant Response of Nile Tilapia Against Streptococcus agalactiae Infection
Date
2018
Contributor
Advisor
Department
Instructor
Depositor
Speaker
Researcher
Consultant
Interviewer
Narrator
Transcriber
Annotator
Journal Title
Journal ISSN
Volume Title
Publisher
Volume
Number/Issue
Starting Page
Ending Page
Alternative Title
Abstract
A study was conducted to investigate the efficacy of diets supplemented with aqueous extract of plants consisting of leaf-extracts of Psidium guajava (PGLE), Phyllanthus acidus (PALE), and the mixture of PGLE and PALE at the rates of 5 and 10 g/kg in the feed of Nile tilapia Oreochromis niloticus. Following 12 weeks of feeding, the fish were challenged with Streptococcus agalactiae for 15 days. Immuno-hematological parameters were measured before and after the challenge. Results showed significantly enhanced innate immune parameters after administration of the plant extracts. Respiratory burst activity, phagocytic assay, and serum lysozyme content were 2 to 3 times higher than that of the control treatment; PGLE-10 group showed the highest values, while fish fed PGLE-10 had the highest post-challenge WBC, RBC, Hb, and Hct values compared to the control. Survival rates were higher in the groups with dietary supplementation of plant extracts compared to the control. The positive immuno-hematological impact of plant extracts show that these can be effectively used as alternative prophylactic and antimicrobial agents in Nile tilapia culture.
Description
Keywords
Nile tilapia, plant extracts, immuno-hematological, Streptococcus agalactiae, Fish culture--Israel., Fish culture
Citation
Extent
9 pages
Format
Geographic Location
Time Period
Related To
Related To (URI)
Table of Contents
Rights
Rights Holder
Local Contexts
Collections
Email libraryada-l@lists.hawaii.edu if you need this content in ADA-compliant format.