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- Title
Immunomodulatory effect of Cynodon dactylon against white tail disease of giant freshwater prawn, Macrobrachium rosenbergii (de Man, 1879).
- Authors
Farook, Mohamed A; Vimal, Sugumar; Madan, Nithiyanandam; Taju, Gani; Abdul Majeed, Seepoo; Nambi, Kalaiselvi S N; Balasubramanian, Gnanavel; Sahul Hameed, Azeez S
- Abstract
The giant freshwater prawn, Macrobrachium rosenbergii, is an economically important and extensively cultured crustacean worldwide. The viral pathogens, Macrobrachium rosenbergii nodavirus ( Mr NV) and extra small virus ( XSV) are responsible for causing severe mortalities in the hatchery and nursery phases. This study investigates the protection of postlarvae of freshwater against white tail disease ( WTD) using plant extract derived from Cyanodon dactylon and the modulation of the prawn non-specific immunity. To determine the immunomodulatory effect of C. dactylon extract, the prawn was injected with plant extract and various immunological parameters were estimated. The immunological parameters such as pro PO, SOD, THC and clotting time were found to be significantly higher in the plant extract-injected prawn when compared with control groups. The results of real time PCR analysis revealed up regulation on the expression pro PO, SOD and lysozyme genes in Mr NV and XSV challenged prawn postlarvae treated with C. dactylon extract. Infectivity experiment showed high relative per cent survival in Mr NV and XSV-challenged prawn postlarvae treated with C. dactylon extract. These results strongly indicate that the administration of C. dactylon plant extract enhances immunity of the prawn. Based on the results, this study recommends that the immersion of postlarvae in C. dactylon plant extract is a potential prophylactic agent against WTD.
- Subjects
BERMUDA grass; MACROBRACHIUM rosenbergii; SHRIMP diseases; NODAVIRUSES; SHRIMPS
- Publication
Aquaculture Research, 2016, Vol 47, Issue 11, p3421
- ISSN
1355-557X
- Publication type
Article
- DOI
10.1111/are.12789