Vibriosis in Farm Reared White Shrimp, Litopenaeus Vannamei in Andhra Pradesh-Natural Occurrence and Artificial Challenge

S.K Aktharunnisa Begum,S.A Mastan

doi:10.3126/ijasbt.v4i2.15126

S.K Aktharunnisa Begum, S.A Mastan

Open Access

https://doi.org/10.3126/ijasbt.v4i2.15126

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Abstract

In the present study, a total of five species of Vibrio bacteria were isolated from diseased shrimp, Litopenaeus vannamei, collected from commercial shrimp cultured ponds of Eethamukkala, Chinaganjam and Pedaganjam areas, Prakasam district, Andhra Pradesh. The isolated bacterial species were identified as Vibrio parahaemolyticus, Vibrio harveyi, Vibrio alginolyticus, Vibrio mimicus and Vibrio vulnificus. The symptoms shown by diseased shrimps include loss of appetite, red coloration of the body and pleopods, gills often appear red to brown in colour, reduced feeding, empty gut and general septicemia. In diseased shrimp, hepatopancrocytes may appear poorly vacuolated, indicating low lipid and glycogen reserve. In affected shrimps, localized lesions were also observed in the cuticle. Experimental infection trials reveals that V. parahaemolyticus is highly pathogenic to L. vannamei while V. harveyi found to be moderate pathogenic to challenged shrimp and remaining three bacterial species namely V.alginolyticus, V.mimicus and V.vulnificus were less pathogenic in nature.Int J Appl Sci Biotechnol, Vol 4(2): 217-222

Highlights

The intensification of the shrimp culture and the transfer of aquatic organisms worldwide have been accompanied over the last twenty years by an increased incidence of microbial infectious pathogens
The isolated bacteria were identified as Vibrio parahaemolyticus, Vibrio harveyi, Vibrio alginolyticus, Vibrio mimicus and Vibrio vulnificus
Among the five bacterial species V. parahaemolyticus and V. harveyi has dominated in all diseased shrimp samples

Summary

Introduction

The intensification of the shrimp culture and the transfer of aquatic organisms worldwide have been accompanied over the last twenty years by an increased incidence of microbial infectious pathogens. In this regard, bacterial diseases due to Vibrio species are often associated with low survival rates in hatchery or grow out conditions (Denis Saulnier et al, 2000). Vibrio-related infections occur in hatcheries, but epizootics commonly occur in pond reared shrimp species. This disease is caused by gram-negative bacteria of the family Vibrionaceae. Begum (2016) Int J Appl Sci Biotechnol, Vol 4(2): 217-222 in Andhra Pradesh-Natural occurrence and artificial challenges

Materials and Methods

Results and Discussion

Conclusion