Follow
International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39 For more details click here
National Academy of Agricultural Sciences (NAAS) : NAAS Score: *5.38 (2020) [Effective from January 1, 2020]For more details click here

Login as a Reviewer

Indexed in



National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2018: 95.39
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39
For more details click here

See Guidelines to Authors
Current Issues

Original Research Articles

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2017.6(7): 62-76
DOI: https://doi.org/10.20546/ijcmas.2017.607.008


Evaluation of Efficacy of Oxytetracycline Oral and Bath Therapies in Nile Tilapia, Oreochromis niloticus against Aeromonas hydrophila Infection
R. Beryl Julinta1, Anwesha Roy1, Jasmine Singha1, T. Jawahar Abraham1* and P.K. Patil2
1Department of Aquatic Animal Health, Faculty of Fishery Sciences, West Bengal University of Animal and Fishery Sciences, Chakgaria, Kolkata – 700 094, West Bengal, India
2Central Institute of Brackishwater Aquaculture, Indian Council of Agricultural Research, Raja Annamalai Puram, Chennai – 600028, Tamil Nadu, India
*Corresponding author
Abstract:

Aeromonas hydrophila is a potent pathogen that causes mortalities in tilapia. The present study evaluated the effectiveness of oxytetracycline (OTC) oral and bath therapies on Nile tilapia Oreochromis niloticus against A. hydrophila infection. Medicated feed was prepared by admixing oxytetracycline dihydrate powder and fed to fish at 60 mg OTC kg/biomass/day for 10 days. Bath therapy was done by immersing the fries in OTC suspensions (20 mg/l) for 1 h for 4 days. Aeromonas hydrophila was moderately virulent, causing 20-55% mortalities at 2×106 - 2×107cfu/ml level by abrasion-bath treatment. The LD50 value for juvenile tilapia was 6×107cfu/fish. Efficacy of OTC was evaluated by abrading the tilapia followed by immersion in A. hydrophila suspension containing 2×107-5×107cfu/ml for an hour. After 3 days of disease progression, the fish were given OTC feed and/or bath treatment. The oral and bath therapies in fries with OTC recorded low mortalities (17 and 21%) than the respective control (37 and 24%). The juveniles appeared to be susceptible to A. hydrophila than the fries. It recorded 66.7% mortality in OTC fed group than in control (90%). The oral therapy was better than the bath therapy against A. hydrophila infection. Since OTC is one of the approved antibiotics for treating bacterial diseases of fish and effective in controlling A. hydrophila, judicious use of OTC feed is recommended for the control of Aeromonas infection in tilapia.


Keywords: Oreochromis niloticus, Aeromonas hydrophila, Oxytetracycline, Medicated feed, Bath treatment.
Download this article as Download

How to cite this article:

Beryl Julinta, R., Anwesha Roy, Jasmine Singha, T. Jawahar Abraham and Patil, P.K. 2017. Evaluation of Efficacy of Oxytetracyclineoral and Bath Therapies in Nile Tilapia, Oreochromis niloticus against Aeromonas hydrophila Infection.Int.J.Curr.Microbiol.App.Sci. 6(7): 62-76. doi: https://doi.org/10.20546/ijcmas.2017.607.008