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Antibacterial activity of silver nanoparticles (AgNps) synthesized by tea leaf extracts against pathogenic Vibrio harveyi and its protective efficacy on juvenile Feneropenaeus indicus
Author(s) -
Vaseeharan B.,
Ramasamy P.,
Chen J.C.
Publication year - 2010
Publication title -
letters in applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.698
H-Index - 110
eISSN - 1472-765X
pISSN - 0266-8254
DOI - 10.1111/j.1472-765x.2010.02799.x
Subject(s) - vibrio harveyi , silver nanoparticle , antibacterial activity , agar , microbiology and biotechnology , antibiotics , antimicrobial , biology , antibacterial agent , chemistry , traditional medicine , bacteria , food science , vibrio , nanoparticle , medicine , materials science , nanotechnology , genetics
Aims: To determine the antibacterial potential of silver nanoparticles (AgNps) synthesized by tea leaf extract against Vibrio harveyi and its protective effect on juvenile Feneropenaeus indicus. Methods and Results: AgNps were synthesized by a simple procedure using tea leaf extract as the reducing agent. Bacteriological tests were performed in Luria–Bertani medium on solid agar plates and in liquid systems supplemented with V. harveyi against different concentrations of AgNps. AgNps synthesized in the present study were shown to be effective against V. harveyi isolated from F. indicus. The combined results of long‐ and short‐term treatment of AgNps synthesized by tea leaf extract showed a 71% reduction in accumulated mortality. Conclusions: The long‐term administration of AgNps synthesized by tea leaf extracts at the concentration of 10 μg significantly reduced the mortalities in F. indicus from V. harveyi infections. Significance and Impact of the Study: The AgNps synthesized by tea leaf extract may be an alternative to antibiotics in controlling V. harveyi infections.