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- Title
Antibacterial Activity of Spirulina (Arthospira platensis Geitler) against Bacterial Pathogens in Aquaculture.
- Authors
Bhuvaneswari, G. Rathi; Shukla, S. P.; Makesh, M.; Thirumalaiselvan, S.; Sudhagar, S. Arun; Kothari, D. C.; Singh, Arvind
- Abstract
The antibacterial activity of seven crude extracts of a cyanobacterium, Arthospira platensis (previously called Spirulina platensis), was evaluated against seven bacterial fish pathogens. The antibacterial activity of the acetone soluble fraction of the A. platensis was considerable against all seven pathogens and equaled the antibacterial activity of the positive control (chloramphenicol) against Aeromonas hydrophila. Edwardsiella tarda was the most susceptible pathogen to this fraction. The minimum inhibitory and minimum bactericidal concentrations were lowest for the acetone soluble fraction. Atomic force microscopy of A. hydrophila cells showed that cell walls were considerably damaged after one hour of exposure to the acetone soluble fraction, i.e., pores, holes, and grooves had formed on the cell envelope. After two hours of exposure, the cells had became permeabilized and collapsed due to disintegration of the cell wall.
- Subjects
ANTIBACTERIAL agents; CYANOBACTERIA; AEROMONAS hydrophila; EDWARDSIELLA tarda; PATHOGENIC microorganisms; CHLORAMPHENICOL; AQUACULTURE
- Publication
Israeli Journal of Aquaculture-Bamidgeh, 2013, Vol 65, p1
- ISSN
0792-156X
- Publication type
Article