Effect of ultraviolet (UV) radiation on the abundance and respiration rates of probiotic bacteria. Issue 2 (28th November 2011)

• Record Type: Journal Article
• Authors: Angélica Garrido‐Pereira, M.; Braga, André Luiz; Rocha, Andréa Ferretto da; Sampaio, Luís André; Abreu, Paulo César
• Is Part Of: Aquaculture research. Volume 44:Issue 2(2013:Jan.)
• Page Start: 261
• Page End: 267
• Publication Date: 2011-11-28
• Subjects: Aquaculture -- Periodicals; Fishery management -- Periodicals; 639.8
• DOI: 10.1111/j.1365-2109.2011.03029.x
• Languages: English
• ISSNs: 1355-557X

Abstract

<abstract abstract-type="main" xml:lang="en" id="are3029-abs-0001"> <title>Abstract</title> <p>Effects of ultraviolet radiation (UV) on probiotic bacteria (<italic>B</italic><italic>acillus subtilis</italic> and <italic>B</italic><italic>. licheniformis</italic>) were tested in two experiments, with the following treatments: (i) UV treatment – using fluorescent and UV‐lamps and (ii) Control – CTRL, using fluorescent lamps. Bacterial abundance and respiration were evaluated every 24 h for 3 days for Experiment 1, and at 0, 6 and 24 h for Experiment 2. In the Experiment 1, total UV dose was 4 336.41 mW cm⁻². UV treatment presented small respiration rates only on day 3, while in the CTRL oxygen consumption was always high. On all days, the abundance of the <italic>B</italic><italic>acilli</italic> exposed to UV was significantly smaller than that of the CTRL. The second experiment, with total UV dose of 1 445.47 mW cm⁻², presented oxygen consumption in the UV treatment only during the first 6 h. In the CTRL, oxygen consumption increased from the beginning due to the bigger abundance <italic>B</italic><italic>acilli</italic> cells. Small coccus‐shaped bacteria ocurred in the UV treatment of both experiments. It may be concluded that exposure to UV, normally used for water disinfection, can inactivate probiotic bacteria.</p> </abstract>