Antibiotic and metal resistance of cultivable bacteria in the Antarctic sea urchin

M. González-Aravena, and R. Urtubia, and K. Del Campo, and P. Lavín, and C.A. Cárdenas, and G. González-Rocha, and Wong, Clemente Michael,Vui Ling (2016) Antibiotic and metal resistance of cultivable bacteria in the Antarctic sea urchin. Antarctic Science. pp. 1-8. ISSN 9541020


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In this paper we report the first characterization of cultivable bacteria obtained from the Antarctic sea urchin Sterechinus neumayeri. The coelomic fluid was obtained from a pool of sea urchins which was plated onto different media to isolate the bacteria. A total of 42 isolates of psychrotrophic and aerobic γ-Proteobacteria (59.5%), Flavobacteria (33.3%) and Actinomycetes (7.2%) were isolated and sequenced. These bacteria were exposed to heavy metals and antibiotics, where 38 strains were analysed by the minimal inhibitory concentration method. Antibiotic resistance was detected in 44% of cultivable strains, and a further 13% presented co-resistance to antibiotics and heavy metals. The genera of bacteria that showed an increased resistance and co-resistance to metals and antibiotics were Flavobacterium, Psychrobacter and Pseudomonas. Additionally, 30.9% of isolated bacterial strains contained plasmids, which are probably related to resistance and co-resistance to metals. These results indicate that sea urchin-associated bacteria could be reservoirs for antibiotic resistance genes.

Item Type: Article
Uncontrolled Keywords: Antarctica; coelomic fluid; multi-resistance; Sterechinus neumayeri
Subjects: Q Science > QL Zoology
Depositing User: Unnamed user with email
Date Deposited: 03 Aug 2016 06:16
Last Modified: 23 Oct 2017 05:26

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