Pinniped Bites in Swimmers: Treatment Recommendations

From October 2011 to December 2014, 11 swimmers reported bites by a sea lion or harbor seal. All bites involved the lower extremities. Because of the risk of Mycoplasma infection, treatment with a tetracycline is recommended in pinniped bites with signs of infection or serious trauma. 

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Nuckton, T.J., Simeone, C.A. and Phelps, R.T., 2015. California sea lion (Zalophus californianus) and harbor seal (Phoca vitulina richardii) bites and contact abrasions in open-water swimmers: a series of 11 cases. Wilderness & Environmental Medicine, 26(4), pp.497-508.