Grey seals congregate and relax on Billingsgate
Shoal, Cape Cod. Fecal samples from live seals and birds revealed that
even apparently healthy marine animals such as these seals can harbor
pathogens, including antibiotic-resistant microbes and Giardia, an intestinal parasite that can cause fever, vomiting, and diarrhea that is well known to hikers.
(Photo by Jim Canavan, WHOI. NOAA Permit 775-1875-00)[back]
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