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The bacterium Brucella pinnipedialis has little effect on the health of the hooded seal

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A doctoral research project studying the bacterium Brucella pinnipedialis, which commonly occurs in hooded seals, found that this bacterium does not cause disease in hooded seals, as other Brucella bacteria do in other species.

The occurrence of the bacterium B. pinnipedialis in hooded seals can hence not explain the decline in the Northeast Atlantic population of hooded seals. The potentially immunosuppressive effects of the pollutant PCB 153 may affect the immunedefence system of the hooded seal to the extent that the outcome of the infection is altered, but no such effects were found to occur in an experimentalinfection in mice.

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