This file photo shows a South Korean customer looks at local beef at a Lotte Mart as the store suspended sales of all US beef in Seoul on April 25, 2012.  (PHOTO / AFP)

SEOUL - South Korea on Monday began strengthening quarantine inspection on US beef imports after the outbreak of a mad cow disease in the United States.

The Ministry of Agriculture, Food and Rural Affairs said it decided to increase the proportion of sampling inspections on imported US beef from 3 percent to 10 percent beginning Monday as a preliminary measure.

The confirmation of an atypical case of bovine spongiform encephalopathy (BSE) at a slaughterhouse in South Carolina. 

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It followed the confirmation of an atypical case of bovine spongiform encephalopathy (BSE) at a slaughterhouse in South Carolina.

The ministry asked the US government to provide epidemiological information on the atypical BSE outbreak, noting that it will take additional measures, if necessary, after reviewing the US epidemiological probe and having meetings with relevant agencies and experts.

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There has been no case of the atypical BSE that led to human infection, according to the ministry.