Anchor: South Korean health authorities are yet to determine the infection routes regarding two recent cases of Cholera in the country. The South Korean Centers for Disease Control and Prevention(CDC) said that given its epidemiological study so far, the most likely culprit is seawater infected with cholera germs.
Kim Bum-soo has more. 

Report: The two contracted with cholera ate raw seafood from the southern island city of Geoje, South Gyeongsang Province.

The South Korean Centers for Disease Control and Prevention(CDC) has been seeking to find a third person, like a cook or a common friend of the two, possibly a missing link between the two patients. 

Briefing the preliminary result of the epidemiological study on Sunday, the CDC’s Center for Infectious Disease ruled out the possibility.

[Sound bite: Cho Eun-hee - Center for Infectious Disease at the Centers for Disease Control and Prevention (Korean)]
“So far, the two patients are presumed to have been infected through a separate food intake and there seems to be no relation to the spread of the disease between the two."

Health authorities tested everyone the two patients met before and after their infections. Cooking utensils used in processing the raw seafood dishes in question also tested negative for the disease.

The CDC suspects that seawater in the Geoje Island coast is possibly contaminated with the bacteria.

For two weeks starting from Monday, the Ministry of Oceans and Fisheries will investigate water samples from six maritime points off Geoje Island, which are not included in the government's monthly checks.
Kim Bum-soo, KBS World Radio News.