Global travelers are being cautioned against bringing back agricultural pests and diseases when returning home after traveling abroad.  International travelers may be a conveyance for pests and diseases that could threaten the States' agriculture and environment. There's been a recent outbreak of foot and mouth disease in South Korea and Vietnam. The animal disease is highly contagious to cattle and swine that affects meat and milk production. State Veterinarian Don Hansen with the Oregon Department of Agriculture has some simple advice: "If you are traveling to those countries, be aware coming back. If you are entertaining guests from those countries, be aware of their presence."Foot and mouth disease is not a food safety issue, and it does not affect human health, but people can be carriers.  Authorities warn you not to bring back vegetables, fruits or plants when traveling outside the country.