BOISE, Idaho (AP) -- The infectious bacterial disease brucellosis has been found in a beef cow in eastern Idaho, and state agriculture officials are scrambling to see if the infection is isolated or if it has spread to other herds.

Idaho Department of Agriculture state veterinarian Bill Barton sent a memo to state animal health officials on Monday, saying that a beef cow from a newly assembled 600-head herd tested positive for brucellosis. Barton's memo said no calves or bred females had been sold from the herd, which has been quarantined.

Epidemiologists are trying to determine the source of the infection.

Brucellosis is rarely transmitted to humans but can cause spontaneous abortions, infertility, decreased milk production and weight loss in cattle, elk, bison and other mammals.

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