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The discovery threatened US wheat exports which totaled $8.1 billion in 2012. [334] Japan, South Korea and Taiwan temporarily suspended winter wheat purchases as a result of the discovery. [ 335 ] [ 336 ] [ 337 ] As of August 30, 2013, while the source of the modified wheat remained unknown, Japan, South Korea and Taiwan had resumed placing orders.
Diagnostics using DNA-based tools, such as polymerase chain reaction, are increasingly popular due to their specificity and speed, compared to culture-based methods. [190] These methods also allow the detection and identification of " viable but nonculturable " cells that are metabolically active but non-dividing. [ 191 ]