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Ordinarily, in order to determine if an infectious bacteria is resistant to certain antibiotics, cultures of that bacteria have to be grown and tested in a lab. The process can take two days or longer, during which time the patient may be getting treated with antibiotics that are later found to be ineffective. Seeking a speedier alternative, scientists at Washington State University have developed a technique in which an electronic probe is used to measure the electrochemical signal produced by bacteria as they metabolize and breathe.