I had one do that this year. I did the test in the linked publication but I didn't have any streaming bacteria. I do have a walnut tree not too far away which can cause wilt but it was only one plant in the middle of others so that doesn't seem likely. I also made sure the drip on that plant wasn't plugged since the plant looked just like it would if I had shut off the water. I'll watch this thread to see if there are any other thoughts
http://www.avrdc.org/pdf/tomato/bacterial_wilt.pdf
Marla