Not knowing the story, just reading from this post, I would deduce they all had casual contact with the same individual who probably did have highly contagious Norwegian scabies.

The alternative is that one of the TSOs has Norwegian scabies. Either way, whoever has Norwegian scabies is highly infectious, others aren't. Similarly, the cleaner of an airplane could have Norwegian scabies and infect quite a few people via the seats -- does this mean cleaning 'planes is a bad idea in general?

tb

PS I'm no fan of the TSA, but I think that some of the more hysterical posts are somewhat wide of the mark.