Lost is a lost cause indeed. The place is crawling with those cyan bastards. As for detailed information, I can't really tell you more than you already know. The nomads were and still are biological killing machines with a never ending hunger for destruction. Originally, there was one "major" organization and people referred to them as "K'Hara". Nowdays, they are a very rare sight. Perhaps they completed their short term goals and went back to whatever it is they call home down in Iota and Major. Alternatively, the one you fought, Vagrants, could have wiped them out. Although, the former is nothing but an alien conspiracy theory.
Anyhow, we do know they are all connected. Call it a hive mind, if you would. They communicate with humans via "telepathy". Such a crude word, but it's easy to understand. They are exceptionally well organized, but every once in a while, there's the occasional rogue. Perhaps a result of a unusual mutation, much like rare genetic diseases in humans, or maybe a result of something else entirely, I've no clue. We haven't been able to capture a live specimen so far. When I think about, we haven't been able to capture a live specimen at all. That's what the official records state anyways.
Furthermore, they are supported by a number of... infected humans. You might've heard about "Das Wilde". The rumors are true man. Or most of it anyways. Thing is, sometimes, those who support them are not infected or they try to conceal it. We have advanced screening equipment installed in almost all of our facilities and warships. It's really not that hard to detect them. Abnormal body temp, messed up chemicals in the system, unusual brain activity, arrhythmia. Of course, the tech is not 100% fool proof. In some cases, it can fail to detect the parasite in the host. Or in other cases, there is no parasite.
Believe or not, there are people ready to betray the human kind. People that will work for and support the nomads. Some do it for technological advancements, others for their next dose of liquid cardamine. Then there's the homicidal psychos who do it for chips and giggles. I hate them the most. I have a very, very long list of possible infectees and nomad collaborators and some of them are really high in the ranks of multiple organizations, including my own.
Well, that about sums it up. As I said, nothing new but it's all I can give you without having my head separated from my body and vented into space. It'd be a really unpleasant experience.
Do have a nice day, Mr. Stenn and if you need anything else, you know how to find me.
~19.