Another is this an Infection? (pics)

[Gluten]

been in the secondary for 4 months

when disturbed it looks similar to yeast moving with that stringy pattern that yeast likes to move in. I'd like to think that's what it is but after sitting for 4 months it should have dropped by now.

 

[iqoair]

Drink it and find out! No disease causing micro organism can live in beer.

 

[Dalarast]

Bottle it and drink it... if still worried give it to some friends and get their reaction..