Is this Nosema ?

[Rich V]

I've noticed somes yellow stains on the front of one of my hives. Today I decided to wash it off. What I found was, that it was more than just a stain. Some of it was at least  1/16 inch maybe a little thicker,and it was very hard to get off. Some of it I had to scrape off with a pocket knive.
Is this a typical  sign of nosema?

Rich V.

[Robo]

Yellowish color is normal.

If it was dark brown, theny they are suffering for some level of dysentery.

Nosema can only be diagnosed by looking ant the bee internals under a microscope.

Bees with dysentery may or may not have nosema.

[Rich V.]

Is it normal for it to be that thick?

[Michael Bush]

http://maarec.cas.psu.edu/pest&disease/slide39.htm

[Finsky]

Link is fine, Michael!