What are diseases / parasites you can catch from birds (not eating, but handling live ones) that can manifest in you as psychiatric symptoms like ocd?

None. As far as i know, there are no bird-borne infectious diseases associated with ocd -- but people who have ocd may have contamination fears involving birds (and many other things). http://tinyurl.com/pewrjwn some streptococcal infections may lead to neuropsychiatric symptoms in kids: pediatric autoimmune neuropsychiatric disorders associated with streptococcal infections (pandas for short).