Executing these commands:

src_emacs-lisp[:wrap latex]{"Aa,b"} @@latex: wrap    @@ 
src_emacs-lisp[:results raw]{"a,b"} @@latex: raw     @@ 
src_emacs-lisp{"A,B,C"} @@latex: macro    @@             
src_emacs-lisp[:results latex]{"a,b"} @@latex: :results latex   @@ 
src_emacs-lisp[:wrap latex]{"a,b"}    @@latex: KEEP ME!!!   @@ 
src_emacs-lisp{"a,b"}                   {{{results(DEELETE ME)}}}   

Gives this output:

src_emacs-lisp[:wrap latex]{"Aa,b"} @@latex:Aa,b@@ 
src_emacs-lisp[:results raw]{"a,b"} a,b 
src_emacs-lisp{"A,B,C"} {{{results(A\,B\,C)}}} 
src_emacs-lisp[:results latex]{"a,b"} @@LaTeX:
a,b@@
 
src_emacs-lisp[:wrap latex]{"a,b"} @@latex:a,b@@    @@latex: KEEP ME!!!   @@ 
src_emacs-lisp{"a,b"} {{{results(a\,b)}}}