|Chicago Manual of Style
|| A comma is usually used after i.e. and e.g.
|Blue Book of Grammar and Punctuation
||Commas are preferable/optional after the
|The Columbia Guide to Standard American English
|| [Editors] require a comma after the second period [in
|The Guide to Grammar and Writing
|| The comma [following i.e. and e.g.] makes good sense.
|Lynch Guide to Grammar
|| Both abbreviations should be followed by a comma.
|Fowler's Modern English Usage
|| Commas do not usually follow i.e. (No comment on e.g.)
|(Above lines adapted from Grammar
|Wiktionary notes the use of trailing comma is
a US vs. UK usage issue. US uses it, UK doesn't