Followings are FYI.
Most jurisdictions also recognize "per se" defamation, where the allegations are presumed to cause damage to the plaintiff.
Typically, the following may consititute defamation per se:
Attacks on a person's professional character or standing;
Allegations that an unmarried person is unchaste;
Allegations that a person is infected with a sexually transmitted disease;
Allegations that the person has committed a crime of moral turpitude;
(Source: ExpertLaw http://www.expertlaw.com/library/personal_injury/defamation.html)