Is pork impure or not? If someone touches pork, is he obliged to perform Ghusl (ritual bath) like the case when one gets a wet dream?

All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.

Pork is impure. Allaah Says (what means): {…or the flesh of swine, for indeed, it is impure.}[Quran 6:145]. If a person touches pork with his hands, he is obliged to wash his hands only in order to remove the impurity from then, but he is not obliged to perform Ghusl (ritual bath) and wash all his body. 

Allaah Knows best.