Chlamydia pneumonia infection and risk of multiple sclerosis: A meta-analysis.

Background: The role of infectious agents, including Chlamydia pneumoniae (Cpn), in the development of multiple sclerosis (MS), is still a matter of major contention.

Objective: This meta-analysis study aimed to assess the actual involvement of Cpn in MS development.

Methods: We undertook a search of international scientific databases to identify eligible studies.