Underreporting of gestational, congenital and acquired syphilis among indigenous peoples in Mato Grosso do Sul State, Brazil, 2011-2014.

Objective: to describe the distribution, incidence, and underreporting of syphilis among indigenous peoples from Mato Grosso do Sul, Brazil.

Methods: descriptive study performed with secondary data of the Information System for Notifiable Diseases (Sinan) and of the Special Indigenous Sanitary District of Mato Grosso do Sul (DSEI-MS), from 2011 to 2014; the data from both sources were compared to identify underreporting.

Results: the highest incidence rates of syphilis in pregnant women were observed in 2014 (41.