Figure. . Monthly distribution of human Streptococcus suis infections in 2 referral hospitals, Vietnam, 2007–2010. Humans infected with S. suis during 2007–2009 are presented as mean total cases per month. Dark gray and black bars represent the number of S. suis case-patients at the Hospital for Tropical Diseases in Ho Chi Minh City during 2007–2009 and 2010, respectively. Light gray and white bars represent human S. suis cases at the National Hospital for Tropical Diseases in Hanoi during 2007–2009 and 2010, respectively.