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Oral infection of mice with Salmonella enterica serovar Typhimurium causes meningitis and infection of the brain

DOI: 10.1186/1471-2334-7-65

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Five mouse lines including C57BL/6, Balb/c, 129S6-Slc11a1tm1Mcg, 129S1/SvImJ, B6.129-Inpp5dtm1Rkh were used in the murine typhoid model to examine the dissemination of systemic Salmonella enterica serovar Typhimurium following oral infection.We report data on spontaneous meningitis and brain infection following oral infection of mice with Salmonella enterica serovar Typhimurium.This model may provide a system in which dissemination of bacteria through the central nervous system and the influence of host and bacterial genetics can be queried.Salmonella species are Gram-negative, facultative intracellular bacteria that are distributed globally. Two recognized species of Salmonella include S. enterica and S. bongori, with S. enterica serovars Typhimurium, Typhi and Enteriditis causing the vast majority of human infections worldwide. Humans are infected with S. enterica though contaminated food and water and present with a range of acute symptoms including gastroenteritis, fever, and headache. Although systemic infections with S. Typhi are uncommon in developed countries, typhoid remains a significant public health problem in the developing world [1]. Infections with non-typhoidal strains of Salmonella are a global burden, with an estimated 1.4 million cases in the United States alone [2].Salmonella meningitis is an uncommon complication of salmonellosis, occurring more frequently in neonates and infants [3,4], although adult cases are reported. While considered rare in the developed world, Salmonella is a common cause of enterobacterial meningitis in Africa, Brazil and Thailand [4,5]. Cases in adults of Salmonella infection report colonization of the cerebrospinal fluid, fatal brain abscesses caused by intracranial colonization of S. enterica serotype Typhimurium [6], adult Salmonella meningitis [7] and CSF pleocytosis [7]. Mortality rates are typically high, especially in infants where rates have been 60% [8]. Other major issues concerning Salmonella meningitis is a h


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