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Lymphocytic Choriomeningitis Virus Infection and House Mouse (Mus Musculus) Distribution in Urban Baltimore

James E. Childs Department of Immunology and Infectious Diseases, The Johns Hopkins University School of Hygiene and Public Health, Virology and Disease Assessment Divisions, United States Army Medical Research Institute of Infectious Diseases, Baltimore, Maryland

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Gregory E. Glass Department of Immunology and Infectious Diseases, The Johns Hopkins University School of Hygiene and Public Health, Virology and Disease Assessment Divisions, United States Army Medical Research Institute of Infectious Diseases, Baltimore, Maryland

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George W. Korch Department of Immunology and Infectious Diseases, The Johns Hopkins University School of Hygiene and Public Health, Virology and Disease Assessment Divisions, United States Army Medical Research Institute of Infectious Diseases, Baltimore, Maryland

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Thomas G. Ksiazek Department of Immunology and Infectious Diseases, The Johns Hopkins University School of Hygiene and Public Health, Virology and Disease Assessment Divisions, United States Army Medical Research Institute of Infectious Diseases, Baltimore, Maryland

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James W. Leduc Department of Immunology and Infectious Diseases, The Johns Hopkins University School of Hygiene and Public Health, Virology and Disease Assessment Divisions, United States Army Medical Research Institute of Infectious Diseases, Baltimore, Maryland

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Four hundred eighty house mice (Mus musculus) were trapped primarily from urban sites in Baltimore, Maryland from 1984 to 1989 and tested for antibody to lymphocytic choriomeningitis virus (LCMV). The majority of mice (95%) were trapped in residences at two city locations (n = 260), or in an urban park (n = 196); five additional sites were sampled. Overall, 9.0% of the mice were LCMV antibody positive and infected animals were obtained from six of eight sites, including all three of the primary city sites, where the prevalence varied significantly (3.9–13.4%). The location with the highest prevalence was an inner city residential site where positive mice were found significantly clustered within blocks and households. In this location, LCMV antibody prevalence was also significantly correlated with estimates of mouse density within individual blocks. The focal nature of LCMV infection in house mice may result from contact or vertical transmission of virus in conjunction with the highly structured social system of mice, which promotes inbreeding and limited dispersal.

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