{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,3]],"date-time":"2026-06-03T15:11:07Z","timestamp":1780499467597,"version":"3.54.1"},"reference-count":174,"publisher":"American Society of Tropical Medicine and Hygiene","issue":"6","license":[{"start":{"date-parts":[[2026,6,3]],"date-time":"2026-06-03T00:00:00Z","timestamp":1780444800000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,6,3]]},"abstract":"<jats:title>ABSTRACT.<\/jats:title>\n                  <jats:p>\n                    Lassa fever (LASV;\n                    <jats:italic>Mammarenavirus lassaense<\/jats:italic>\n                    ) is an endemic zoonosis in West Africa. Human infections arise from rodent-to-human transmission, primarily from the synanthropic reservoir\n                    <jats:italic>Mastomys natalensis<\/jats:italic>\n                    (\n                    <jats:italic>M. natalensis<\/jats:italic>\n                    ). In Sierra Leone, small-mammal communities vary across land-use gradients, shaping LASV transmission risk. How anthropogenic environments facilitate the rodent\u2013rodent interactions remains poorly understood. Small mammals were sampled over 43,266 trap nights in Sierra Leone\u2019s LASV-endemic Eastern Province, detecting 684 rodents and shrews. To assess potential transmission, space-sharing networks were constructed from co-trapping events within species-specific home range radii. Shared space use was approximated in these networks, enabling the comparison of encounter patterns across habitats. Network topology varied significantly by land use. Village networks were the most connected (highest average degree), whereas agricultural communities supported the most species (higher rarefied richness) and were the most fragmented (higher modularity). Notably, the probability of intraspecific space sharing among\n                    <jats:italic>M. natalensis<\/jats:italic>\n                    was highest in agricultural settings, suggesting that land use modulates key intraspecific transmission pathways. Lassa fever seroprevalence was 5.7% community-wide, with antibodies detected in nine species. No statistically significant association was found between overall seroprevalence and land use or aggregate network structure (mean degree). However, predictive modeling for\n                    <jats:italic>M. natalensis<\/jats:italic>\n                    indicated that a higher individual degree is associated with seropositivity, suggesting complex, scale-dependent relationships. These findings reveal that simple ecological drivers do not fully explain LASV exposure, highlighting the importance of species-specific behaviors (i.e.,\n                    <jats:italic>M. natalensis<\/jats:italic>\n                    clustering in agriculture) and the multihost serological landscape in assessing transmission risk.\n                  <\/jats:p>","DOI":"10.4269\/ajtmh.25-0120","type":"journal-article","created":{"date-parts":[[2026,4,28]],"date-time":"2026-04-28T17:36:26Z","timestamp":1777397786000},"page":"1198-1211","source":"Crossref","is-referenced-by-count":0,"title":["Contact Networks of Small Mammals Highlight Potential Transmission Foci of Mammarenavirus lassaense"],"prefix":"10.4269","volume":"114","author":[{"given":"David","family":"Simons","sequence":"first","affiliation":[{"name":"Centre for Emerging, Endemic and Exotic Diseases, The Royal Veterinary College, London, United Kingdom;"},{"name":"Centre for Biodiversity and Environment Research, Department of Genetics, Evolution and Environment, University College London, London, United Kingdom;"},{"name":"Department of Clinical Research, London School of Hygiene and Tropical Medicine, London, United Kingdom;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ravi","family":"Goyal","sequence":"additional","affiliation":[{"name":"Department of Medicine, University of California, San Diego, California;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Umaru","family":"Bangura","sequence":"additional","affiliation":[{"name":"Implementation Research, Zoonoses Control, Bernard-Nocht Institute for Tropical Medicine, Hamburg, Germany;"},{"name":"Njala University, Bo, Sierra Leone;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rory","family":"Gibb","sequence":"additional","affiliation":[{"name":"Centre for Biodiversity and Environment Research, Department of Genetics, Evolution and Environment, University College London, London, United Kingdom;"},{"name":"People & Nature Lab, UCL East, Department of Genetics, Evolution and Environment, University College London, London, United Kingdom;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ben","family":"Rushton","sequence":"additional","affiliation":[{"name":"Panadea Diagnostics GmbH, Hamburg, Germany;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dianah","family":"Sondufu","sequence":"additional","affiliation":[{"name":"Njala University, Bo, Sierra Leone;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joyce","family":"Lamin","sequence":"additional","affiliation":[{"name":"Njala University, Bo, Sierra Leone;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"James","family":"Koninga","sequence":"additional","affiliation":[{"name":"Kenema Government Hospital, Kenema, Sierra Leone;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Momoh","family":"Foday","sequence":"additional","affiliation":[{"name":"Kenema Government Hospital, Kenema, Sierra Leone;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mike","family":"Dawson","sequence":"additional","affiliation":[{"name":"Njala University, Bo, Sierra Leone;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joseph","family":"Lahai","sequence":"additional","affiliation":[{"name":"Njala University, Bo, Sierra Leone;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rashid","family":"Ansumana","sequence":"additional","affiliation":[{"name":"Njala University, Bo, Sierra Leone;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elisabeth","family":"Fichet-Calvet","sequence":"additional","affiliation":[{"name":"Implementation Research, Zoonoses Control, Bernard-Nocht Institute for Tropical Medicine, Hamburg, Germany;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Richard","family":"Kock","sequence":"additional","affiliation":[{"name":"Centre for Emerging, Endemic and Exotic Diseases, The Royal Veterinary College, London, United Kingdom;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Deborah","family":"Watson-Jones","sequence":"additional","affiliation":[{"name":"Department of Clinical Research, London School of Hygiene and Tropical Medicine, London, United Kingdom;"},{"name":"Mwanza Intervention Trials Unit, National Institute for Medical Research, Mwanza, Tanzania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kate E.","family":"Jones","sequence":"additional","affiliation":[{"name":"Centre for Biodiversity and Environment Research, Department of Genetics, Evolution and Environment, University College London, London, United Kingdom;"},{"name":"People & Nature Lab, UCL East, Department of Genetics, Evolution and Environment, University College London, London, United Kingdom;"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2795","reference":[{"issue":"3","key":"b1","series-title":"J Infect Dis","first-page":"437","article-title":"A prospective study of the epidemiology and ecology of Lassa fever","volume":"155","author":"McCormick","year":"1987"},{"issue":"3","key":"b2","series-title":"PLoS Comput Biol","first-page":"e1008811","article-title":"Bridging the gap: Using reservoir ecology and human serosurveys to estimate Lassa virus spillover in West Africa","volume":"17","author":"Basinski","year":"2021"},{"key":"b3","series-title":"Int J Infect Dis","first-page":"767","article-title":"Epidemiological characteristics of Lassa fever cases in Liberia: A retrospective analysis of surveillance data, 2019\u20132020","volume":"122","author":"Jetoh","year":"2022"},{"issue":"3","key":"b4","series-title":"Microorganisms","first-page":"586","article-title":"Space-time trends in Lassa fever in Sierra Leone by 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