{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T18:09:08Z","timestamp":1789668548031,"version":"4.0.1"},"reference-count":198,"publisher":"Public Library of Science (PLoS)","issue":"9","license":[{"start":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T00:00:00Z","timestamp":1789603200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/publicdomain\/zero\/1.0\/"}],"content-domain":{"domain":["www.plosntds.org"],"crossmark-restriction":false},"short-container-title":["PLoS Negl Trop Dis"],"abstract":"<jats:sec id=\"sec001\">\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Viral infections associated with hemorrhagic fevers (VaHFs) cause millions of cases each year across a broad geography with severity ranging from asymptomatic cases to clinical disease with a high case fatality rate. Commonalities in pathophysiology across VaHFs include vascular damage and plasma leakage with the possibility of hemorrhage, organ failure, shock, and death. These changes are seen on autopsy, and evidence of plasma leakage can be readily detected on ultrasound.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sec002\">\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We conducted a systematic review to assess ultrasound findings in VaHFs and their ability to predict severe disease (PROSPERO CRD42024620862). PubMed was searched through May 2025. Any articles presenting original, patient-level findings on ultrasound in VaHFs with serologic and\/or molecular confirmation were included. Case series and duplicative datasets were excluded. A QUADAS-2 tool was used to assess bias. Study level characteristics and patient-level data on the ultrasound findings were extracted. The crude proportions of ultrasound findings were reported, and weighted meta-analysis using a random-effects model was performed and displayed in forest plots when the data allowed. Sensitivity, specificity, and positive\/negative likelihood ratios for severe disease were calculated and visualized using a random effects model in SROC plots when the data allowed.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sec003\">\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>In total, 457 unique publications were screened for inclusion, and 56 publications comprising 6979 participants were included in the review, including 44 publications (6189 participants) on dengue, six (494 participants) on Crimean-Congo hemorrhagic fever, three (134 participants) on hantavirus disease, two (116 participants) on yellow fever, and one (46 participants) on Lassa fever. Participants were most often recruited while acutely sick during periods of high transmission at tertiary care centers. Ultrasound findings included gallbladder wall thickening, ascites, pleural effusions and abnormal lung ultrasound, pericardial effusions, abdominal lymphadenopathy, splenomegaly, abnormal pancreatic ultrasound, and hyperechoic kidneys or liver. Pericardial effusions and several other findings were associated with severe disease.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sec004\">\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Common pathophysiology leading to plasma leakage results in sonographic signs across viral infections associated with hemorrhagic fevers, and some findings can help predict severe disease. Important limitations included reliance on a single database and possibility of missing manuscripts from local journals, the small number of publications on non-dengue VaHFs, patient recruitment overwhelmingly from the in-hospital setting at tertiary referral centers during high-transmission periods, high degree of heterogeneity, and bias in the timing domain among the studies on dengue. We first propose ultrasound findings be incorporated into new definitions of severity for VaHFs and then introduce an Ultrasound-based assessment of Plasma leakage Severity (UPS) as a hypothesis generating framework to help guide future, prospective research. We discuss some virus and organ-specific considerations and conclude with detailed considerations for future research.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1371\/journal.pntd.0014609","type":"journal-article","created":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T17:39:48Z","timestamp":1789666788000},"page":"e0014609","update-policy":"https:\/\/doi.org\/10.1371\/journal.pntd.corrections_policy","source":"Crossref","is-referenced-by-count":0,"title":["A systematic review of ultrasound to predict severe disease in patients with dengue and other viral infections associated with hemorrhagic fevers"],"prefix":"10.1371","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4801-0147","authenticated-orcid":true,"given":"Daniel Z.","family":"Hodson","sequence":"first","affiliation":[{"name":"David Geffen School of Medicine at the University of California (Los Angeles)","place":["Los Angeles, United States of America"],"department":["Division of Internal Medicine \u2013 Pediatrics"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Renato A.","family":"Tambelli","sequence":"additional","affiliation":[{"name":"Hospital das Cl\u00ednicas da Faculdade de Medicina de Mar\u00edlia","place":["S\u00e3o Paulo, Brazil"],"department":["Department of Emergency Medicine"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mahathar A.","family":"Wahab","sequence":"additional","affiliation":[{"name":"Hospital Kuala Lumpur","place":["Kuala Lumpur, Malaysia"],"department":["Emergency and Trauma Department"]},{"name":"Ministry of Health","place":["Putrajaya, Malaysia"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Claudia","family":"Wallrauch","sequence":"additional","affiliation":[{"name":"Lighthouse Clinic Trust","place":["Lilongwe, Malawi"]},{"name":"Institute of Infectious Diseases and Tropical Medicine, LMU University Hospital","place":["Munich, Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hans-Michael","family":"Steffen","sequence":"additional","affiliation":[{"name":"University Hospital Cologne, University of Cologne","place":["Cologne, Germany"],"department":["Department of Gastroenterology and Hepatology, Faculty of Medicine"]},{"name":"Hypertension Center, Faculty of Medicine, University Hospital Cologne, University of Cologne","place":["Cologne, Germany"]},{"name":"Chreso University","place":["Lusaka, Zambia"],"department":["Department of Postgraduate Studies and Research"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Benno","family":"Kreuels","sequence":"additional","affiliation":[{"name":"University Medical Centre Hamburg-Eppendorf","place":["Hamburg, Germany"],"department":["Division for Tropical Medicine, Department of Medicine"]},{"name":"Research Group Neglected Diseases and Envenoming, Section for Implementation Research, Bernhard Nocht Institute for Tropical Medicine","place":["Hamburg, Germany"]},{"name":"School of Medicine, Kamuzu University of Health Sciences","place":["Blantyre, Malawi"],"department":["Department of Medicine"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sabine","family":"B\u00e9lard","sequence":"additional","affiliation":[{"name":"Institute of Tropical Medicine, University of T\u00fcbingen","place":["T\u00fcbingen, Germany"]},{"name":"German Center for Infectious Disease Research, DZIF Partner Site T\u00fcbingen","place":["T\u00fcbingen, Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tom","family":"Heller","sequence":"additional","affiliation":[{"name":"Lighthouse Clinic Trust","place":["Lilongwe, Malawi"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"340","published-online":{"date-parts":[[2026,9,17]]},"reference":[{"issue":"10","key":"pntd.0014609.ref001","doi-asserted-by":"crossref","DOI":"10.1371\/journal.pntd.0010889","article-title":"The number of cases, mortality and treatments of viral hemorrhagic fevers: a systematic review","volume":"16","author":"D Belhadi","year":"2022","journal-title":"PLoS Negl Trop Dis"},{"key":"pntd.0014609.ref002","doi-asserted-by":"crossref","first-page":"411","DOI":"10.1146\/annurev-pathol-020712-164041","article-title":"Pathogenesis of the viral hemorrhagic fevers","volume":"8","author":"S Paessler","year":"2013","journal-title":"Annu Rev Pathol"},{"key":"pntd.0014609.ref003","volume-title":"World Health Organization Regional Office for South-East Asia. 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