{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,23]],"date-time":"2026-10-23T06:12:53Z","timestamp":1792735973341,"version":"4.5.0"},"reference-count":92,"publisher":"Public Library of Science (PLoS)","issue":"9","license":[{"start":{"date-parts":[[2021,9,16]],"date-time":"2021-09-16T00:00:00Z","timestamp":1631750400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","award":["DP5OD023065"],"award-info":[{"award-number":["DP5OD023065"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","award":["T32 OD011089"],"award-info":[{"award-number":["T32 OD011089"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["www.plospathogens.org"],"crossmark-restriction":false},"short-container-title":["PLoS Pathog"],"abstract":"<jats:p><jats:italic>Trypanosoma brucei<\/jats:italic> is a protozoan parasite that causes human and animal African trypanosomiases (HAT and AAT). In the mammalian host, the parasite lives entirely extracellularly, in both the blood and interstitial spaces in tissues. Although most <jats:italic>T<\/jats:italic>. <jats:italic>brucei<\/jats:italic> research has focused on the biology of blood- and central nervous system (CNS)-resident parasites, a number of recent studies have highlighted parasite reservoirs in the dermis and adipose tissue, leading to a renewed interest in tissue-resident parasite populations. In light of this renewed interest, work describing tissue-resident parasites can serve as a valuable resource to inform future investigations of tissue-resident <jats:italic>T<\/jats:italic>. <jats:italic>brucei<\/jats:italic>. Here, we review this body of literature, which describes infections in humans, natural hosts, and experimental animal models, providing a wealth of information on the distribution and biology of extravascular parasites, the corresponding immune response in each tissue, and resulting host pathology. We discuss the implications of these studies and future questions in the study of extravascular <jats:italic>T<\/jats:italic>. <jats:italic>brucei<\/jats:italic>.<\/jats:p>","DOI":"10.1371\/journal.ppat.1009866","type":"journal-article","created":{"date-parts":[[2021,9,16]],"date-time":"2021-09-16T17:24:09Z","timestamp":1631813049000},"page":"e1009866","update-policy":"https:\/\/doi.org\/10.1371\/journal.ppat.corrections_policy","source":"Crossref","is-referenced-by-count":52,"title":["Thinking outside the blood: Perspectives on tissue-resident Trypanosoma brucei"],"prefix":"10.1371","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1626-2809","authenticated-orcid":true,"given":"Nathan P.","family":"Crilly","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1535-2530","authenticated-orcid":true,"given":"Monica R.","family":"Mugnier","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"340","published-online":{"date-parts":[[2021,9,16]]},"reference":[{"issue":"2","key":"ppat.1009866.ref001","doi-asserted-by":"crossref","first-page":"e961","DOI":"10.1371\/journal.pntd.0000961","article-title":"Phylogeography and taxonomy of Trypanosoma brucei.","volume":"5","author":"O Balmer","year":"2011","journal-title":"PLoS Negl Trop Dis"},{"key":"ppat.1009866.ref002","first-page":"257","article-title":"Epidemiology of human African trypanosomiasis.","volume":"6","author":"JR Franco","year":"2014","journal-title":"Clin Epidemiol."},{"key":"ppat.1009866.ref003","doi-asserted-by":"crossref","first-page":"39","DOI":"10.3389\/fimmu.2019.00039","article-title":"Clinical and Neuropathogenetic Aspects of Human African Trypanosomiasis.","volume":"10","author":"PGE Kennedy","year":"2019","journal-title":"Front Immunol."},{"issue":"7","key":"ppat.1009866.ref004","doi-asserted-by":"crossref","first-page":"986","DOI":"10.1111\/j.1469-0691.2011.03536.x","article-title":"Sleeping sickness.","volume":"17","author":"D Malvy","year":"2011","journal-title":"Clin Microbiol Infect"},{"key":"ppat.1009866.ref005","volume-title":"field guide for the diagnosis, treatment, and prevention of African Animal Trypanosomiasis","author":"G. 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