{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,2]],"date-time":"2026-10-02T02:55:49Z","timestamp":1790909749105,"version":"4.1.0"},"reference-count":13,"publisher":"American Association for the Advancement of Science (AAAS)","issue":"3703","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Science"],"published-print":{"date-parts":[[1965,12,17]]},"abstract":"<jats:p>\n            Machupo virus, the etiologic agent of human hemorrhagic fever in Bolivia, induced chronic asymptomatic infection in laboratory hamsters and colonized individuals of the peridomestic, wild, South American rodent,\n            <jats:italic>Calomys callosus<\/jats:italic>\n            . Viruria was detected for more than 500 and 150 days, respectively, in the two species. Chronic viremia was shown only for\n            <jats:italic>Calomys<\/jats:italic>\n            . Virus-neutralizing substances were present in parenterally infected adult animals, but not in animals born to, and in contact with, an infected female. Chronic infection in wild rodents may be an important mechanism in the natural history of Machupo and related virus infections.\n          <\/jats:p>","DOI":"10.1126\/science.150.3703.1618","type":"journal-article","created":{"date-parts":[[2006,10,5]],"date-time":"2006-10-05T10:04:55Z","timestamp":1160042695000},"page":"1618-1619","source":"Crossref","is-referenced-by-count":45,"title":["Chronic Infection of Rodents by Machupo Virus"],"prefix":"10.1126","volume":"150","author":[{"given":"K. M.","family":"Johnson","sequence":"first","affiliation":[{"name":"Middle American Research Unit, National Institutes of Health, Balboa Heights, Canal Zone"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"R. B.","family":"Mackenzie","sequence":"additional","affiliation":[{"name":"Middle American Research Unit, National Institutes of Health, Balboa Heights, Canal Zone"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P. A.","family":"Webb","sequence":"additional","affiliation":[{"name":"Middle American Research Unit, National Institutes of Health, Balboa Heights, Canal Zone"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M. 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