{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,11]],"date-time":"2026-05-11T13:54:48Z","timestamp":1778507688580,"version":"3.51.4"},"reference-count":28,"publisher":"American Association for the Advancement of Science (AAAS)","issue":"4084","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Science"],"published-print":{"date-parts":[[1973,4,27]]},"abstract":"<jats:p>\n            There is a small but distinct difference in DNA base composition between the typhus and spotted fever groups of rickettsiae. The molar percentages of guanine plus cytosine for\n            <jats:italic>Rickettsia prowazeki<\/jats:italic>\n            ,\n            <jats:italic>R. typhi<\/jats:italic>\n            , and\n            <jats:italic>R. canada<\/jats:italic>\n            are approximately 30, for\n            <jats:italic>R. rickettsi<\/jats:italic>\n            ,\n            <jats:italic>R. conori<\/jats:italic>\n            , and\n            <jats:italic>R. akari<\/jats:italic>\n            they are about 32.5. The percentage for trench fever rickettsia,\n            <jats:italic>Rochalimaea quintana<\/jats:italic>\n            , is 38.6.\n          <\/jats:p>","DOI":"10.1126\/science.180.4084.415","type":"journal-article","created":{"date-parts":[[2006,10,5]],"date-time":"2006-10-05T14:05:45Z","timestamp":1160057145000},"page":"415-417","source":"Crossref","is-referenced-by-count":47,"title":["DNA Base Composition of Rickettsiae"],"prefix":"10.1126","volume":"180","author":[{"suffix":"Jr.","given":"Franklin J.","family":"Tyeryar","sequence":"first","affiliation":[{"name":"Naval Medical Research Institute, Bethesda, Maryland 20014"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Emilio","family":"Weiss","sequence":"additional","affiliation":[{"name":"Naval Medical Research Institute, Bethesda, Maryland 20014"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"David B.","family":"Millar","sequence":"additional","affiliation":[{"name":"Naval Medical Research Institute, Bethesda, Maryland 20014"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"F. 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