{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,11]],"date-time":"2025-11-11T13:00:27Z","timestamp":1762866027301},"reference-count":0,"publisher":"American Society for Microbiology","issue":"3","license":[{"start":{"date-parts":[[1974,3,1]],"date-time":"1974-03-01T00:00:00Z","timestamp":131328000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.asm.org\/non-commercial-tdm-license"}],"content-domain":{"domain":["journals.asm.org"],"crossmark-restriction":true},"short-container-title":["Antimicrob Agents Chemother"],"published-print":{"date-parts":[[1974,3]]},"abstract":"<jats:p>\n            All 17\n            <jats:italic>Salmonella typhi<\/jats:italic>\n            strains tested from the epidemic in Mexico carried R factors of compatibility group H, conferring resistance to chloramphenicol, streptomycin, tetracycline, and sulfonamides. Some\n            <jats:italic>S. typhi<\/jats:italic>\n            strains carried, in addition, non-conjugative, ampicillin resistance plasmids and R factors of the I or A\u2013C complex. All 20\n            <jats:italic>Shigella dysenteriae<\/jats:italic>\n            1 strains tested of epidemic origin carried O-group R factors. Ampicillin resistance in\n            <jats:italic>S. dysenteriae<\/jats:italic>\n            1 was not proved to be plasmid borne. R factors of group H were not identified in any of the tested Mexican isolates other than\n            <jats:italic>S. typhi<\/jats:italic>\n            , but R factors of group O were identified in\n            <jats:italic>Escherichia coli, Shigella flexneri<\/jats:italic>\n            , and one strain of\n            <jats:italic>S. typhi<\/jats:italic>\n            , as well as in the epidemic\n            <jats:italic>S. dysenteriae<\/jats:italic>\n            . An R factor was identified which seemed to have two compatibility specificities, groups I\u03c9 and O.\n          <\/jats:p>","DOI":"10.1128\/aac.5.3.310","type":"journal-article","created":{"date-parts":[[2012,6,27]],"date-time":"2012-06-27T23:57:02Z","timestamp":1340841422000},"page":"310-317","update-policy":"http:\/\/dx.doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":55,"title":["R Factors in Strains of\n            <i>Salmonella typhi<\/i>\n            and\n            <i>Shigella dysenteriae<\/i>\n            1 Isolated During Epidemics in Mexico: Classification by Compatibility"],"prefix":"10.1128","volume":"5","author":[{"given":"Naomi","family":"Datta","sequence":"first","affiliation":[{"name":"Royal Postgraduate Medical School, London W.12, England, and Hospital Infantil de Mexico, Mexico City 7, D.F., Mexico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J.","family":"Olarte","sequence":"additional","affiliation":[{"name":"Royal Postgraduate Medical School, London W.12, England, and Hospital Infantil de Mexico, Mexico City 7, D.F., Mexico"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"235","container-title":["Antimicrobial Agents and Chemotherapy"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.asm.org\/doi\/pdf\/10.1128\/AAC.5.3.310","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.asm.org\/doi\/pdf\/10.1128\/AAC.5.3.310","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2022,2,21]],"date-time":"2022-02-21T13:54:13Z","timestamp":1645451653000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.asm.org\/doi\/10.1128\/AAC.5.3.310"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1974,3]]},"references-count":0,"journal-issue":{"issue":"3","published-print":{"date-parts":[[1974,3]]}},"alternative-id":["10.1128\/AAC.5.3.310"],"URL":"https:\/\/doi.org\/10.1128\/aac.5.3.310","relation":{},"ISSN":["0066-4804","1098-6596"],"issn-type":[{"value":"0066-4804","type":"print"},{"value":"1098-6596","type":"electronic"}],"subject":[],"published":{"date-parts":[[1974,3]]},"assertion":[{"value":"1974-03-01","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}