?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Sharma%2C+C&rft.aulast=Sharma&rft.aufirst=C&rft.issue=3&rft.volume=36&rft.date=March+1998&rft.issn=0095-1137&rft.atitle=Molecular+evidence+that+a+distinct+Vibrio+cholerae+O1+biotype+El+Tor+strain+in+Calcutta+may+have+spread+to+the+African+continent.&rft.title=Journal+of+clinical+microbiology&rft.pages=843-4&rft.genre=article