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Haemophilus ducreyi was isolated with an enriched chocolate agar containing vancomycin from seven patients with clinical evidence of chancroid. Four cases were imported from outside the United States; the other three cases were acquired in the United States from one of the imported cases. All strains of H. ducreyi contained ampicillin-resistance plasmids with molecular weights of 7.3, 5.7, or 3.6 megadaltons. Plasmid molecular weights were identical for isolates from the epidemiologically linked cases and differed according to the geographic origins of the strains. Findings of this study confirm that H. ducreyi is sexually transmitted and suggest that clinical chancroid develops frequently after acquisition of H. ducreyi.
H H Handsfield, and
P A Totten, and
C L Fennel, and
S Falkow, and
K K Holmes
January 2016,
Emerging infectious diseases,
H H Handsfield, and
P A Totten, and
C L Fennel, and
S Falkow, and
K K Holmes
June 1982,
Antimicrobial agents and chemotherapy,
H H Handsfield, and
P A Totten, and
C L Fennel, and
S Falkow, and
K K Holmes
December 1982,
The Journal of hygiene,
H H Handsfield, and
P A Totten, and
C L Fennel, and
S Falkow, and
K K Holmes
January 1992,
Sexually transmitted diseases,
H H Handsfield, and
P A Totten, and
C L Fennel, and
S Falkow, and
K K Holmes
August 1985,
Antimicrobial agents and chemotherapy,
H H Handsfield, and
P A Totten, and
C L Fennel, and
S Falkow, and
K K Holmes
December 1983,
Lancet (London, England),
H H Handsfield, and
P A Totten, and
C L Fennel, and
S Falkow, and
K K Holmes
January 1993,
International journal of STD & AIDS,
H H Handsfield, and
P A Totten, and
C L Fennel, and
S Falkow, and
K K Holmes
May 1985,
Infection control : IC,
H H Handsfield, and
P A Totten, and
C L Fennel, and
S Falkow, and
K K Holmes
October 1989,
Archives of dermatology,
H H Handsfield, and
P A Totten, and
C L Fennel, and
S Falkow, and
K K Holmes
October 1983,
Lancet (London, England),
