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. 1979 Oct;114(2):491-4.
doi: 10.1099/00221287-114-2-491.

The ecology of gonococcal plasmids

M Roberts, P Piot, S Falkow

The ecology of gonococcal plasmids

M Roberts et al. J Gen Microbiol. 1979 Oct.

Abstract

Of 261 strains of Neisseria gonorrhoeae examined for plasmids, 6 were plasmid-free, 217 contained only a small multicopy 2.6 X 10(6) dalton plasmid and 38 carried a large 24.5 X 10(6) dalton plasmid. Restriction enzyme digests and DNA-DNA hybridization studies revealed that the large plasmids isolated between 1940 and 1978 share a common core of DNA sequences (70 to 100%) and represent a group of closely related molecules.

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