Resistance factor-mediated spectinomycin resistance.
Of 100 natural isolates of drug-resistant enteric bacteria, 51 were resistant to spectinomycin (Spc) and 46 contained transferable R factors mediating Spc resistance. All Spc(R) R factors mediated streptomycin and bluensomycin resistance and were fi(+) type. Extracts of R-Spc(R) strains adenylated Spc, dihydrospectinomycin, actinamine, streptomycin, and bluensomycin in vitro in the presence of adenosine triphosphate and Mg(++). Results of genetic and biochemical studies support the hypothesis that these reactions are mediated by a single enzyme.
Smith
D H
DH
Department of Pediatrics, Harvard Medical School and Children's Hospital Medical Center, Boston, Massachusetts 02115.
Janjigian
J A
JA
Prescott
N
N
Anderson
P W
PW