2026-06-14T10:38:29Zhttps://repisalud.isciii.es/rest/oai/requestoai:repisalud.isciii.es:20.500.12105/85192024-09-27T22:50:11Zcom_20.500.12105_2052com_20.500.12105_2051col_20.500.12105_19609
Repisalud
author
Balsalobre-Arenas, Maria Luz
author
Hernández-Madrid, Antonia
author
Llull, Daniel
author
Martin-Galiano, Antonio Javier
author
García, Ernesto
author
Fenoll, Asuncion
author
de la Campa, Adela G
funder
Instituto de Salud Carlos III
funder
NIH - National Institute of Dental and Craniofacial Research (NIDCR) (Estados Unidos)
2019-10-22T10:10:15Z
2019-10-22T10:10:15Z
2006-11
J Clin Microbiol. 2006 Nov;44(11):4163-71. Epub 2006 Sep 13.
10.1128/JCM.01137-06
0095-1137
Journal of clinical microbiology
16971639
http://hdl.handle.net/20.500.12105/8519
Eight optochin-susceptible (Opt(s)) alpha-hemolytic (viridans) streptococcus isolates were characterized at the molecular level. These isolates showed phenotypic characteristics typical of both viridans streptococci and Streptococcus pneumoniae. Comparison of the sequence of housekeeping genes from these isolates with those of S. pneumoniae, Streptococcus mitis, Streptococcus oralis, and Streptococcus pseudopneumoniae suggested that the Opt(s) isolates corresponded to streptococci of the mitis group. Besides, the Opt(s) streptococci were negative by a Gen-Probe AccuProbe pneumococcus test and hybridized with specific pneumococcal probes (lytA and ply) but also with ant, a gene not present in most S. pneumoniae strains. Moreover, the isolates were insoluble in 1% sodium deoxycholate but completely dissolved in 0.1% deoxycholate. Sequence analysis of the lytA gene revealed that the Opt(s) streptococci carried lytA alleles characteristic of those present in nonpneumococcal streptococci of the mitis group. The determination of the partial nucleotide sequence embracing the atp operon encoding the F(o)F(1) H(+)-ATPase indicated that the optochin susceptibility of the isolates was due to the acquisition of atpC, atpA, and part of atpB from S. pneumoniae by horizontal gene transfer.
eng
Molecular characterization of disease-associated streptococci of the mitis group that are optochin susceptible
journal article
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