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Capsular transformation of a multidrug-resistant Streptococcus pneumoniae in vivo.
Nesin M, Ramirez M, Tomasz A. Nesin M, et al. Among authors: tomasz a. J Infect Dis. 1998 Mar;177(3):707-13. doi: 10.1086/514242. J Infect Dis. 1998. PMID: 9498451
Several multidrug-resistant (MDR) isolates of Streptococcus pneumoniae recovered from a variety of clinical sources and expressing serotypes 9N, 14, 19F, and 3 could not be distinguished from the capsular type 23 Spanish/USA epidemic clone in antibiotype, pulsed-field gel …
Several multidrug-resistant (MDR) isolates of Streptococcus pneumoniae recovered from a variety of clinical sources and expressing se …
Alterations in penicillin-binding proteins of clinical and laboratory isolates of pathogenic Streptococcus pneumoniae with low levels of penicillin resistance.
Handwerger S, Tomasz A. Handwerger S, et al. Among authors: tomasz a. J Infect Dis. 1986 Jan;153(1):83-9. doi: 10.1093/infdis/153.1.83. J Infect Dis. 1986. PMID: 3941290
Several recent surveys of clinical isolates have indicated that substantial fractions of naturally occurring populations of Streptococcus pneumoniae have undergone a distinct upward move in the required minimal inhibitory concentration (MIC) of benzylpenicillin (from a
Several recent surveys of clinical isolates have indicated that substantial fractions of naturally occurring populations of Streptococcus pn …
Horizontal transfer of penicillin-binding protein genes in penicillin-resistant clinical isolates of Streptococcus pneumoniae.
Dowson CG, Hutchison A, Brannigan JA, George RC, Hansman D, Liñares J, Tomasz A, Smith JM, Spratt BG. Dowson CG, et al. Among authors: tomasz a. Proc Natl Acad Sci U S A. 1989 Nov;86(22):8842-6. doi: 10.1073/pnas.86.22.8842. Proc Natl Acad Sci U S A. 1989. PMID: 2813426 Free PMC article.
In contrast the PBP2B genes of the penicillin-resistant strains show approximately equal to 14% sequence divergence from those of the penicillin-sensitive strains and the development of penicillin resistance has involved the replacement, presumably by transformation, of the origi …
In contrast the PBP2B genes of the penicillin-resistant strains show approximately equal to 14% sequence divergence from those of the penici …
Peptidoglycan composition of a highly methicillin-resistant Staphylococcus aureus strain. The role of penicillin binding protein 2A.
de Jonge BL, Chang YS, Gage D, Tomasz A. de Jonge BL, et al. Among authors: tomasz a. J Biol Chem. 1992 Jun 5;267(16):11248-54. J Biol Chem. 1992. PMID: 1597460
This extra PBP is thought to be a transpeptidase essential for the continued cell wall synthesis and growth in the presence of beta-lactam antibiotics. ...Our experiments provided no experimental data for a unique transpeptidase activity associated with PBP2A....
This extra PBP is thought to be a transpeptidase essential for the continued cell wall synthesis and growth in the presence of beta-l …
Abnormal physiological properties and altered cell wall composition in Streptococcus pneumoniae grown in the presence of clavulanic acid.
Severin A, Severina E, Tomasz A. Severin A, et al. Among authors: tomasz a. Antimicrob Agents Chemother. 1997 Mar;41(3):504-10. doi: 10.1128/AAC.41.3.504. Antimicrob Agents Chemother. 1997. PMID: 9055983 Free PMC article.
Multiple changes of penicillin-binding proteins in penicillin-resistant clinical isolates of Streptococcus pneumoniae.
Hakenbeck R, Tarpay M, Tomasz A. Hakenbeck R, et al. Among authors: tomasz a. Antimicrob Agents Chemother. 1980 Mar;17(3):364-71. doi: 10.1128/aac.17.3.364. Antimicrob Agents Chemother. 1980. PMID: 7425601 Free PMC article.
Penicillin-binding proteins of multiply antibiotic-resistant South African strains of Streptococcus pneumoniae.
Zighelboim S, Tomasz A. Zighelboim S, et al. Among authors: tomasz a. Antimicrob Agents Chemother. 1980 Mar;17(3):434-42. doi: 10.1128/aac.17.3.434. Antimicrob Agents Chemother. 1980. PMID: 6903436 Free PMC article.
Multiply drug-resistant South African pneumococci (with penicillin minimal inhibitory concentrations ranging from 0.2 to 12.5 microgram/ml) showed several types of major alterations in their penicillin-binding protein (PBP) pattern compared with that of a penicillin-suscep …
Multiply drug-resistant South African pneumococci (with penicillin minimal inhibitory concentrations ranging from 0.2 to 12.5 microgram/ml) …
Two bactericidal targets for penicillin in pneumococci: autolysis-dependent and autolysis-independent killing mechanisms.
Moreillon P, Markiewicz Z, Nachman S, Tomasz A. Moreillon P, et al. Among authors: tomasz a. Antimicrob Agents Chemother. 1990 Jan;34(1):33-9. doi: 10.1128/aac.34.1.33. Antimicrob Agents Chemother. 1990. PMID: 1691615 Free PMC article.
(ii) Mutants from which the amidase was completely eliminated by plasmid insertion or deletion (Lyt-) were still killed, albeit at a slower rate than the wild-type Lyt+ strains (3 to 4 log units instead of 4 to 5 log units per 6 h, i.e., about 1 log unit slower than the wi …
(ii) Mutants from which the amidase was completely eliminated by plasmid insertion or deletion (Lyt-) were still killed, albeit at a
A pneumococcal clinical isolate with high-level resistance to cefotaxime and ceftriaxone.
Figueiredo AM, Connor JD, Severin A, Vaz Pato MV, Tomasz A. Figueiredo AM, et al. Among authors: tomasz a. Antimicrob Agents Chemother. 1992 Apr;36(4):886-9. doi: 10.1128/aac.36.4.886. Antimicrob Agents Chemother. 1992. PMID: 1503454 Free PMC article.
A beta-lactam-resistant serotype 23F Streptococcus pneumoniae clinical isolate from the cerebrospinal fluid of a pediatric patient from California is unusual in that the MICs of cefotaxime and ceftriaxone (2.5 micrograms/ml each) are higher than that of benzylpenici
A beta-lactam-resistant serotype 23F Streptococcus pneumoniae clinical isolate from the cerebrospinal fluid of a pediatric pat
Antibiotic tolerance among clinical isolates of bacteria.
Handwerger S, Tomasz A. Handwerger S, et al. Among authors: tomasz a. Rev Infect Dis. 1985 May-Jun;7(3):368-86. doi: 10.1093/clinids/7.3.368. Rev Infect Dis. 1985. PMID: 3895353 Review. No abstract available.
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