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Additional file 1.

Strains were isolated from urines clinical samples from patients from various service units of University Hospital complex Paediatric Charles De Gaulle (CHUP-CDG) in Burkina Faso. These strains were resistant to at least one oxyimino-cephalosporin. They were identified as producer of extended spectrum β-lactamases (ESBL) by double-disk synergy test between amoxicillin?clavulanate and cefotaxime, ceftriaxone or ceftazidime and by kinetic methods. Crude extract from these isolates showed a broad-substrate profile by hydrolyzing cefuroxime, cefotaxime, ceftriaxone and with a lower degree to cetazidime and cefepime but not imipinem. Sequencing of PCR products amplified with primers designed for blaSHV genes showed that these genes coded for SHV-11, SHV-12, SHV-28, SHV-32, SHV-38, SHV-76 and SHV-99. This is the first description of these enzymes in Burkina Faso.

Seventeen oxyimino-cephalosporins-resistant Klebsiella strains were isoleted from urines clinical samples from patients from various service units of University Hospital complex Paediatric Charles De Gaulle (CHUP-CDG) in Burkina Faso. These strains were resistant to at least one oxyimino-cephalosporin. They were identified as producer of extended spectrum β-lactamases (ESBL) by double-disk synergy test between amoxicillin–clavulanate and cefotaxime, ceftriaxone or ceftazidime. The ESBL was identified as CTX-M-15 for the 17 strains by sequencing of PCR products amplified with primers designed for blaCTX-M genes. This is the first description of this enzyme in Burkina Faso.