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Berbel D, Càmara J, García E, Tubau F, Guérin F, Giard JC, Domínguez MÁ, Cattoir V, Ardanuy C. A novel genomic island harbouring lsa(E) and lnu(B) genes and a defective prophage in a Streptococcus pyogenes isolate resistant to lincosamide, streptogramin A and pleuromutilin antibiotics. Int J Antimicrob Agents 2019; 54:647-651. [PMID: 31476434 DOI: 10.1016/j.ijantimicag.2019.08.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 06/28/2019] [Accepted: 08/24/2019] [Indexed: 10/26/2022]
Abstract
A lincosamide-resistant and macrolide-susceptible phenotype has not been described to date in Streptococcus pyogenes [group A streptococcus (GAS)]. The aim of this study was to characterize a GAS isolate susceptible to macrolides but resistant to lincosamide, streptogramin A and pleuromutilin antibiotics. Antimicrobial susceptibility was tested using the microdilution broth method and the resistance phenotype was tested by D-test. The GAS2887HUB isolate was subjected to whole-genome sequencing. The isolate showed a positive Gots' test (clindamycin inactivation). Whole-genome sequencing revealed that the strain was ST10 and emm93, and had five resistance genes [lnu(B), ant(6)-Ia, aph(3')-III, tet(M) and dfrG]. The tet(M) gene was located in a Tn916-like transposon. The lsa(E)-lnu(B)-containing sequence (inserted downstream of the rumA gene) was formed by a 39.6-kb prophage, followed by a gene cluster encoding aminoglycoside-streptothricin resistance [ant(6)Ia-sat4-aph(3')III] and lsa(E)-lnu(B) genes. This structure was not transferred by conjugation. This study identified a new genetic element carrying a determinant of lincosamide resistance in a GAS. Further molecular epidemiological surveys are needed to determine the prevalence of this mechanism of resistance in GAS.
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Affiliation(s)
- Dàmaris Berbel
- Microbiology Department, Hospital Universitari de Bellvitge, University of Barcelona, IDIBELL, L'Hospitalet de Llobregat, Barcelona, Spain; CIBER de Enfermedades Respiratorias, ISCIII, Madrid, Spain; Department of Pathology and Experimental Therapeutics, School of Medicine, University of Barcelona, Barcelona, Spain
| | - Jordi Càmara
- Microbiology Department, Hospital Universitari de Bellvitge, University of Barcelona, IDIBELL, L'Hospitalet de Llobregat, Barcelona, Spain; CIBER de Enfermedades Respiratorias, ISCIII, Madrid, Spain; Department of Pathology and Experimental Therapeutics, School of Medicine, University of Barcelona, Barcelona, Spain
| | - Ernesto García
- CIBER de Enfermedades Respiratorias, ISCIII, Madrid, Spain; Centro de Investigaciones Biológicas-CSIC, Madrid, Spain
| | - Fe Tubau
- Microbiology Department, Hospital Universitari de Bellvitge, University of Barcelona, IDIBELL, L'Hospitalet de Llobregat, Barcelona, Spain; CIBER de Enfermedades Respiratorias, ISCIII, Madrid, Spain; Department of Pathology and Experimental Therapeutics, School of Medicine, University of Barcelona, Barcelona, Spain
| | - François Guérin
- CHU de Caen, Service de Microbiologie, Caen, France; Université de Caen Normandie, EA4655 U2RM (Équipe 'Antibio-résistance'), Caen, France
| | - Jean-Christophe Giard
- Université de Caen Normandie, EA4655 U2RM (Équipe 'Antibio-résistance'), Caen, France
| | - M Ángeles Domínguez
- Microbiology Department, Hospital Universitari de Bellvitge, University of Barcelona, IDIBELL, L'Hospitalet de Llobregat, Barcelona, Spain; Department of Pathology and Experimental Therapeutics, School of Medicine, University of Barcelona, Barcelona, Spain
| | - Vincent Cattoir
- CHU de Rennes, Service de Bactériologie-Hygiène hospitalière, Rennes, France; CNR de la Résistance aux Antibiotiques (laboratoire associé 'Entérocoques'), Rennes, France; Université de Rennes 1, Unité Inserm U1230, Rennes, France
| | - Carmen Ardanuy
- Microbiology Department, Hospital Universitari de Bellvitge, University of Barcelona, IDIBELL, L'Hospitalet de Llobregat, Barcelona, Spain; CIBER de Enfermedades Respiratorias, ISCIII, Madrid, Spain; Department of Pathology and Experimental Therapeutics, School of Medicine, University of Barcelona, Barcelona, Spain.
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