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Staphylococcus aureus nasal carriage, virulence traits, antibiotic resistance mechanisms, and genetic lineages in healthy humans in Spain, with detection of CC398 and CC97 strains.
Int J Med Microbiol. 2011 Aug; 301(6):500-5.IJ

Abstract

S. aureus nasal carriage was investigated in 278 healthy humans, determining the antibiotic resistance mechanisms, virulence traits, and genetic lineages of recovered isolates. Nasal samples were cultured in specific media for S. aureus and methicillin-resistant S. aureus (MRSA) recovery. S. aureus was detected in 53 of 278 nasal samples (19.1%): MRSA was found in one sample (0.4%) and methicillin-susceptible S. aureus (MSSA) in the remaining 52 samples. The MRSA isolate was typed as ST1649-t701-agrI-SCCmec-IVc and only exhibited resistance to beta-lactams. A high diversity of spa types (n=37) was identified among the 52 MSSA, identifying 5 new spa-types. Multi-locus sequence typing (MLST) typing was performed in 30 selected MSSA, detecting 16 different sequence types, 2 of them being new. MSSA strains presented agr types I (30.2%), II (30.2%), III (34%), and IV (5.6%). Eleven strains showed erythromycin resistance and harbored different combinations of erm(A), erm(B), erm(C), erm(T), and msr(A) genes. Two strains exhibited ciprofloxacin resistance, and one of them presented amino acid changes in GyrA and GrlA proteins. The presence of 28 genes encoding staphylococcal toxins was investigated by PCR in all 53 S. aureus isolates. The toxic shock syndrome toxin 1 (TSST-1) gene was detected in 15 MSSA isolates (11 of them typed within the clonal complex CC30) and the gene of exfoliative toxin A in 2 strains. Different combinations of enterotoxin genes were identified among S. aureus strains. None of the S. aureus isolates harbored the Panton-Valentine leukocidin gene. Two MSSA presented the sequence-type ST398 [harboring erm(T) gene], and 2 additional isolates were typed as ST97. Interestingly, MSSA CC398 and CC97 isolates were detected. These clonal complexes are associated with food-producing animals.

Authors+Show Affiliations

Area Bioquímica y Biología Molecular, Universidad de La Rioja, Madre de Dios 51, 26006 Logrono, Spain.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21570348

Citation

Lozano, Carmen, et al. "Staphylococcus Aureus Nasal Carriage, Virulence Traits, Antibiotic Resistance Mechanisms, and Genetic Lineages in Healthy Humans in Spain, With Detection of CC398 and CC97 Strains." International Journal of Medical Microbiology : IJMM, vol. 301, no. 6, 2011, pp. 500-5.
Lozano C, Gómez-Sanz E, Benito D, et al. Staphylococcus aureus nasal carriage, virulence traits, antibiotic resistance mechanisms, and genetic lineages in healthy humans in Spain, with detection of CC398 and CC97 strains. Int J Med Microbiol. 2011;301(6):500-5.
Lozano, C., Gómez-Sanz, E., Benito, D., Aspiroz, C., Zarazaga, M., & Torres, C. (2011). Staphylococcus aureus nasal carriage, virulence traits, antibiotic resistance mechanisms, and genetic lineages in healthy humans in Spain, with detection of CC398 and CC97 strains. International Journal of Medical Microbiology : IJMM, 301(6), 500-5. https://doi.org/10.1016/j.ijmm.2011.02.004
Lozano C, et al. Staphylococcus Aureus Nasal Carriage, Virulence Traits, Antibiotic Resistance Mechanisms, and Genetic Lineages in Healthy Humans in Spain, With Detection of CC398 and CC97 Strains. Int J Med Microbiol. 2011;301(6):500-5. PubMed PMID: 21570348.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Staphylococcus aureus nasal carriage, virulence traits, antibiotic resistance mechanisms, and genetic lineages in healthy humans in Spain, with detection of CC398 and CC97 strains. AU - Lozano,Carmen, AU - Gómez-Sanz,Elena, AU - Benito,Daniel, AU - Aspiroz,Carmen, AU - Zarazaga,Myriam, AU - Torres,Carmen, Y1 - 2011/05/12/ PY - 2010/09/16/received PY - 2010/12/22/revised PY - 2011/02/22/accepted PY - 2011/5/17/entrez PY - 2011/5/17/pubmed PY - 2011/12/13/medline SP - 500 EP - 5 JF - International journal of medical microbiology : IJMM JO - Int J Med Microbiol VL - 301 IS - 6 N2 - S. aureus nasal carriage was investigated in 278 healthy humans, determining the antibiotic resistance mechanisms, virulence traits, and genetic lineages of recovered isolates. Nasal samples were cultured in specific media for S. aureus and methicillin-resistant S. aureus (MRSA) recovery. S. aureus was detected in 53 of 278 nasal samples (19.1%): MRSA was found in one sample (0.4%) and methicillin-susceptible S. aureus (MSSA) in the remaining 52 samples. The MRSA isolate was typed as ST1649-t701-agrI-SCCmec-IVc and only exhibited resistance to beta-lactams. A high diversity of spa types (n=37) was identified among the 52 MSSA, identifying 5 new spa-types. Multi-locus sequence typing (MLST) typing was performed in 30 selected MSSA, detecting 16 different sequence types, 2 of them being new. MSSA strains presented agr types I (30.2%), II (30.2%), III (34%), and IV (5.6%). Eleven strains showed erythromycin resistance and harbored different combinations of erm(A), erm(B), erm(C), erm(T), and msr(A) genes. Two strains exhibited ciprofloxacin resistance, and one of them presented amino acid changes in GyrA and GrlA proteins. The presence of 28 genes encoding staphylococcal toxins was investigated by PCR in all 53 S. aureus isolates. The toxic shock syndrome toxin 1 (TSST-1) gene was detected in 15 MSSA isolates (11 of them typed within the clonal complex CC30) and the gene of exfoliative toxin A in 2 strains. Different combinations of enterotoxin genes were identified among S. aureus strains. None of the S. aureus isolates harbored the Panton-Valentine leukocidin gene. Two MSSA presented the sequence-type ST398 [harboring erm(T) gene], and 2 additional isolates were typed as ST97. Interestingly, MSSA CC398 and CC97 isolates were detected. These clonal complexes are associated with food-producing animals. SN - 1618-0607 UR - https://www.unboundmedicine.com/medline/citation/21570348/Staphylococcus_aureus_nasal_carriage_virulence_traits_antibiotic_resistance_mechanisms_and_genetic_lineages_in_healthy_humans_in_Spain_with_detection_of_CC398_and_CC97_strains_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1438-4221(11)00035-X DB - PRIME DP - Unbound Medicine ER -