Characterization of Staphylococcus aureus strains isolated from faeces of healthy neonates and potential mother-to-infant microbial transmission through breastfeeding

FEMS Microbiology Ecology
Daniel BenitoCarmen Torres

Abstract

Twenty-one women and their respective singleton infants participated in this study, contributing with samples of breast milk and faeces (at days 7, 14 and 35 after birth), respectively, used for Staphylococcus aureus recovery. The aim was to track the carriage of S. aureus in milk and infant faeces of mother-infant pairs, and to determine the genetic lineages of the isolates, their potential clonal relationships and their content in antimicrobial resistance, virulence and immune evasion cluster genes. The molecular characterization was performed by PCR and sequencing. Clonal relationship among mother-infant isolates was conducted by spa typing, multilocus sequence typing (MLST), and pulsed-field gel electrophoresis (PFGE). Staphylococcus aureus was isolated from milk samples of 6 of 21 mothers (16 isolates) and from faecal samples of 12 of 21 infants (25 isolates). From these 41 S. aureus recovered, 18 were methicillin-resistant (MRSA) and 23 methicillin-susceptible (MSSA). Twelve diferentes spa types and eight sequence types were detected among S. aureus. Predominant clonal complexes were CC5 (43.9%) and CC30 (36.6%). MRSA strains presented a multidrug-resistance profile, 65.2% of MSSA strains harboured tsst-1 toxin gene and 2...Continue Reading

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Citations

Aug 20, 2015·Journal of Developmental Origins of Health and Disease·R Cabrera-RubioM C Collado
Jun 1, 2016·Frontiers in Microbiology·Shantelle Claassen-WeitzMamadou Kaba
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Jul 23, 2021·Genes & Diseases·Jilei ZhangJun Sun
Jul 15, 2021·FEMS Microbiology Reviews·Elisa J M RaineriJan Maarten van Dijl

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