Related Experiment Video
Updated: May 31, 2026

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)
Published on: February 9, 2011
Breastfeeding and mucosal and cutaneous colonization by Staphylococcus aureus in atopic children
Raissa Massaia Londero Chemello1, Elsa Regina Justo Giugliani, Renan Rangel Bonamigo
1Sanitary Dermatology Outpatient Clinic of Porto Alegre (ADS - RS) and Central Laboratory of Public Health of Rio Grande do Sul (LACEN - RS) - Porto Alegre (RS), Brazil. raissalondero@gmail.com
Insights
Breastfeeding did not show a link to Staphylococcus aureus (S. aureus) colonization in infants with atopic dermatitis. Further research confirmed no association between breastfeeding and S. aureus presence in atopic children.
Area of Science:
- Pediatric dermatology
- Microbiology
- Immunology
Background:
- Atopic dermatitis (AD) development is complex, with controversial findings regarding breastfeeding's role.
- The impact of Staphylococcus aureus (S. aureus) colonization via breastfeeding on AD pathogenesis remains unclear.
Purpose of the Study:
- To investigate the association between breastfeeding and S. aureus colonization in infants diagnosed with atopic dermatitis.
- To explore the relationship between maternal and infant S. aureus carriage.
Main Methods:
- A transversal study involving atopic patients (4-24 months) and their mothers.
- Collection of nasal and skin swabs from infants, and nasal swabs from mothers.
- Univariate analysis using chi-square and Fischer Exact's tests to assess associations.
Main Results:
- No significant association was found between breastfeeding and S. aureus colonization in infants' nares or skin.
- S. aureus was isolated from 25.8% of breastfed infants' nares and 20.8% of non-breastfed infants' nares.
- A high concordance (77.8%) in S. aureus carriage was observed between mothers and infants.
Conclusions:
- Breastfeeding is not significantly associated with S. aureus muco-cutaneous colonization in atopic infants.
- Maternal-infant S. aureus carriage concordance suggests other transmission routes or factors may be involved.
Background:
Studies on the effects of breastfeeding on the development of Atopic Dermatitis (AD) have shown controversial results. The importance of this condition deserves further studies; in particular, it remains unclear whether colonization of atopic patients by Staphylococcus aureus (S. aureus) through breastfeeding is relevant to the development of AD.
Objective:
To examine the potential relation between breastfeeding and colonization by S. aureus in atopic patients.
Method:
Transversal study of atopic patients, aged from 4 to 24 months, both genders, receiving outpatient care and 72 mothers. Data on infant breastfeeding practices and on clinical-epidemiological profile were registered. Swabs of the infants' nares and skin (cubital fossa) and swabs of the mothers' nares were collected. For univariate analysis, X2 (chi-square) and Fischer Exact's test were used.
Results:
Among breastfed children, S. aureus was isolated from 8 (25.8%) infants' nares swabs and from 4 (12.9%) skin swabs. Among not breastfed children, S. aureus was isolated from 10 (20.8%) infants' nares swabs and from 11 (22.9%) skin swabs. Sixteen mothers (22.2%) had S. aureus isolated from their nares swabs. There was no significant association between breastfeeding and S. aureus colonization (child skin and/or nares). However, there was a degree of concordance for S. aureus carriage among mothers and infants. Among 72 pairs, 56 (77.8%) were concordant.
Conclusion:
Breastfeeding was not associated with S. aureus muco-cutaneous colonization in atopic infants.
Related Concept Videos
Staphylococcal Skin Infections
Development of the Oral Microbiota
Clinical Significance of Antibiotic Resistance
Development of Human Microbiota
The Skin Microbiota
Surface Membrane Barriers
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...

