Cited by 61Oral microbiology and periodontitis researchNeonatal and Maternal InfectionsInfant Nutrition and Health

Dynamics of Microbial Colonization of the Oral Cavity in Newborns

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Nelson-Filho, Paulo, Borba, Izabela Goncalves, Mesquita, Kessia Suenia Fidelis de, Silva, Raquel Assed Bezerra, Queiroz, Alexandra Mussolino de, Silva, Lea Assed Bezerra·2013·Brazilian Dental Journal

Abstract

The host defense mechanisms are not well developed in neonates. The aim of this study was to evaluate the dynamics of microbial colonization of the oral cavity in newborns. Eighty-one samples of the oral microbiota were obtained from 51 healthy newborns 10 min to 53 h after birth by gently rubbing sterile swabs onto the surface of the tongue, cheek mucosa, alveolar process and palate. After microbiological processing, counting of the colony forming units of streptococci, staphylococci and Gram-negative aerobic bacilli was performed. Between 10 min and 8 h, Staphylococcus epidermidis was detected in 30.7% of the samples; between 8 and 16 h, S. epidermidis was detected in 69.5% of the samples and streptococci in 56.5% of the samples; between 16 and 24 h, S. epidermidis, streptococci and S. aureus were detected in 77.78%, 85.18% and 37.03% of the samples, respectively. Between 24 and 53 h, S. epidermidis was detected in 88.89%, streptococci in 94.4% and S. aureus in 33.3% of the samples. Mutans streptococci were not detected in any of the samples. The adoption of strict hygienic measures by the mother and the nursing staff should be emphasized to avoid or at least delay the occurrence of infections caused by microorganisms in newborns. In addition, hospital procedures must be aseptic and invasive interventions must be minimized.

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  • Streptococcus salivarius demonstrates the highest relative abundance among newborns and shows a steady decrease after 3 months of age.

    “Streptococcus salivarius demonstrates the highest relative abundance among newborns and shows a steady decrease after 3 months of age.119”
  • Following birth, overt colonization of the oral cavity with microbes occurs within 8-16 hours as a result of transmission of microbes vertically, from the diet, and horizontally.

    “Following birth, overt colonization of the oral cavity with microbes occurs within 8‐16 hours as a result of transmission of microbes vertically (through exposure to maternal skin and vaginal microbiomes), from the diet via oral fixation by the infant, and horizontally (from human interactions additional to those already mentioned).119, 120”

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Research works printed but not linked: 2

  1. Van Mellaert L, Shahrooei M, Hofmans D, Eldere JV. Immunoprophylaxis and immunotherapy of Staphylococcus epidermidis infections: challenges and prospects. Expert Rev Vaccines 2012;3:319-334.
  2. Kosteka F. Relation of the teeth to the normal development of microbial flora in the oral cavity. The Dental Cosmos 1924; 66:927-935.

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Authors
Nelson-Filho, P., Borba, I. G., Mesquita, K. S. F. D., Silva, R. A. B., Queiroz, A. M. D., & Silva, L. A. B.
Affiliations
  • University of Sao Paulo, Brazil
  • Universidade de São Paulo (BR)
Venue
Brazilian Dental Journal
Published
2013-07
Volume
24
Issue
4
Pages
415-419
ISSN
0103-6440 (ISSN-L)
OpenAlex
W2091506776
Cited by
60
References
25
Citations by year
2026: 1 · 2025: 3 · 2024: 6 · 2023: 13 · 2022: 6 · 2021: 5 · 2020: 6 · 2019: 5 · 2018: 6 · 2017: 3 · 2016: 4 · 2015: 1 · 2014: 1
FWCI
2.43
Type
journal article
Language
en
Open access
Licence
cc-by-nc
Locations
  • Brazilian Dental Journal (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (publishedVersion, other-oa)
  • Americanae (AECID Library) (submittedVersion, cc-by-nc)
Funders
Universidade de São Paulo
Topics
  • Health Sciences › Dentistry › Periodontics › Oral microbiology and periodontitis research
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Neonatal and Maternal Infections
  • Health Sciences › Nursing › Nutrition and Dietetics › Infant Nutrition and Health
Keywords
oral microbiota, microbial colonization, neonates, Staphylococcus epidermidis, Streptococcus, Staphylococcus aureus, mutans streptococci, host defense, maternal hygiene, aseptic technique
MeSH terms
Humans, Infant, Newborn, Mouth, Staphylococcus, Streptococcus, Colony Count, Microbial

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