Acquisition of mutans streptococci and periodontal pathogens by firstlings aged 7-19 months longitudinal study in families / Aquisição de Estreptococos mutans e periodontopatógenos por primogênitos de 7-19 meses de idade: estudo longitudinal em famílias

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

Oral colonization by pathogens as mutans streptococci (MS) and Porphyromonas gingivalis, microorganisms associated with caries and periodontal disease, respectively, is a pre-requirement for development of these multifactorial diseases. This longitudinal study investigated the period of acquisition and stability of colonization of MS and BANA-positive periodontal pathogens (P. gingivalis, T. denticola and T. forsythensis), as well as facilitating factors, in 14 firstlings aged 7-8 months at onset of the study (visit 1). The sample, selected based on the positivity of mothers to MS, consisted of 14 families comprising father, mother, infant and grandmother or aunt, living at the same home. At visit 1, the adults were submitted to clinical and radiographic examination for dental caries, establishment of the papillary bleeding index (PBS), BANA test in subgingival samples and tongue, collection of stimulated saliva for evaluation of the MS levels, and application of a questionnaire on health, transmission risk habits, feeding, hygiene and socioeconomic and educational conditions; at visit 2, the adults were once again submitted to clinical examination for dental caries and saliva collection for MS counting. The BANA test was reapplied at visits 2 and 3 only in mothers. The infants were assessed as to the presence and percentage of MS in non-stimulated saliva, presence of teeth, and lingual BANA test at the 3 visits. Except for one father, negative for MS, all fathers and mothers presented MS at the two visits. There was no difference in the DMFS, PBS and GI indexes and total of positive BANA tests between mothers and fathers. Only at visit 3, three out of the 14 children (21.4%) were MS-positive, with counting >1,000,000/ml of saliva. It was demonstrated that the mother is the family member that should be investigated, for evaluation of the possibility of acquisition of MS by the child. The conditions that seemed to be most associated with positivity of children were recent caries activity and high MS salivary levels in the mothers. However, even they should also present most of the following conditions: low socioeconomic and educational level, many transmission risk habits, poor oral hygiene and unnecessary or frequent utilization of sugar, to assure the association. No infant was colonized by BANA-positive periodontal pathogens, since the positive outcomes, observed in the 3 visits, were transitory. Investigations on the acquisition of oral pathogens by infants should be longitudinal.

ASSUNTO(S)

estreptococos mutans doenças periodontais (microbiologia) cárie dentária (microbiologia)

ACESSO AO ARTIGO

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