Typically, a childhood microflorathe mouth contains more than one strain of the bacteria S. Mutans, and in most cases, at least one species of bacteria, and is repeated at the child, and the mother or another family member. Nevertheless, the results showed that 72% of children meets one or more of S. Mutans, not detected in other family members. Perhaps this indicates that the child acquired the strains outside the family circle, possibly from other children.
"According to the basic theory, the transfer ofStreptococcus comes from the mother to the child, but the results of our study revealed that 40% of children do not have a single strain of S. Mutans, coinciding with the mother's bacteria "- says Stephanie Momeni, a graduate student of biological faculty of the University of Alabama. Interestingly, 22.8% of children 37 varieties coincide only with the sisters or brothers (relatives and cousins), which indicates the presence of another transmission channel within the family.
Among children with a set of streptococcus bacteria, notcoinciding with the strains of family members, 33% identified one rare strain. That means that perhaps this group results should not be taken into account. Moreover, probably rare species may move from organism to organism, but do not take root in the microflora of the action of other bacteria and high immunity.
S. mutans considered the main causative agents of decay, as is known to spread from person to person. In the study, 13 strains were identified in 119 children with the same species of S. Mutans in at least one relative. Thus, 76% of children matched strains with more than one relative (average number of coincidences - 3.24 strain rates varied from 1 to 11 strains). The main difference of this study is that not only considered the possibility of transmission of bacteria within the family, but also from the child to someone else's child. To determine the method of repetitive strains palindromic sequence. For each strain one genotype is transmitted whether it was determined or not relatives. The children who participated in the study, identified from 1 to 9 genotypes, therefore, as a result of 315 bacterial genotypes were considered.
The results confirmed that the mostfrequent mode of transmission of bacteria is the transition from mother to child. However, the researchers emphasize that there is a distribution channel from child to child, to be aware and to use this knowledge for the assessment, prevention and treatment of dental caries.
According to the scientists to confirm the resultsWork should hold another typing of strains by using an alternative method. It is also important to note that the study involved not all members of the family of each child, which could also have an impact on the final figures.