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  • Title: HLA-DR4 and number of mutans streptococci in saliva among dental students and staff.
    Author: Wallengren ML, Johnson U, Ericson D.
    Journal: Acta Odontol Scand; 1997 Oct; 55(5):296-8. PubMed ID: 9370027.
    Abstract:
    Our aim was to corroborate previous findings that HLA-DR4 carriers are characterized by higher levels of mutans streptococci in saliva than are individuals expressing other HLA-DR types. Of 68 subjects (dental students, staff, and faculty) who were sampled for salivary counts of mutants streptococci, 13 subjects with the lowest counts of mutans streptococci and 15 subjects with the highest counts were selected for HLA-typing. Of the 13 who expressed HLA-DR4, 8 were heavily colonized by mutants streptococci. Although a trend towards a relationship was found between HLA-DR4 carriage and high levels of mutans streptococci, it was not statistically significant. In this selected population, knowledge of how to minimize the risk of caries and mutans streptococci level may have influenced the results.
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