In vitro effect of photodynamic therapy on aggregatibacter actinomycetemcomitans and Streptococcus sanguinis.

New periodontal disease treatments are needed to prevent infection progression. Photodynamic therapy (PDT) is one of the greatest pledges for this purpose. It involves the use of light of specific wavelength to activate a nontoxic photosensitizing agent in the presence of oxygen for eradication of target cells, and can be used for photokilling of microorganisms.

[Occurrence of Borrelia spp. in culture of embryonic cells of the tick Boophilus microplus (Acari: Ixodidae) in the state of the Mato Grosso do Sul, Brazil].

The aim of the present work was to report the occurrence of Borrelia spp. in embryonic cell cultures from naturally infected Boophilus microplus. Seven days after the beginning of a primary culture of embryonic cells of B.