Predominant cultivable flora in pericoronitis

Abstract

The predominant cultivable flora in pericoronitis was investigated by culturing pus from affected sites in 20 patients. Twenty colonies were picked at random from non-selective plates and identified using conventional biochemical and physiological tests, analysis of metabolic end-products by gas chromatography and protein profile analysis. The most frequently isolated organisms were Prevotella (Bacteroides) intermedia, Peptostreptococcus micros, Veillonella species, Fusobacterium nucleatum and Streptococcus mitis. Porphyromonas (Bacteroides) gingivalis was not isolated and asaccharolytic Eubacterium species were virtually absent. The predominant cultivable microflora in pericoronitis was found to be highly anaerobic in nature and superficially similar to that found in chronic periodontitis, although proposed marker organisms of severe periodontitis were absent.

Genetic Relationships among Eubacterium Species

“…The genus Eubacterium includes more than 40 species exhibiting diverse morphologies and shows biochemical, physiological, and serological heterogeneity (4,11,21,22,25,28,33). We have found that the oral Eubacterium species are clearly distinguished by serological reactions (24), and this immunological heterogeneity suggests that they are a genetically heterogeneous group of microorganisms.…”

“…Recognized among them in the past decade are many new species of Eubacterium (e.g., Eubacterium brachy, E. nodatum, E. timidum, E. yurii, and E. saphenum). Some of these species are associated with moderate and severe periodontitis and are less frequent in the supragingival sites or subgingival sites of healthy persons (13,19,32,34,35).The genus Eubacterium includes more than 40 species exhibiting diverse morphologies and shows biochemical, physiological, and serological heterogeneity (4,11,21,22,25,28,33). We have found that the oral Eubacterium species are clearly distinguished by serological reactions (24), and this immunological heterogeneity suggests that they are a genetically heterogeneous group of microorganisms.…”

Evaluationof the Mandibular Third Molar Pericoronitis Flora and ItsSusceptibility to Different Antibiotics PrescribedinFrance

“…The microbial flora that develops in the distally located pseudopocket is the major cause. This flora is predominantly anaerobic (3,14,17,19,20,23,26). Therapeutic management usually involves a local surgical procedure and the prescription of antibiotics, often of the ␤-lactam family (7).…”

Dental implant infection and decontaimination

“…15 .also reported that less common oral species, such as staphylococci, enteric species, and yeasts, were recovered from failing implants. The peri-implant microbiota differs depending on whether the individual is edentulous or partially edentulous.In particular, P. gingivalis was rarely isolated from edentulous individuals 16, which makes an interesting analogy to the paucity of P. gingivalis isolated from patients with pericoronitis 17 and those in the early stages of periodontitis 18. suggesting that in both cases the deeper periodontal pocket niches favored by P. gingivalis were missing. The microbiota of healthy and diseased dental implants appears to differ depending on the suspected etiology of implant symptoms.…”