Related Experiment Video
Updated: Jan 22, 2026

An Adoptive Transfer Model of Rheumatoid Arthritis in Mice
Published on: June 6, 2025
Filifactor alocis and Dialister pneumosintes in a Mexican population affected by periodontitis and rheumatoid
José Luis Ayala Herrera1,2, Luis Apreza Patrón2, Rita Elizabeth Martínez Martínez2
1School of Dentistry, De La Salle University, León México, Avenida Universidad 602, Colonia Lomas del Campestre, León, 37150, Guanajuato, Mexico.
Abstract:
Filifactor alocis and Dialister pneumosintes have been associated with the initiation and progression of periodontitis (PE). We determined and compared the frequency of both bacteria in patients with PE, rheumatoid arthritis (RA), and PE/RA simultaneously. Detection was performed by polymerase chain reaction in the subgingival biofilm. Bacteria were more frequent in patients with PE, and clinical periodontal parameters such as pocket depth (PD) and clinical attachment loss (CAL) were significantly higher in patients with PE/RA. F. alocis and D. pneumosintes could influence PD and CAL, hence participating in the initiation and progression of PE in patients with RA.
Insights
Filifactor alocis and Dialister pneumosintes bacteria were more frequent in periodontitis (PE) patients. These bacteria may worsen periodontal disease (PD) and clinical attachment loss (CAL) in patients with co-occurring PE and rheumatoid arthritis (RA).
Area of Science:
- Microbiology
- Periodontology
- Rheumatology
Background:
- Filifactor alocis and Dialister pneumosintes are linked to periodontitis (PE) initiation and progression.
- Investigating the prevalence of these bacteria in patients with PE, rheumatoid arthritis (RA), and both conditions simultaneously is crucial.
Purpose of the Study:
- To determine and compare the frequency of F. alocis and D. pneumosintes in patients with PE, RA, and PE/RA.
- To assess the association of these bacteria with periodontal parameters like pocket depth (PD) and clinical attachment loss (CAL).
Main Methods:
- Polymerase chain reaction (PCR) was used to detect F. alocis and D. pneumosintes in subgingival biofilm samples.
- Clinical periodontal parameters (PD, CAL) were measured in all patient groups.
Main Results:
- Bacteria were more frequent in patients diagnosed with PE.
- Patients with co-occurring PE and RA exhibited significantly higher PD and CAL.
- A potential influence of F. alocis and D. pneumosintes on PD and CAL was observed.
Conclusions:
- F. alocis and D. pneumosintes are frequently detected in patients with periodontitis.
- These bacteria may play a role in the progression of periodontal disease, particularly in individuals with rheumatoid arthritis.
- Further research is warranted to elucidate the specific mechanisms by which these bacteria impact periodontal health in the context of RA.
More Related Videos
07:44Author Spotlight: Implementation of BIVA for Analyzing Disease Risk Factors in Patients with Low Body Cell Mass
Published on: July 14, 2023
09:31Generation of Induced-pluripotent Stem Cells Using Fibroblast-like Synoviocytes Isolated from Joints of Rheumatoid Arthritis Patients
Published on: October 16, 2016
Related Concept Videos
What is Population Genetics?
Conservation of Small Populations
Population Growth
What are Populations and Communities?
Conservation of Declining Populations
Testing a Claim about Mean: Known Population SD
Estimating a population mean requires the samples to be distributed normally. The data should be collected from the randomly selected samples having no sampling bias. The sample size needed to be higher than 30, and most importantly, the population standard deviation should be already known.
In most realistic situations, the population standard deviation is often unknown, but in rare circumstances, when it...