Results 21 to 30 of about 583 (89)

High salivary levels of JP2 genotype of Aggregatibacter actinomycetemcomitans is associated with clinical attachment loss in Moroccan adolescents [PDF]

Clinical and Experimental Dental Research, 2019
AbstractIt has previously been shown that the presence of Aggregatibacter actinomycetemcomitans in subgingival plaque is significantly associated with increased risk for clinical attachment loss. The highly leukotoxic JP2 genotype of this bacterium is frequently detected in adolescents with aggressive forms of periodontitis.
Dorte Haubek, Oumkeltoum Ennibi, Anders Johansson   +2 more
exaly   +7 more sources

Aggregatibacter actinomycetemcomitans and Filifactor alocis as Associated with Periodontal Attachment Loss in a Cohort of Ghanaian Adolescents [PDF]

Microorganisms, 2022
The aims of the present study were to document the presence of Aggregatibacter actinomyctemcomitans and the emerging oral pathogen Filifactor alocis, as well as to identify genotypes of these bacterial species with enhanced virulence.
Zeinab Razooqi, Carola Höglund Åberg, Francis Kwamin, Rolf Claesson, Dorte Haubek, Jan Oscarsson, Anders Johansson   +6 more
doaj   +2 more sources

Multilocus Sequence Typing of Non-JP2 Serotype b Aggregatibacter actinomycetemcomitans Strains of Ghanaian and Swedish Origin [PDF]

Frontiers in Cellular and Infection Microbiology, 2021
Objective and MethodsThe Gram-negative bacterium, Aggregatibacter actinomycetemcomitans is associated with periodontitis affecting young individuals. The geographic dissemination of the highly leukotoxic JP2 genotype of serotype b of this species was ...
Rolf Claesson, Anders Johansson, Carola Höglund Åberg, Anders Esberg, Dorte Haubek, Jan Oscarsson   +5 more
doaj   +2 more sources

Honey Compounds Exhibit Antibacterial Effects Against Aggregatibacter actinomycetemcomitans JP2 [PDF]

Antibiotics
Background: Aggregatibacter actinomycetemcomitans JP2 genotype is a virulent pathogen linked to severe periodontitis and systemic diseases. Honey and royal jelly (RJ) have demonstrated bioactive properties against this microorganism.
Abdelhadi Hbibi, Amine Ezzahi, Ferhat Ozturk, Niels A. J. Cremers, Jalal Kasouati, Ahmed Moussaif, Anders Johansson, Mimoun Zouhdi, Babacar Touré, Itto Maroui   +9 more
doaj   +2 more sources

Multilocus Sequence Typing of Aggregatibacter actinomycetemcomitans Competently Depicts the Population Structure of the Species [PDF]

Microbiology Spectrum, 2021
We developed a multilocus sequence typing scheme (MLST) for Aggregatibacter actinomycetemcomitans based on seven housekeeping genes, adk, atpG, frdB, mdh, pgi, recA, and zwf. A total of 188 strains of seven serotypes were separated into 57 sequence types.
Signe Nedergaard, Anne B. Jensen, Dorte Haubek, Niels Nørskov-Lauritsen   +3 more
doaj   +2 more sources

Association of Filifactor alocis and its RTX toxin gene ftxA with periodontal attachment loss, and in synergy with Aggregatibacter actinomycetemcomitans [PDF]

Frontiers in Cellular and Infection Microbiology
The Gram-positive bacterium, Filifactor alocis is an oral pathogen, and approximately 50% of known strains encode a recently identified repeat-in-toxin (RTX) protein, FtxA. By assessing a longitudinal Ghanaian study population of adolescents (10-19 years
Zeinab Razooqi, Ingeborg Tjellström, Carola Höglund Åberg, Francis Kwamin, Rolf Claesson, Dorte Haubek, Anders Johansson, Jan Oscarsson   +7 more
doaj   +2 more sources

Usefulness of real time PCR for the differentiation and quantification of 652 and JP2 Actinobacillus actinomycetemcomitans genotypes in dental plaque and saliva [PDF]

BMC Infectious Diseases, 2006
Background The aim of our study is to describe a fast molecular method, able to distinguish and quantize the two different genotypes (652 and JP2) of an important periodontal pathogen: Actinobacillus actinomycetemcomitans.
Piras Vincenzo, Baldoni Marco, Cotti Marina, Isola Daniela, Ciusa Maria, Marini Mario, Orrù Germano, Pisano Elisabetta, Montaldo Caterina   +8 more
doaj   +4 more sources

Leukotoxic activity of Aggregatibacter actinomycetemcomitans and periodontal attachment loss. [PDF]

PLoS ONE, 2014
Aggregatibacter actinomycetemcomitans is a Gram-negative periodontitis-associated bacterium that expresses a toxin that selectively affects leukocytes.
Carola Höglund Åberg, Dorte Haubek, Francis Kwamin, Anders Johansson, Rolf Claesson   +4 more
doaj   +1 more source

Characterization of Aggregatibacter actinomycetemcomitans Serotype b Strains with Five Different, Including Two Novel, Leukotoxin Promoter Structures

Vaccines, 2020
The JP2 genotype of A. actinomycetemcomitans, serotype b has attracted much interest during the past three decades due to its close association with periodontitis in young individuals and the enhanced expression of a leukotoxin (LtxA).
Rolf Claesson, Huei-Min Chiang, Mark Lindholm, Carola Höglund Åberg, Dorte Haubek, Anders Johansson, Jan Oscarsson   +6 more
doaj   +1 more source

Prevalence of Aggregatibacter actinomycetemcomitans and Periodontal Findings among 14 to 15-Year Old Danish Adolescents: A Descriptive Cross-Sectional Study

Pathogens, 2020
Aggregatibacter actinomycetemcomitans (Aa) is a keystone pathogen associated with periodontitis in adolescents. The knowledge on the prevalence of Aa and periodontitis among adolescents in Northern Europe is sparse.
Anne Birkeholm Jensen, Flemming Isidor, Marianne Lund, Michael Væth, Anders Johansson, Niels Nørskov Lauritsen, Dorte Haubek   +6 more
doaj   +1 more source