Observational studyDigestive diseases and sciences2019
Simkania negevensis in Crohn's Disease.
Observational study in Digestive diseases and sciences, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 9 citations in OpenAlex.
- Obligate intracellular bacteria and host cell death pathways-the matter of life and death.Cell and tissue research · 2025Review
- Identification and characterization of a ubiquitin E3 RING ligase of the Chlamydia-like bacterium Simkania negevensis.PLoS pathogens · 2025Article
- The role of long non-coding RNA in Crohn's disease.Heliyon · 2024Review
- Uncovering Microbial Composition of the Tissue Microenvironment in Bladder Cancer using RNA Sequencing Data.Journal of Cancer · 2024Article
- Modulation of Host Cell Death and Lysis Are Required for the Release ofFrontiers in cellular and infection microbiology · 2020Article
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Authors and funding
12 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundSimkania negevensis is an obligate intracellular Gram-negative bacterium (family Simkaniaceae, order Chlamydiales) that has been isolated from domestic and mains water supplies, is able to infect human macrophages, and can induce an inflammatory response in the host.
methodsFrom June to December 2016, in a single-center observational study, colonic Crohn's disease patients and controls (subjects undergoing screening for colorectal cancer) underwent blood tests to identify serum-specific immunoglobulin G (IgG) and immunoglobulin A (IgA) to S. negevensis and a colonoscopy with biopsies for detection of S. negevensis DNA by polymerase chain reaction (PCR).
resultsForty-three Crohn's disease patients and 18 controls were enrolled. Crohn's disease patients had higher prevalence of IgA antibodies to S. negevensis compared with controls (20.9% versus 0%, p = 0.04). Simkaniaceae negevensis DNA was detected in 34.9% and 5.6% of intestinal biopsies in Crohn's disease patients and controls, respectively (p = 0.02). All Crohn's disease patients with PCR-positive biopsies for S. negevensis were IgG seropositive, with specific IgA in 60% of them (p < 0.001). Immunosuppressive therapies, extraintestinal manifestations, or disease activity did not influence the presence of S. negevensis in the Crohn's disease population.
conclusionsWe identified S. negevensis in Crohn's disease patients by demonstrating the presence of S. negevensis mucosal DNA and seropositivity to the bacterium. These results could support the presence of an acute or persistent S. negevensis infection and suggest a possible role in the pathogenesis of Crohn's disease.
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