Pathogenicity and virulence of Chlamydia trachomatis: Insights into host interactions, immune evasion, and intracellular survival

Chlamydia trachomatis is an obligate intracellular pathogen and the leading cause of bacterial sexually transmitted infections and infectious blindness worldwide. All Chlamydia species share a unique biphasic developmental cycle, alternating between infectious elementary bodies (EBs) and replicative...

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Main Authors: Alix McCullough, Steven Huang, Mary M. Weber
Format: Article
Language:English
Published: Taylor & Francis Group 2025-12-01
Series:Virulence
Subjects:
Online Access:https://www.tandfonline.com/doi/10.1080/21505594.2025.2503423
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author Alix McCullough
Steven Huang
Mary M. Weber
author_facet Alix McCullough
Steven Huang
Mary M. Weber
author_sort Alix McCullough
collection DOAJ
description Chlamydia trachomatis is an obligate intracellular pathogen and the leading cause of bacterial sexually transmitted infections and infectious blindness worldwide. All Chlamydia species share a unique biphasic developmental cycle, alternating between infectious elementary bodies (EBs) and replicative reticulate bodies (RBs). The pathogenesis of C. trachomatis is driven by a sophisticated arsenal of adhesins, conventional type III secretion system effector proteins, and inclusion membrane proteins that subvert host cellular processes to establish infection and promote survival. In this review, we highlight the molecular mechanisms underlying C. trachomatis infection, focusing on key stages of its developmental cycle, including adhesion, invasion, replication, and egress. We delve into its interactions with host cytoskeletal structures, immune signaling pathways, and intracellular trafficking systems, as well as its strategies for immune evasion and persistence. Understanding these mechanisms offers critical insights into C. trachomatis pathogenesis and identifies promising avenues for therapeutic and vaccine development.
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spelling doaj-art-e4f09073899047148487c6cd878fe1bd2025-08-20T02:30:47ZengTaylor & Francis GroupVirulence2150-55942150-56082025-12-0116110.1080/21505594.2025.2503423Pathogenicity and virulence of Chlamydia trachomatis: Insights into host interactions, immune evasion, and intracellular survivalAlix McCullough0Steven Huang1Mary M. Weber2Department of Microbiology and Immunology, University of Iowa Carver College of Medicine, Iowa City, IA, USADepartment of Microbiology and Immunology, University of Iowa Carver College of Medicine, Iowa City, IA, USADepartment of Microbiology and Immunology, University of Iowa Carver College of Medicine, Iowa City, IA, USAChlamydia trachomatis is an obligate intracellular pathogen and the leading cause of bacterial sexually transmitted infections and infectious blindness worldwide. All Chlamydia species share a unique biphasic developmental cycle, alternating between infectious elementary bodies (EBs) and replicative reticulate bodies (RBs). The pathogenesis of C. trachomatis is driven by a sophisticated arsenal of adhesins, conventional type III secretion system effector proteins, and inclusion membrane proteins that subvert host cellular processes to establish infection and promote survival. In this review, we highlight the molecular mechanisms underlying C. trachomatis infection, focusing on key stages of its developmental cycle, including adhesion, invasion, replication, and egress. We delve into its interactions with host cytoskeletal structures, immune signaling pathways, and intracellular trafficking systems, as well as its strategies for immune evasion and persistence. Understanding these mechanisms offers critical insights into C. trachomatis pathogenesis and identifies promising avenues for therapeutic and vaccine development.https://www.tandfonline.com/doi/10.1080/21505594.2025.2503423ChlamydiaT3SSInceffectoradhesionhost pathogen interactions
spellingShingle Alix McCullough
Steven Huang
Mary M. Weber
Pathogenicity and virulence of Chlamydia trachomatis: Insights into host interactions, immune evasion, and intracellular survival
Virulence
Chlamydia
T3SS
Inc
effector
adhesion
host pathogen interactions
title Pathogenicity and virulence of Chlamydia trachomatis: Insights into host interactions, immune evasion, and intracellular survival
title_full Pathogenicity and virulence of Chlamydia trachomatis: Insights into host interactions, immune evasion, and intracellular survival
title_fullStr Pathogenicity and virulence of Chlamydia trachomatis: Insights into host interactions, immune evasion, and intracellular survival
title_full_unstemmed Pathogenicity and virulence of Chlamydia trachomatis: Insights into host interactions, immune evasion, and intracellular survival
title_short Pathogenicity and virulence of Chlamydia trachomatis: Insights into host interactions, immune evasion, and intracellular survival
title_sort pathogenicity and virulence of chlamydia trachomatis insights into host interactions immune evasion and intracellular survival
topic Chlamydia
T3SS
Inc
effector
adhesion
host pathogen interactions
url https://www.tandfonline.com/doi/10.1080/21505594.2025.2503423
work_keys_str_mv AT alixmccullough pathogenicityandvirulenceofchlamydiatrachomatisinsightsintohostinteractionsimmuneevasionandintracellularsurvival
AT stevenhuang pathogenicityandvirulenceofchlamydiatrachomatisinsightsintohostinteractionsimmuneevasionandintracellularsurvival
AT marymweber pathogenicityandvirulenceofchlamydiatrachomatisinsightsintohostinteractionsimmuneevasionandintracellularsurvival