Related Experiment Video
Updated: Jun 22, 2026
Generation and Multi-phenotypic High-content Screening of Coxiella burnetii Transposon Mutants
Published on: May 13, 2015
Intracellular life of Coxiella burnetii in macrophages
Eric Ghigo1, Lionel Pretat, Benoît Desnues
1URMITE CNRS UMR 6236 - IRD 3R198, Institut Fédératif de Recherche 48, Université de la Méditerranée, Marseille, France. Eric.Ghigo@univmed.fr
Abstract:
Coxiella burnetii, the agent of Q fever, is an obligate intracellular bacterium that is considered a potential biological weapon of category B. C. burnetii survives within myeloid cells by subverting receptor-mediated phagocytosis and preventing phagosome maturation. The intracellular fate of C. burnetii also depends on the functional state of myeloid cells. This review describes the mechanisms used by C. burnetii to circumvent uptake and trafficking events, and the role of cytokines on C. burnetii survival in myeloid cells.
Insights
Coxiella burnetii, the agent of Q fever, evades immune cells by blocking phagocytosis and maturation. Cytokines influence bacterial survival within myeloid cells, impacting disease progression.
Area of Science:
- Microbiology
- Immunology
- Pathogenesis
Background:
- Coxiella burnetii is an obligate intracellular bacterium responsible for Q fever.
- It is classified as a Category B biological weapon due to its potential threat.
- C. burnetii resides within myeloid cells, subverting host defenses.
Purpose of the Study:
- To review the mechanisms C. burnetii employs to evade host cell uptake and intracellular trafficking.
- To explore the influence of cytokines on C. burnetii survival within myeloid cells.
Main Methods:
- This study is a review of existing literature.
- It synthesizes findings on bacterial evasion strategies and host-pathogen interactions.
Main Results:
- C. burnetii actively subverts receptor-mediated phagocytosis to prevent engulfment.
- The bacterium inhibits phagosome maturation, creating a replicative niche within myeloid cells.
- The functional state of myeloid cells, modulated by cytokines, significantly affects C. burnetii survival.
Conclusions:
- C. burnetii utilizes sophisticated mechanisms to establish intracellular infection.
- Understanding these evasion strategies and the role of cytokines is crucial for developing effective countermeasures against Q fever.
