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Cell. Infect. Microbiol."],"abstract":"<jats:p>The ability to genetically manipulate a pathogen is fundamental to discovering factors governing host\u2013pathogen interactions at the molecular level and is critical for devising treatment and prevention strategies. While the genetic \u201ctoolbox\u201d for many important bacterial pathogens is extensive, approaches for modifying obligate intracellular bacterial pathogens were classically limited due in part to the uniqueness of their obligatory lifestyles. Many researchers have confronted these challenges over the past two and a half decades leading to the development of multiple approaches to construct plasmid-bearing recombinant strains and chromosomal gene inactivation and deletion mutants, along with gene-silencing methods enabling the study of essential genes. This review will highlight seminal genetic achievements and recent developments (past 5 years) for <jats:italic>Anaplasma<\/jats:italic> spp., <jats:italic>Rickettsia<\/jats:italic> spp., <jats:italic>Chlamydia<\/jats:italic> spp., and <jats:italic>Coxiella burnetii<\/jats:italic> including progress being made for the still intractable <jats:italic>Orientia tsutsugamushi<\/jats:italic>. Alongside commentary of the strengths and weaknesses of the various approaches, future research directions will be discussed to include methods for <jats:italic>C<\/jats:italic>. <jats:italic>burnetii<\/jats:italic> that should have utility in the other obligate intracellular bacteria. Collectively, the future appears bright for unraveling the molecular pathogenic mechanisms of these significant pathogens.<\/jats:p>","DOI":"10.3389\/fcimb.2023.1202245","type":"journal-article","created":{"date-parts":[[2023,6,19]],"date-time":"2023-06-19T05:27:56Z","timestamp":1687152476000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":24,"title":["Recent advances in genetic systems in obligate intracellular human-pathogenic bacteria"],"prefix":"10.3389","volume":"13","author":[{"given":"Derek J.","family":"Fisher","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paul A.","family":"Beare","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2023,6,19]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"949","DOI":"10.1016\/j.femsre.2005.03.002","article-title":"The Chlamydial developmental cycle","volume":"29","author":"Abdelrahman","year":"2005","journal-title":"FEMS Microbiol. 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