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This study evaluated the risk of exposure to ticks positive for spotted fever group (SFG) Rickettsia species among forestry workers. From 2017 to 2021, forestry workers passively collected ticks during field surveys for the USDA Forest Service\u2019s Forest Inventory and Analysis program. We screened 1395 ticks for SFG-Rickettsia, including Amblyomma americanum (51.5% positive, N\u2009=\u20091,279), A. maculatum (40% positive, N\u2009=\u200910), and Dermacentor variabilis (22.6%, N\u2009=\u2009106). The agent of Rocky Mountain spotted fever, R. rickettsii, was not detected; however, 7 different SFG Rickettsia species were identified. Rickettsia amblyommatis was the most common, present in 95.7% of A. americanum ticks. The pathogenic R. parkeri was rare, detected in 2 A. americanum nymphs and 2 A. maculatum males only. Several Rickettsia species, such as R. montanensis, R. monacensis, Candidatus R. andeanae, and R. tamurae subsp. buchneri, were identified in D. variabilis. Some of these species are suspected to be pathogenic. Rickettsia-positive ticks were detected year-round, with the highest prevalence in Tennessee and Kentucky, possibly due to larger sample submissions, which may have increased detection rates. Dermacentor variabilis were less likely to be Rickettsia-positive compared to A. americanum. Male ticks were less likely to carry Rickettsia than females and nymphs. The presence of Rickettsia-positive ticks found in this study poses a risk to forestry workers, emphasizing the importance of ongoing surveillance and education to prevent tick-borne infections.<\/jats:p>","DOI":"10.1093\/jme\/tjaf177","type":"journal-article","created":{"date-parts":[[2025,12,10]],"date-time":"2025-12-10T17:38:57Z","timestamp":1765388337000},"source":"Crossref","is-referenced-by-count":1,"title":["Beyond Rocky Mountain spotted fever: investigation of the presence and diversity of spotted fever\n                    <i>Rickettsia<\/i>\n                    species in ticks submitted from forestry workers"],"prefix":"10.1093","volume":"63","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9723-3238","authenticated-orcid":false,"given":"Vishvapali C","family":"Kobbekaduwa","sequence":"first","affiliation":[{"name":"Department of Entomology and Plant Pathology, University of Tennessee , Knoxville, TN,","place":["USA"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7629-1807","authenticated-orcid":false,"given":"Jennifer G","family":"Chandler","sequence":"additional","affiliation":[{"name":"Department of Entomology and Plant Pathology, University of Tennessee , Knoxville, TN,","place":["USA"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5734-1784","authenticated-orcid":false,"given":"James T","family":"Vogt","sequence":"additional","affiliation":[{"name":"USDA Forest Service, Southern Research Station , Athens, GA,","place":["USA"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2133-0220","authenticated-orcid":false,"given":"Rebecca T","family":"Trout Fryxell","sequence":"additional","affiliation":[{"name":"Department of Entomology and Plant Pathology, University of Tennessee , Knoxville, TN,","place":["USA"]}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[2025,12,10]]},"reference":[{"key":"2026031200522874200_tjaf177-B1","doi-asserted-by":"publisher","first-page":"922","DOI":"10.1089\/vbz.2011.0917","article-title":"Zoonotic infections among employees from Great Smoky Mountains and Rocky Mountain National Parks, 2008\u20132009","volume":"12","author":"Adjemian","year":"2012","journal-title":"Vector Borne Zoonotic Dis"},{"key":"2026031200522874200_tjaf177-B2","doi-asserted-by":"publisher","first-page":"72","DOI":"10.4269\/ajtmh.2009.80.72","article-title":"Spatial clustering by disease severity among reported Rocky Mountain spotted fever cases in the United States, 2001\u20132005","volume":"80","author":"Adjemian","year":"2009","journal-title":"Am. 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