{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T17:54:02Z","timestamp":1791482042545,"version":"4.3.4"},"reference-count":44,"publisher":"SAGE Publications","issue":"11","license":[{"start":{"date-parts":[[2015,11,1]],"date-time":"2015-11-01T00:00:00Z","timestamp":1446336000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Vector-Borne and Zoonotic Diseases"],"published-print":{"date-parts":[[2015,11]]},"abstract":"<jats:p>\n                    This study investigated the prevalence of\n                    <jats:italic toggle=\"yes\">Rickettsia<\/jats:italic>\n                    spp. and\n                    <jats:italic toggle=\"yes\">Ehrlichia canis<\/jats:italic>\n                    infection in dogs and their ectoparasites from rural and urban areas of two municipalities, Petrolina and Juazeiro, within a semiarid region (Caatinga biome) of northeastern Brazil, by immunofluorescence assay (IFA) and polymerase chain reaction (PCR). Overall, 12.1% (61\/504) and 23.0% (116\/504) of canine plasma samples had antibodies reactive to\n                    <jats:italic toggle=\"yes\">Rickettsia<\/jats:italic>\n                    spp. and\n                    <jats:italic toggle=\"yes\">E. canis. E. canis<\/jats:italic>\n                    DNA was detected by PCR in 8.3% (42\/504) of canine blood samples, whereas no blood sample was positive for\n                    <jats:italic toggle=\"yes\">Rickettsia<\/jats:italic>\n                    spp. The infection by\n                    <jats:italic toggle=\"yes\">E. canis<\/jats:italic>\n                    was determined by PCR in 4.9% (14\/285)\n                    <jats:italic toggle=\"yes\">Rhipicephalus sanguineus<\/jats:italic>\n                    sensu lato (s.l.) ticks and by\n                    <jats:italic toggle=\"yes\">Rickettsia felis<\/jats:italic>\n                    in 1.1% (3\/285) and 40.6% (74\/182) ticks and fleas, respectively. Multivariate regression analyses revealed that canine seropositivity to\n                    <jats:italic toggle=\"yes\">Rickettsia<\/jats:italic>\n                    spp. was associated statistically with the variables \u201cto reside in Petrolina\u201d and \u201cpresence of ectoparasites.\u201d Our results indicate that canine infection by\n                    <jats:italic toggle=\"yes\">E. canis<\/jats:italic>\n                    might be endemic in the Caatinga biome as it is in other Brazilian biomes. Although no previous serosurvey for\n                    <jats:italic toggle=\"yes\">Rickettsia<\/jats:italic>\n                    spp. has been conducted on dogs from the Caatinga biome, our values are much lower than the ones reported for rural dogs from other Brazilian biomes. These differences are likely related to the semiarid climate of the aatinga biome, which minimizes the exposure of rural dogs to\n                    <jats:italic toggle=\"yes\">Amblyomma<\/jats:italic>\n                    spp. ticks, the most common vectors of\n                    <jats:italic toggle=\"yes\">Rickettsia<\/jats:italic>\n                    spp. in Brazil. Considering that dogs are excellent sentinels for human exposure to\n                    <jats:italic toggle=\"yes\">Rickettsia<\/jats:italic>\n                    spp., we can infer that the risks of human acquiring tick-borne rickettsiosis in the Caatinga region of the present study are low. The rickettsial infection rates in fleas and ticks were not related to canine seropositivity;\n                    <jats:italic toggle=\"yes\">i.e<\/jats:italic>\n                    ., areas with higher\n                    <jats:italic toggle=\"yes\">Rickettsia<\/jats:italic>\n                    infection rates in fleas had the lowest canine seroreactivity to\n                    <jats:italic toggle=\"yes\">Rickettsia<\/jats:italic>\n                    spp.\n                  <\/jats:p>","DOI":"10.1089\/vbz.2015.1786","type":"journal-article","created":{"date-parts":[[2015,11,13]],"date-time":"2015-11-13T10:19:19Z","timestamp":1447409959000},"page":"645-651","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":17,"title":["Ectoparasite Infestations and Canine Infection by Rickettsiae and Ehrlichiae in a Semi-Arid Region of Northeastern Brazil"],"prefix":"10.1177","volume":"15","author":[{"given":"Ana Isabel","family":"Araes-Santos","sequence":"first","affiliation":[{"name":"Universidade Federal do Vale do S\u00e3o Francisco","place":["Brazil"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jonas","family":"Moraes-Filho","sequence":"additional","affiliation":[{"name":"Universidade de S\u00e3o Paulo","place":["Brazil"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Renata M.","family":"Peixoto","sequence":"additional","affiliation":[{"name":"Universidade Federal do Vale do S\u00e3o Francisco","place":["Brazil"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mariana G.","family":"Spolidorio","sequence":"additional","affiliation":[{"name":"Universidade de S\u00e3o Paulo","place":["Brazil"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S\u00e9rgio S.","family":"Azevedo","sequence":"additional","affiliation":[{"name":"Universidade Federal de Campina Grande","place":["Brazil"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mateus M.","family":"Costa","sequence":"additional","affiliation":[{"name":"Universidade Federal do Vale do S\u00e3o Francisco","place":["Brazil"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcelo B.","family":"Labruna","sequence":"additional","affiliation":[{"name":"Universidade de S\u00e3o Paulo","place":["Brazil"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mauricio C.","family":"Horta","sequence":"additional","affiliation":[{"name":"Universidade Federal do Vale do S\u00e3o Francisco","place":["Brazil"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2015,11,1]]},"reference":[{"key":"e_1_3_3_2_1","doi-asserted-by":"publisher","DOI":"10.1590\/S0103-84782007000300030"},{"key":"e_1_3_3_3_1","doi-asserted-by":"publisher","DOI":"10.1093\/jmedent\/41.5.126"},{"key":"e_1_3_3_4_1","doi-asserted-by":"publisher","DOI":"10.1590\/S1517-83822008000300014"},{"key":"e_1_3_3_5_1","doi-asserted-by":"publisher","DOI":"10.1603\/ME12272"},{"key":"e_1_3_3_6_1","first-page":"149","article-title":"The Caatinga dominium","volume":"4","author":"Andrade-Lima D","year":"1981","unstructured":"Andrade-Lima D. 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