Revista Brasileira De Parasitologia Veterinaria最新文献_第2页

What can areas of low Dirofilaria immitis preventive governance teach us? 免疫丝虫较低地区的预防性治理能教给我们什么？

IF 1.2 4区农林科学

Revista Brasileira De Parasitologia Veterinaria Pub Date : 2026-08-03 eCollection Date: 2026-01-01 DOI: 10.1590/S1984-29612026037

Norma Labarthe, Simone Cristina Rosa, Flavya Mendes-de-Almeida, Fabiana Knakfuss, Roberto Teixeira, Bruno Alberigi, João Palmer, Camila Class, Lucas Lobão, Alynne da Silva Barbosa

{"title":"What can areas of low Dirofilaria immitis preventive governance teach us?","authors":"Norma Labarthe, Simone Cristina Rosa, Flavya Mendes-de-Almeida, Fabiana Knakfuss, Roberto Teixeira, Bruno Alberigi, João Palmer, Camila Class, Lucas Lobão, Alynne da Silva Barbosa","doi":"10.1590/S1984-29612026037","DOIUrl":"10.1590/S1984-29612026037","url":null,"abstract":"Dirofilaria immitis remains a significant canine pathogen in Brazil despite the long-standing availability of chemoprophylactic products. Higher infection rates in low-income areas, and the persistence of cases in populations with veterinary access, suggest gaps in preventive governance. A cross-sectional survey was conducted in two high-challenge areas of metropolitan Rio de Janeiro, Brazil, from June 2023 to January 2024. Dogs older than 1 year and not on heartworm prophylaxis during the previous 6 months were enrolled. Blood samples were tested for D. immitis antigen, and owner questionnaires captured demographic, environmental and clinical data. Risk factors were evaluated using binomial regression models. Among 526 dogs sampled, the overall antigen-positive rate was 22.6%, with a higher prevalence in Niterói-Maricá (27.0%) than in the Western area of the Rio de Janeiro municipality (18.15%). Male, short-coated, heavier or outdoor-living dogs had significantly higher odds of infection. Coughing was more frequent in antigen-positive dogs, while no significant associations with weight loss or lethargy were observed. Despite widespread veterinary recommendations, substantial infection rates persist, especially in low-income communities, underscoring failures in preventive governance. Integrated efforts from veterinarians, regulatory authorities and the animal-health industry are urgently needed to improve chemoprophylaxis uptake and protect canine health in endemic regions.","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"35 3","pages":"e008526"},"PeriodicalIF":1.2,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13441299/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148686418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of the intrinsic and extrinsic ecological effects on the helminth communities of Didelphis albiventris (Didelphimorphia, Didelphidae) in Atlantic Forest areas. 大西洋林区白斑Didelphis albiventris （didelphimoria, didelphididides, didelphididides）蠕虫群落的内在和外在生态效应评价

IF 1.2 4区农林科学

Revista Brasileira De Parasitologia Veterinaria Pub Date : 2026-08-03 eCollection Date: 2026-01-01 DOI: 10.1590/S1984-29612026036

Filipe Andrade Rangel, Thiago Dos Santos Cardoso, Bruna Silva Cirino, Sócrates Fraga da Costa-Neto, Camila Dos Santos Lucio, Roberto do Val Vilela, Arnaldo Maldonado-Júnior, Rosana Gentile

{"title":"Evaluation of the intrinsic and extrinsic ecological effects on the helminth communities of Didelphis albiventris (Didelphimorphia, Didelphidae) in Atlantic Forest areas.","authors":"Filipe Andrade Rangel, Thiago Dos Santos Cardoso, Bruna Silva Cirino, Sócrates Fraga da Costa-Neto, Camila Dos Santos Lucio, Roberto do Val Vilela, Arnaldo Maldonado-Júnior, Rosana Gentile","doi":"10.1590/S1984-29612026036","DOIUrl":"10.1590/S1984-29612026036","url":null,"abstract":"The white-eared opossum Didelphis albiventris is widely distributed throughout Brazil and hosts several parasite species. This study aimed to analyze the influence of intrinsic (sex and age of hosts) and extrinsic (locality and type of land use) factors on the helminth communities of the white-eared opossum in areas of the Atlantic Forest. Helminth samples from 93 D. albiventris specimens from six different localities were used: Belo Horizonte, MG; Curitiba and Guaíra, PR; Porto Alegre, RS; and Mamanguape and Santa Rita, PB. Fourteen species of helminths were identified: Aspidodera raillieti, Cruzia tentaculata, Turgida turgida, Viannaia hamata, Rhopalias coronatus, Rhopalias horridus, Duboisiella proloba, Travassostrongylus orloffi, Travassostrongylus sextus, Brachylaima advena, Plagiorchis didelphidis, Trichuris minuta, Trichuris didelphis, and Oligacanthorhynchus microcephalus. Female hosts and adult hosts had greater helminth species richness and abundance. The helminth species richness and abundance in D. albiventris were influenced by intrinsic (sex and age of the host) and extrinsic (locality and land use) factors with the locality being the main determinant. The structure of the helminth infracommunities varied spatially, with greater differences with increasing geographic distance, highlighting the complexity of host‒parasite interactions in wildlife.","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"35 3","pages":"e000526"},"PeriodicalIF":1.2,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13441301/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148686291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New record of Amblyomma dissimile in Caiman yacare in Southernmost Brazil: emerging risks of animal translocation. 在巴西最南端的凯门群岛中出现的新记录：动物易位的新风险。

IF 1.2 4区农林科学

Revista Brasileira De Parasitologia Veterinaria Pub Date : 2026-07-31 eCollection Date: 2026-01-01 DOI: 10.1590/S1984-29612026031

Clara Murussi Beheregaray, Luiza Rodrigues Tirelli, Laura Berger Nunes, Vinícius Baggio-Souza, Jorge da Silva Lima, David Driemeier, Saulo Petinatti Pavarini, João Fabio Soares

引用次数: 0

NGS‑based characterization of Eimeria spp. prevalence and diversity in broiler farms in northwestern São Paulo State, Brazil. 基于NGS的巴西<s:1>圣保罗州西北部肉鸡养殖场艾美耳球虫流行率和多样性特征分析

IF 1.2 4区农林科学

Revista Brasileira De Parasitologia Veterinaria Pub Date : 2026-07-31 eCollection Date: 2026-01-01 DOI: 10.1590/S1984-29612026032

Guilherme Zaratin Dumalakas, Bruna Matarucco Sampaio Beretta, Priscila Kataoka, Bruno Ferraz Itoyama, Brayan Kurahara, Marcelo Vasconcelos Meireles

{"title":"NGS‑based characterization of Eimeria spp. prevalence and diversity in broiler farms in northwestern São Paulo State, Brazil.","authors":"Guilherme Zaratin Dumalakas, Bruna Matarucco Sampaio Beretta, Priscila Kataoka, Bruno Ferraz Itoyama, Brayan Kurahara, Marcelo Vasconcelos Meireles","doi":"10.1590/S1984-29612026032","DOIUrl":"10.1590/S1984-29612026032","url":null,"abstract":"The aim of this study was to determine the prevalence and diversity of Eimeria spp. in commercial broiler chicken farms (CBCFs) across 20 municipalities in northwestern São Paulo State, Brazil. Eighty-eight fecal samples corresponding to 88 commercial broiler farms were examined by microscopic screening for Eimeria spp. oocysts. All positive samples were subjected to genus-specific nested PCR (18S rRNA gene) followed by next-generation sequencing to identify the Eimeria spp. Microscopy detected Eimeria spp. oocysts in 100% (88/88) of the samples. Next-generation sequencing revealed the following order of prevalence of Eimeria spp. sequences: Eimeria maxima: 83/88 (94.3%; CI: (87.4-97.6); Eimeria acervulina: 75/88 (85.2%; CI: 76.4-91.2); Eimeria necatrix/tenella: 19/88 (21.6%; CI: 14.3-31.3); Eimeria praecox: 19/88 (21.6%; CI: 14.3-31.3); and Eimeria mitis/mivati: 10/88 (11.4%; CI: 6.3-19.7). No sequences corresponding to Eimeria brunetti, Eimeria lata, Eimeria nagambie, and Eimeria zaria were detected. In conclusion, the highest prevalences were observed for E. maxima and E. acervulina, whereas E. tenella/necatrix, E. mitis/mivati, and E. praecox showed lower prevalences. Eimeria brunetti, E. lata, E. nagambie, and E. zaria were not detected in CBCFs from northwestern São Paulo State.","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"35 3","pages":"e001126"},"PeriodicalIF":1.2,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13441308/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148686275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ectoparasite fauna of the lebranche mullet, Mugil liza, from a coastal lagoon in the Southwestern Atlantic. 来自西南大西洋沿海泻湖的鲻鱼的外寄生动物群。

IF 1.2 4区农林科学

Revista Brasileira De Parasitologia Veterinaria Pub Date : 2026-07-20 eCollection Date: 2026-01-01 DOI: 10.1590/S1984-29612026029

Laura Frantelmo Cavalheiro, Rayane Duarte, Marco Antonio Santos Silva Júnior, Rafael de Almeida Tubino, Michelle Daniele Dos Santos-Clapp

{"title":"Ectoparasite fauna of the lebranche mullet, Mugil liza, from a coastal lagoon in the Southwestern Atlantic.","authors":"Laura Frantelmo Cavalheiro, Rayane Duarte, Marco Antonio Santos Silva Júnior, Rafael de Almeida Tubino, Michelle Daniele Dos Santos-Clapp","doi":"10.1590/S1984-29612026029","DOIUrl":"10.1590/S1984-29612026029","url":null,"abstract":"Coastal lagoons are among the most productive aquatic ecosystems worldwide and are widely used by mugilid fishes. Mugil liza stands out as one of the main resources of lagoon fisheries in southern and southeastern Brazil. This study aimed to identify the species composing the ectoparasite fauna of M. liza from the Maricá Lagoon, Rio de Janeiro State, Brazil. A total of 44 specimens of M. liza were examined, of which 95.4% were parasitized by at least one ectoparasite species. Six ectoparasite species were recorded. The copepod Ergasilus caraguatatubensis was the most representative species, with prevalence (P) of 86.4%, followed by the copepods Bomolochus nitidus (P = 43.2%), Caligus sp. (P = 2.3%) and Naobranchia lizae (P = 2.3%). The polyopisthocotylan Metamicrocotyla macracantha showed prevalence of 18.2% and the myxozoan Myxobolus episquamalis presented a low prevalence (P = 2.3%). The ectoparasite fauna of M. liza exhibited diversity, comprising six distinct families, highlighting the host's gills as an important site for parasite diversity. The results expand the environmental distribution of E. caraguatatubensis, B. nitidus, Caligus sp., N. lizae and M. macracantha within Rio de Janeiro State, increasing the known occurrence sites of these parasites, including lagoon.","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"35 2","pages":"e005626"},"PeriodicalIF":1.2,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13441307/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148550957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prevalence, spatial distribution, and economic impact of bovine cysticercosis in slaughtered animals under federal inspection in Minas Gerais, Brazil (2021-2022). 巴西米纳斯吉拉斯州联邦检查的屠宰动物中牛囊虫病的患病率、空间分布和经济影响（2021-2022）。

IF 1.2 4区农林科学

Revista Brasileira De Parasitologia Veterinaria Pub Date : 2026-07-20 eCollection Date: 2026-01-01 DOI: 10.1590/S1984-29612026025

Manoel Eduardo Silva, Felipe Boniedj Ventura Alvares, Thais Ferreira Feitosa, Marcela Zonta Rodrigues, Vinícius Longo Ribeiro Vilela

{"title":"Prevalence, spatial distribution, and economic impact of bovine cysticercosis in slaughtered animals under federal inspection in Minas Gerais, Brazil (2021-2022).","authors":"Manoel Eduardo Silva, Felipe Boniedj Ventura Alvares, Thais Ferreira Feitosa, Marcela Zonta Rodrigues, Vinícius Longo Ribeiro Vilela","doi":"10.1590/S1984-29612026025","DOIUrl":"10.1590/S1984-29612026025","url":null,"abstract":"This study evaluated prevalence, productive losses, and spatial distribution of cases in cattle slaughtered under the Federal Inspection Service (SIF) in Minas Gerais (2021-2022). A total of 297,802 animals were inspected; cysticercosis was detected in 0.44% (531/120,011) of cattle in 2021 and 0.24% (419/177,791) in 2022. Detection led to immediate condemnation of viscera, reducing carcass value by about 10%, and to conditional utilization of 37.1% (352/950) of carcasses by chilling and 15.8% (150/950) by heat treatment, with value reductions of 30% and 70%, respectively. Cysticerci were mainly located in the heart (45.2%), liver (40.1%), and head (21.2%), with rare occurrences in the tongue, diaphragm, and lungs. Estimated losses over two years exceeded R$ 900,000, likely underestimated given that SIF slaughter often supplies export markets. Spatial distribution analysis showed a higher concentration of positive animals originating from the municipalities of Nanuque, Governador Valadares, and Carlos Chagas. Despite the relatively low prevalence, the spatial concentration of cases and the observed distribution pattern suggest the influence of regional environmental factors in maintaining bovine cysticercosis transmission.","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"35 2","pages":"e018925"},"PeriodicalIF":1.2,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13441303/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148550965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anaplasmataceae circulation in wild mammals and ticks from Goiás state, midwestern Brazil. 巴西中西部Goiás州野生哺乳动物和蜱虫的无浆虫科循环。

IF 1.2 4区农林科学

Revista Brasileira De Parasitologia Veterinaria Pub Date : 2026-07-20 eCollection Date: 2026-01-01 DOI: 10.1590/S1984-29612026027

Raphaela Bueno Mendes Bittencourt, Ana Cláudia Calchi, Luiz Gustavo Schneider de Oliveira, Fabiana Marques Boabaid, Lucianne Cardoso Neves, Nicolas Jalowitzki de Lima, Ennya Rafaella Neves Cardoso, Gabriel Cândido Dos Santos, Lucas Lisboa Nunes Bonifácio, Filipe Dantas-Torres, Leo Caetano Fernandes da Silva, Marcos Rogério André, Felipe da Silva Krawczak

{"title":"Anaplasmataceae circulation in wild mammals and ticks from Goiás state, midwestern Brazil.","authors":"Raphaela Bueno Mendes Bittencourt, Ana Cláudia Calchi, Luiz Gustavo Schneider de Oliveira, Fabiana Marques Boabaid, Lucianne Cardoso Neves, Nicolas Jalowitzki de Lima, Ennya Rafaella Neves Cardoso, Gabriel Cândido Dos Santos, Lucas Lisboa Nunes Bonifácio, Filipe Dantas-Torres, Leo Caetano Fernandes da Silva, Marcos Rogério André, Felipe da Silva Krawczak","doi":"10.1590/S1984-29612026027","DOIUrl":"10.1590/S1984-29612026027","url":null,"abstract":"The Anaplasmataceae family comprises vector-borne alpha-proteobacteria with significant impact on animal and human health. In Brazil, the diversity and circulation of these agents in wild mammals require further exploration. This study investigated the presence of Anaplasmataceae agents in wild mammals, and ticks from Goiás state, in midwestern Brazil. A total of 97 blood samples, 22 tissue samples, and 69 ticks from 18 mammalian species were analyzed. Conventional PCR targeting the 16S rRNA gene revealed Anaplasmataceae DNA in 11.3% (11/97) of blood samples, 13.6% (3/22) in tissue samples and 2.9% (2/69) of tick specimens. Positive hosts included Subulo gouazoubira, Hydrochoerus hydrochaeris, Cerdocyon thous, Chrysocyon brachyurus, Tapirus terrestris, and Myrmecophaga tridactyla, as well as two Amblyomma sculptum ticks. Phylogenetic analysis based on the 16S rRNA gene from Anaplasma sp. detected in S. gouazoubira clustered with \"Candidatus Anaplasma boleense\", while 23S-5S rRNA (intergenic spacer) ITS supported a potentially undescribed Anaplasmataceae agent. A short 16S rRNA gene fragment showing high identity with \"Ca. Anaplasma boleense\" was detected in H. hydrochaeris for the first time. These findings expand current knowledge on the diversity and host range of Anaplasmataceae in Brazil, highlighting the role of wild mammals in maintaining these bacteria in Goiás state, midwestern Brazil.","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"35 2","pages":"e003426"},"PeriodicalIF":1.2,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13441309/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148550964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Health profile of captive African pygmy hedgehogs (Atelerix albiventris) in Paraná State, Southern Brazil. 巴西南部paran<e:1>州圈养非洲侏儒刺猬（Atelerix albiventris）的健康概况

IF 1.2 4区农林科学

Revista Brasileira De Parasitologia Veterinaria Pub Date : 2026-07-20 eCollection Date: 2026-01-01 DOI: 10.1590/S1984-29612026030.

Thiago Gallo Bizari, Flávia Carolina Meira Collere, André Saldanha Ferreira, Rogério Ribas Lange, Daiane Cristina Ribeiro Dambroski Nack, Maiara Paifer Martins Maia, Penélope Patricio Viviani de Moura, Rosangela Locatelli Dittrich, Fabiano Montiani Ferreira, Julia Galvão Arantes, Thállitha Samih Wischral Jayme Vieira, Rafael Felipe da Costa Vieira

{"title":"Health profile of captive African pygmy hedgehogs (Atelerix albiventris) in Paraná State, Southern Brazil.","authors":"Thiago Gallo Bizari, Flávia Carolina Meira Collere, André Saldanha Ferreira, Rogério Ribas Lange, Daiane Cristina Ribeiro Dambroski Nack, Maiara Paifer Martins Maia, Penélope Patricio Viviani de Moura, Rosangela Locatelli Dittrich, Fabiano Montiani Ferreira, Julia Galvão Arantes, Thállitha Samih Wischral Jayme Vieira, Rafael Felipe da Costa Vieira","doi":"10.1590/S1984-29612026030.","DOIUrl":"10.1590/S1984-29612026030.","url":null,"abstract":"African pygmy hedgehogs (Atelerix albiventris) are omnivorous mammals native to sub-Saharan Africa and popular exotic pets worldwide. Although their trade is illegal, it remains common in Brazil. Therefore, the aims of this study were to investigate the health status of hedgehogs from illegal breeding sites, through hematological, biochemical and fecal analyses, skin pathogen screening and molecular assays for hemotropic Mycoplasma spp. and tick-borne pathogens. Real-time PCR assays for hemotropic Mycoplasma spp. (16S rRNA) and conventional PCR assays for Theileria/Babesia spp. (18S rRNA) and Ehrlichia/Anaplasma spp. (16S rRNA) were applied. No ectoparasites were found at the time of sampling, and hematological and biochemical results indicated a good health status. Candida tropicalis (15/25, 60%), Mucor spp. (12/25, 48%), and Proteus vulgaris (10/25, 40%) were identified in fecal analysis. Skin's microbiological examinations revealed Staphylococcus spp. (25/25 - 100%) and Streptococcus spp. (13/25 - 52%). All samples tested negative for hemotropic Mycoplasma spp., Theileria/Babesia spp., and Ehrlichia/Anaplasma spp. These findings suggest that the evaluated animals were not infected with harmful pathogens. Understanding their potential role in zoonotic diseases is necessary, particularly in the context of exotic species.","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"35 2","pages":"e017425"},"PeriodicalIF":1.2,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13441300/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148550900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High resistance of Rhipicephalus microplus to acaricides in the Recôncavo baiano, state of Bahia, Brazil. 巴西巴伊亚州Recôncavo白亚诺地区微头虫对杀螨剂的高抗性研究。

IF 1.2 4区农林科学

Revista Brasileira De Parasitologia Veterinaria Pub Date : 2026-07-20 eCollection Date: 2026-01-01 DOI: 10.1590/S1984-29612026028

Juan Dario Puentes, Wendell Marcelo de Souza Perinotto, Ana Maria Dos Santos Lima, Larissa Claudino Ferreira, Ana Caroline Dantas Amorim, Vinícius Longo Ribeiro Vilela, Franklin Riet-Correa

{"title":"High resistance of Rhipicephalus microplus to acaricides in the Recôncavo baiano, state of Bahia, Brazil.","authors":"Juan Dario Puentes, Wendell Marcelo de Souza Perinotto, Ana Maria Dos Santos Lima, Larissa Claudino Ferreira, Ana Caroline Dantas Amorim, Vinícius Longo Ribeiro Vilela, Franklin Riet-Correa","doi":"10.1590/S1984-29612026028","DOIUrl":"10.1590/S1984-29612026028","url":null,"abstract":"This research aimed to quantify resistance levels to cypermethrin, chlorpyrifos, amitraz, ivermectin, and fipronil in Rhipicephalus microplus larvae from cattle farms in the Recôncavo baiano region of the State of Bahia, Brazil. We also identified associations between resistance level and operational factors. Engorged adult female ticks were collected from 14 farms to perform bioassays for the five acaricide classes and determine the intensity of resistance. A nonparametric Mann-Whitney U test was employed to identify categorical factors associated with resistance intensities. A high frequency of resistance was observed across all five compounds evaluated, even on farms that reported never using these products. On all farms, we found tick populations resistant to at least three acaricides. While cypermethrin, chlorpyrifos, and ivermectin showed the highest intensity of resistance (RR50: 38.06, 126, and 27.35, respectively), amitraz and fipronil showed the lowest (RR50: 11.28 and 1.06, respectively). In the Recôncavo baiano region, the incorporation of amitraz and fipronil in the formulation of strategic control protocols is recommended.","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"35 2","pages":"e003026"},"PeriodicalIF":1.2,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13441306/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148550988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coinfection with Trypanosoma evansi and Hepatozoon felis in a free-ranging jaguar (Panthera onca) in the Pantanal biome, Brazil. 巴西潘塔纳尔生物群系中一只自由放养的美洲虎（Panthera onca）同时感染伊文氏锥虫和猫肝虫。

IF 1.2 4区农林科学

Revista Brasileira De Parasitologia Veterinaria Pub Date : 2026-07-20 eCollection Date: 2026-01-01 DOI: 10.1590/S1984-29612026033

Brenda Maria Emanuela Silva Reis, Vithoria Eduarda Barboza Silva, Jordana Toqueto, Paloma Gabrieli da Silva, Stephanie Carrelo de Lima, Alda Izabel de Souza, Carlos Alberto do Nascimento Ramos

{"title":"Coinfection with Trypanosoma evansi and Hepatozoon felis in a free-ranging jaguar (Panthera onca) in the Pantanal biome, Brazil.","authors":"Brenda Maria Emanuela Silva Reis, Vithoria Eduarda Barboza Silva, Jordana Toqueto, Paloma Gabrieli da Silva, Stephanie Carrelo de Lima, Alda Izabel de Souza, Carlos Alberto do Nascimento Ramos","doi":"10.1590/S1984-29612026033","DOIUrl":"10.1590/S1984-29612026033","url":null,"abstract":"Coinfection with Trypanosoma evansi and Hepatozoon felis represents a rare occurrence in wild felids, with no previous reports in Panthera onca. A free-ranging adult male jaguar weighing approximately 70 kg was examined after being rescued from wildfires in the Brazilian Pantanal (Corumbá, Mato Grosso do Sul). The initial hematological evaluation (D0) revealed mild anemia (PCV: 27.7%; reference: 30-45%), with Trypanosoma spp. trypomastigotes forms detected by direct microscopy. Treatment with diminazene aceturate (3.5 mg/kg, IM) was instituted on D1. On D5, microscopy revealed Hepatozoon felis gamonts within leukocytes, characterizing coinfection. Molecular analysis by PCR confirmed the presence of both agents in the D0 sample, with amplification products of approximately 600 bp (Hepatozoon spp.) and 196 bp (T. evansi), validating the microscopic diagnosis. Despite treatment and the absence of microscopically detectable parasitemia on D12, anemia persisted (PCV: 21.7%). The animal progressed to death on D19 during sedation for wound management. At necropsy, severe pulmonary involvement (bronchiolitis, alveolitis, and endogenous lipid pneumonia) compatible with smoke inhalation injury was observed. These findings highlight the importance of integrating hemoparasite surveillance into rehabilitation and conservation protocols for threatened felids in fire-affected ecosystems.","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"35 2","pages":"e020025"},"PeriodicalIF":1.2,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13445973/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148550930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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