Revista Brasileira De Parasitologia Veterinaria最新文献

Diversity and distribution of Bartonella spp. in domestic animals, wildlife, and ectoparasites in Brazil: a comprehensive review. 巴尔通体在巴西家畜、野生动物和体外寄生虫中的多样性和分布：综合综述。

IF 1.2 4区农林科学

Revista Brasileira De Parasitologia Veterinaria Pub Date : 2026-10-26 eCollection Date: 2026-01-01 DOI: 10.1590/S1984-29612026047

Marcos Rogério André, Daniel Antônio Braga Lee, Lorena Freitas das Neves, Eliz Oliveira Franco, Rosangela Zacarias Machado

{"title":"Diversity and distribution of Bartonella spp. in domestic animals, wildlife, and ectoparasites in Brazil: a comprehensive review.","authors":"Marcos Rogério André, Daniel Antônio Braga Lee, Lorena Freitas das Neves, Eliz Oliveira Franco, Rosangela Zacarias Machado","doi":"10.1590/S1984-29612026047","DOIUrl":"https://doi.org/10.1590/S1984-29612026047","url":null,"abstract":"Bartonella are intracellular Gram-negative blood-borne bacteria capable of infecting a wide range of hosts, primarily mammals and birds. They are responsible for emerging and re-emerging infectious diseases characterized by persistent intraerythrocytic bacteremia in mammals. Out of 49 species described, 13 presents zoonotic potential. This review aimed to update the current knowledge on the occurrence, distribution, and genetic diversity of Bartonella in domestic animals, wild mammals and birds, and ectoparasites in Brazil. A total of 72 scientific articles published between 2007 and 2026 were included. The available information indicates that the Southeastern and Central-Western regions of Brazil account for most reports of Bartonella in animals and ectoparasites, whereas the Northern and Northeastern regions remain comparatively understudied. Overall, studies investigating Bartonella in Brazil have become increasingly frequent and geographically widespread over the years. Although some investigations rely on single-gene analyses, most employ multi-locus sequence analysis and phylogenetic reconstruction, providing stronger evidence for species identification and diversity. In contrast, relatively few studies have incorporated whole-genome sequencing or comprehensive phenotypic and biochemical characterization through bacterial isolation and blood culture. Future research should prioritize advanced genomic approaches and bacterial isolation to improve our understanding of the diversity, evolution, and epidemiology of Bartonella circulating in Brazil.","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"35 4","pages":"e012126"},"PeriodicalIF":1.2,"publicationDate":"2026-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149301519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Metacercariae of Posthodiplostomum Dubois, 1936 (Diplostomidae) infecting freshwater fish worldwide: infection patterns, host-parasite interactions, distribution range, and disease control. 世界淡水鱼的感染：感染模式、寄主-寄生虫相互作用、分布范围和疾病控制。

IF 1.2 4区农林科学

Revista Brasileira De Parasitologia Veterinaria Pub Date : 2026-10-09 eCollection Date: 2026-01-01 DOI: 10.1590/S1984-29612026045

Marcos Tavares-Dias

{"title":"Metacercariae of Posthodiplostomum Dubois, 1936 (Diplostomidae) infecting freshwater fish worldwide: infection patterns, host-parasite interactions, distribution range, and disease control.","authors":"Marcos Tavares-Dias","doi":"10.1590/S1984-29612026045","DOIUrl":"10.1590/S1984-29612026045","url":null,"abstract":"This study aimed to investigate the infection patterns, host-parasite interactions, distribution ranges, and control diseases by Posthodiplostomum metacercariae in freshwater fish on a global scale. We analyzed parasitological data from 203 freshwater fish species across 17 orders and 44 families, predominantly representing the Leuciscidae and Cichlidae families. The analysis identified a total of 10 Posthodiplostomum metacercariae species, although several studies did not identify the parasites to the species level. In host fish, prevalence, intensity and abundance levels of Posthodiplostomum metacercariae ranging from low to high. The metacercariae typically infected the body surface, musculature, mesentery or abdominal cavity, and internal organs of fish hosts, causing pathological effects that ranged from tissue damages to mortality, particularly in fry and juveniles. Regarding geographical distribution, metacercariae of Posthodiplostomum minimum occur across North America, whereas Posthodiplostomum vancleavei, Posthodiplostomum ptychocheilus and Posthodiplostomum centrarchi range from Canada to the United States. Posthodiplostomum cuticola, P. centrarchi and Posthodiplostomum brevicaudatum are distributed from Europa to Asia, while Posthodiplostomum scardini is restricted to Europe. In the Neotropics, metacercariae of Posthodiplostomum nanum occurs across South America, while Posthodiplostomum macrocotyle spans both South and Central America. Finally, this study highlights key research gaps particularly regarding parasite identification, prevention and treatments strategies.","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"35 3","pages":"e012226"},"PeriodicalIF":1.2,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13671226/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149197308","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

Heterologous antibody-based immunity in cattle naturally infected with Ostertagia ostertagi and Haemonchus sp. 牛腹蓟马和血蜱自然感染的异源抗体免疫。

IF 1.2 4区农林科学

Revista Brasileira De Parasitologia Veterinaria Pub Date : 2026-10-05 eCollection Date: 2026-01-01 DOI: 10.1590/S1984-29612026046

Damián Jesús Castro, Diego Daniel González, Carlos Augusto Margineda

{"title":"Heterologous antibody-based immunity in cattle naturally infected with Ostertagia ostertagi and Haemonchus sp.","authors":"Damián Jesús Castro, Diego Daniel González, Carlos Augusto Margineda","doi":"10.1590/S1984-29612026046","DOIUrl":"https://doi.org/10.1590/S1984-29612026046","url":null,"abstract":"Heterologous antibody‑mediated immunity was evaluated in cattle naturally infected with Ostertagia ostertagi (Oo) and Haemonchus sp. (Hp). Antibody responses were assessed using ovalbumin (OVA) as unrelated model antigen in three groups of eight heifers, matched for eggs per gram of feces (EPG) and allocated to independent, nematode‑free pastures. Anti‑OVA titers were determined in serum by ELISA. EPG counts and nematode genera were determined in feces using the modified McMaster technique and pooled cultures, respectively. All variables were analyzed using mixed models. One group was previously dewormed and considered the control (C) group. A second group was designated HO (90.4% Hp and 7.8% Oo). A third group was designated OH (19.6% Oo and 78.8% Hp). EPGs were absent in the C group, and no EPG differences were observed between the parasitized groups throughout the study. The OH group exhibited a lower anti‑OVA titer peak compared with the C (p = 0.015) and HO (p = 0.024) groups. Moderate prevalences of Oo may reduce heterologous antibody peaks without affecting the overall curve, whereas high prevalences of Hp may not alter heterologous antibody-based responses in cattle.","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"35 3","pages":"e010726"},"PeriodicalIF":1.2,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149138970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Serological evidence of exposure to Trypanosoma vivax in cattle from four regions of Colombia assessed by a point-of-care test. 通过护理点检测评估哥伦比亚四个地区牛接触间日锥虫的血清学证据。

IF 1.2 4区农林科学

Revista Brasileira De Parasitologia Veterinaria Pub Date : 2026-10-05 eCollection Date: 2026-01-01 DOI: 10.1590/S1984-29612026043

Veronica Camacho, Luiz Ricardo Gonçalves, Marcia Mariza Jusi Merino, Rosangela Zacarias Machado

{"title":"Serological evidence of exposure to Trypanosoma vivax in cattle from four regions of Colombia assessed by a point-of-care test.","authors":"Veronica Camacho, Luiz Ricardo Gonçalves, Marcia Mariza Jusi Merino, Rosangela Zacarias Machado","doi":"10.1590/S1984-29612026043","DOIUrl":"10.1590/S1984-29612026043","url":null,"abstract":"Trypanosoma vivax is one of the most pathogenic hemoparasites affecting ruminants, causing substantial economic losses in cattle production. Despite its importance, diagnosis remains challenging in several regions, limiting effective disease control. This study aimed to assess exposure to T. vivax infection in cattle from four regions of Colombia using a lateral flow point-of-care test (IMUNOTESTE®, Imunodot Diagnóstico Avançado) and to analyze its distribution according to different epidemiological variables. A total of 295 cattle of different breeds, ages, and production types were sampled, including animals with clinical suspicion of trypanosomosis and those from areas with previous reports of the disease. Overall, 48.1% of the animals (95% CI: 42.6-54.3%) were seropositive for T. vivax. Exposure was significantly associated with geographic region and production system, with the highest seropositivity observed in Santander (60%) and beef herds (57.4%), respectively, whereas no significant association was observed with age group (p = 0.179). The most common clinical findings among seropositive animals were cachexia and poor body condition. These results contribute to a better understanding of the epidemiology of T. vivax in Colombia and highlight the usefulness of rapid diagnostic tests as effective screening tools for disease surveillance and control.","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"35 3","pages":"e002426"},"PeriodicalIF":1.2,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13671221/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149138992","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

Description of a new species of Therodamas (Crustacea: Ergasilidae) from the gills of Trachelyopterus galeatus (Auchenipteridae) from the Brazilian Amazon. 文章标题巴西亚马逊河流域galeatus （Auchenipteridae）棘齿蝶鳃棘齿蝶一新种记述（甲壳纲：棘齿蝶科）。

IF 1.2 4区农林科学

Revista Brasileira De Parasitologia Veterinaria Pub Date : 2026-10-02 eCollection Date: 2026-01-01 DOI: 10.1590/S1984-29612026044

David Sales Sousa Valentim, Leonardo Oliveira Mota-Júnior, Edson Aparecido Adriano, Marcos Tavares-Dias, Marcos Sidney Brito Oliveira

{"title":"Description of a new species of Therodamas (Crustacea: Ergasilidae) from the gills of Trachelyopterus galeatus (Auchenipteridae) from the Brazilian Amazon.","authors":"David Sales Sousa Valentim, Leonardo Oliveira Mota-Júnior, Edson Aparecido Adriano, Marcos Tavares-Dias, Marcos Sidney Brito Oliveira","doi":"10.1590/S1984-29612026044","DOIUrl":"10.1590/S1984-29612026044","url":null,"abstract":"Therodamas comprises copepods that parasitize marine, brackish-water and freshwater fishes, and currently includes eight valid species. In this study, a new species for this genus was described from the gills of Trachelyopterus galeatus collected in the Jari River, eastern Amazon, Brazil. Parasites were analyzed using light microscopy, scanning electron microscopy and SSU-rDNA sequences. A total of 539 parasites has recovered, with prevalence of 69%, mean intensity of 18 parasites per host and mean abundance of 12 (standard deviation = 12.8). The new species, Therodamas anujauensis n. sp., is characterized by the absence of cephalic lobes, an elongated neck and a distinctive combination of setae and spines on the swimming legs. Phylogenetic analyses confirmed its placement within Ergasilidae and revealed a close relationship with Therodamas longicollum. Molecular dating suggested that the Therodamas lineage originated approximately 59.6 million years ago, whereas the divergence between T. anujauensis n. sp. and T. longicollum occurred about 6.03 million years ago. This study increases the number of known species of Therodamas from eight to nine and expands knowledge of parasite diversity in the Amazon region.","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"35 3","pages":"e006226"},"PeriodicalIF":1.2,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13671224/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149138995","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

Survey of endoparasites in Chelonoidis carbonarius and Chelonoidis denticulatus kept at the zoo of the Jungle Warfare Training Center (CIGS), Central Amazon. 亚马孙河中部丛林作战训练中心（CIGS）动物园饲养的石炭螯虾和小齿螯虾体内寄生虫调查。

IF 1.2 4区农林科学

Revista Brasileira De Parasitologia Veterinaria Pub Date : 2026-09-25 eCollection Date: 2026-01-01 DOI: 10.1590/S1984-29612026041

Elen Vinhote da Cunha, Dandara de Moraes Geissler, Luciene Almeida Siqueira, Eduardo Lima de Sousa, Adriano Teixeira de Oliveira

{"title":"Survey of endoparasites in Chelonoidis carbonarius and Chelonoidis denticulatus kept at the zoo of the Jungle Warfare Training Center (CIGS), Central Amazon.","authors":"Elen Vinhote da Cunha, Dandara de Moraes Geissler, Luciene Almeida Siqueira, Eduardo Lima de Sousa, Adriano Teixeira de Oliveira","doi":"10.1590/S1984-29612026041","DOIUrl":"10.1590/S1984-29612026041","url":null,"abstract":"The genus Chelonoidis tortoises are terrestrial reptiles susceptible to gastrointestinal endoparasites, mainly due to improper management. The present study aims to analyze the frequency of gastrointestinal parasites detected in samples from Chelonoidis carbonarius and Chelonoidis denticulatus, and to identify and characterize taxonomically the main parasite types. Seven samples of fresh feces were collected from enclosures at the Jungle Warfare Training Center (CIGS) Zoo in Manaus, Amazonas, and evaluated. A high frequency of intestinal endoparasites was observed, with nematode eggs from the families Ascarididae (suggestive of Angusticaecum spp.) (35.5%), Oxyurida (6.3%), and Strongylidae/Ancylostomatidae (strongylid type) (25%) being identified. Among the protozoa, oocysts of Eimeria spp. (6.3%), Cystoisospora spp. (6.3%), and Cyclospora spp. (6.3%) were detected, in addition to the trophozoite of Ciliophora (6.3%). It has been found that captive animals are prone to helminth and protozoan parasitic infections due to limited space and contact with waste, making it necessary to encourage coproparasitological analysis and studies in reptiles to ensure knowledge of diseases related to gastrointestinal parasites and promote control, prophylaxis, and treatment measures that minimize possible risks to animal and public health.","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"35 3","pages":"e013826"},"PeriodicalIF":1.2,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13671223/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149117128","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

Molecular identification of Raillietina echinobothrida (Davaineidae) from domestic chickens in the Fergana Valley, Uzbekistan. 乌兹别克斯坦费尔干纳谷地家鸡中棘足铁虱的分子鉴定。

IF 1.2 4区农林科学

Revista Brasileira De Parasitologia Veterinaria Pub Date : 2026-09-25 eCollection Date: 2026-01-01 DOI: 10.1590/S1984-29612026042

Islomjon Zokirov, Bakhtiyorjon Abduvaliev, Mirzakarim Yunusov

{"title":"Molecular identification of Raillietina echinobothrida (Davaineidae) from domestic chickens in the Fergana Valley, Uzbekistan.","authors":"Islomjon Zokirov, Bakhtiyorjon Abduvaliev, Mirzakarim Yunusov","doi":"10.1590/S1984-29612026042","DOIUrl":"10.1590/S1984-29612026042","url":null,"abstract":"Raillietina species are among the most common cestodes of backyard chickens, but their morphological similarity complicates reliable species-level identification. This study aimed to identify Raillietina echinobothrida from domestic chickens (Gallus gallus domesticus) in the Fergana Valley, Uzbekistan, combining morphological examination with molecular analysis of the internal transcribed spacer 2 (ITS-2). Between 2021 and 2024, 80 chickens from rural households in Vodil, Sultonobod and Mirzaobod were examined by complete helminthological dissection. Recovered cestodes were assessed morphologically, and three specimens were subjected to PCR and Sanger sequencing of the ITS region (GenBank accessions PQ360975, PZ581203 and PZ581202); the ITS-2 fragment was used for comparison. Raillietina specimens were detected in 25.0% (20/80; 95% CI: 16.8-35.5) of the chickens (mean intensity 8.3 ± 4.0 worms per infected bird; range 2-15). Morphological characters agreed with published descriptions of R. echinobothrida. BLAST analysis of the 385 bp ITS-2 fragment showed the highest similarity to R. echinobothrida from Iraq (98.44%) and Thailand (97.39%), and maximum likelihood analysis grouped the Fergana specimens with reference sequences of this species. These findings confirm the assignment of the Uzbek material to R. echinobothrida and support combining morphological and ITS-2-based approaches for reliable identification of Raillietina species.","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"35 3","pages":"e007326"},"PeriodicalIF":1.2,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13671225/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149117146","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

First report of anti-Toxoplasma gondii antibodies in the sand-dune tuco-tuco (Ctenomys flamarioni) from southern Brazil. 巴西南部沙丘巨蜥（Ctenomys flamarioni）中首次发现弓形虫抗体。

IF 1.2 4区农林科学

Revista Brasileira De Parasitologia Veterinaria Pub Date : 2026-09-11 eCollection Date: 2026-01-01 DOI: 10.1590/S1984-29612026040

Matheus Guzzi Rubini, Aluizio Araújo Passos, Gabrieli Zanette, Greice Zorzato Gonchoroski, Thales Renato Ochotorena de Freitas, Daniel Galiano

{"title":"First report of anti-Toxoplasma gondii antibodies in the sand-dune tuco-tuco (Ctenomys flamarioni) from southern Brazil.","authors":"Matheus Guzzi Rubini, Aluizio Araújo Passos, Gabrieli Zanette, Greice Zorzato Gonchoroski, Thales Renato Ochotorena de Freitas, Daniel Galiano","doi":"10.1590/S1984-29612026040","DOIUrl":"10.1590/S1984-29612026040","url":null,"abstract":"The subterranean rodent Ctenomys flamarioni is an endemic species threatened by the proximity to anthropogenic environments, a factor that increases its contact with domestic animals. The protozoan Toxoplasma gondii is of particular concern because its definitive hosts include domestic and wild felids, while several species of wild mammals act as intermediate hosts. The present study aimed to evaluate the seroprevalence of T. gondii in two populations of C. flamarioni in coastal dune areas of southern Brazil with different degrees of anthropogenic disturbance. A total of 17 individuals were captured using Oneida Victor traps, including seven from a low anthropization area and ten from a highly anthropized area. In the field, blood samples were collected from the cranial vena cava, and the animals were released at their capture site. Serum samples were analyzed using an indirect hemagglutination assay. The overall seroprevalence was 41.2%, with similar values between areas: 42.9% (low anthropization) and 40.0% (highly anthropized). Our results demonstrate that C. flamarioni is exposed to T. gondii in environments with both low and high degrees of anthropogenic influence. The detection of this zoonotic parasite highlights the role of human-altered environments in facilitating pathogen transmission to wildlife.","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"35 3","pages":"e010426"},"PeriodicalIF":1.2,"publicationDate":"2026-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13671222/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148992143","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

Helminth parasites of characiform fishes from farming systems in the states of Acre and Maranhão, Western Amazonia and Northeastern regions, Brazil. 巴西西亚马逊河流域和东北地区阿克里州和马兰赫<e:1>州养殖系统中特有鱼类的寄生虫。

IF 1.2 4区农林科学

Revista Brasileira De Parasitologia Veterinaria Pub Date : 2026-08-31 eCollection Date: 2026-01-01 DOI: 10.1590/S1984-29612026039

Rayane Duarte, Yuri Costa de Meneses, Marcia Cristina Nascimento Justo, Giovanna Oliveira de Nigris, Gabriela Cristina de França Mendonça, Maralina Torres da Silva, Simone Chinicz Cohen

{"title":"Helminth parasites of characiform fishes from farming systems in the states of Acre and Maranhão, Western Amazonia and Northeastern regions, Brazil.","authors":"Rayane Duarte, Yuri Costa de Meneses, Marcia Cristina Nascimento Justo, Giovanna Oliveira de Nigris, Gabriela Cristina de França Mendonça, Maralina Torres da Silva, Simone Chinicz Cohen","doi":"10.1590/S1984-29612026039","DOIUrl":"10.1590/S1984-29612026039","url":null,"abstract":"Aquaculture has been recognized as one of the main solutions to the growing global food demand, as well as a significant resource for addressing the limitations imposed on wild fisheries. The most important fish species for Brazilian fish farming is Colossoma macropomum due to its zootechnical characteristics, economic and cultural importances. In cultivated systems, the presence of parasites can represent a major problem. Under these conditions, parasites of the phyla Acanthocephala and Platyhelminthes are commonly found parasitizing farmed fishes. This study aimed to investigate the helminth fauna and their parasitological indices in cultivated fish farms located in the municipalities of Imperatriz, state of Maranhão and in Rio Branco, state of Acre, Brazil. A total of 1,617 specimens of Monopisthocotyla were collected, and, among the endoparasites, 325 specimens belong to the phylum Acanthocephala and 10 specimens belonging to the class Trematoda were identified. The present study expands the known biodiversity and distribution of helminth parasites in South American aquaculture, providing new records for host-parasite associations and geographic locations in the states of Acre and Maranhão, Brazil.","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"35 3","pages":"e009626"},"PeriodicalIF":1.2,"publicationDate":"2026-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13560836/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148889081","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

Two new species of Protomicrocotyle Johnston & Tiegs, 1922 (Monogenea: Protomicrocotylidae) parasites of Caranx hippos (Linnaeus, 1776) (Carangiformes: Carangidae), from Tecolutla, Veracruz, Mexico. 墨西哥韦拉克鲁斯州Tecolutla市Caranx hipos原微子叶两新种（单属：原微子叶科）寄生虫（Linnaeus, 1776）（carangiforma: Carangidae）。

IF 1.2 4区农林科学

Revista Brasileira De Parasitologia Veterinaria Pub Date : 2026-08-14 eCollection Date: 2026-01-01 DOI: 10.1590/S1984-29612026035

Edgar Salvador Ramírez-Cruz, Scott Monks, Norma Leticia Manríquez-Morán, Griselda Pulido-Flores

{"title":"Two new species of Protomicrocotyle Johnston & Tiegs, 1922 (Monogenea: Protomicrocotylidae) parasites of Caranx hippos (Linnaeus, 1776) (Carangiformes: Carangidae), from Tecolutla, Veracruz, Mexico.","authors":"Edgar Salvador Ramírez-Cruz, Scott Monks, Norma Leticia Manríquez-Morán, Griselda Pulido-Flores","doi":"10.1590/S1984-29612026035","DOIUrl":"10.1590/S1984-29612026035","url":null,"abstract":"Two new species of Protomicrocotyle are described as parasites of the gill filaments of Caranx hippos from the Gulf of Mexico coast, characterized using morphological, morphometric, and molecular methods. Multivariate statistics (principal component and discriminant analyses) were used for the morphometric analyses. Pairwise genetic distances (p-distances) and cluster analyses using the Neighbor-joining method were performed using partial sequences of CO1 mtDNA and 28S rDNA of the new species and partial sequences of other species of Protomicrocotylidae from GenBank. Protomicrocotyle eamsae sp. nov. differs morphologically from other congeners by the presence of a retractile glandulomuscular organ in the prohaptor, and Protomicrocotyle pritchardae sp. nov. differs from other congeners by the body length and by the arrangement, shape, and number of testes. The new species was recovered as a distinct group, separate from other protomicrocotylids, based on CO1 mtDNA and 28S rDNA analyses. The results of the morphometric analysis of 91 morphological variables and the molecular analysis support the assignment of the new species to Protomicrocotyle in Caranx hippos from Tecolutla, Veracruz, Mexico.","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"35 3","pages":"e002726"},"PeriodicalIF":1.2,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13520636/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148800376","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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