Abthyllane Amaral de Carvalho, Roger Leomar da Silva Ferreira, Lilia Suzane de Oliveira Nascimento, Luize Cristine Pantoja Dos Reis, Kalieli Martins Silva, Luana Silva Bittencourt, Marcela Nunes Videira, Elane Guerreiro Giese
{"title":"A new myxozoan parasitizing Mesonauta festivus (Cichliformes: Cichlidae) from the lake region in the municipality of Tartarugalzinho, Eastern Amazon, Brazil.","authors":"Abthyllane Amaral de Carvalho, Roger Leomar da Silva Ferreira, Lilia Suzane de Oliveira Nascimento, Luize Cristine Pantoja Dos Reis, Kalieli Martins Silva, Luana Silva Bittencourt, Marcela Nunes Videira, Elane Guerreiro Giese","doi":"10.1590/S1984-29612024059","DOIUrl":"10.1590/S1984-29612024059","url":null,"abstract":"<p><p>The Amazon is the largest river basin in the world and it is home to the greatest diversity of freshwater fish in the world. Mesonauta festivus is a cichlid popularly known as flag cichlid, widely distributed throughout South America. The diversity of parasites in fish from the Amazon region is still underestimated, due to the high fishes diversity. The Myxozoa class has a universal distribution, with some specimens being pathogenic to some fish. The aim of this work was to describe a new species of Hoferellus in M. festivus. The fish were collected in the lake region, municipality of Tartarugalzinho, in the state of Amapá, Brazil. The new species was found parasitizing the urinary bladder of M. festivus. Spores were 11.5 ±1.1 (10.4-12.6) µm long and 10.9 ±1 (9.9-11.9) µm wide, and polar capsules were equally sized, measuring 4.9 ±0.5 (4.4-5.4) µm long and 3.4 ±0.9 (2.5-4.3) µm wide, with a pyriform shape, convergent with the apical region of the spore. The polar filament was wound with 5 to 6 turns. Morphological, morphometric, molecular and phylogenetic analysis proved that it is a new species of Hoferellus in the Amazon region.</p>","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"33 3","pages":"e013224"},"PeriodicalIF":1.3,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11486460/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142394510","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}
Hafiz Muhammad Rizwan, Hafiz Muhammad Zohaib, Muhammad Sohail Sajid, Urfa Bin Tahir, Razia Kausar, Nadia Nazish, Mourad Ben Said, Nimra Anwar, Mahvish Maqbool, Dalia Fouad, Farid Shokry Ataya
{"title":"Unveiling the hidden threat: investigating gastrointestinal parasites and their costly impact on slaughtered livestock.","authors":"Hafiz Muhammad Rizwan, Hafiz Muhammad Zohaib, Muhammad Sohail Sajid, Urfa Bin Tahir, Razia Kausar, Nadia Nazish, Mourad Ben Said, Nimra Anwar, Mahvish Maqbool, Dalia Fouad, Farid Shokry Ataya","doi":"10.1590/S1984-29612024061","DOIUrl":"10.1590/S1984-29612024061","url":null,"abstract":"<p><p>This study investigated the prevalence of gastrointestinal (GI) parasites in ruminants slaughtered at the abattoir in district Narowal, Punjab, Pakistan. The overall prevalence of parasitic infection was determined to be 72.92% based on faecal examination. Among the ruminant species, goats exhibited a significantly higher (P < 0.05) prevalence of parasitic infection (78.63%) compared to cattle, buffalo, and sheep. Additionally, female ruminants showed a significantly higher (P<0.05) prevalence of infection (85.62%) compared to males (65.13%). The intestines (both small and large) of small and large ruminants were found to be significantly more affected, with a prevalence of 39.58% of parasitic infection compared to other examined organs. A total of ten parasitic genera were identified in ruminants, including hydatid cysts. Ruminants with a high burden of parasites (45.74%) significantly outnumbered those with light (23.40%) and moderate (30.85%) burdens. Economically, the estimated annual losses in Pakistan due to organ condemnation with GI parasites were substantial, amounting to Pak. Rs. 405.09/- million (USD = 1,428,760). These findings underscore the significance of GI parasite infections as a major animal health concern and a cause of significant economic losses in the research area.</p>","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"33 3","pages":"e007224"},"PeriodicalIF":1.3,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11486462/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142394516","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}
Elaine Lopes de Carvalho, Ricardo Luis Sousa Santana, Tiago Paixão Mangas, Elane Guerreiro Giese
{"title":"Diversity of helminths parasitizing Phalacrocorax brasilianus (Gmelin, 1789) in the Brazilian Amazon.","authors":"Elaine Lopes de Carvalho, Ricardo Luis Sousa Santana, Tiago Paixão Mangas, Elane Guerreiro Giese","doi":"10.1590/S1984-29612024057","DOIUrl":"10.1590/S1984-29612024057","url":null,"abstract":"<p><p>This study was carried out in northern Brazil to determine the prevalence of helminth parasites that infect Phalacrocorax brasilianus (Gmelin, 1789). Between July 2020 and July 2023, adult and larvae parasites were collected from the respiratory and gastrointestinal tract of 30 birds that died in fishing nets and in fishing corral in the municipality of Soure on Marajó Island. The identified parasites included the nematodes Contracaecum sp., Contracaecum australe, Contracaecum rudolphii sensu lato, Contracaecum microcephalum, Contracaecum multipapillatum, Syncuaria squamata, Desportesius invaginatus, Tetrameres sp., Aplectana sp., Cyathostoma sp., Eucoleus contortus, Baruscapillaria spiculata, Baruscapillaria appendiculata; the trematodes Drepanocephalus spathans, Austrodiplostomum mordax, Austrodiplostomum compactum, Hysteromorpha triloba; the cestodes Paradilepis caballeroi; and the acanthocephalans Andracantha sp., Southwellina hispida and Southwellina macracanthus. The whole prevalence was 96.66% (29/30) and the most frequent helminths were nematodes (96.66%; 29/30), followed by acanthocephalans (66.66%; 20/30). These data increase the knowledge about helminths in cormorants widely distributed to Marajó Island.</p>","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"33 4","pages":"e011824"},"PeriodicalIF":1.3,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11452101/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142330597","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}
Daniela Bueno Mariani, Solange Maria Gennari, Herbert Sousa Soares, Renata Hurtado, Veridiana Caso Galizia, Maurizélia de Brito Silva, Eduardo Cavalcante de Macedo, Ricardo Augusto Dias, Jean Carlos Ramos Silva
{"title":"Toxoplasma gondii antibodies in tropical seabirds from the Rocas Atoll Biological Reserve, Brazil.","authors":"Daniela Bueno Mariani, Solange Maria Gennari, Herbert Sousa Soares, Renata Hurtado, Veridiana Caso Galizia, Maurizélia de Brito Silva, Eduardo Cavalcante de Macedo, Ricardo Augusto Dias, Jean Carlos Ramos Silva","doi":"10.1590/S1984-29612024052","DOIUrl":"10.1590/S1984-29612024052","url":null,"abstract":"<p><p>Toxoplasma gondii is a coccidian that infects almost all warm-blooded animals, including birds. Rocas Atoll Biological Reserve, located in the northeast of Brazil, is the only atoll in the South Atlantic, and home to the largest population of seabirds in the western Atlantic. In this study the occurrence of T. gondii antibodies in seabirds from Rocas Atoll were determined. Birds were manually captured, blood samples were taken, and antibodies detected by the modified agglutination test (>5). In total, 267 birds of seven species belonging to three families (Sternidae, Fregatidae and Sulidae) and two orders (Charadriiformes and Suliformes) were sampled. Out of the 267 samples, 20 (7.3%) were seropositive: nine out of 48 brown noddies (Anous stolidus), one out of 26 black noddies (Anous minutus), three out of 20 magnificent frigatebirds (Fregata magnificens), five out of 95 sooty terns (Onychoprion fuscatus) and two out of 20 red-footed boobies (Sula sula). None of the 33 masked boobies (Sula dactylatra) and the 25 brown boobies (Sula leucogaster) were seropositive. The antibody titers were 5 (n=6), 10 (n=4), 20 (n=3), 40 (n=6) and 160 (n=1). Due to the uniqueness of this environment, monitoring the seabirds is suggested to maintaining this Conservation Unit.</p>","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"33 4","pages":"e009924"},"PeriodicalIF":1.3,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11452100/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142330598","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}
Epitácio Correia de Farias Júnior, Ana Cecília Pires de Azevedo Lopes, Glauber Meneses Barboza Oliveira, Rafael Felipe da Costa Vieira, Marcelo Bahia Labruna, Jonatas Campos de Almeida
{"title":"First report of the soft tick Ornithodoros mimon (Ixodida: Argasidae) in Alagoas State, Northeastern Brazil.","authors":"Epitácio Correia de Farias Júnior, Ana Cecília Pires de Azevedo Lopes, Glauber Meneses Barboza Oliveira, Rafael Felipe da Costa Vieira, Marcelo Bahia Labruna, Jonatas Campos de Almeida","doi":"10.1590/S1984-29612024056","DOIUrl":"10.1590/S1984-29612024056","url":null,"abstract":"<p><p>The Brazilian tick fauna currently comprises 77 valid species categorized into two families: Ixodidae (53 species) and Argasidae (24 species). In the state of Alagoas, only six Ixodid ticks have been reported to date, with no previous reports of ticks in the Argasidae family. Here, we assessed 33 White-eared Opossum (Didelphis albiventris Lund, 1840) rescued in the metropolitan region of Maceió and referred to the Wild Animal Screening Center (Cetas) in the city. Upon arrival, the animals were examined for ectoparasites within 24 hours. In total, 10/33 (30%) opossums were found to be infested by 26 larvae of the argasid tick Ornithodoros mimon Kohls, Clifford & Jones, 1969. Morphological identification of ticks was corroborated by generating partial sequences of the mitochondrial 16S rRNA gene from three tick specimens. This study marks the first report of an argasid tick in the state of Alagoas. Future studies should investigate whether populations of both O. mimon ticks and their host, D. albiventris, in the state of Alagoas carry potential zoonotic agents capable of causing tick-borne diseases.</p>","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"33 4","pages":"e013424"},"PeriodicalIF":1.3,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11452102/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142299226","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}
Rafaella Tortoriello, Luisa Xavier Christ, Victoria Caroline de Almeida Marques, Bruna Sampaio Martins, Julio Israel Fernandes
{"title":"Effectiveness of lotilaner on furuncular myiasis in dogs naturally infested with Dermatobia hominis (Diptera: Cuterebridae).","authors":"Rafaella Tortoriello, Luisa Xavier Christ, Victoria Caroline de Almeida Marques, Bruna Sampaio Martins, Julio Israel Fernandes","doi":"10.1590/S1984-29612024054.","DOIUrl":"10.1590/S1984-29612024054.","url":null,"abstract":"<p><p>An evaluation was made of the larvicidal efficacy of lotilaner (Credeli®) in the treatment of dogs naturally infested with Dermatobia hominis larvae. A total of 12 dogs presenting at least three live D. hominis larvae were medicated. The animals were medicated orally with a single dose of no less than 20 mg/kg lotilaner. After drug administration, the animals remained at their homes, and observations were made to verify the larvicidal effect 6 hours after treatment. Live larvae were considered any parasite that exhibited motility after removal. For each animal was using the formula: 100 x [(total of live larvae before treatment - total live larvae after treatment) /total of live larvae before treatment] as criteria for evaluating lotilaner efficacy. A total of 98 larvae were counted in 12 dogs, with an average of 8.1 larvae per animal. The effectiveness of lotilaner was 80.6%. Nineteen larvae were found alive, albeit presenting hypomobility and lethargic behavior. However, note that the evaluation was performed just six hours after administration of the drug. Lotilaner administered orally in a single dose of 20 mg/kg showed 80.6% efficacy six hours after treating dogs naturally infested with D. hominis.</p>","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"33 3","pages":"e009524"},"PeriodicalIF":1.3,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11452064/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142299209","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}
Daniele Silva Souza Carreira, Carolina Emy Sato, Waléria Borges da Silva, Thereza Cristina Borio Dos Santos Calmon de Bittencourt, Silvia Lima Costa, Rosângela Soares Uzêda
{"title":"In vitro anti-parasitic effect of the alkaloids harmaline and piperine on Toxoplasma gondii.","authors":"Daniele Silva Souza Carreira, Carolina Emy Sato, Waléria Borges da Silva, Thereza Cristina Borio Dos Santos Calmon de Bittencourt, Silvia Lima Costa, Rosângela Soares Uzêda","doi":"10.1590/S1984-29612024053","DOIUrl":"10.1590/S1984-29612024053","url":null,"abstract":"<p><p>Toxoplasma gondii is a coccidian protozoan of zoonotic importance that causes toxoplasmosis. Although the current treatments for toxoplasmosis may be associated with adverse effects and limited efficacy for different biological forms of the parasite, evidence suggests that alkaloid molecules such as harmaline and piperine exhibit antiparasitic effects against protozoa parasites. This investigation aimed to evaluate the in vitro effect of harmaline and piperine against T. gondii tachyzoites in infected Vero cell cultures. After 24 hours of host cell infection, the cultures were treated with harmaline or piperine (0.49 to 15.63 µg/mL). Negative and positive controls were RPMI/DMSO (0.1%) and sulfadiazine (200 µg/mL). Harmaline significantly reduced parasite multiplication by 20% compared to the negative control, while piperine decreased between 55.56% and 88.89% in a dose-dependent manner. According to an intracellular parasite proportion scale, it was observed that the Vero cells with low or moderate parasitic proliferation were more prevalent after the alkaloid treatment. The study demonstrated that the alkaloids had antiparasitic effects on T. gondii, with piperine being the most effective. Additional studies must be carried out to clarify other aspects of the action of the alkaloids on parasites.</p>","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"33 3","pages":"e001824"},"PeriodicalIF":1.3,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11452066/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142299210","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}
Walter Franklin Bernardino Leão Filho, Viviane Melo Coelho Barros, Eduarda Viana Mafra Cardoso, Flávia Silva Damasceno, Juaci Vitória Malaquias, David Germano Gonçalves Schwarz, Abelardo Silva-Júnior, Wagnner José Nascimento Porto
{"title":"Dirofilaria immitis in dogs from the coastal tourist region of the state of Alagoas, Brazil.","authors":"Walter Franklin Bernardino Leão Filho, Viviane Melo Coelho Barros, Eduarda Viana Mafra Cardoso, Flávia Silva Damasceno, Juaci Vitória Malaquias, David Germano Gonçalves Schwarz, Abelardo Silva-Júnior, Wagnner José Nascimento Porto","doi":"10.1590/S1984-29612024055","DOIUrl":"10.1590/S1984-29612024055","url":null,"abstract":"<p><p>Canine dirofilariasis, caused by Dirofilaria immitis, is prevalent worldwide. However, the frequency of canine infection in the state of Alagoas, Brazil is scarcely unknown. This study aimed to evaluate the frequency of D. immitis infection in dogs from the coastal municipalities of Alagoas and analyze the risk factors associated with the infection. A cross-sectional study was performed using 426 dogs of different breeds and sex distributed across 15 coastal municipalities in the state of Alagoas. Blood samples were collected from each dog and analyzed for circulating microfilariae and free D. immitis antigens. To investigate the risk factors associated with D. immitis infection, we collected information on dog environments using an epidemiological questionnaire. The results revealed that 12.7% of dogs tested positive for D. immitis. Dogs with travel history were 3.52 times more likely to be infected. Thus, infected dogs in the coastal region of Alagoas should be regularly monitored and the public health system should plan strategies to control this zoonotic disease.</p>","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"33 3","pages":"e006824"},"PeriodicalIF":1.3,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11452065/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142299208","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}
Jeferson Adriano E Silva Assunção, Daniel de Brito Machado, Jessica Sales Felisberto, Douglas Siqueira de Almeida Chaves, Diefrey Ribeiro Campos, Yara Peluso Cid, Nicholas John Sadgrove, Ygor Jessé Ramos, Davyson de Lima Moreira
{"title":"Insecticidal activity of essential oils from Piper aduncum against Ctenocephalides felis felis: a promising approach for flea control.","authors":"Jeferson Adriano E Silva Assunção, Daniel de Brito Machado, Jessica Sales Felisberto, Douglas Siqueira de Almeida Chaves, Diefrey Ribeiro Campos, Yara Peluso Cid, Nicholas John Sadgrove, Ygor Jessé Ramos, Davyson de Lima Moreira","doi":"10.1590/S1984-29612024050","DOIUrl":"10.1590/S1984-29612024050","url":null,"abstract":"<p><p>Piper aduncum L., a Brazilian medicinal plant, is known for its bioactive properties, including repellent and insecticidal effects. This study investigated the insecticidal potential of essential oils (EOs) from P. aduncum, collected during the dry and rainy seasons, against fleas (Ctenocephalides felis felis Bouché, 1835) in egg and adult stages. The EOs were obtained by hydrodistillation using a modified Clevenger apparatus for 2 h. Qualitative and quantitative analysis were performed via gas chromatography. The findings revealed that dillapiole was the predominant substance in both EOs, accounting for 77.6% (rainy) and 85.5% (dry) of the EOs. These EOs exhibited high efficacy against the parasite C. felis felis, resulting in 100% egg mortality at a concentration of 100 μg/mL and 100% mortality for adult fleas starting from 1,000 μg/mL. Dillapiole standard was also effective but at a relatively high concentration. This finding suggested that EOs from P. aduncum exhibit cytotoxicity against these pests and might hold potential for commercial production, offering practical applications for such bioprospecting. This study uniquely revealed that the EOs from P. aduncum, which is rich in dillapiole, demonstrated pulicidal activity against the parasite C. felis felis, particularly in inhibiting the hatching of the eggs of these parasites.</p>","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"33 3","pages":"e007624"},"PeriodicalIF":1.3,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11452071/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142299211","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}
Melissa Querido Cárdenas, Marciara Lopes Silva, Diego Carvalho Viana, Simone Chinicz Cohen, Felipe Polivanov Ottoni
{"title":"Nematofauna of Bryconops cf. affinis (Characiformes, Iguanodectidae) and Saxatilia brasiliensis (Cichliformes, Cichlidae) from the Munim River basin, Northeastern Brazil.","authors":"Melissa Querido Cárdenas, Marciara Lopes Silva, Diego Carvalho Viana, Simone Chinicz Cohen, Felipe Polivanov Ottoni","doi":"10.1590/S1984-29612024051","DOIUrl":"10.1590/S1984-29612024051","url":null,"abstract":"<p><p>Populations of freshwater species have been declining rapidly and species are becoming extinct. Thus, understanding freshwater species distribution, trends and patterns is required. The Munim River basin is situated in a region with a phytogeographic interface between the Amazon and Cerrado biomes. Although the Munim basin ichthyofauna is currently relatively well-known, data on its helminth fauna is scarce. The present study aimed to characterize the nematofauna of Bryconops cf. affinis (Günther) and Saxatilia brasiliensis (Bloch) from two different localities in the middle section of the Munim River, and thus to contribute to the knowledge of biodiversity in this region. Specimens of Bryconops cf. affinis were parasitized with the nematodes Procamallanus (Spirocamallanus) krameri (Petter, 1974) and \"Porrocaecum-like\" species (larvae) in both localities. Saxatilia brasiliensis presented the nematodes P. (S.) krameri, Pseudoproleptus sp. (larvae), Cucullanus sp. and Procamallanus sp. (larvae). Procamallanus (S.) krameri was found parasitizing S. brasiliensis only from the Feio stream. Morphometric data and parasitological parameters are given. The present study provides the first record of nematodes for B. cf. affinis and for S. brasiliensis contributing to the knowledge of the helminth fauna of freshwater fishes from locations that have not yet been studied, such as the Munim River basin.</p>","PeriodicalId":48990,"journal":{"name":"Revista Brasileira De Parasitologia Veterinaria","volume":"33 3","pages":"e011224"},"PeriodicalIF":1.3,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11452063/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142299223","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}