Ana Rita Baptista da Silva, M. Tavares-Dias, Joelma dos Santos Fernandes
This study describes the parasitic fauna and the host-parasite relationship of Semaprochilodus insignis Jardine, 1841 from Coari Lake, a tributary of the middle Solimoes River (state of Amazonas, Brazil) in Central Amazonia. Of 56 fish examined, 23.2% had gills parasitized by Gyrodactylus Gemini Ferraz, Shinn & Sommerville 1994 (Monogenoidea: Gyrodactylidae), and the intestine by Procamallanus inopinatus Travassos, Artigas & Pereira, 1928 (Nematoda: Camallanidae). The highest rates of infection were caused by G. gemini. Even though the relative condition factor (Kn) was not affected by parasitism, there was a positive correlation between the intensity of both helminthes, the Kn and the total length of the hosts. This is the first report on the parasitic fauna of S. insignis with occurrences of G. gemini and P. inopinatus for this Neotropical host fromthe Amazonia.
{"title":"HELMINTOS PARÁSITOS DE SEMAPROCHILODUS INSIGNIS JARDINE, 1841 (OSTEICHTHYES: PROCHILODONTIDAE) DEL CENTRO DE LA AMAZONÍA (BRASIL), Y SU RELACIÓN CON EL HOSPEDERO","authors":"Ana Rita Baptista da Silva, M. Tavares-Dias, Joelma dos Santos Fernandes","doi":"10.24039/RNH2011521077","DOIUrl":"https://doi.org/10.24039/RNH2011521077","url":null,"abstract":"This study describes the parasitic fauna and the host-parasite relationship of Semaprochilodus insignis Jardine, 1841 from Coari Lake, a tributary of the middle Solimoes River (state of Amazonas, Brazil) in Central Amazonia. Of 56 fish examined, 23.2% had gills parasitized by Gyrodactylus Gemini Ferraz, Shinn & Sommerville 1994 (Monogenoidea: Gyrodactylidae), and the intestine by Procamallanus inopinatus Travassos, Artigas & Pereira, 1928 (Nematoda: Camallanidae). The highest rates of infection were caused by G. gemini. Even though the relative condition factor (Kn) was not affected by parasitism, there was a positive correlation between the intensity of both helminthes, the Kn and the total length of the hosts. This is the first report on the parasitic fauna of S. insignis with occurrences of G. gemini and P. inopinatus for this Neotropical host fromthe Amazonia.","PeriodicalId":328487,"journal":{"name":"Neotropical helminthology","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133405672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The present study was done, from May to August 2006 in Pucchun, a town located in Arequipa-Peru, Camana Province, Mariscal Caceres District. One fecal sample and epidemiological dates were obtained from each of Pucchun's Primary School students. Fecal samples were processed by modified Teleman technique and fast sedimentation. 92.68% of samples had one or more intestinal parasites, predominantly protozoa: Entamoeba histolytica/ Entamoeba dispar (33.17%), Giardia intestinalis (31.71%), Hymenolepis nana (47.17%), Diphyllobothrium pacificum (0.49%) and Fasciola hepatica (0.49%). Polyparasitism (42.63%) was more frequently encountered. Non pathogen parasites were also present and included Entamoeba coli (72.68%), Blastocystis hominis (48.29%), Endolimax nana (35.61%), Iodamoeba butschlii(23.90%), and Chilomastix mesnilli (16.58%). Epidemiological factors found were: age between 8 and 10 years, inadequate form and place of rubbish elimination, presence of rodents and vectors in houses and eating uncooked vegetables.
{"title":"Prevalencia y epidemiología del parasitismo intestinal en escolares de nivel primario de Pucchún, Camaná, Arequipa, Perú, 2006","authors":"Liz Casquina-Guere, Elí Martínez-Barrios","doi":"10.24039/RNH2011521082","DOIUrl":"https://doi.org/10.24039/RNH2011521082","url":null,"abstract":"The present study was done, from May to August 2006 in Pucchun, a town located in Arequipa-Peru,\u0000Camana Province, Mariscal Caceres District. One fecal sample and epidemiological dates were\u0000obtained from each of Pucchun's Primary School students. Fecal samples were processed by modified\u0000Teleman technique and fast sedimentation. 92.68% of samples had one or more intestinal parasites,\u0000predominantly protozoa: Entamoeba histolytica/ Entamoeba dispar (33.17%), Giardia intestinalis\u0000(31.71%), Hymenolepis nana (47.17%), Diphyllobothrium pacificum (0.49%) and Fasciola hepatica\u0000(0.49%). Polyparasitism (42.63%) was more frequently encountered. Non pathogen parasites were also\u0000present and included Entamoeba coli (72.68%), Blastocystis hominis (48.29%), Endolimax nana\u0000(35.61%), Iodamoeba butschlii(23.90%), and Chilomastix mesnilli (16.58%). Epidemiological factors\u0000found were: age between 8 and 10 years, inadequate form and place of rubbish elimination, presence of\u0000rodents and vectors in houses and eating uncooked vegetables.","PeriodicalId":328487,"journal":{"name":"Neotropical helminthology","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116222354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Humboldt, definido como “a Large Marine Ecosystem”, se extiende a lo largo de la Costa Occidental de América del Sur, desde la zona Centro Sur de Chile (app. 42°S) hasta el Norte del Perú (4°S). Es uno de los mayores sistemas de afloramiento del mundo y responsable por los extraordinariamente altos niveles de producción. Es considerado un sistema clase 1, altamente 2 productivo (>300 g·C/m -año). Los altos valores de producción primaria de este sistema soportan las más grandes pesquerías a nivel mundial (Alheit & Bernal, 1993). Alrededor del 18-20% de las capturas mundiales provienen de este sistema, específicamente de pelágicos pequeños como anchoveta (Engraulis ringens Jenyns, 1842), sardina (Sardinops sagax (Jenyns, 1842)) y jurel (Trachurus murphyi Nichols, 1920). De un sistema de estas características deberá esperarse una alta diversidad biológica.
{"title":"Ictioparasitología marina en el sistema de afloramiento de la corriente de Humboldt: desafíos para la revista Neotropical Helminthology","authors":"M. Oliva, José L. Luque","doi":"10.24039/RNH2010421095","DOIUrl":"https://doi.org/10.24039/RNH2010421095","url":null,"abstract":"Humboldt, definido como “a Large Marine Ecosystem”, se extiende a lo largo de la Costa Occidental de América del Sur, desde la zona Centro Sur de Chile (app. 42°S) hasta el Norte del Perú (4°S). Es uno de los mayores sistemas de afloramiento del mundo y responsable por los extraordinariamente altos niveles de producción. Es considerado un sistema clase 1, altamente 2 productivo (>300 g·C/m -año). Los altos valores de producción primaria de este sistema soportan las más grandes pesquerías a nivel mundial (Alheit & Bernal, 1993). Alrededor del 18-20% de las capturas mundiales provienen de este sistema, específicamente de pelágicos pequeños como anchoveta (Engraulis ringens Jenyns, 1842), sardina (Sardinops sagax (Jenyns, 1842)) y jurel (Trachurus murphyi Nichols, 1920). De un sistema de estas características deberá esperarse una alta diversidad biológica.","PeriodicalId":328487,"journal":{"name":"Neotropical helminthology","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128044836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Samantha A. Seixas, J. F. R. Amato, Suzana B. Amato
Temnocephala longivaginata sp. n., an ectosymbiont on Dilocarcinus septemdentatus (Herbst, 1783), is described from crabs in the State of Para, Brazilian Amazonia. Fifty crabs were collected from the Rio Peixe-Boi, Municipality of Peixe-Boi. Dilocarcinus septemdentatus is the type host of Temnocephala microdactyla Monticelli, 1903, a species with a precarious original description, but redescribed on two other occasions from different hosts: Sylviocarcinus australis Magalhaes & Turkay, 1996 and Dilocarcinus pagei Stimpson, 1861. The new species is most similar to Temnocephala pignalberiae Dioni, 1967, but differs by having the following characters: 1. cirrus with a circle of sclerites in the distal portion of the introvert, followed by a smooth portion (without spines or ridges); 2. proximal, inner portion of the introvert with longitudinal ridges; 3. vesicula 'intermedia' long, replacing the seminal receptacles; 4. vagina long, with a widening of its distal portion, near the asymmetrical vaginal sphincter; and 5. small and 'shoe sole' shaped dorsolateral 'excretory' syncytial epidermal plates. Prior to the present study, all species of Temnocephala were shown to have the cirrus' introvert either smooth or with spines. Ridges in the inner wall of the introvert and a circle of sclerites are here recorded for the first time in Temnocephalidae.
{"title":"NUEVA ESPECIE DE TEMNOCEPHALA BLANCHARD (PLATYHELMINTHES, TEMNOCEPHALIDA) ECTOSIMBIONTE EN DILOCARCINUS SEPTEMDENTATUS (DECAPODA, TRICHODACTYLIDAE) DE LA AMAZONÍA BRASILERA","authors":"Samantha A. Seixas, J. F. R. Amato, Suzana B. Amato","doi":"10.24039/RNH2011521074","DOIUrl":"https://doi.org/10.24039/RNH2011521074","url":null,"abstract":"Temnocephala longivaginata sp. n., an ectosymbiont on Dilocarcinus septemdentatus (Herbst, 1783), is described from crabs in the State of Para, Brazilian Amazonia. Fifty crabs were collected from the Rio Peixe-Boi, Municipality of Peixe-Boi. Dilocarcinus septemdentatus is the type host of Temnocephala microdactyla Monticelli, 1903, a species with a precarious original description, but redescribed on two other occasions from different hosts: Sylviocarcinus australis Magalhaes & Turkay, 1996 and Dilocarcinus pagei Stimpson, 1861. The new species is most similar to Temnocephala pignalberiae Dioni, 1967, but differs by having the following characters: 1. cirrus with a circle of sclerites in the distal portion of the introvert, followed by a smooth portion (without spines or ridges); 2. proximal, inner portion of the introvert with longitudinal ridges; 3. vesicula 'intermedia' long, replacing the seminal receptacles; 4. vagina long, with a widening of its distal portion, near the asymmetrical vaginal sphincter; and 5. small and 'shoe sole' shaped dorsolateral 'excretory' syncytial epidermal plates. Prior to the present study, all species of Temnocephala were shown to have the cirrus' introvert either smooth or with spines. Ridges in the inner wall of the introvert and a circle of sclerites are here recorded for the first time in Temnocephalidae.","PeriodicalId":328487,"journal":{"name":"Neotropical helminthology","volume":"236 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116174912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Elí Martínez-Barrios, Luis Cerpa-Gonzales, Manuel Liu-Cam
Giardiasisis a cosmopolitan infection, it's prevalence around the world vary between 0.5 and 50%. Its prevalence averages about 15% in Latin America's rural population. Because there is very little information on the prevalence of Giardia infection in our city, we decided to investigate giardiasis prevalence in preschool children of Tiabaya`s district kindergartens, Arequipa province, Peru. Children`s parents were interviewed and fecal samples were collected from 104 children. Samples were processed by modified Teleman technique. The prevalence of Giardia intestinaliswas 25.96%; 70.37% of samples had a single parasite and 29.63% had other parasites. Most of the cases came from rural places with inadequate rubbish elimination. Diarrhea and appetite diminution were the most common symptoms.
{"title":"Prevalencia de Giardiasis en guarderías infantiles de Tiabaya – Arequipa, Perú, 2006","authors":"Elí Martínez-Barrios, Luis Cerpa-Gonzales, Manuel Liu-Cam","doi":"10.24039/RNH2011521083","DOIUrl":"https://doi.org/10.24039/RNH2011521083","url":null,"abstract":"Giardiasisis a cosmopolitan infection, it's prevalence around the world vary between 0.5 and 50%. Its\u0000prevalence averages about 15% in Latin America's rural population. Because there is very little\u0000information on the prevalence of Giardia infection in our city, we decided to investigate giardiasis\u0000prevalence in preschool children of Tiabaya`s district kindergartens, Arequipa province, Peru.\u0000Children`s parents were interviewed and fecal samples were collected from 104 children. Samples were\u0000processed by modified Teleman technique. The prevalence of Giardia intestinaliswas 25.96%; 70.37%\u0000of samples had a single parasite and 29.63% had other parasites. Most of the cases came from rural\u0000places with inadequate rubbish elimination. Diarrhea and appetite diminution were the most common\u0000symptoms.","PeriodicalId":328487,"journal":{"name":"Neotropical helminthology","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114333883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Iannacone, José Avila Peltroche, Stefany Rojas Perea, Marysabel Salas Sierralta, Karen Neira Cruzado, Rebeca Palomares Torres, Sofía Valdivia Alarcón, A. P. Silva, Veronica Vargas, Valeria Ferrario Bazalar
Thirty-six specimens of Rhinobatos planiceps (Garman, 1880) "Pacific guitar fish" were acquired from the Chorrillos Fishmarket, Lima, Peru between September 2009 and August 2010 to assess the population dynamics of parasitic metazoa. Of the fish examined, 14 were females and 22 were males. The fish had an average total length of 85.0 ± 19.3 cm (27 to 125). Metazoan parasites were collected and counted using standard parasitological protocols. The parasite assemblage recorded a higher percentage of endoparasites than ectoparasites. All hosts showed infection with at least one parasitic species. Ten species were found with the following prevalence of infection and mean abundance: three species of Monogenea: Anoplocotyloides papillatus (41.6% and 1.1), A. chorrillensis (30.5% and 0.5) and Rhinobatonchocotyle pacifica (63.8% and 4.1), three species of cestodes: Rhinebothrium rhinobati (8.3% and 0.1), Prochristianella heteracantha (11.1% and 0 , 1) and Acanthobothrium olseni (27.7% and 0.6), one nematode Proleptus carvajali (80.5% and 148), one hirudinean Stibarobdella moorei (5.5% and 0.1), and finally two species of copepods Eudactylina peruensis (2.7% and 0.02) and Ommatokoita elongata (13.8% and 0.2). The specific importance index showed that P. carvajali presented the highest value and is considered a core species in the parasite community. The total length was not related to the prevalence and abundance of parasitic infection, except for a negative relationship with the prevalence of the copepod O. elongata. A differential pattern in the mean abundance of infection between parasitized and unparasitized fish with A. papillatus and R. pacifica was observed. The interactivity indexes (CC ) for ectoparasites (29.9%) and endoparasites (32.8%) of R. planiceps 50 show that communities are interactive.
{"title":"DINÁMICA POBLACIONAL DE LOS PARÁSITOS METAZOOS DEL PEZ GUITARRA DEL PACÍFICO RHINOBATOS PLANICEPS (BATOIDEA: RAJIFORMES) DE LA ZONA COSTERA MARINA DE LIMA, PERÚ","authors":"J. Iannacone, José Avila Peltroche, Stefany Rojas Perea, Marysabel Salas Sierralta, Karen Neira Cruzado, Rebeca Palomares Torres, Sofía Valdivia Alarcón, A. P. Silva, Veronica Vargas, Valeria Ferrario Bazalar","doi":"10.24039/RNH2011521084","DOIUrl":"https://doi.org/10.24039/RNH2011521084","url":null,"abstract":"Thirty-six specimens of Rhinobatos planiceps (Garman, 1880) \"Pacific guitar fish\" were acquired from\u0000the Chorrillos Fishmarket, Lima, Peru between September 2009 and August 2010 to assess the\u0000population dynamics of parasitic metazoa. Of the fish examined, 14 were females and 22 were males.\u0000The fish had an average total length of 85.0 ± 19.3 cm (27 to 125). Metazoan parasites were collected\u0000and counted using standard parasitological protocols. The parasite assemblage recorded a higher\u0000percentage of endoparasites than ectoparasites. All hosts showed infection with at least one parasitic\u0000species. Ten species were found with the following prevalence of infection and mean abundance: three\u0000species of Monogenea: Anoplocotyloides papillatus (41.6% and 1.1), A. chorrillensis (30.5% and 0.5)\u0000and Rhinobatonchocotyle pacifica (63.8% and 4.1), three species of cestodes: Rhinebothrium rhinobati\u0000(8.3% and 0.1), Prochristianella heteracantha (11.1% and 0 , 1) and Acanthobothrium olseni (27.7%\u0000and 0.6), one nematode Proleptus carvajali (80.5% and 148), one hirudinean Stibarobdella moorei\u0000(5.5% and 0.1), and finally two species of copepods Eudactylina peruensis (2.7% and 0.02) and\u0000Ommatokoita elongata (13.8% and 0.2). The specific importance index showed that P. carvajali\u0000presented the highest value and is considered a core species in the parasite community. The total length\u0000was not related to the prevalence and abundance of parasitic infection, except for a negative relationship\u0000with the prevalence of the copepod O. elongata. A differential pattern in the mean abundance of\u0000infection between parasitized and unparasitized fish with A. papillatus and R. pacifica was observed.\u0000The interactivity indexes (CC ) for ectoparasites (29.9%) and endoparasites (32.8%) of R. planiceps 50\u0000show that communities are interactive.","PeriodicalId":328487,"journal":{"name":"Neotropical helminthology","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124071770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Malacological surveys were carried out in lakes located near the Sao Francisco River or its tributaries in Iguatama, Minas Gerais, Brazil, between July 2009 and September 2010. Of 2.609 specimens of Biomphalaria straminea (Dunker, 1848) collected, 14 (0.54%) were infected by amphistomecercariae. Metacercariae obtained in solid subtract were used to perform experimental infection of AKR/J strain of mice. It was verified the presence of eggs of the parasite in the feces of the mice 30 days after infection. Adult parasites recovered from the intestinal caecum were identified as Zygocotyle lunata (Diesing, 1836). This is the first report of Z. lunata in B. straminea from Brazil
{"title":"Biomphalaria straminea (Mollusca: Planorbidae) como hospedeiro intermediário de Zygocotyle lunata (Trematoda: Zygocotylidae) no Brasil","authors":"F. Barbosa, H. A. Pinto, A. L. Melo","doi":"10.24039/RNH2011521081","DOIUrl":"https://doi.org/10.24039/RNH2011521081","url":null,"abstract":"Malacological surveys were carried out in lakes located near the Sao Francisco River or its tributaries in Iguatama, Minas Gerais, Brazil, between July 2009 and September 2010. Of 2.609 specimens of Biomphalaria straminea (Dunker, 1848) collected, 14 (0.54%) were infected by amphistomecercariae. Metacercariae obtained in solid subtract were used to perform experimental infection of AKR/J strain of mice. It was verified the presence of eggs of the parasite in the feces of the mice 30 days after infection. Adult parasites recovered from the intestinal caecum were identified as Zygocotyle lunata (Diesing, 1836). This is the first report of Z. lunata in B. straminea from Brazil","PeriodicalId":328487,"journal":{"name":"Neotropical helminthology","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122851174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
George Argota-Pérez, Rigoberto Fimia-Duarte, J. Iannacone
The larval control of mosquitoes continues to be a priority for health authorities and despite the application of bioregulation for several decades, biological control seems to be unknown as a sustainable tool. The objective of the note to the editor was to indicate the extraordinary capacity for the larval biocontrol of mosquitoes in the species Gambusia punctata Poey, 1854. Yes, under natural conditions of contamination G. punctata shows its predatory effectiveness of mosquito larvae, then in those places that such contamination can be reversible, why is a chemical control applied to quickly supply this natural response, since science has recognized some positive effects of larvicides, but in the same way, the consequences not only affect the environment where it lives G. punctata, but to human health itself when exposed to water resources contaminated with non-natural products.
{"title":"CAPACIDAD EXTRAORDINARIA PARA EL BIOCONTROL LARVAL DE MOSQUITOS EN LA ESPECIE GAMBUSIA PUNCTATA, POEY, 1854","authors":"George Argota-Pérez, Rigoberto Fimia-Duarte, J. Iannacone","doi":"10.24039/RNH20211511053","DOIUrl":"https://doi.org/10.24039/RNH20211511053","url":null,"abstract":"The larval control of mosquitoes continues to be a priority for health authorities and despite the application of bioregulation for several decades, biological control seems to be unknown as a sustainable tool. The objective of the note to the editor was to indicate the extraordinary capacity for the larval biocontrol of mosquitoes in the species Gambusia punctata Poey, 1854. Yes, under natural conditions of contamination G. punctata shows its predatory effectiveness of mosquito larvae, then in those places that such contamination can be reversible, why is a chemical control applied to quickly supply this natural response, since science has recognized some positive effects of larvicides, but in the same way, the consequences not only affect the environment where it lives G. punctata, but to human health itself when exposed to water resources contaminated with non-natural products.","PeriodicalId":328487,"journal":{"name":"Neotropical helminthology","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121914312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
George Argota-Pérez, José Iannacone, Rigoberto Fimia-Duarte
The aim of the study was to measure brain growth in the larval control species Gambusia punctata Poey, 1854. The study was carried out in March 2021 and corresponded to two exposure stations in the lower part of the Almendares River (Havana, Cuba). For the sampling, a professional rectangular 60 x 50 x 45cm jamo was used and mesh size of 0.5cm. Eighteen male individuals (station A = 11, station B = 7) well identified by their gonopod were sampled. For the extraction of the brain, the individuals were placed in a ventral position where the containment was by means of a smooth clamp. With another bidentate dissection forceps, the cephalic region was peeled off until the brain was visualized, where its extraction was carried out with new smooth forceps until conization was left in the anatomical-cerebral region. Statistically significant differences were found in the brain growth of individuals between sampling stations A and B. It is concluded that, it is necessary to deepen in various analyzes to demonstrate, the hypothesis that the greater growth of the brain in males of the larval bioregulatory species G. punctata obeys the criterion of environmental tolerance, since from the base of empirical methods by observation and measurements that were carried out, it only meant a preliminary knowledge.
这项研究的目的是测量1854年的对照种Gambusia punctata Poey幼虫的大脑发育情况。该研究于2021年3月进行,与Almendares河下游(古巴哈瓦那)的两个暴露站相对应。采样使用60 x 50 x 45cm的专业矩形板,网目尺寸为0.5cm。经性腺鉴定的雄虫18只(A站11只,B站7只)。为了提取大脑,个体被放置在腹侧位置,那里有一个光滑的钳子。使用另一个双齿解剖钳,剥离头侧区域,直到大脑可见,在那里,用新的光滑钳进行提取,直到解剖大脑区域留下锥形。A、b两个采样点的个体脑发育差异有统计学意义。因此,从观察和测量的经验方法来看,有必要在各种分析中进一步深化,以证明生物调节物种斑蝽幼虫雄性脑较大生长符合环境耐受性标准的假设,这只是初步的认识。
{"title":"¿EL CRECIMIENTO CEREBRAL SERÁ UNA ADAPTACIÓN AL CRITERIO DE TOLERANCIA AMBIENTAL EN LA ESPECIE CONTROLADORA LARVARIA GAMBUSIA PUNCTATA POEY, 1854?","authors":"George Argota-Pérez, José Iannacone, Rigoberto Fimia-Duarte","doi":"10.24039/RNH20211511052","DOIUrl":"https://doi.org/10.24039/RNH20211511052","url":null,"abstract":"The aim of the study was to measure brain growth in the larval control species Gambusia punctata Poey, 1854. The study was carried out in March 2021 and corresponded to two exposure stations in the lower part of the Almendares River (Havana, Cuba). For the sampling, a professional rectangular 60 x 50 x 45cm jamo was used and mesh size of 0.5cm. Eighteen male individuals (station A = 11, station B = 7) well identified by their gonopod were sampled. For the extraction of the brain, the individuals were placed in a ventral position where the containment was by means of a smooth clamp. With another bidentate dissection forceps, the cephalic region was peeled off until the brain was visualized, where its extraction was carried out with new smooth forceps until conization was left in the anatomical-cerebral region. Statistically significant differences were found in the brain growth of individuals between sampling stations A and B. It is concluded that, it is necessary to deepen in various analyzes to demonstrate, the hypothesis that the greater growth of the brain in males of the larval bioregulatory species G. punctata obeys the criterion of environmental tolerance, since from the base of empirical methods by observation and measurements that were carried out, it only meant a preliminary knowledge.","PeriodicalId":328487,"journal":{"name":"Neotropical helminthology","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122914599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fasciolosis is a zoonosis caused by the parasite Fasciola hepatica Linnaeus, 1758, which, in order to develop its biological cycle, requires an intermediate host (gastropod mollusk, Lymnaeidae), and a definitive host (mammals, including man). This disease has caused annual economic losses of $ 200 M in the world. The objective of the present investigation was; to identify the prevalence of F. hepatica in the bovine slaughter centers, to determine the economic losses, and to identify the agroecological characteristics where the intermediate hosts develop, in the province of Imbabura, Ecuador. A prevalence of F. hepatica of 10,9% was identified, where the Canton Otavalo presented 190 positive samples (19,7%), being considered the point with the highest prevalence within the study. The positive bovines were 102 males (26,9%) and 277 females (73,1%), which belong to the Mestizo (53,5%), Holstein (42%) and Normando (4,5%) biotype. 78,6% being over two years and 21,4% under two years. There was an annual economic loss of $ 69.547,5 US dollars. The 20 biotopes sampled remained within the average values; distance from the populated center 0,7 kilometers, area of 42,8 m2; 31 mollusks per biotope, soil pH 7,1; water depth 2,3 cm; altitude from 2,019 to 2,772 meters above sea level; temperature of 20 ° C and relative humidity of 74%. The mollusks were located in ditches (55%), puddles (25%), swamps (10%), streams and the ground (5%), with the presence of kikuyo (Pennisetum clandestinum Hochst. Ex Chiov, 1903) and cattails (Schoenoplectus californicus CA Mey., 1850) as dominant species. The province of Imbabura has a moderate prevalence in terms of epidemiology due to fasciolosis, it is confirmed that these areas present an ecosystem suitable for the development of the biological cycle of fasciolosis.
{"title":"PREVALENCIA DE FASCIOLOSIS (FASCIOLA HEPATICA LINNAEUS, 1758) EN LAS EMPRESAS DE RASTRO BOVINO DE LA PROVINCIA DE IMBABURA, ECUADOR","authors":"Jeferson Cacuango-Quishpe, Vicente Arteaga-Cadena, Ángel Villavicencio-Abril, Rocío Guamán-Guamán, Santiago Ulloa-Cortázar, Edison Medina-Suescun","doi":"10.24039/RNH20211511051","DOIUrl":"https://doi.org/10.24039/RNH20211511051","url":null,"abstract":"Fasciolosis is a zoonosis caused by the parasite Fasciola hepatica Linnaeus, 1758, which, in order to develop its biological cycle, requires an intermediate host (gastropod mollusk, Lymnaeidae), and a definitive host (mammals, including man). This disease has caused annual economic losses of $ 200 M in the world. The objective of the present investigation was; to identify the prevalence of F. hepatica in the bovine slaughter centers, to determine the economic losses, and to identify the agroecological characteristics where the intermediate hosts develop, in the province of Imbabura, Ecuador. A prevalence of F. hepatica of 10,9% was identified, where the Canton Otavalo presented 190 positive samples (19,7%), being considered the point with the highest prevalence within the study. The positive bovines were 102 males (26,9%) and 277 females (73,1%), which belong to the Mestizo (53,5%), Holstein (42%) and Normando (4,5%) biotype. 78,6% being over two years and 21,4% under two years. There was an annual economic loss of $ 69.547,5 US dollars. The 20 biotopes sampled remained within the average values; distance from the populated center 0,7 kilometers, area of 42,8 m2; 31 mollusks per biotope, soil pH 7,1; water depth 2,3 cm; altitude from 2,019 to 2,772 meters above sea level; temperature of 20 ° C and relative humidity of 74%. The mollusks were located in ditches (55%), puddles (25%), swamps (10%), streams and the ground (5%), with the presence of kikuyo (Pennisetum clandestinum Hochst. Ex Chiov, 1903) and cattails (Schoenoplectus californicus CA Mey., 1850) as dominant species. The province of Imbabura has a moderate prevalence in terms of epidemiology due to fasciolosis, it is confirmed that these areas present an ecosystem suitable for the development of the biological cycle of fasciolosis.","PeriodicalId":328487,"journal":{"name":"Neotropical helminthology","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134007623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}