Base de dados : MEDLINE
Pesquisa : B01.050.500.500.294.100.275.570 [Categoria DeCS]
Referências encontradas : 167 [refinar]
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  1 / 167 MEDLINE  
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[PMID]:27383003
[Au] Autor:Rusconi JM; Camino NB; Achinelly MF
[Ad] Endereço:Centro de Estudios Parasitológicos y de Vectores, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina.
[Ti] Título:Nematodes (Mermithidae) parasitizing grasshoppers (Orthoptera: Acrididae) in the Pampean region, Argentina.
[So] Source:Braz J Biol;77(1):12-15, 2017 Mar.
[Is] ISSN:1678-4375
[Cp] País de publicação:Brazil
[La] Idioma:eng
[Ab] Resumo:This work provides the results of a survey of entomonematodes parasites of grasshoppers in grasslands of the Pampean Region, Argentina. Nymphs of Staurorhectus longicornis Giglio-Tos, Laplatacris dispar Rhen, 1939, Dichroplus elongatus Giglio-Tos, 1894 and Metaleptea brevicornis (L.) (Orthoptera: Acrididae) were collected. Mermithidae was the only family registered with seven species: Agamermis decaudata Cobb, Steiner and Christie, 1923, Amphimermis bonaerensis Miralles and Camino, 1983, Amphimermis dichroplusi Camino and Lange, 1997, Amphimermis ronderosi Camino and Lange, 1997, Hexamermis coclhearius Stock and Camino, 1992, Hexamermis ovistriata Stock and Camino, 1992, and Longimermis acridophila Camino and Stock, 1989. The values of parasitism ranged between 1-12%, and intensity not overcome the number of 5.0 nematodes per larva. The nematodes observed showed specificity, not registering the same species of parasite in more than one host species. The Pampean region constituted an area with high diversity of mermithids where new species could be consider as bioregulator agents of this troublesome insect pests in agricultural areas of Argentina.
[Mh] Termos MeSH primário: Gafanhotos/parasitologia
Mermithoidea/isolamento & purificação
[Mh] Termos MeSH secundário: Animais
Argentina
Larva
Ninfa/parasitologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170424
[Lr] Data última revisão:
170424
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160708
[St] Status:MEDLINE


  2 / 167 MEDLINE  
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[PMID]:27545022
[Au] Autor:Maure F; Poulin R
[Ad] Endereço:Department of Zoology, University of Otago, PO Box 56, Dunedin, 9054, New Zealand.
[Ti] Título:Inequalities in body size among mermithid nematodes parasitizing earwigs.
[So] Source:Parasitol Res;115(12):4471-4475, 2016 Dec.
[Is] ISSN:1432-1955
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Variation among body sizes of adult parasitic worms determines the relative genetic contribution of individuals to the next generation as it affects the effective parasite population size. Here, we investigate inequalities in body size and how they are affected by intensity of infection in Mermis nigrescens (Mermithidae: Nematoda) parasitizing the European earwig Forficula auricularia in New Zealand. Among a population of pre-adult worms prior to their emergence from the host, we observed only modest inequalities in body length; however, among worms sharing the same individual host, inequalities in body sizes decreased with increasing intensity of infection. Thus, the more worms occurred in a host, the more the second-longest, third-longest and even fourth-longest worms approached the longest worm in body length. This pattern, also known from another mermithid species, suggests that worms sharing the same host may have infected it roughly simultaneously, when the host encountered a clump of eggs in the environment. Thus, the life history and mode of infection of the parasite may explain the modest inequalities in the sizes achieved by pre-adult worms, which are lower than those reported for endoparasitic helminths of vertebrates.
[Mh] Termos MeSH primário: Insetos/parasitologia
Mermithoidea/crescimento & desenvolvimento
[Mh] Termos MeSH secundário: Animais
Tamanho Corporal
Feminino
Estágios do Ciclo de Vida
Masculino
Nova Zelândia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1706
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160823
[St] Status:MEDLINE


  3 / 167 MEDLINE  
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[PMID]:26809123
[Au] Autor:Muñoz-Muñoz F; Ramoneda J; Pagès N; Pujol N; Talavera S
[Ad] Endereço:Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia, Facultat de Biociències, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain. Electronic address: francesc.munozm@uab.cat.
[Ti] Título:Is the morphology of Culicoides intersexes parasitized by mermithid nematodes a parasite adaptation? A morphometric approach to Culicoides circumscriptus (Diptera: Ceratopogonidae).
[So] Source:J Invertebr Pathol;135:1-9, 2016 Mar.
[Is] ISSN:1096-0805
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Mermithidae is a family of endoparasitic nematodes known to cause intersexuality in arthropods. Intersexes of the genus Culicoides parasitized by mermithids have been the object of several studies aiming to describe their particular morphology. Culicoides intersexes are specimens with male genitalia and feminized sexually dimorphic structures, i.e. antennae, mouthparts and wings. To date, these specimens have only been described qualitatively and a quantitative approach supported by statistical analysis is lacking. Here we conduct morphometric analyses of sexually dimorphic structures in a sample of Culicoides circumscriptus that includes 34 intersexes with the aim of describing precisely the intersexual morphology. The morphology of antennae and the mouthparts was studied by multivariate statistical analysis of linear measures, and wing form by implementing geometric morphometrics techniques. While intersex wings proved to have a similar size to male wings, their shape was intermediate between males and females. However, when allometric shape variation was removed, the wing shape of intersexes was almost identical to that of females. The intersex antennae were morphometrically of the female type, especially when size variation was considered. In contrast, the measured mouthparts (the labrum and the third palpal segment) were halfway between males and females, even when body size was considered. Overall, the antennae and the wings showed a higher degree of feminization than the mouthparts. These findings indicate that the degree of feminization depends both on the morphological structure and on body size. Moreover, we propose that the feminization of the wings and antennae has an adaptive meaning for the parasite, which would favor female-like traits in order to access more easily its breeding sites, where the parasite has plenty of new hosts to infect. Female-like antennae would be beneficial to detect these sites, while having female-like wings would favor the host's capacity of dispersal to these sites.
[Mh] Termos MeSH primário: Ceratopogonidae/anatomia & histologia
Ceratopogonidae/parasitologia
Mermithoidea/fisiologia
[Mh] Termos MeSH secundário: Adaptação Fisiológica
Análise de Variância
Animais
Antenas de Artrópodes/anatomia & histologia
Transtornos do Desenvolvimento Sexual
Feminino
Masculino
Análise de Componente Principal
Asas de Animais/anatomia & histologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1612
[Cu] Atualização por classe:161230
[Lr] Data última revisão:
161230
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160126
[St] Status:MEDLINE


  4 / 167 MEDLINE  
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[PMID]:26611980
[Au] Autor:Belaich MN; Buldain D; Ghiringhelli PD; Hyman B; Micieli MV; Achinelly MF
[Ad] Endereço:CONICET-Laboratorio de Ingeniería Genética y Biología Celular y Molecular (LIGBCM-AVI), Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Bernal, Argentina (1876).
[Ti] Título:Nucleotide sequence differentiation of Argentine isolates of the mosquito parasitic nematode Strelkovimermis spiculatus (Nematoda: Mermithidae).
[So] Source:J Vector Ecol;40(2):415-8, 2015 Dec.
[Is] ISSN:1948-7134
[Cp] País de publicação:United States
[La] Idioma:eng
[Mh] Termos MeSH primário: Culicidae/parasitologia
Mermithoidea/genética
[Mh] Termos MeSH secundário: Animais
Argentina
Sequência de Bases
Ecossistema
Variação Genética
Interações Hospedeiro-Parasita/genética
Larva/parasitologia
Mermithoidea/isolamento & purificação
Reação em Cadeia da Polimerase
Tanques
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1609
[Cu] Atualização por classe:151127
[Lr] Data última revisão:
151127
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151128
[St] Status:MEDLINE
[do] DOI:10.1111/jvec.12183


  5 / 167 MEDLINE  
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[PMID]:26611976
[Au] Autor:Di Battista CM; Fischer S; Campos RE
[Ad] Endereço:Instituto de Limnología "Dr. Raúl A. Ringuelet", Universidad Nacional de La Plata - CONICET, CCT La Plata, Boulevard 120 y 62 - Casilla de Correo N° 712. 1900, La Plata, Buenos Aires, Argentina.
[Ti] Título:Prevalence of parasitism and adult survival time of Aedes albifasciatus (Diptera: Culicidae) parasitized by Strelkovimermis spiculatus (Nematoda: Mermithidae).
[So] Source:J Vector Ecol;40(2):393-7, 2015 Dec.
[Is] ISSN:1948-7134
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:We described the carryover of Strelkovimermis spiculatus (Poinar and Camino) (Nematoda: Mermithidae) from mosquito larvae, the primary site of maturation, to adults. We analyzed the survival time of male and female Aedes albifasciatus (Macquart) (Diptera: Culicidae) parasitized by S. spiculatus, the time of emergence of nematodes from adult mosquitoes, and the state of parasitism in the same mosquito cohorts during the immature stages. Mosquito larvae with single and multiple parasitism (up to 11 parasites) were observed. The mortality of mosquito larvae and adults was produced in all cases where at least one mermithid emerged. The mortality of S. spiculatus showed an increasing trend in mosquito larvae with larger numbers of nematodes and was higher in larvae parasitized by eight or more nematodes. Maximum survival of parasitized adult females of Ae. albifasciatus was 38 days, while non-parasitized adult males and females survived 39 and 41 days, respectively. Strelkovimermis spiculatus mortality was observed in Ae. albifasciatus larvae with single or multiple parasitisms. The spread of mermithid parasitism in adult mosquito populations is discussed.
[Mh] Termos MeSH primário: Aedes/parasitologia
Mermithoidea/patogenicidade
[Mh] Termos MeSH secundário: Aedes/fisiologia
Animais
Argentina
Interações Hospedeiro-Parasita
Larva/parasitologia
Mortalidade
Prevalência
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1609
[Cu] Atualização por classe:151127
[Lr] Data última revisão:
151127
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151128
[St] Status:MEDLINE
[do] DOI:10.1111/jvec.12179


  6 / 167 MEDLINE  
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[PMID]:26031563
[Au] Autor:Muttis E; Micieli MV; Urrutia MI; García JJ
[Ad] Endereço:Centro de Estudios Parasitológicos y Vectores CEPAVE (Consejo Nacional de Investigaciones Científicas y Técnicas CONICET-Universidad Nacional de La Plata UNLP), Calle 120 s/n entre calles 61 y 62, 1900 La Plata, Buenos Aires, Argentina. Electronic address: evangelinamuttis@hotmail.com.
[Ti] Título:Transmission of a pathogenic virus (Iridoviridae) of Culex pipiens larvae mediated by the mermithid Strelkovimermis spiculatus (Nematoda).
[So] Source:J Invertebr Pathol;129:40-4, 2015 Jul.
[Is] ISSN:1096-0805
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Little progress been made in elucidating the transmission pathway of the invertebrate iridescent virus (MIV). It has been proposed that the MIV has no active means to enter the mosquito larva. We have previously found that the presence of the mermithid nematode Strelkovimermis spiculatus is associated with MIV infection in Culex pipiens under field conditions. In the present study, we evaluated the transmission of MIV to C. pipiens larvae mediated by S. spiculatus and several factors involved in this pathway (mosquito instars, nematode:mosquito larva ratio, amount of viral inoculum). Our results indicate that S. spiculatus functions as an MIV vector to C. pipiens larvae and seems to be an important pathway of virus entry into this system. Moreover, TEM images of S. spiculatus exposed to the viral suspension showed no infections inside the nematode but showed that viral particles are carried over the cuticle of this mermithid. This explains the correspondence between MIV infection and the factors that affect the parasitism of S. spiculatus in C. pipiens larvae.
[Mh] Termos MeSH primário: Culex/virologia
Vetores de Doenças
Iridoviridae/patogenicidade
Mermithoidea/virologia
[Mh] Termos MeSH secundário: Animais
Microscopia Eletrônica de Transmissão
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1611
[Cu] Atualização por classe:161230
[Lr] Data última revisão:
161230
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150603
[St] Status:MEDLINE


  7 / 167 MEDLINE  
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[PMID]:25731127
[Au] Autor:Stubbins FL; Agudelo P; Reay-Jones FP; Greene JK
[Ad] Endereço:Clemson University, Department of Agricultural and Environmental Sciences, Edisto Research and Education Center, 64 Research Rd., Blackville, SC 29817, United States. Electronic address: sstubbi@clemson.edu.
[Ti] Título:First report of a mermithid nematode infecting the invasive Megacopta cribraria (Hemiptera: Plataspidae) in the United States.
[So] Source:J Invertebr Pathol;127:35-7, 2015 May.
[Is] ISSN:1096-0805
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Megacopta cribraria (Hemiptera: Plataspidae) has become a pest of soybean, Glycine max (L.), in the United States. While several natural enemies of M. cribraria have been reported, our study is the first to report nematodes beneath the pleural membranes in the abdominal cavities of adults. Morphological and molecular analyses suggest this nematode belongs to the family Mermithidae. This first report of a nematode infection in M. cribraria adds to the current inventory of enemies attacking this insect. Our observations provide a basis for future research to examine the impact of nematodes on M. cribraria mortality and to investigate their capacity to reduce populations.
[Mh] Termos MeSH primário: Heterópteros/parasitologia
[Mh] Termos MeSH secundário: Animais
Genes de Helmintos
Mermithoidea
Estados Unidos
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1611
[Cu] Atualização por classe:161230
[Lr] Data última revisão:
161230
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150304
[St] Status:MEDLINE


  8 / 167 MEDLINE  
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[PMID]:25500990
[Au] Autor:Rasmussen TK; Randhawa HS
[Ad] Endereço:Ecology Degree Programme, Department of Botany, University of Otago, PO Box 56, Dunedin, 9054, New Zealand, trent.rasmussen@otago.ac.nz.
[Ti] Título:Factors influencing spatial variation and abundance of a mermithid parasite in sand hoppers.
[So] Source:Parasitol Res;114(3):895-901, 2015 Mar.
[Is] ISSN:1432-1955
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:The impact of parasites on host population dynamics depends on local abundance of the parasites, which may vary considerably across spatial scales. In sand hopper populations, mermithid parasites have major impacts on host dynamics, which may vary among spatially separated populations due to the sand hopper's wide, patchy distribution. The present study compared the abundance and biomass of a mermithid parasite (Thaumamermis zealandica Poinar et al., 2002) in sand hoppers (Bellorchestia quoyana (Milne-Edwards)) both within and among disconnected beaches. In addition, several variables were measured and tested as potentially important predictors of the parasite abundance and biomass. It was found that geographic isolation may only be responsible for minor differences in parasite populations compared with other factors. Host size was identified as the most important predictor of mermithid parasite abundance, but epibiont abundance, kelp patch mass and host density were poor predictors of abundance. These factors were also poor predictors of parasite biomass in hosts. This study further supports the notion that studies aiming to elucidate population dynamics or patterns should sample thoroughly across both spatial and temporal scales.
[Mh] Termos MeSH primário: Anfípodes/parasitologia
Mermithoidea/fisiologia
[Mh] Termos MeSH secundário: Distribuição Animal
Animais
Interações Hospedeiro-Parasita
Dinâmica Populacional
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1601
[Cu] Atualização por classe:171007
[Lr] Data última revisão:
171007
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:141216
[St] Status:MEDLINE
[do] DOI:10.1007/s00436-014-4254-5


  9 / 167 MEDLINE  
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[PMID]:24503193
[Au] Autor:Presswell B; Evans S; Poulin R; Jorge F
[Ad] Endereço:Department of Zoology,University of Otago,PO Box 56,Dunedin,New Zealand.
[Ti] Título:Morphological and molecular characterization of Mermis nigrescens Dujardin, (Nematoda: Mermithidae) parasitizing the introduced European earwig (Dermaptera: Forficulidae) in New Zealand.
[So] Source:J Helminthol;89(3):267-76, 2015 May.
[Is] ISSN:1475-2697
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Parasitic nematodes of the family Mermithidae were found to be infecting the introduced European earwig Forficula auricularia (Dermaptera: Forficulidae) in Dunedin, South Island, New Zealand. Adult females were later collected from various garden plants while depositing eggs. These mermithid specimens were identified morphologically as Mermis nigrescens Dujardin, 1842. A genetic distance of 0.7% between these specimens and a M. nigrescens isolate from Canada (18S rRNA gene), suggests that they have diverged genetically, but there are currently no available comparable sequences for the European M. nigrescens. Two additional nuclear fragments were also amplified, the 28S rRNA and the ribosomal DNA first internal transcribed spacer (ITS1), providing a basis for future studies. Bearing in mind the morphological similarity with other reported M. nigrescens and the lack of sequence data from other parts of the world, we retain the name M. nigrescens, and suggest that the species may be found to represent a complex of cryptic species when more worldwide data are available. Herein, we present a brief description of the post-parasitic worms and adult females, along with an inferred phylogeny using 18S rRNA gene sequences.
[Mh] Termos MeSH primário: Insetos/parasitologia
Mermithoidea/anatomia & histologia
Mermithoidea/genética
[Mh] Termos MeSH secundário: Animais
Análise por Conglomerados
DNA de Helmintos/química
DNA de Helmintos/genética
DNA Ribossômico/química
DNA Ribossômico/genética
DNA Espaçador Ribossômico/química
DNA Espaçador Ribossômico/genética
Mermithoidea/classificação
Mermithoidea/isolamento & purificação
Microscopia
Dados de Sequência Molecular
Nova Zelândia
Filogenia
RNA Ribossômico 18S/genética
RNA Ribossômico 28S/genética
Análise de Sequência de DNA
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (DNA, Helminth); 0 (DNA, Ribosomal); 0 (DNA, Ribosomal Spacer); 0 (RNA, Ribosomal, 18S); 0 (RNA, Ribosomal, 28S)
[Em] Mês de entrada:1602
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140208
[St] Status:MEDLINE
[do] DOI:10.1017/S0022149X14000017


  10 / 167 MEDLINE  
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[PMID]:24738226
[Au] Autor:Kaplich VM; Arutiunova KV; Arutiunova MV
[Ti] Título:[Blackflies (Diptera: Simuliidae) of North of Armenia].
[So] Source:Med Parazitol (Mosk);(1):37-41, 2014 Jan-Mar.
[Is] ISSN:0025-8326
[Cp] País de publicação:Russia (Federation)
[La] Idioma:rus
[Ab] Resumo:The fauna of blackflies of North Armenia is represented by 12 species from the genus Simulium. The species composition in the Tavush Region is most diverse (10 species) versus that in the Shirak (n = 5) and Lori (n = 3) Provinces, which is due to a wide variety of Simuliidae breeding sites. Among the bioregulators of blackflies, there are microsporidia of 4 species, cabbageworms (Mermithidae), and caddisflies of the genus Hydropsyche. There is a preponderance of microsporidia among the blackfly bioregulators. The highest percentage (60%) of the larvae infected with microsporidia is noted in the second half of summer, which is related to their environmental conditions.
[Mh] Termos MeSH primário: Larva/microbiologia
Simuliidae/microbiologia
[Mh] Termos MeSH secundário: Animais
Armênia
Larva/parasitologia
Mermithoidea/isolamento & purificação
Mermithoidea/fisiologia
Microsporídios/isolamento & purificação
Microsporídios/fisiologia
Rios/microbiologia
Rios/parasitologia
Simuliidae/classificação
Simuliidae/parasitologia
[Pt] Tipo de publicação:ENGLISH ABSTRACT; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1410
[Cu] Atualização por classe:140417
[Lr] Data última revisão:
140417
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140418
[St] Status:MEDLINE



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