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Pereira CADJ, Coaglio AL, Capettini LS, Becattini R, Ferreira APPN, Costa A, Soares LM, Oliveira LL, Lima WDS. New approaches to studying morphological details of intramolluscan stages of Angiostrongylus vasorum. REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA = BRAZILIAN JOURNAL OF VETERINARY PARASITOLOGY : ORGAO OFICIAL DO COLEGIO BRASILEIRO DE PARASITOLOGIA VETERINARIA 2020; 29:e000420. [PMID: 32609238 DOI: 10.1590/s1984-29612020044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 04/24/2020] [Indexed: 11/22/2022]
Abstract
Angiostrongylus vasorum is a pulmonary artery parasite of domestic and wild canid. On molluscs, intermediate host, first stage larvae (L1) are found after the first day of infection, in the 8th L2 and in the 30 th L3. It was evaluated L1, L2 and L3 recovered by Baermann technique from Achatina fulica infected with 1000 L1. Fifty larvae/stage were incubated with antibodies anti-β-tubulin, anti-α-tubulin, anti- α-actin, anti-β-actin and anti-collagen, and then with Alexa 633. Fifty larvae/stage were observed with picrosirius red and Oil Red O. It was also observed in the anterior region of L1 the beginning of the chitinous stems development, in the initial portion of the intestine and genital primordium. In L2 anterior region, the papillae, chitinous canes juxtaposed to the mouth and intestines bigger than L1. The L3 musculature is well defined, next to the chitinous stems, there are two round distally arranged from each other. It was observed the whole extension of the intestine genital primordium and intense cellularity in the L3 distal portion. With the picrosirius red the L1, L2 and L3 musculature could be observed, as the nerve ganglia on L3. Oil Red O revealed that L1, L2 and L3 store energy on lipid droplets.
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Affiliation(s)
| | - Aytube Lucas Coaglio
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas - UFMG, Belo Horizonte, MG, Brasil
| | - Luciano Santos Capettini
- Departamento de Farmacologia, Instituto de Ciências Biológicas, Universidade Federal de Minas - UFMG, Belo Horizonte, MG, Brasil
| | - Raphael Becattini
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas - UFMG, Belo Horizonte, MG, Brasil
| | - Ana Paula Pereira Neves Ferreira
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas - UFMG, Belo Horizonte, MG, Brasil
| | - Andreia Costa
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas - UFMG, Belo Horizonte, MG, Brasil
| | - Lanuze Mozzer Soares
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas - UFMG, Belo Horizonte, MG, Brasil
| | - Laura Lúcia Oliveira
- Departamento Zootecnia, Universidade Estadual de Montes Claros - UNIMONTES, Janaúba, MG, Brasil
| | - Walter Dos Santos Lima
- Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas - UFMG, Belo Horizonte, MG, Brasil
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Eurytrema coelomaticum: updated morphology of adult worms using advanced microscopy experiments. J Helminthol 2020; 94:e122. [PMID: 31964430 DOI: 10.1017/s0022149x19001135] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Eurytrema coelomaticum is a digenean flatworm of ruminants that is the causative agent of eurytrematosis, a disease of veterinary health concern. Although modern techniques of morphological analysis have provided new insights about the morphology and anatomy of parasitic helminths, most studies on E. coelomaticum adults are based on conventional light microscopy. In the present study, a combined approach using brightfield, fluorescence, confocal and scanning electron microscopies (SEMs), together with the cryofracture technique, have updated morphological data on E. coelomaticum recovered from cattle in Rio de Janeiro State, Brazil. Light microscopy confirmed the presence of several structures present in the current description, such as suckers, pharynx, oesophagus, intestinal bifurcation and the cirrus-sac. Fluorescence stereomicroscopy revealed for the first time the cubic crystal protein inclusions in the forebody, which were further detailed by confocal and SEMs. Confocal microscopy provided detailed information of the muscular architecture associated with the attachment structures (suckers), digestive system (pharynx and oesophagus), egg-forming complex (ovary, Mehlis' gland and Laurer's canal) and male reproductive system, which are similar to those found in other digenean flukes. SEM images of cryofractured parasites showed mucus and developing eggs within uterine loops. It was demonstrated that the combination of advanced tools generated complementary information, confirming the importance of experimental morphology in parasitology. Therefore, the knowledge of the adult structural organization of E. coelomaticum was improved and this work has contributed to propose new morphological criteria to evaluate the effects of antiparasitic drugs on flukes of medical and veterinary importance.
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Monte TCDC, Braga BV, Vasconcellos MCD, Jurberg AD, Mota EM, Barbosa HS, Garcia JS, Maldonado Júnior A. Morphological effects on helminth parasites caused by herbicide under experimental conditions. REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA = BRAZILIAN JOURNAL OF VETERINARY PARASITOLOGY : ORGAO OFICIAL DO COLEGIO BRASILEIRO DE PARASITOLOGIA VETERINARIA 2018; 27:42-51. [PMID: 29641790 DOI: 10.1590/s1984-29612017074] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 11/20/2017] [Indexed: 11/21/2022]
Abstract
Helminth parasites have been studied as potential accumulators for different pollutants. Echinostoma paraensei is a foodborne trematode whose vertebrate host, the rodent Nectomys squamipes, is naturally exposed to environmental pesticides. However, little information exists regarding the pesticide's effects on helminths. This study investigated the morphological effects on the trematode, E. paraensei, after experimental Roundup® herbicide exposure, in concentrations below those recommended for agricultural use. After two hours of exposure, scanning electron microscopy (SEM) showed changes to the tegument, such as furrowing, shrinkage, peeling, spines loss on the peristomic collar, and histopathological evidence of altered cells in the cecum and acinus vitelline glands with vacuoles and structural changes to the muscular layers. Glycidic content was decreased, primarily in the connective tissue. As E. paraensei is an intestinal parasite of the semi-aquatic wild rodent, N. squamipes, it is predisposed to pesticide exposure resulting from agricultural practices. Therefore, we emphasize the need to evaluate its impact on helminth parasites, due to their pivotal role in regulating host populations.
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Affiliation(s)
- Tainá Carneiro de Castro Monte
- Programa de Pós-graduação em Biodiversidade e Saúde, Instituto Oswaldo Cruz - FIOCRUZ, Rio de Janeiro, RJ, Brasil
- Laboratório de Biologia e Parasitologia de Mamíferos Silvestres Reservatórios, Instituto Oswaldo Cruz - FIOCRUZ, Rio de Janeiro, RJ, Brasil
| | - Brunna Vianna Braga
- Laboratório de Biologia e Parasitologia de Mamíferos Silvestres Reservatórios, Instituto Oswaldo Cruz - FIOCRUZ, Rio de Janeiro, RJ, Brasil
- Programa de Pós-graduação em Biologia Parasitária, Instituto Oswaldo Cruz - FIOCRUZ, Rio de Janeiro, RJ, Brasil
| | | | - Arnon Dias Jurberg
- Laboratório de Pesquisas sobre o Timo, Instituto Oswaldo Cruz - FIOCRUZ, Rio de Janeiro, RJ, Brasil
| | - Ester Maria Mota
- Laboratório de Patologia, Instituto Oswaldo Cruz - FIOCRUZ, Rio de Janeiro, RJ, Brasil
| | - Helene Santos Barbosa
- Laboratório de Biologia Estrutural, Instituto Oswaldo Cruz - FIOCRUZ, Rio de Janeiro, RJ, Brasil
| | - Juberlan Silva Garcia
- Laboratório de Biologia e Parasitologia de Mamíferos Silvestres Reservatórios, Instituto Oswaldo Cruz - FIOCRUZ, Rio de Janeiro, RJ, Brasil
| | - Arnaldo Maldonado Júnior
- Laboratório de Biologia e Parasitologia de Mamíferos Silvestres Reservatórios, Instituto Oswaldo Cruz - FIOCRUZ, Rio de Janeiro, RJ, Brasil
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Souza JG, Garcia JS, Gomes APN, Machado-Silva JR, Maldonado A. Comparative pattern of growth and development of Echinostoma paraensei (Digenea: Echinostomatidae) in hamster and Wistar rat using light and confocal laser scanning microscopy. Exp Parasitol 2017; 183:41-49. [DOI: 10.1016/j.exppara.2017.10.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 10/07/2017] [Accepted: 10/09/2017] [Indexed: 10/18/2022]
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Gonçalves JP, Oliveira-Menezes A, Maldonado A, Carvalho TM, de Souza W. Ultrastructural and cytochemical characterization of T1 and T2 secretory bodies from the tegument of Echinostoma paraensei. Micron 2016; 80:59-65. [DOI: 10.1016/j.micron.2015.09.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2015] [Revised: 09/11/2015] [Accepted: 09/12/2015] [Indexed: 11/26/2022]
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Peoples RC, Fried B. Form and function in the digenea. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2014; 766:3-20. [PMID: 24903361 DOI: 10.1007/978-1-4939-0915-5_1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Robert C Peoples
- Schistosomiasis Lab, Biomedical Research Institute, 12111 Parklawn Drive, Rockville, MD, 20851, USA,
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In vitro excystation of Echinostoma paraensei (Digenea: Echinostomatidae) metacercariae assessed by light microscopy, morphometry and confocal laser scanning microscopy. Exp Parasitol 2013; 135:701-7. [DOI: 10.1016/j.exppara.2013.10.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 10/02/2013] [Accepted: 10/23/2013] [Indexed: 11/22/2022]
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Adnet FADO, Gonçalves JP, de Souza W, Attias M. A simple and efficient method to observe internal structures of helminths by scanning electron microscopy. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2013; 19:1470-1474. [PMID: 24148995 DOI: 10.1017/s1431927613013706] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Morphological studies of helminths by scanning electron microscopy are generally limited to the external topography of the organisms. In this work, we present a simple technique using ethanol as a cryoprotectant without postfixation in osmium tetroxide that allows for observation of the inner organization of helminths and preserves cellular structures. We tested the technique in three helminths: Echinostoma paraensei, Cruzia tentaculata, and Hassalstrongylus epsilon. The results show that this technique could potentially be applied to study the morphology, ultrastructure, and taxonomy of helminths.
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Affiliation(s)
- Fernando Antônio de O Adnet
- Laboratório de Biologia de Helmintos Otto Wucherer, Centro de Ciências da Saúde, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Bloco G, Ilha do Fundão, 21949-900 Rio de Janeiro, Brazil
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Gonçalves JP, Oliveira-Menezes A, Maldonado Junior A, Carvalho TM, de Souza W. Evaluation of Praziquantel effects on Echinostoma paraensei ultrastructure. Vet Parasitol 2013; 194:16-25. [DOI: 10.1016/j.vetpar.2012.12.042] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2012] [Revised: 11/28/2012] [Accepted: 12/15/2012] [Indexed: 01/15/2023]
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Ferraz J, Souza J, Costa-Silva M, Torres E, Santana A, Lanfredi R, Maldonado A, Garcia J. Effect of praziquantel on adult Echinostoma paraensei worms in experimentally infected mice. Parasitol Res 2012; 111:143-8. [DOI: 10.1007/s00436-011-2810-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2011] [Accepted: 12/23/2011] [Indexed: 11/25/2022]
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