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Goveia CDO, Caldeira RL, Barata RR, Lemos PDS, Teixeira Nunes MR, Dias IHL, Enk MJ. First report of Biomphalaria tenagophila (d'Orbigny, 1835) (Gastropoda/Planorbidae) in Pará State, Amazon region of Brazil. Exp Parasitol 2023; 247:108482. [PMID: 36801395 DOI: 10.1016/j.exppara.2023.108482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 01/04/2023] [Accepted: 02/10/2023] [Indexed: 02/19/2023]
Abstract
INTRODUCTION Mollusks belonging to Biomphalaria genus are intermediate hosts of Schistosoma mansoni. In the Pará State, Northern Region of Brazil, there are reports of B. glabrata, B. straminea, B. schrammi, B. occidentalis, and B. kuhniana occurrence. Here, we report for the first time the presence of B. tenagophila in Belém, capital of Pará state. METHODS A total of 79 mollusks were collected and examined to search for possible S. mansoni infection. The specific identification was made by morphological and molecular assays. RESULTS No specimens parasitized by trematode larvae were detected. For the first time the presence of B. tenagophila in Belém, capital of Pará state, was reported. CONCLUSION The result increases the knowledge about Biomphalaria mollusks occurrence in the Amazon Region and specifically alerts on the possible role of B. tenagophila in schistosomiasis transmission in Belém.
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Affiliation(s)
- Christiane de Oliveira Goveia
- Instituto Evandro Chagas, Seção de Parasitologia, Laboratório de Malacologia, Ananindeua, PA, Brazil; Programa de Pós-Graduação em Biologia Parasitária na Amazônia - Universidade do Estado do Pará, Belém, PA, Brazil.
| | - Roberta Lima Caldeira
- Fundação Oswaldo Cruz, Instituto René Rachou, Grupo de Pesquisa em Helmintologia e Malacologia Médica, Belo Horizonte, MG, Brazil
| | | | | | | | - Isabelle Helena Lima Dias
- Programa de Pós-Graduação em Biologia Parasitária na Amazônia - Universidade do Estado do Pará, Belém, PA, Brazil
| | - Martin Johannes Enk
- Instituto Evandro Chagas, Seção de Parasitologia, Laboratório de Parasitoses Intestinais e Esquistossomose, PA, Brazil
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de Araújo AD, Carvalho ODS, Gava SG, Caldeira RL. DNA barcoding as a valuable tool for delimiting mollusk species of the genus Biomphalaria Preston, 1910 (Gastropoda: Planorbidae). Front Cell Infect Microbiol 2023; 13:1167787. [PMID: 37168391 PMCID: PMC10165093 DOI: 10.3389/fcimb.2023.1167787] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 03/22/2023] [Indexed: 05/13/2023] Open
Abstract
Introduction The genus Biomphalaria in Brazil includes 11 species and one subspecies, three of which are intermediate hosts of Schistosoma mansoni. Due to the recent evolution of this group, some species are difficult to identify based on morphological characters, making the use of genetic markers necessary for species identification. This study aimed to evaluate the use of partial sequences of the cytochrome c oxidase I (coi) gene for the identification of Biomphalaria species using phylogenetic reconstruction and species delimitation algorithms. The study tested the use of DNA barcoding technique for species delimitation within the genus. Methods DNA barcoding was performed by sequencing a partial region of the coi gene from specimens, and the sequences were analyzed using phylogenetic reconstruction and algorithms to delimit Operational Taxonomic Units (OTUs). Results The study found that the use of the coi gene in the reconstruction of the phylogeny of the genus might be an alternative for understanding the evolution and dispersion of species. However, this marker alone is not enough to solve complex taxonomic problems within the genus. A total of 223 sequences were analyzed, 102 of which could be separated using the barcode gap, enabling the correct identification of seven taxa. Discussion The study demonstrated that accurate mollusk identification is necessary for effective schistosomiasis control. The DNA barcoding methodology was found to be promising for accurate mollusk identification, which is crucial for concentrating schistosomiasis control efforts in places where it is needed.
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Coelho PRS, Ker FTO, Araujo AD, Pinto HA, Negrão-Corrêa DA, Caldeira RL, Geiger SM. Survey on Limnic Gastropods: Relationships between Human Health and Conservation. Pathogens 2022; 11:pathogens11121533. [PMID: 36558867 PMCID: PMC9786810 DOI: 10.3390/pathogens11121533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 11/16/2022] [Accepted: 12/06/2022] [Indexed: 12/15/2022] Open
Abstract
The present work aimed to study ecological aspects related to the distribution pattern of medically important and native freshwater mollusks, found in a rural municipality in the state of Minas Gerais, Brazil. Malacological captures were carried out in aquatic environments (lentic and lotic) from 46 locations between October 2018 and September 2019. The collected specimens were subjected to taxonomic identification and evaluation for infection with trematode larvae. Qualitative data were used to analyze the similarity and the odds ratios between the environmental variables. In total, 1125 specimens were sampled, belonging to the following species: Biomphalaria glabrata, B. tenagophila, B. straminea, B. kuhniana, B. cousini, Biomphalaria sp., and Drepanotrema cimex (Planorbidae), Stenophysa marmorata (Physidae), Omalonyx sp. (Succineidae), Pseudosuccinea columella (Lymnaeidae), and Pomacea sp. (Ampullaridae). Echinostome, strigeocercaria, and xiphidiocercaria types of larval trematodes were detected in S. marmorata and D. cimex. Of note was the similarity in the distribution of S. marmorata, a supposedly endangered species, with that of the medically important Biomphalaria species, with the two sharing environments. This complex scenario led us to reflect on and discuss the need for the control of important intermediate hosts, as well as the conservation of endangered species. This relevant issue has not yet been discussed in detail, in Brazil or in other countries that recommend snail control.
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Affiliation(s)
- Paulo R. S. Coelho
- Laboratory of Intestinal Helminthiasis, Department of Parasitology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
- Correspondence:
| | - Fabricio T. O. Ker
- Laboratory of Epidemiology of Infectious and Parasitic Diseases, Department of Parasitology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Amanda D. Araujo
- Research Group on Helminthology and Medical Malacology, René Rachou Institute, Oswaldo Cruz Foundation, Belo Horizonte, Brazil
| | - Hudson A. Pinto
- Laboratory Trematoda Biology, Department of Parasitology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Deborah A. Negrão-Corrêa
- Laboratory of Immunohelminthology and Schistosomiasis, Department of Parasitology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Roberta L. Caldeira
- Research Group on Helminthology and Medical Malacology, René Rachou Institute, Oswaldo Cruz Foundation, Belo Horizonte, Brazil
| | - Stefan M. Geiger
- Laboratory of Intestinal Helminthiasis, Department of Parasitology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
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Coelho PRS, Ker FTO, Araújo AD, Guimarães RJPS, Negrão-Corrêa DA, Caldeira RL, Geiger SM. Identification of Risk Areas for Intestinal Schistosomiasis, Based on Malacological and Environmental Data and on Reported Human Cases. Front Med (Lausanne) 2021; 8:642348. [PMID: 34422845 PMCID: PMC8377395 DOI: 10.3389/fmed.2021.642348] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 07/14/2021] [Indexed: 11/13/2022] Open
Abstract
The aim of the present study was to use an integrated approach for the identification of risk areas for Schistosoma mansoni transmission in an area of low endemicity in Minas Gerais, Brazil. For that, areas of distribution of Biomphalaria glabrata were identified and were related to environmental variables and communities with reported schistosomiasis cases, in order to determine the risk of infection by spatial analyses with predictive models. The research was carried out in the municipality of Alvorada de Minas, with data obtained between the years 2017 and 2019 inclusive. The Google Earth Engine was used to obtain geo-climatic variables (temperature, precipitation, vegetation index and digital elevation model), R software to determine Pearson's correlation and MaxEnt software to obtain an ecological model. ArcGis Software was used to create maps with data spatialization and risk maps, using buffer models (diameters: 500, 1,000 and 1,500 m) and CoKriging. Throughout the municipality, 46 collection points were evaluated. Of these, 14 presented snails of the genus Biomphalaria. Molecular analyses identified the presence of different species of Biomphalaria, including B. glabrata. None of the snails eliminated S. mansoni cercariae. The distribution of B. glabrata was more abundant in areas of natural vegetation (forest and cerrado) and, for spatial analysis (Buffer), the main risk areas were identified especially in the main urban area and toward the northern and eastern extensions of the municipality. The distribution of snails correlated with temperature and precipitation, with the latter being the main variable for the ecological model. In addition, the integration of data from malacological surveys, environmental characterization, fecal contamination, and data from communities with confirmed human cases, revealed areas of potential risk for infection in the northern and eastern regions of the municipality. In the present study, information was integrated on epidemiological aspects, transmission and risk areas for schistosomiasis in a small, rural municipality with low endemicity. Such integrated methods have been proposed as important tools for the creation of schistosomiasis transmission risk maps, serve as an example for other communities and can be used for control actions by local health authorities, e.g., indicate priority sectors for sanitation measures.
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Affiliation(s)
- Paulo R S Coelho
- Department for Parasitology, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Fabrício T O Ker
- Department for Parasitology, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Amanda D Araújo
- Oswaldo Cruz Foundation (Fiocruz), Research Group on Helminthology and Medical Malacology, René Rachou Institute, Belo Horizonte, Brazil
| | | | | | - Roberta L Caldeira
- Oswaldo Cruz Foundation (Fiocruz), Research Group on Helminthology and Medical Malacology, René Rachou Institute, Belo Horizonte, Brazil
| | - Stefan M Geiger
- Department for Parasitology, Federal University of Minas Gerais, Belo Horizonte, Brazil
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Tchami Mbagnia MC, Melachio Tanekou TT, Kengne Fokam AC, Nguiffo Nguete D, Wondji CS, Njiokou F. PCR-based molecular identification of two intermediate snail hosts of Schistosoma mansoni in Cameroon. Parasit Vectors 2020; 13:158. [PMID: 32228678 PMCID: PMC7106826 DOI: 10.1186/s13071-020-04033-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 03/25/2020] [Indexed: 11/24/2022] Open
Abstract
Background Snails of the genus Biomphalaria are intermediate hosts of Schistosoma mansoni, the causative agent of the human intestinal schistosomiasis. Two Biomphalaria species (Biomphalaria pfeifferi and Biomphalaria camerunensis) are involved in the transmission in Cameroon, where the disease is present nationwide. However, difficulty in the identification of both vectors impedes proper assessment of the epidemiological burden caused by each species. To overcome this issue, we designed a PCR-based molecular diagnostic tool to improve the identification of these species. Methods We analyzed the internal transcribed spacer 2 (ITS2) region of Biomphalaria ribosomal DNA (rDNA) using polymerase chain reaction amplification (PCR) and restriction fragment length polymorphism (RFLP). Results The amplification of the ITS2 region of Biomphalaria snails resulted in a 490 bp fragment and produced two profiles for each species after digestion with the restriction enzyme Hpa II. The profile 1 (Bc-HpaII-1: 212-bp and 139-bp bands) for B. camerunensis, was common in all the sampling points; the profile 2 (Bc-HpaII-2: 212-bp and 189-bp bands), was only observed in the Lake Monoun Njindoun sampling site. Biomphalaria pfeifferi profile 1 (Bpf-HpaII-1: 211-bp and 128-bp bands) was common in most of B. pfeifferi sampling points; the profile 2 (Bpf-HpaII-2: 289-bp and 128-bp bands) was only observed in Mokolo (Far North Cameroon).The second restriction enzyme TaqαI, revealed three band profiles, Bc-TaqαI-1 (243-bp, 136-bp and 118-bp bands) and Bc-TaqαI-2 (244-bp, 136-bp and 99-bp) for B. camerunensis and Bpf-TaqαI-1 (242-bp, 135-bp and 107-bp bands) for B. pfeifferi. Sequencing analysis revealed the occurrence of six haplotypes for B. camerunensis and three haplotypes for B. pfeifferi. The level of gene flow was low and the Biomphalaria populations were not in demographic expansion according to neutrality tests (Tajima’s D and Fu’s Fs). Conclusions The PCR-RFLP technique revealed genetic diversity in Biomphalaria snails, and the combination with the morphological method could improve the identification of B. pfeifferi and B. camerunensis in Cameroon. This could help focus on the infection to evaluate the transmission risk with respect of the different species and to develop efficient and cost-effective control measures.![]()
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Affiliation(s)
- Mureille Carole Tchami Mbagnia
- Parasitology and Ecology Laboratory, Department of Animal Biology and Physiology, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
| | - Tito Trésor Melachio Tanekou
- Centre for Research in Infectious Diseases, Yaoundé, Cameroon.,Department of Biological Sciences, Faculty of Science, University of Bamenda, Bamenda, Cameroon
| | - Alvine Christelle Kengne Fokam
- Parasitology and Ecology Laboratory, Department of Animal Biology and Physiology, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
| | - Daniel Nguiffo Nguete
- Centre for Research in Infectious Diseases, Yaoundé, Cameroon.,Research Unit of Applied Biology and Ecology, University of Dschang, Dschang, Cameroon
| | - Charles Sinclair Wondji
- Centre for Research in Infectious Diseases, Yaoundé, Cameroon.,Department of Vector Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK
| | - Flobert Njiokou
- Parasitology and Ecology Laboratory, Department of Animal Biology and Physiology, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon. .,Centre for Research in Infectious Diseases, Yaoundé, Cameroon.
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Ohlweiler FP, Rossignoli TDJ, Palasio RGS, Tuan R. Taxonomic diversity of Biomphalaria (Planorbidae) in São Paulo state, Brazil. BIOTA NEOTROPICA 2020. [DOI: 10.1590/1676-0611-bn-2020-0975] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract: Morphological and molecular identifications were carried out for Biomphalaria occidentalis, Biomphalaria oligoza, Biomphalaria peregrina, Biomphalaria schrammi, Biomphalaria straminea and Biomphalaria tenagophila collected from 55 sites located along the upper basin of Tietê River in the Southeast Region of Brazil. Morphological analysis considered aspects of the shell, mantle, excretory organs and reproductive system. Molecular data included 122 sequences of Cytochrome C Oxidase I gene (COI). Our results showed that some shell characters, as well as other characters related to the mantle and the reproductive system, are fundamental for the identification of the six Biomphalaria species included in this study. The use of DNA barcoding together with morphological taxonomy generated more reliable results, proving to be a very useful approach, even for malacological surveillance services.
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Affiliation(s)
| | | | | | - Roseli Tuan
- Superintendência de Controle de Endemias, Brasil
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Rumi A, Vogler RE, Beltramino AA. The South-American distribution and southernmost record of Biomphalaria peregrina-a potential intermediate host of schistosomiasis. PeerJ 2017; 5:e3401. [PMID: 28584726 PMCID: PMC5452991 DOI: 10.7717/peerj.3401] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 05/10/2017] [Indexed: 01/21/2023] Open
Abstract
Schistosomiasis remains a major parasitic disease, endemic in large parts of South America. Five neotropical species of Biomphalaria have been found to act as intermediate hosts of Schistosoma mansoni in natural populations, while others have been shown to be susceptible in experimental infections, although not found infected in the field. Among these potential intermediate hosts, Biomphalaria peregrina represents the most widespread species in South America, with confirmed occurrence records from Venezuela to northern Patagonia. In this study, we report the southernmost record for the species at the Pinturas River, in southern Patagonia, which finding implies a southward reassessment of the limit for the known species of this genus. The identities of the individuals from this population were confirmed through morphological examination, and by means of two mitochondrial genes, cytochrome oxidase subunit I (COI) and 16S-rRNA. With both markers, phylogenetic analyses were conducted in order to compare the genetic background of individuals from the Pinturas River with previously genetically characterized strains of B. peregrina from various South-American locations. In addition, we produced a potential distribution model of B. peregrina in South America and identified the environmental variables that best predict that distribution. The model was estimated through a maximum entropy algorithm and run with occurrence points obtained from several sources, including the scientific literature and international databases, along with climatic and hydrographic variables. Different phylogenetic analyses with either the COI or 16S-rRNA sequences did not conflict, but rather gave very similar topological organizations. Two major groups were identified, with sequences from the Pinturas River grouping together with haplotypes from subtropical and temperate regions. The model developed had a satisfactory performance for the study area. We observed that the areas with higher habitat suitability were found to be mainly linked to subtropical and temperate regions of South America between 15° and 45° south latitude, with different moderate- and low-suitability areas outside this range. We also identified the coldest temperatures as the main predictors of the potential distribution of this snail. Susceptibility surveys would be required to evaluate if southern populations of B. peregrina still retain their potential as intermediate hosts of S. mansoni.
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Affiliation(s)
- Alejandra Rumi
- División Zoología Invertebrados, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), CABA, Argentina
| | - Roberto Eugenio Vogler
- División Zoología Invertebrados, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), CABA, Argentina
- Instituto de Biología Subtropical, Universidad Nacional de Misiones- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Posadas, Misiones, Argentina
| | - Ariel Aníbal Beltramino
- División Zoología Invertebrados, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), CABA, Argentina
- Departamento de Biología, Facultad de Ciencias Exactas, Químicas y Naturales, Universidad Nacional de Misiones, Posadas, Misiones, Argentina
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Characterization of South American Snails of the Genus Biomphalaria (Basommatophora: Planorbidae) and Schistosoma mansoni (Platyhelminthes: Trematoda) in Molluscs by PCR-RFLP. BIOMED RESEARCH INTERNATIONAL 2016; 2016:1045391. [PMID: 27981045 PMCID: PMC5131227 DOI: 10.1155/2016/1045391] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 02/11/2016] [Indexed: 11/23/2022]
Abstract
The identification of snails of the genus Biomphalaria can be done using morphological characteristics which depends on the size of the snails and skill and knowledge of researcher. These methods sometimes are not adequate for identification of species. The PCR-RFLP, using the ITS region of the rDNA, has been used to identify Brazilian species of the genus Biomphalaria. Nevertheless, there is a lack of information about snails from other Latin American countries. In addition, some snails may be infected by Schistosoma mansoni and when submitted to PCR-RFLP they show molecular profiles different from those previously standardized for the other mollusc species. In this work the molecular profiles of 15 species and the subspecies were established by PCR-RFLP of ITS-rDNA with the enzyme DdeI. Moreover, the molecular profiles of host species, B. glabrata, B. straminea, B. tenagophila, and B. prona, infected by S. mansoni were also established. The molluscs were dissected to permit morphological identification. These results contribute to a correct identification of snails of the genus Biomphalaria and detection of these snails infected by S. mansoni.
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Aboelhadid SM, Thabet M, El-Basel D, Taha R. Digenetic larvae in Schistosome snails from El Fayoum, Egypt with detection of Schistosoma mansoni in the snail by PCR. J Parasit Dis 2014; 40:730-4. [PMID: 27605774 DOI: 10.1007/s12639-014-0567-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Accepted: 09/08/2014] [Indexed: 11/30/2022] Open
Abstract
The present study aims to detect the digenetic larvae infections in Bulinus truncatus and Biomphalaria alexandrina snails and also PCR detection of Schistosoma mansoni infection. The snails were collected from different branches of Yousef canal and their derivatives in El Fayoum Governorate. The snails were investigated for infection through induction of cercarial shedding by exposure to light and crushing of the snails. The shed cercariae were S. mansoni, Pharyngeate longifurcate type I and Pharyngeate longifurcate type II from B. alexandrina, while that found in B. truncatus were Schitosoma haematobium and Xiphidiocercaria species cercariae. The seasonal prevalence of infection was discussed. Polymerase chain reaction was used for the detection of S. mansoni in the DNA from field collected infected and non infected snails. The results of PCR showed that the pool of B. alexandrina snails which shed S. mansoni cercariae in the laboratory, gave positive reaction in the samples. Pooled samples of field collected B. alexandrina that showed negative microscopic shedding of cercariae gave negative and positive PCR in a consecutive manner. Accordingly, a latent infection in the snail (negative microscopic) could be detected by using PCR.
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Affiliation(s)
- Shawky M Aboelhadid
- Parasitology Department, Faculty of Veterinary Medicine, Beni Suef University, Beni Suef, Egypt
| | - Marwa Thabet
- Zoology Department, Faculty of Science, El Fayoum University, El Faiyum, Egypt
| | - Dayhoum El-Basel
- Zoology Department, Faculty of Science, El Fayoum University, El Faiyum, Egypt
| | - Ragaa Taha
- Zoology Department, Faculty of Science, El Fayoum University, El Faiyum, Egypt
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Aguiar-Silva C, Mendonça CLF, da Cunha Kellis Pinheiro PH, Mesquita SG, Carvalho ODS, Caldeira RL. Evaluation and updating of the Medical Malacology Collection (Fiocruz-CMM) using molecular taxonomy. SPRINGERPLUS 2014; 3:446. [PMID: 25184111 PMCID: PMC4150920 DOI: 10.1186/2193-1801-3-446] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Accepted: 08/01/2014] [Indexed: 12/04/2022]
Abstract
Background The Medical Malacology Collection (Coleção de Malacologia Médica, Fiocruz-CMM) is a depository of medically relevant mollusks, especially from the genus Biomphalaria, which includes the hosts of Schistosoma mansoni. Taxonomic studies of these snails have traditionally focused on the morphology of the reproductive system. However, determination of some species is complicated by the similarity shown by these characters. Molecular techniques have been used to try to overcome this problem. Description The Fiocruz-CMM utilizes morphological and/or molecular method for species’ identification. However, part of the collection has not been identified by molecular techniques and some points were unidentified. The present study employs polymerase chain reaction-based analysis of restriction fragment length polymorphisms (PCR-RFLP) to evaluate the identification of Biomphalaria in the Fiocruz-CMM, correct existing errors, assess the suitability of taxonomic synonyms, and identify unknown specimens. The results indicated that 56.7% of the mollusk specimens were correctly identified, 4.0% were wrongly identified, and 0.4% was identified under taxonomic synonyms. Additionally, the PCR-RFLP analysis identified for the first time 17.6% of the specimens in the Collection. However, 3.1% of the specimens could not be identified because the mollusk tissues were degraded, and 18.2% of the specimens were inconclusively identified, demonstrating the need for new taxonomic studies in this group. Conclusion The data was utilized to update data of Environmental Information Reference Center (CRIA). These studies demonstrate the importance of using more than one technique in taxonomic confirmation and the good preservation of specimens’ collection.
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Affiliation(s)
- Cryslaine Aguiar-Silva
- Laboratório de Helmintologia e Malacologia Médica do Centro de Pesquisas René Rachou-Fiocruz, Av. Augusto de Lima 1715, Belo Horizonte, MG 30190-002 Brasil
| | - Cristiane Lafetá Furtado Mendonça
- Laboratório de Helmintologia e Malacologia Médica do Centro de Pesquisas René Rachou-Fiocruz, Av. Augusto de Lima 1715, Belo Horizonte, MG 30190-002 Brasil ; Pontifícia Universidade Católica de Minas Gerais, Belo Horizonte, MG Brasil
| | | | - Silvia Gonçalves Mesquita
- Laboratório de Helmintologia e Malacologia Médica do Centro de Pesquisas René Rachou-Fiocruz, Av. Augusto de Lima 1715, Belo Horizonte, MG 30190-002 Brasil
| | - Omar Dos Santos Carvalho
- Laboratório de Helmintologia e Malacologia Médica do Centro de Pesquisas René Rachou-Fiocruz, Av. Augusto de Lima 1715, Belo Horizonte, MG 30190-002 Brasil
| | - Roberta Lima Caldeira
- Laboratório de Helmintologia e Malacologia Médica do Centro de Pesquisas René Rachou-Fiocruz, Av. Augusto de Lima 1715, Belo Horizonte, MG 30190-002 Brasil
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Marques DPDA, Rosa FM, Maciel E, Negrão-Corrêa D, Teles HMS, Caldeira RL, Jannotti-Passos LK, Coelho PMZ. Reduced susceptibility of a Biomphalaria tenagophila population to Schistosoma mansoni after introducing the resistant Taim/RS strain of B. tenagophila into Herivelton Martins stream. PLoS One 2014; 9:e99573. [PMID: 24941324 PMCID: PMC4062407 DOI: 10.1371/journal.pone.0099573] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Accepted: 05/15/2014] [Indexed: 11/19/2022] Open
Abstract
Studies performed in the last 30 years demonstrated that a strain of B. tenagophila from the Taim Biological Reserve is completely resistant to Schistosoma mansoni infection. This resistance to parasite infection is a dominant characteristic during crossbreeding with susceptible B. tenagophila strains. These experiments also identified a 350 bp molecular marker that is exclusive to the Taim strain and does not occur in other geographic strains of this snail species. The Taim strain (Taim/RS) of Biomphalaria tenagophila was bred on a large scale, physically marked and introduced into a stream in which previous malacological analyses had revealed the presence of only parasite-susceptible B. tenagophila. Samples of offspring captured 4, 11 and 14 months after the introduction of the Taim strain were examined, and the susceptibility of the snails to S. mansoni infection dropped from 38.6-26.5% to 2.1% during the 14 months after the introduction of the Taim snail strain. A significant correlation was also observed between the absence of infection and the identification of the Taim molecular marker. These results demonstrate that the genetic marker from the Taim strain was successfully introduced into the wild snail population. In addition, a significant relationship exists between the marker and resistance to infection.
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Affiliation(s)
| | - Florence Mara Rosa
- Laboratory of Parasitology, Institute of Biological Sciences, Federal University of Juiz de Fora, São Pedro, Minas Gerais, Brazil
| | | | - Deborah Negrão-Corrêa
- Laboratory of Schistosomiasis, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | | | - Roberta Lima Caldeira
- Laboratory of Helminthology and Medical Malacology, Research Center René Rachou/FIOCRUZ, Belo Horizonte, Minas Gerais, Brazil
| | | | - Paulo Marcos Zech Coelho
- Laboratory of Schistosomiasis, Research Center René Rachou/FIOCRUZ, Belo Horizonte, Minas Gerais, Brazil
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Al-Quraishy SA, Bin Dajem SM, Mostafa OM, Ibrahim EH, Al-Qahtani A. Development of species-specific primers for identification of Biomphalaria arabica, the intermediate host of Schistosoma mansoni in Saudi Arabia. Saudi J Biol Sci 2013; 21:65-70. [PMID: 24596501 DOI: 10.1016/j.sjbs.2013.10.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 05/26/2013] [Accepted: 10/01/2013] [Indexed: 11/29/2022] Open
Abstract
Schistosoma mansoni is mediated through the intermediate host Biomphalaria arabica which lives in Saudi Arabia. Molecular characterization and identification of this intermediate host are important for epidemiological studies of schistosomiasis. The present work aimed to determine the molecular variations among the populations of B. arabica found in Southern part of Saudi Arabia, and to develop species-specific primers for identification of these snails as a first step in the development of multiplex PCR for simultaneously identifying the snails and diagnosing its infections in a single step. Five populations of Saudi B. arabica snails were collected from freshwater bodies. Three populations were collected from Asser and two populations were collected from AL-Baha. Genomic DNA was extracted from snails and was amplified using five different RAPD-PCR primers. The banding patterns of amplified materials by primers P1 and P5 were identical in all populations. However, the rest primers displayed intra-specific differences among populations with variable degrees. Largest sizes of RAPD-PCR products were cloned into TA cloning vector as a preparatory step for DNA sequence analysis. After sequencing, similarity searches of obtained DNA sequences revealed that there are no similar sequences submitted to genebank data bases and its associated banks. The results obtained will be helpful in the development of simultaneous identification of B. arabica snails and diagnosis of S. mansoni infection within it in a single step by an implementation of multiplex PCR.
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Affiliation(s)
| | - Saad M Bin Dajem
- Biology Department, Faculty of Science, King Khaled University, Abha P.O. Box 9004, Saudi Arabia
| | - Osama M Mostafa
- Biology Department, Faculty of Science, King Khaled University, Abha P.O. Box 9004, Saudi Arabia ; Zoology Department, Faculty of Science, Ain Shams University, Abbassia 11566, Cairo, Egypt
| | - Essam H Ibrahim
- Biology Department, Faculty of Science, King Khaled University, Abha P.O. Box 9004, Saudi Arabia ; Blood Products Quality Control and Research Department, National Organization for Research and Biological Control, Cairo, Egypt
| | - Ahmed Al-Qahtani
- Department of Biological and Medical Research, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
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Heavy metal concentrations in the freshwater snail Biomphalaria alexandrina uninfected or infected with cercariae of Schistosoma mansoni and/or Echinostoma liei in Egypt: the potential use of this snail as a bioindicator of pollution. J Helminthol 2013; 88:411-6. [PMID: 23710821 DOI: 10.1017/s0022149x13000357] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
In spite of using aquatic snails as bioindicators for water pollution, little attention has been paid to the effect of parasitism upon the concentration of heavy metals (Al, Cd, Cu, Fe, Mn, Pb and Zn) in these organisms. The present study therefore aimed to compare the concentrations of heavy metals in trematode-infected Biomphalaria alexandrina collected from Kafer Alsheikh and Menofia provinces, Egypt, with uninfected snails from the same sites, in order to assess the effect of parasitism on the use of these snails as bioindicators. The concentrations of heavy metals in the soft parts and shells of snails were measured by flame atomic absorption spectrometry. The results showed that the heavy metal profile in snails infected with Echinostoma liei was very different from that in snails infected with Schistosoma mansoni. The total concentration of heavy metals in E. liei-infected snails collected from Kafer Alsheikh or Menofia province was greater than in uninfected snails. In contrast, the total concentration of heavy metals in S. mansoni-infected snails was reduced compared with uninfected snails. In conclusion, the status of snails with respect to parasitic infection must be taken into consideration when these snails are used as bioindicators.
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COLLADO GONZALOA, MENDEZ MARCOA. Phylogenetic relationships and taxonomy of Altiplano populations of Biomphalaria (Gastropoda: Planorbidae): inference from a multilocus approach. Zool J Linn Soc 2012. [DOI: 10.1111/j.1096-3642.2012.00829.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Use of indicator kriging to investigate schistosomiasis in minas gerais state, Brazil. J Trop Med 2012; 2012:837428. [PMID: 22291716 PMCID: PMC3265113 DOI: 10.1155/2012/837428] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2011] [Accepted: 09/20/2011] [Indexed: 11/17/2022] Open
Abstract
Geographic Information Systems (GISs) are composed of useful tools to map and to model the spatial distribution of events that have geographic importance as schistosomiasis. This paper is a review of the use the indicator kriging, implemented on the Georeferenced Information Processing System (SPRING) to make inferences about the prevalence of schistosomiasis and the presence of the species of Biomphalaria, intermediate hosts of Schistosoma mansoni, in areas without this information, in the Minas Gerais State, Brazil. The results were two maps. The first one was a map of Biomphalaria species, and the second was a new map of estimated prevalence of schistosomiasis. The obtained results showed that the indicator kriging can be used to better allocate resources for study and control of schistosomiasis in areas with transmission or the possibility of disease transmission.
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Teodoro TM, Jannotti-Passos LK, Carvalho ODS, Grijalva MJ, Baús EG, Caldeira RL. Hybridism between Biomphalaria cousini and Biomphalaria amazonica and its susceptibility to Schistosoma mansoni. Mem Inst Oswaldo Cruz 2011; 106:851-5. [DOI: 10.1590/s0074-02762011000700011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2011] [Accepted: 09/20/2011] [Indexed: 11/22/2022] Open
Affiliation(s)
| | | | | | - Mario J Grijalva
- Ohio University, USA; Pontifical Catholic University of Ecuador, Ecuador
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Fingerprint of Biomphalaria arabica, the intermediate host of Schistosoma mansoni in Saudi Arabia, using RAPD-PCR. Gene 2011; 485:69-72. [PMID: 21722714 DOI: 10.1016/j.gene.2011.06.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2011] [Revised: 05/28/2011] [Accepted: 06/07/2011] [Indexed: 11/20/2022]
Abstract
In the time schistosomisis control programs are implemented in many countries, schistosomiasis continues to spread throughout the world. Among these control strategies is the vector control. Within this context, analysis of the genetic variability of the intermediate host snails is important because it allows identification of specific sequences of the genome of this mollusk related to determine their fingerprint. We investigated Biomphalaria arabica, which is found in Saudi Arabia, the intermediate host of Schistosoma mansoni infection. Genetic fingerprint was studied by RAPD-PCR using our own different random primers as well as published primers. The electrophoretic patterns resulting from amplification showed specific polymorphic markers of B. arabica. This information will be helpful in the identification of the snails and demonstrating that RAPD-PCR is an appropriate and efficient methodological approach for establishment of genetic barcode development.
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Tibiriçá SHC, Mitterofhe A, Castro MFD, Lima ADC, Gonçalves M, Pinheiro IDO, Freitas CDC, Guimarães RJPDSE, Carvalho ODS, Coimbra ES. Malacological survey of Biomphalaria snails in municipalities along the Estrada Real in the southeast of the State of Minas Gerais, Brazil. Rev Soc Bras Med Trop 2011; 44:163-7. [PMID: 21556490 DOI: 10.1590/s0037-86822011005000005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2010] [Accepted: 11/04/2010] [Indexed: 11/21/2022] Open
Abstract
INTRODUCTION The increasing practice of ecotourism and rural tourism in the State of Minas Gerais, Brazil, highlights the importance of studies concerning the occurrence of potential intermediate hosts of Schistosoma mansoni. This study aimed to identify species of Biomphalaria snails in municipalities along the Estrada Real, an important Brazilian tourism project. METHODS The specimens were collected in different water collections of 36 municipalities along the Estrada Real in the southeast of the State of Minas Gerais. Biomphalaria species were characterized using both morphological and molecular approaches. The research was conducted between August 2005 and September 2009 and all the sites visited were georeferenced using GPS. RESULTS Six Biomphalaria species were found in 30 of the 36 municipalities studied: glabrata, tenagophila, straminea, peregrina, occidentalis and schrammi. The first three species of Biomphalaria, recognized as intermediate hosts of S. mansoni, were present in 33.3%, 47.2% and 8.3% of the municipalities studied, respectively. The mollusks were found in different types of water collections and no infection by S. mansoni was detected. The highest occurrence of Biomphalaria concentration was verified in the area covered by the Caminho Novo route (Diamantina/MG to Rio de Janeiro/RJ). CONCLUSIONS Considering the occurrence of schistosomiasis in the State of Minas Gerais and the socioeconomic repercussions involved in the Estrada Real Project, this work focuses on the vulnerability of water collections due to the presence of Biomphalaria mollusks and emphasizes the need for epidemiological surveillance and sanitary and educational measures integrated with the local community and tourism sectors.
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Affiliation(s)
- Sandra Helena Cerrato Tibiriçá
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brasil
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Guimarães RJDPS, Freitas CC, Dutra LV, Scholte RGC, Martins-Bedé FT, Fonseca FR, Amaral RS, Drummond SC, Felgueiras CA, Oliveira GC, Carvalho OS. A geoprocessing approach for studying and controlling schistosomiasis in the state of Minas Gerais, Brazil. Mem Inst Oswaldo Cruz 2011; 105:524-31. [PMID: 20721503 DOI: 10.1590/s0074-02762010000400030] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2009] [Accepted: 02/10/2010] [Indexed: 11/22/2022] Open
Abstract
Geographical information systems (GIS) are tools that have been recently tested for improving our understanding of the spatial distribution of disease. The objective of this paper was to further develop the GIS technology to model and control schistosomiasis using environmental, social, biological and remote-sensing variables. A final regression model (R(2) = 0.39) was established, after a variable selection phase, with a set of spatial variables including the presence or absence of Biomphalaria glabrata, winter enhanced vegetation index, summer minimum temperature and percentage of houses with water coming from a spring or well. A regional model was also developed by splitting the state of Minas Gerais (MG) into four regions and establishing a linear regression model for each of the four regions: 1 (R(2) = 0.97), 2 (R(2) = 0.60), 3 (R(2) = 0.63) and 4 (R(2) = 0.76). Based on these models, a schistosomiasis risk map was built for MG. In this paper, geostatistics was also used to make inferences about the presence of Biomphalaria spp. The result was a map of species and risk areas. The obtained risk map permits the association of uncertainties, which can be used to qualify the inferences and it can be thought of as an auxiliary tool for public health strategies.
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Caldeira RL, Teodoro TM, Gomes MFB, Carvalho ODS. Preliminary studies investigating the occurrence of Biomphalaria cousini in Brazil. Mem Inst Oswaldo Cruz 2011; 105:485-7. [PMID: 20721495 DOI: 10.1590/s0074-02762010000400022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2009] [Accepted: 11/13/2009] [Indexed: 11/21/2022] Open
Abstract
Specific genetic profiles of Brazilian Biomphalaria species were previously standardized by molecular taxonomy through the analysis of restriction fragments, which were generated by digesting the internal transcribed spacer region of rDNA with the DdeI endonuclease. Biomphalaria amazonica displayed three distinct profiles. To investigate these distinct profiles, the same molecular technique, polymerase chain reaction and restriction fragment length polymorphism, was used with different endonucleases. In addition, morphological data were also used to compare B. amazonica specimens that were collected from Brazil, Colombia and Bolivia. The morphological characters of Bolivian molluscs were similar to B. amazonica, displayed a molecular profile of five restriction fragments and morphological data, whereas the Colombian mollusc population showed morphological characters similar to Biomphalaria cousini and a molecular profile of three restriction fragments, similar to B. cousini. The Brazilian specimens showed the B. amazonica and B. cousini molecular profiles as well as a third profile, which resembled a combination of the Colombian and Bolivian molecular profiles.
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Affiliation(s)
- Roberta Lima Caldeira
- Laboratório de Helmintologia e Malacologia Médica, Instituto de Pesquisas René Rachou, Fiocruz, Belo Horizonte, MG, Brasil.
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Enk MJ, Lima ACL, Barros HDS, Massara CL, Coelho PMZ, Schall VT. Factors related to transmission of and infection with Schistosoma mansoni in a village in the South-eastern Region of Brazil. Mem Inst Oswaldo Cruz 2011; 105:570-7. [PMID: 20721510 DOI: 10.1590/s0074-02762010000400037] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2008] [Accepted: 10/08/2009] [Indexed: 11/21/2022] Open
Abstract
In this transversal study, factors related to infection with and transmission of Schistosoma mansoni were explored. Based on stool examinations of two Kato-Katz smears of a single sample, the prevalences of schistosomiasis and geohelminths were established. In a multivariable analysis, sets of demographic, socio-economic and water contact pattern variables were tested for strength of relation with infection. Males presented a 3.39-times higher risk for infection than females. The age groups between 10-19 years and 20-30 years showed risks of infection 7.1- and 7.5-times higher, respectively, than the control age group between 0-10 years. Individuals practicing leisure activities had a 1.96-times higher risk than those without these activities. The malacological survey identified snails of the species Biomphalaria glabrata, Biomphalaria straminea and Biomphalaria tenagophila. Two exemplars of B. glabrata (0.53%) proved positive for S. mansoni. The socio-economic improvements observed in the locality suggest a protective and preventive effect towards infection with schistosomiasis, which requires further investigation with a longitudinal and more detailed study design. Considering our findings, a proposal for an integrated control program should be based on two pillars: one horizontal, which involves social empowerment and health education, and another more vertical, which delivers treatment and infrastructure improvements.
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Affiliation(s)
- Martin Johannes Enk
- Laboratório de Helmintologia e Malacologia Médica, Instituto de Pesquisas René Rachou, Fiocruz, Belo Horizonte, MG, Brazil.
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Occurrence of Biomphalaria cousini (Mollusca: Gastropoda) in Brazil and its susceptibility to Schistosoma mansoni (Platyhelminths: Trematoda). Mol Phylogenet Evol 2010; 57:144-51. [DOI: 10.1016/j.ympev.2010.05.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2009] [Revised: 05/18/2010] [Accepted: 05/19/2010] [Indexed: 11/22/2022]
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Oliveira A, Da Silva D, Manzano B, Abdel-Hamid A, Marcelino M, Zanotti-Magalhes E, Magalhes L, Ribeiro-Paes J. Genetic differences between strains of Biomphalaria glabrata (Planorbidae) that are susceptible and unsusceptible to schistosomiasis. GENETICS AND MOLECULAR RESEARCH 2010; 9:1450-9. [DOI: 10.4238/vol9-3gmr821] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Scholte RGC, Caldeira RL, Simões MCM, Stutz WH, Silva LL, Carvalho ODS, Oliveira G. Inter- and intrapopulational genetic variability of Tityus serrulatus (Scorpiones, Buthidae). Acta Trop 2009; 112:97-100. [PMID: 19595660 DOI: 10.1016/j.actatropica.2009.07.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2009] [Revised: 06/25/2009] [Accepted: 07/02/2009] [Indexed: 11/26/2022]
Abstract
In Brazil, there are near 20 genera and almost 120 species of scorpions of which 95% reproduce sexually. Parthenogenetic reproduction, however, may also take place. To gain insight into useful molecular markers in parthenogenetic scorpion species, we studied DNA polymorphism using two molecular approaches: simple sequence repeat anchored polymerase chain reaction (SSR-PCR) and sequencing of the cytochrome C oxidase subunit I of the mitochondrial genome, mtDNA (COXI), of Tityus serrulatus. Three different groups were used: group 1, composed of 1 female and 14 descendants; group 2 with 1 female and 17 descendants, both from the city of Uberlândia, State of Minas Gerais (MG), Brazil, and the third group that consisted of three adult scorpions from the city of Belo Horizonte, MG. The profiles generated by SSR-PCR were identical for all specimens, while partial sequencing of COXI showed the presence of SNPs. After aligning COXI contigs, one of the groups presented 18 SNPs and the second 8 SNPs. The two groups were differentiated by two diagnostic SNPs. We did not find evidence of mitochondrial recombination. The results are in agreement with the parthenogenetic mode of reproduction of this species and sequencing of the COXI gene enabled the separation of scorpions groups.
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Pepe MS, Caldeira RL, Carvalho ODS, Muller G, Jannotti-Passos LK, Rodrigues AP, Amaral HL, Berne MEA. Biomphalaria molluscs (Gastropoda: Planorbidae) in Rio Grande do Sul, Brazil. Mem Inst Oswaldo Cruz 2009; 104:783-6. [DOI: 10.1590/s0074-02762009000500020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2008] [Accepted: 03/03/2009] [Indexed: 11/22/2022] Open
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Caldeira RL, Jannotti-Passos LK, Carvalho OS. Molecular epidemiology of Brazilian Biomphalaria: a review of the identification of species and the detection of infected snails. Acta Trop 2009; 111:1-6. [PMID: 19426656 DOI: 10.1016/j.actatropica.2009.02.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2007] [Revised: 07/23/2008] [Accepted: 02/16/2009] [Indexed: 11/18/2022]
Abstract
The three vector species of Schistosoma mansoni in Brazil, Biomphalaria glabrata, B. tenagophila and B. straminea show different susceptibility levels to the trematode besides a wide geographical distribution. The identification of such molluscs is important to further understand the disease epidemiology. Considering the fact that morphological identification may become difficult or even impossible under particular circumstances, the use of molecular-based methods have permitted the generation of more consistent information concerning the population structure of Biomphalaria furthering knowledge on taxonomy and diagnosis of infection. We have developed methodologies in order to provide simultaneous species identification of the intermediate host and diagnosis of infection with S. mansoni.
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Affiliation(s)
- Roberta L Caldeira
- Laboratório de Helmintologia e Malacologia Médica, Centro de Pesquisa René Rachou/Fiocruz, Minas Gerais, Brazil.
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Guimarães RJPS, Freitas CC, Dutra LV, Felgueiras CA, Moura ACM, Amaral RS, Drummond SC, Scholte RGC, Oliveira G, Carvalho OS. Spatial distribution of Biomphalaria mollusks at São Francisco River Basin, Minas Gerais, Brazil, using geostatistical procedures. Acta Trop 2009; 109:181-6. [PMID: 19046937 DOI: 10.1016/j.actatropica.2008.10.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2007] [Revised: 10/17/2008] [Accepted: 10/24/2008] [Indexed: 11/28/2022]
Abstract
Geostatistics is used in this work to make inferences about the presence of the species of Biomphalaria (B. glabrata, B. tenagophila and/or B. straminea), intermediate hosts of Schistosoma mansoni, at the São Francisco River Basin, in Minas Gerais, Brazil. One of these geostatistical procedures, known as indicator kriging, allows the classification of categorical data, in areas where the data are not available, using a punctual sample set. The result is a map of species and risk area definition. More than a single map of the categorical attribute, the procedure also permits the association of uncertainties of the stochastic model, which can be used to qualify the inferences. In order to validate the estimated data of the risk map, a fieldwork in five municipalities was carried out. The obtained results showed that indicator kriging is a rather robust tool since it presented a very good agreement with the field findings. The obtained risk map can be thought as an auxiliary tool to formulate proper public health strategies, and to guide other fieldwork, considering the places with higher occurrence probability of the most important snail species. Also, the risk map will enable better resource distribution and adequate policies for the mollusk control. This methodology will be applied to other river basins to generate a predictive map for Biomphalaria species distribution for the entire state of Minas Gerais.
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Affiliation(s)
- Ricardo J P S Guimarães
- Centro de Pesquisas René Rachou/FIOCRUZ-MG, Av. Augusto de Lima 1715, Barro Preto, Belo Horizonte-MG, Brazil
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Massara CL, Amaral GL, Caldeira RL, Drummond SC, Enk MJ, Carvalho ODS. Esquistossomose em área de ecoturismo do Estado de Minas Gerais, Brasil. CAD SAUDE PUBLICA 2008; 24:1709-12. [DOI: 10.1590/s0102-311x2008000700025] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2007] [Accepted: 04/28/2008] [Indexed: 11/22/2022] Open
Abstract
Neste trabalho, são discutidos os modos de transmissão da esquistossomose na localidade de São José da Serra, com 500 habitantes, no Município de Jaboticatubas, Minas Gerais, Brasil. A região ao redor recebe, durante todo o ano, milhares de pessoas para a prática de ecoturismo. A ocorrência de esquistossomose aguda em um casal que viajou para essa área, no carnaval de 2007, motivou este estudo. Exames de fezes foram feitos em 268 moradores, 53,6% da população total. Trinta e cinco (13%) estavam eliminando ovos nas fezes. Comparando os resultados coproscópicos com os de um inquérito feito em 2005, observa-se um aumento da proporção de positivos de 9,6% para 12,5%, entre 56 pessoas que participaram em ambos os estudos. Foram coletados 65 exemplares de Biomphalaria glabrata, sendo 1 (1,5%) positivo. No inquérito malacológico realizado em 2005, em 182 biomphalarias, nenhum exemplar foi encontrado positivo. Esses dados indicam a ocorrência de transmissão ativa de esquistossomose na área, revelando a necessidade de planejamento coordenado no desenvolvimento do setor turístico, incluindo a implantação de programas educativos integrados para a comunidade e, principalmente, para os turistas.
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Jannotti-Passos LK, Magalhães KG, Carvalho OS, Vidigal THDA. Multiplex PCR for both identification of Brazilian Biomphalaria species (Gastropoda: Planorbidae) and diagnosis of infection by Schistosoma mansoni (Trematoda: Schistosomatidae). J Parasitol 2006; 92:401-3. [PMID: 16729704 DOI: 10.1645/ge-593r1.1] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
A simple and single-step technique based on multiplex PCR (multiplex polymerase chain reaction) has been developed for simultaneous identification of Brazilian Biomphalaria species, the intermediate hosts of Schistosoma mansoni, and their diagnosis of infection by the trematode. We used species-specific primers directed both to the internal transcribed spacer 2 (ITS2) of ribosomal DNA from 3 of the S. mansoni host species and to the mitochondrial DNA (mtDNA) from the trematode. Those primers were used simultaneously in a single multiplex-PCR reaction, and template DNA was obtained from S. mansoni-infected and noninfected snails. The results were visualized in silver stained polyacrylamide gels, revealing the presence of specific bands. The methodology has shown to be efficient, fast, and reproducible for Biomphalaria species identification and diagnosis of snails infected by S. mansoni during prepatent periods.
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Affiliation(s)
- Liana K Jannotti-Passos
- Centro de Pesquisas René Rachou-Fiocruz, Av. Augusto de Lima 1715, 30190-002 Belo Horizonte, MG, Brazil.
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Cardoso PCM, Caldeira RL, Lovato MB, Coelho PMZ, Berne MEA, Müller G, Carvalho ODS. Genetic variability of Brazilian populations of Lymnaea columella (Gastropoda: Lymnaeidae), an intermediate host of Fasciola hepatica (Trematoda: Digenea). Acta Trop 2006; 97:339-45. [PMID: 16469288 DOI: 10.1016/j.actatropica.2006.01.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2005] [Revised: 12/02/2005] [Accepted: 01/02/2006] [Indexed: 11/15/2022]
Abstract
In Brazil, Lymnaea columella is the most important intermediate host of Fasciola hepatica, the etiological agent of fasciolosis, which is a parasitic disease of veterinarian and human importance. Random amplified polymorphic DNA (RAPD) was used to investigate the genetic variability within and among nine Brazilian populations of L. columella comprising 205 individuals. A number of four primers were used for analysis of molecular variance (AMOVA). Out of 83 RAPD markers, 63 (76%) were polymorphic and revealed 119 unique RAPD profiles. The levels of genetic variability found in the populations were low and most of the genetic variation was interpopulational (81.6%) when compared to intrapopulational variability (18.4%). These results are in accordance with the dynamics and distribution of the populations analyzed.
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Affiliation(s)
- Paula Cristina Marques Cardoso
- Oswaldo Cruz Foundation, Laboratório de Helmintoses Intestinais, Centro de Pesquisas René Rachou-Fiocruz, Avenida Augusto de Lima 1715, Barro Preto MG 30190-002, Belo Horizonte, Minas Gerais, Brazil
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Lotfy WM, DeJong RJ, Black BS, Loker ES. Specific identification of Egyptian Biomphalaria species and possible hybrids using the polymerase chain reaction based on nuclear and mitochondrial loci. Mol Cell Probes 2004; 19:21-5. [PMID: 15652216 DOI: 10.1016/j.mcp.2004.08.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2004] [Revised: 08/05/2004] [Accepted: 08/06/2004] [Indexed: 12/01/2022]
Abstract
The snail historically implicated in the transmission of Schistosoma mansoni in Egypt is Biomphalaria alexandrina. The problem of schistosomiasis in Egypt has been complicated in recent years by the introduction of Biomphalaria glabrata, which has been reported to hybridize with B. alexandrina. Both introduced and hybrid snails also pose a threat with respect to S. mansoni transmission. As morphological differentiation of these snails is difficult, using three DNA loci, nuclear ITS1 and ITS2, and mitochondrial ND1, PCR-based assays were developed to identify these species and possible hybrids. The assays are rapid, reproducible, sensitive and specific. This technique may be used in field surveys to study the distribution of the two species of intermediate host and their putative hybrids in Egypt.
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Affiliation(s)
- Wael M Lotfy
- Department of Biology, University of New Mexico, Albuquerque, NM 87131, USA.
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Vidigal THDA, Magalhães KG, Carvalho Od ODS. Polymerase chain reaction and restriction fragment length polymorphism analysis of the ITS2 region for differatiation of Brazilian Biomphalaria intermediate hosts of the Schistosoma mansoni. Rev Soc Bras Med Trop 2004; 37:351-3. [PMID: 15334271 DOI: 10.1590/s0037-86822004000400012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We sequenced the internal transcribed spacer 2 of the ribosomal DNA (ITS2-DNAr) from the three Schistosoma mansoni intermediate hosts in Brazil: Biomphalaria glabrata, Biomphalaria tenagophila and Biomphalaria straminea. Analysis of a restriction map from those sequences allowed us to select putative restriction enzymes able to identify the snail species under study. Four restriction enzymes were used and HpaII provided simple species-specific profiles easily visualized in polyacrylamide gels. The use of ITS2 is advantageous as it provides a small fragment of 460 bp which may be easily amplified by PCR. In the current work, we showed that the amplification of ITS2-DNAr together with HpaII enzyme restriction is an auxiliary molecular tool for the morphological identification of such snails as well as for taxonomic and phylogenetic studies of neotropical planorbids.
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Carvalho OS, Cardoso PCM, Lira PM, Rumi A, Roche A, Berne E, Müller G, Caldeira RL. The use of the polymerase chain reaction and restriction fragment length polymorphism technique associated with the classical morphology for characterization of Lymnaea columella, L. viatrix, and L. diaphana (Mollusca: Lymnaeidae). Mem Inst Oswaldo Cruz 2004; 99:503-7. [PMID: 15543414 DOI: 10.1590/s0074-02762004000500008] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The specific identification of Lymnaeid snails is based on a comparison of morphological characters of the shell, radula, renal and reproductive organs. However, the identification is complicated by dissection process, intra and interspecific similarity and variability of morphological characters. In the present study, polymerase chain reaction and restriction fragment length polymorphism (PCR-RFLP) techniques targeted to the first and second internal transcribed spacers (ITS1 and ITS2) rDNA and to the mitochondrial 16S ribosomal gene (16S rDNAmt) were used to differentiate the species Lymnaea columella, L. viatrix, and L. diaphana from some localities of Brazil, Argentina, and Uruguay as well as to verify whether the molecular results corroborates the classical morphological method.PCR-RFLP analysis of the ITS1, ITS2, and 16S using 12 restriction enzymes revealed characteristic patterns for L. columella and L. diaphana which were concordant with the classical morphology. On the other hand, for L. viatrix populations a number of 1 to 6 profiles were generated while morphology provided the species pattern results.
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Affiliation(s)
- Omar S Carvalho
- Laboratório de Helmintoses Intestinais, Centro de Pesquisas René Rachou-Fiocruz, Av. Augusto de Lima 1715, 30190-002 Belo Horizonte, MG, Brazil.
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Enk MJ, Caldeira RL, Carvalho OS, Schall VT. Rural tourism as risk factor for the transmission of schistosomiasis in Minas Gerais, Brazil. Mem Inst Oswaldo Cruz 2004; 99:105-8. [PMID: 15486645 DOI: 10.1590/s0074-02762004000900019] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Recently, the booming rural tourism in endemic areas of the state of Minas Gerais was identified as a contributing factor in the dissemination of the infection with Schistosoma mansoni. This article presents data from six holiday resorts in a rural district approximately 100 km distant from Belo Horizonte, MG, Brazil, where a possibly new and until now unperceived way of transmission was observed. The infection takes place in swimming pools and little ponds, which are offered to tourists and the local population for fishing and leisure activities. The health authorities of the district reported cases of schistosomiasis among the local population after visiting these sites. As individuals of the non-immune middle class parts of the society of big urban centers also frequent these resorts, infection of these persons cannot be excluded. A malacological survey revealed the presence of molluscs of the species Biomphalaria glabrata and Biomphalaria straminea at the resorts. The snails (B. glabrata) of one resort tested positive for S. mansoni. In order to resolve this complex problem a multidisciplinary approach including health education, sanitation measures, assistance to the local health services, and evolvement of the local political authorities, the local community, the tourism association, and the owners of the leisure resorts is necessary. This evidence emphasizes the urgent need for a participative strategic plan to develop the local tourism in an organized and well-administered way. Only so this important source of income for the region can be ensured on the long term without disseminating the disease and putting the health of the visitors at risk.
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Affiliation(s)
- Martin J Enk
- Laboratório de Educação em Saúde, Centro de Pesquisas René Rachou-Fiocruz, Av. Augusto de Lima 1715, 30190-002 Belo Horizonte, MG, Brazil
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Vidigal THDA, Spatz L, Kissinger JC, Redondo RAF, Pires ECR, Simpson AJG, Carvalho OS. Analysis of the first and second internal transcribed spacer sequences of the ribosomal DNA in Biomphalaria tenagophila complex (Mollusca: Planorbidae). Mem Inst Oswaldo Cruz 2004; 99:153-8. [PMID: 15250468 DOI: 10.1590/s0074-02762004000200007] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The first and second internal transcribed spacer regions (ITS1 and ITS2) of the ribosomal DNA of Biomphalaria tenagophila complex (B. tenagophila, B. occidentalis, and B. t. guaibensis) were sequenced and compared. The alignment lengths of these regions were about 655 bp and 481 bp, respectively. Phylogenetic relationships among the Biomphalaria species were inferred by Maximum Parsimony and Neighbor-joining methods. The phylogenetic trees produced, in most of the cases, were in accordance with morphological systematics and other molecular data previously obtained by polymerase chain reaction and restriction fragment length polymorphism analysis. The present results provide support for the proposal that B. tenagophila represents a complex comprising B. tenagophila, B. occidentalis and B. t. guaibensis.
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Affiliation(s)
- Teofânia H D A Vidigal
- Centro de Pesquisas René Rachou-Fiocruz, Av. Augusto de Lima, 1715, 30190-002 Belo Horizonte, MG, Brasil
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Rosa FM, Caldeira RL, Carvalho ODS, Godard ALB, Coelho PMZ. Dominant character of the molecular marker of a Biomphalaria tenagophila strain (Mollusca: Planorbidae) resistant to Schistosoma mansoni. Mem Inst Oswaldo Cruz 2004; 99:85-7. [PMID: 15057353 DOI: 10.1590/s0074-02762004000100015] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Biomphalaria tenagophila population from Taim (state of Rio Grande do Sul, Brazil) is totally resistant to Schistosoma mansoni, and presents a molecular marker of 350 bp by polymerase chain reaction and restriction fragment length polymorphism of the entire rDNA internal transcriber spacer. The scope of this work was to determine the heritage pattern of this marker. A series of cross-breedings between B. tenagophila from Taim (resistant) and B. tenagophila from Joinville, state of Santa Catarina (susceptible) was carried out, and their descendants F1 and F2 were submitted to this technique. It was possible to demonstrate that the specific fragment from Taim is endowed with dominant character, since the obtained segregation was typically mendelian.
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Affiliation(s)
- Florence Mara Rosa
- Departamento de Parasitologia, Instituto de Ciências Biológicas, UFMG, Belo Horizonte, MG, Brasil
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Caldeira RL, Carvalho OS, Mendonça CL, Graeff-Teixeira C, Silva MC, Ben R, Maurer R, Lima WS, Lenzi HL. Molecular differentiation of Angiostrongylus costaricensis, A. cantonensis, and A. vasorum by polymerase chain reaction- restriction fragment length polymorphism. Mem Inst Oswaldo Cruz 2003; 98:1039-43. [PMID: 15049087 DOI: 10.1590/s0074-02762003000800011] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Angiostrongylus cantonensis, A. costaricensis, and A. vasorum are etiologic agents of human parasitic diseases. Their identification, at present, is only possible by examining the adult worm after a 40-day period following infection of vertebrate hosts with the third-stage larvae. In order to obtain a diagnostic tool to differentiate larvae and adult worm from the three referred species, polymerase chain reaction-restriction fragment length polymorphism was carried out. The rDNA second internal transcribed spacer (ITS2) and mtDNA cytochrome oxidase I regions were amplified, followed by digestion of fragments with the restriction enzymes RsaI, HapII, AluI, HaeIII, DdeI and ClaI. The enzymes RsaI and ClaI exhibited the most discriminating profiles for the differentiation of the regions COI of mtDNA and ITS2 of rDNA respectively. The methodology using such regions proved to be efficient for the specific differentiation of the three species of Angiostrongylus under study.
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Affiliation(s)
- Roberta L Caldeira
- Laboratório de Helmintoses Intestinais, Centro de Pesquisas René Rachou-Fiocruz, Av. Augusto de Lima 1715, 30190-002 Belo Horizonte, MG, Brasil
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Vidigal THDA, Montresor LC, Simpson AJG, Carvalho OS. Polymerase chain reaction and restriction fragment length polymorphism of cytocrome oxidase subunit I used for differentiation of Brazilian Biomphalaria species intermediate host of Schistosoma mansoni. Mem Inst Oswaldo Cruz 2003; 97 Suppl 1:47-52. [PMID: 12426594 DOI: 10.1590/s0074-02762002000900011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The intermediate hosts of Schistosoma mansoni, in Brazil, Biomphalaria glabrata, B. tenagophila and B. straminea, were identified by restriction fragment length polymorphism analysis of the mitochondrial gene cytochrome oxidase I (COI). We performed digestions with two enzymes (AluI and RsaI), previously selected, based on sequences available in Genbank. The profiles obtained with RsaI showed to be the most informative once they were polymorphic patterns, corroborating with much morphological data. In addition, we performed COI digestion of B. straminea snails from Uruguay and Argentina.
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Affiliation(s)
- Teofânia H D A Vidigal
- Laboratório de Helmintoses Intestinais, Centro de Pesquisas René Rachou, Fiocruz, Belo Horizonte, MG, Brasil
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Spada RGM, da Silva D, Abdel-Hamid AZ, Sobral-Hamaguchi SS, Zuim NRB, Zanotti-Magalhaes EM, Magalhaes LA, Ribeiro-Paes JT. Genetic markers between Biomphalaria glabrata snails susceptible and resistant to Schistosoma mansoni infection. Mem Inst Oswaldo Cruz 2003; 97 Suppl 1:53-8. [PMID: 12426595 DOI: 10.1590/s0074-02762002000900012] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The analysis of the genetic variability related to susceptibility to Schistosoma mansoni infection in the vector of the genus Biomphalaria is important in terms of a better understanding of the epidemiology of schistosomiasis itself, the possible pathological implications of this interaction in vertebrate hosts, and the formulation of new strategies and approaches for disease control. In the present study, the genetic variability of B. glabrata strains found to be resistant or susceptible to S. mansoni infection was investigated using DNA amplification by random amplified polymorphic DNA-polymerase chain reaction (RAPD-PCR). The amplification products were analyzed on 8% polyacrylamide gel and stained with silver. We selected 10 primers, since they have previously been useful to detect polymorphism among B. glabrata and/or B. tenagophila. The results showed polymorphisms with 5 primers. Polymorphic bands observed only in the susceptible strain. The RAPD-PCR methodology represents an adequate approach for the analysis of genetic polymorphisms. The understanding of the genetic polymorphisms associated to resistance may contribute to the future identification of genomic sequences related to the resistance/susceptibility of Biomphalaria to the larval forms of S. mansoni and to the development of new strategies for the control of schistosomiasis.
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Affiliation(s)
- R G M Spada
- Departamento de Ciências Biológicas, Unesp, Assis, SP, 19806-900, Brasil
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Vidigal THDA, Magalhães KG, Kissinger JC, Caldeira RL, Simpson AJG, Carvalho OS. A Multiplex-PCR approach to identification of the Brazilian intermediate hosts of Schistosoma mansoni. Mem Inst Oswaldo Cruz 2003; 97 Suppl 1:95-7. [PMID: 12426601 DOI: 10.1590/s0074-02762002000900019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Due to difficulties concerning morphological identification of planorbid snails of the genus Biomphalaria, and given a high variation of characters and in the organs with muscular tissue, we designed specific polymerase chain reaction (PCR) primers for Brazilian snail hosts of Schistosoma mansoni from available sequences of internal transcribed spacer 2 (ITS2) of the ribosomal RNA gene. From the previous sequencing of the ITS2 region, one primer was designed to anchor in the 5.8S conserved region and three other species-specific primers in the 28S region, flanking the ITS2 region. These four primers were simultaneously used in the same reaction (Multiplex-PCR), under high stringency conditions. Amplification of the ITS2 region of Biomphalaria snails produced distinct profiles (between 280 and 350 bp) for B. glabrata, B. tenagophila and B. straminea. The present study demonstrates that Multiplex-PCR of ITS2-DNAr showed to be a promising auxiliary tool for the morphological identification of Biomphalaria snails, the intermediate hosts of S. mansoni.
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Affiliation(s)
- T H D A Vidigal
- Departamento de Zoologia, Instituto de Ciências Biológicas, UFMG, Belo Horizonte, MG, Brasil
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Velasquez LE, Caldeira RL, Estrada V, Carvalho OS. Morphological and polymerase chain reaction-restriction fragment lenght polymorphism characterization of Biomphalaria kuhniana and Biomphalaria amazonica from Colombia. Mem Inst Oswaldo Cruz 2002; 97:997-1004. [PMID: 12471427 DOI: 10.1590/s0074-02762002000700012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
In Colombia, five Biomphalaria planorbid species are known: B. kuhniana, B. straminea, B. peregrina, B. canonica and B. oligoza(var. B. philippiana). Among them, B. straminea is intermediate host of Schistosoma mansoni and B. peregrina has been found to be experimentally susceptible to this parasite. B. straminea is commonly confused with B. kuhniana and they have been clustered together with B. intermedia in the complex named B. straminea. The difficulties involved in the specific identification, based on morphological data, have motivated the use of new techniques as auxiliary tools in cases of inconclusive morphological identification of such planorbid. In the present study, five Biomphalaria populations from the Colombian Amazon region and from Interandian Valleys were morphologically identified and characterized by polymerase chain reaction-restriction fragment lenght polymorphism directed at the internal transcribed spacer region of the rRNA gene, followed by digestion of the generated fragment with restriction enzymes (DdeI, AluI, RsaI, MvaI and HaeIII). Known profiles of the Brazilian species B. straminea, B. peregrina, B. kuhniana, B. intermedia and B. amazonica, besides B. kuhniana from Colombia, were used for comparison. The five populations under study were morphologically and molecularly identified as B. kuhniana and B. amazonica.
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Affiliation(s)
- Luz E Velasquez
- Laboratorio de Malacología Medica, Universidad de Antioquia, Colombia
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Campos YR, Carvalho OS, Goveia CO, Romanha AJ. Genetic variability of the main intermediate host of the Schistosoma mansoni in Brazil, Biomphalaria glabrata (Gastropoda: Planorbidae) assessed by SSR-PCR. Acta Trop 2002; 83:19-27. [PMID: 12062789 DOI: 10.1016/s0001-706x(02)00051-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The genetic variability of Brazilian Biomphalaria glabrata populations was studied using SSR-PCR. This technique is a variant of the polymerase chain reaction (PCR), which consists of using a single primer directed towards microsatellite regions under high stringency reaction conditions. Twenty snails of each population from eight distant Brazilian localities were analyzed. Morphology and PCR-RFLP were used for previous specific identification of the snails. Bands generated after gel electrophoresis of the SSR-PCR products of each snail were used to study intra- and interpopulation genetic variability. Fifty-five prominent bands were considered in a pairwise band comparison for the determination of genetic variability. Genetic variability was greater between populations than within populations. Snail populations from the field and the laboratory presented almost no genetic differences. No relationship between genetic variability and geographic distance was found. SSR-PCR proved to be a good alternative molecular tool for the population study of B. glabrata.
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Affiliation(s)
- Y R Campos
- Centro de Pesquisas René Rachou-FIOCRUZ, Avenida Augusto de Lima 1715, Barro Preto, CEP 30190-002, MG, Belo Horizonte, Brazil
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Vidigal TH, Caldeira RL, Simpson AJ, Carvalho OS. Identification of Biomphalaria havanensis and Biomphalaria obstructa populations from Cuba using polymerase chain reaction and restriction fragment length polymorphism of the ribosomal RNA intergenic spacer. Mem Inst Oswaldo Cruz 2001; 96:661-5. [PMID: 11500766 DOI: 10.1590/s0074-02762001000500013] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In Cuba, several Biomphalaria species have been reported such as B. orbignyi, B. schrammi, B. helophila, B. havanensis and B. peregrina; only the latter three are considered as potential hosts of Schistosoma mansoni. The specific identification of Biomphalaria species is based on anatomical and morphological characters of genital organs and shells. The correct identification of these snails is complicated by the high variation in these characters, similarity among species and in some cases by the small size of the snails. In this paper, we reported the classical morphological identification, the use of PCR and RFLP analysis of the internal transcribed spacer region of the ribosomal RNA genes for molecular identification of seven snail populations from different localities in Cuba. Using morphological and molecular analysis, we showed that among the studied Cuban Biomphalaria populations only B. havanensis and B. obstructa species were found.
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Affiliation(s)
- T H Vidigal
- Departamento de Zoologia, UFMG, Belo Horizonte, MG, Brasil
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Caldeira RL, Vidigal TH, Simpson AJ, Carvalho OS. Genetic variability in Brazilian populations of Biomphalaria straminea complex detected by simple sequence repeat anchored polymerase chain reaction amplification. Mem Inst Oswaldo Cruz 2001; 96:535-44. [PMID: 11391428 DOI: 10.1590/s0074-02762001000400016] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Biomphalaria glabrata, B. tenagophila and B. straminea are intermediate hosts of Schistosoma mansoni, in Brazil. The latter is of epidemiological importance in the northwest of Brazil and, due to morphological similarities, has been grouped with B. intermedia and B. kuhniana in a complex named B. straminea. In the current work, we have standardized the simple sequence repeat anchored polymerase chain reaction (SSR-PCR) technique, using the primers (CA)8RY and K7, to study the genetic variability of these species. The similarity level was calculated using the Dice coefficient and genetic distance using the Nei and Li coefficient. The trees were obtained by the UPGMA and neighbor-joining methods. We have observed that the most related individuals belong to the same species and locality and that individuals from different localities, but of the same species, present clear heterogeneity. The trees generated using both methods showed similar topologies. The SSR-PCR technique was shown to be very efficient in intrapopulational and intraspecific studies of the B. straminea complex snails.
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Affiliation(s)
- R L Caldeira
- Centro de Pesquisas René Rachou, Fiocruz, Belo Horizonte, MG, 30190-002, Brasil
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Souza CP, Caldeira RL, Drummond SC, Melo AL, Guimarães CT, Soares D, Carvalho O. Geographical distribution of Biomphalaria snails in the State of Minas Gerais, Brazil. Mem Inst Oswaldo Cruz 2001; 96:293-302. [PMID: 11313634 DOI: 10.1590/s0074-02762001000300003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Published and unpublished observations on geographical distribution of Biomphalaria snails in the State of Minas Gerais, Brazil, were compiled. This work is aimed at knowing the present occurrence of Biomphalaria species in this region, and at contributing to the elaboration of the planorbid chart of Minas Gerais. In malacological surveys, performed by several researchers, the presence of seven species of this genus was recorded. Those planorbids were found in 12 mesoregions, in 283 (33.1%) municipalities out of 853 with the following distribution: B. glabrata (185 municipalities), B. straminea (125), B. tenagophila (58), B. peregrina (57), B. schrammi (26), B. intermedia (20) and B. occidentalis (2). B. glabrata and B. tenagophila are found naturally infected by Schistosoma mansoni in Minas Gerais. In 24 municipalities the three snail hosts of S. mansoni in Brazil, B. glabrata, B. tenagophila and B. straminea, are present.
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Affiliation(s)
- C P Souza
- Laboratório de Malacologia, Centro de Pesquisas René Rachou, Fiocruz, Belo Horizonte, MG, 30190-002, Brasil.
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Spatz L, Vidigal TH, Silva MC, Cappa SM, Carvalho OS. Characterization of Biomphalaria orbignyi, Biomphalaria peregrina and Biomphalaria oligoza by polymerase chain reaction and restriction enzyme digestion of the internal transcribed spacer region of the RNA ribosomal gene. Mem Inst Oswaldo Cruz 2000; 95:807-14. [PMID: 11080765 DOI: 10.1590/s0074-02762000000600010] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The correct identification of Biomphalaria oligoza, B. orbignyi and B. peregrina species is difficult due to the morphological similarities among them. B. peregrina is widely distributed in South America and is considered a potential intermediate host of Schistosoma mansoni. We have reported the use of the polymerase chain reaction and restriction fragment length polymorphism analysis of the internal transcribed spacer region of the ribosomal DNA for the molecular identification of these snails. The snails were obtained from different localities of Argentina, Brazil and Uruguay. The restriction patterns obtained with MvaI enzyme presented the best profile to identify the three species. The profiles obtained with all enzymes were used to estimate genetic similarities among B. oligoza, B. peregrina and B. orbignyi. This is also the first report of B. orbignyi in Uruguay.
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Affiliation(s)
- L Spatz
- Departamento de Microbiología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
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