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Search Results: 1 - 10 of 13334 matches for " érika Monteiro;Dias "
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Lutzomyia longipalpis naturally infected by Leishmania (L.) chagasi in Várzea Grande, Mato Grosso State, Brazil, an area of intense transmission of visceral leishmaniasis
Missawa, Nanci A.;Michalsky, érika Monteiro;Fortes-Dias, Consuelo Latorre;Santos Dias, Edelberto;
Cadernos de Saúde Pública , 2010, DOI: 10.1590/S0102-311X2010001200020
Abstract: the american visceral leishmaniasis (avl) is caused by parasites belonging to the genus leishmania (trypanosomatidae) and is transmitted to humans through the bite of certain species of infected phlebotomine sand flies. in this study, we investigated the natural infection ratio of lutzomyia longipalpis, the main vector species of avl in brazil, in várzea grande, mato grosso state. between july 2004 and june 2006, phlebotomine sand flies were captured in peridomestic areas using cdc light-traps. four hundred and twenty (420) specimens of lu. longipalpis were captured. 42 pools, containing 10 specimens of lu. longipalpis each, were used for genomic dna extraction and pcr (polymerase chain reaction) amplification. leishmania spp. dna was detected in three out of the 42 pools tested, resulting in a minimal infection ratio of 0.71%. restriction fragment length polymorphism (rflp) analysis indicated that leishmania (l.) chagasi was the infective agent in the positive pools.
Study on phlebotomine sand fly (Diptera: Psychodidae) fauna in Belo Horizonte, state of Minas Gerais, Brazil
Souza, Carina Margonari de;Pessanha, Jose Eduardo;Barata, Ricardo Andrade;Monteiro, érika Michalsky;Costa, Daniela Carmargos;Dias, Edelberto Santos;
Memórias do Instituto Oswaldo Cruz , 2004, DOI: 10.1590/S0074-02762004000800003
Abstract: a study on the phlebotomine sand fly fauna in belo horizonte city, state of minas gerais, brazil, was carried out. from april 2001 to march 2003, monthly systematic collections were performed in three houses from each of the nine regions of the city, using cdc light traps for four consecutive days. the traps were set into the houses and in peridomestic areas totaling 54 traps. a number of 3871 sand fly specimens of the genera lutzomyia and brumptomyia were collected. sixty eight percent of the specimens were l. longipalpis and 16% l. whitmani, insect vectors of visceral and american cutaneous leishmaniasis, respectively. environmental factors such as temperature, humidity, and frequency of precipitation suggest that the number of insects increases after rainy periods. during the same period mentioned above, seasonal captures were carried out in parks and green areas of belo horizonte, using shannon trap. a total of 579 phlebotomine sand flies were collected from which 398 (68.7%) were females with the predominance of l. whitmani and l. monticola. those specimens were used for natural infection examination, by polymerase chain reaction. no leishmania dna was present in any of the specimens tested.
Evidência de transmiss?o de leishmaniose visceral por Lutzomyia cruzi no município de Jaciara, Estado de Mato Grosso, Brasil
Missawa, Nanci Akemi;Veloso, Márcia Aurélia Esser;Maciel, Giovana Belem Moreira Lima;Michalsky, érika Monteiro;Dias, Edelberto Santos;
Revista da Sociedade Brasileira de Medicina Tropical , 2011, DOI: 10.1590/S0037-86822011000100017
Abstract: introduction: the municipality of jaciara was classified in 2003 as a transmission area for visceral leishmaniasis in outbreak situations. this study aimed to establish evidence of transmission of leishmania (leishmania) infantum chagasi by lutzomyia cruzi in the municipality of jaciara, state of mato grosso, brazil. methods: this municipality is located 127 km from the state capital (cuiabá) and is an important center for ecotourism practitioners. females of lutzomyia cruzi, captured using cdc traps, were dissected to confirm the species and stored at -20oc in pools of 10 individuals for dna extraction, generic pcr, specific rflp and electrophoresis on polyacrylamide gel. results: the entomological survey showed abundant occurrence of lutzomyia cruzi and absence of lutzomyia longipalpis (the main vector for leishmania (leishmania) infantum chagasi). one of the three samples showed a characteristic dna band from leishmania (120 bp) in generic pcr. to confirm the leishmania species via rflp, positive controls for leishmania (leishmania) amazonensis, leishmania (viannia) braziliensis and leishmania (leishmania) infantum chagasi digested with restriction enzyme haeiii were used. a pattern of bands similar to leishmania (leishmania) infantum chagasi was found in one sample, thus confirming the detection of natural infection with leishmania (leishmania) infantum chagasi in lutzomyia cruzi. conclusions: the occurrences of positive cases in humans and dogs, the presence of lutzomyia cruzi and the absence of lutzomyia longipalpis together with the detection of natural infection with leishmania (leishmania) infantum chagasi, indicate that lutzomyia cruzi participates in visceral leishmaniasis transmission in jaciara, state of mato grosso, brazil.
Association of Lutzomyia longipalpis (Diptera: Psychodidae) population density with climate variables in Montes Claros, an area of American visceral leishmaniasis transmission in the state of Minas Gerais, Brazil
Michalsky, érika Monteiro;Fortes-Dias, Consuelo Latorre;Fran?a-Silva, Jo?o Carlos;Rocha, Marilia Fonseca;Barata, Ricardo Andrade;Dias, Edelberto Santos;
Memórias do Instituto Oswaldo Cruz , 2009, DOI: 10.1590/S0074-02762009000800020
Abstract: in the present paper, we evaluate the relationship between climate variables and population density of lutzomyia longipalpis in montes claros, an area of active transmission of american visceral leishmaniasis (avl) in brazil. entomological captures were performed in 10 selected districts of the city, between september 2002-august 2003. a total of 773 specimens of l. longipalpiswere captured in the period and the population density could be associated with local climate variables (cumulative rainfall, average temperature and relative humidity) through a mathematical linear model with a determination coefficient (rsqr) of 0.752. although based on an oversimplified statistical analysis, as far as the vector is concerned, this approach showed to be potentially useful as a starting point to guide control measures for avl in montes claros.
Flebotomíneos (Diptera: Psychodidae) de um foco de leishmaniose tegumentar no Estado de Minas Gerais
Dias, Edelberto Santos;Fran?a-Silva, Jo?o Carlos;Silva, Jaime Costa da;Monteiro, érika Michalsky;Paula, Kenia Maria de;Gon?alves, Caroline Macedo;Barata, Ricardo Andrade;
Revista da Sociedade Brasileira de Medicina Tropical , 2007, DOI: 10.1590/S0037-86822007000100009
Abstract: between january and december 2000, systematic monthly capture of phlebotomine sandflies was undertaken by means of light traps of cdc type in brejo do mutambal, an endemic area for american cutaneous leishmaniasis located in the municipality of varzelandia, state of minas gerais. nineteen phlebotomine species were captured, totaling 6,756 specimens. the species correlated with acl transmission were captured in low numbers, as follows: lutzomyia intermedia (5.1%), l. migonei (0.4%) and l. whitmani (0.1%). lutzomyia longipalpis was the predominant species captured (34.8%), thus also suggesting a risk of visceral leishmaniasis transmission. the proportion of sandflies captured in areas surrounding homes was 91.7 % while 8.3% were captured inside homes. the interference of climatic factors (temperature, relative air humidity and rainfall) on phlebotomine population dynamics was evaluated.
Phlebotominae distribution in Janaúba, an area of transmission for visceral leishmaniasis in Brazil
Michalsky, érika Monteiro;Fran?a-Silva, Jo?o Carlos;Barata, Ricardo Andrade;Lara e Silva, Fabiana de Oliveira;Loureiro, Angélica Marciano Fernandes;Fortes-Dias, Consuelo Latorre;Dias, Edelberto Santos;
Memórias do Instituto Oswaldo Cruz , 2009, DOI: 10.1590/S0074-02762009000100009
Abstract: in brazil, visceral leishmaniasis (vl) is caused by leishmania chagasi parasites that are transmitted to man through the bites of infected females of lutzomyia longipalpis sand flies. in order to evaluate transmission risk and to clarify the epidemiology of this tropical disease, studies focused on the vector and favorable environmental conditions are of fundamental importance. in this work, we surveyed the phlebotomine sand fly fauna in janaúba, a brazilian municipality that is endemic for vl. during a two-year period, entomological captures were performed monthly in 15 districts with high, moderate and low profiles of vl transmission. a total of 14,591 phlebotomine sand flies were captured (92% l. longipalpis), with a predominance of males. most specimens were captured in the peri-domicile setting, although the number of specimens captured in the intra-domicile setting emphasises the anthropophilic behaviour of this insect. the population density of l. longipalpis was modulated by climate variations, particularly with clear increases immediately after the rainy season. however, the pattern of distribution did not coincide with the occurrence of human or canine cases of vl. this suggests that the eco-epidemiology of vl is particular to each area of transmission and must be taken into account during the design of public health control actions.
Phlebotomine sand flies in Porteirinha, an area of American visceral leishmaniasis transmission in the State of Minas Gerais, Brazil
Barata, Ricardo Andrade;Silva, Jo?o Carlos Fran?a da;Costa, Roberto Teodoro da;Fortes-Dias, Consuelo Latorre;Silva, Jaime Costa da;Paula, Edvá Vieira de;Prata, Aluízio;Monteiro, érika Michalsky;Dias, Edelberto Santos;
Memórias do Instituto Oswaldo Cruz , 2004, DOI: 10.1590/S0074-02762004000500004
Abstract: a study of the phlebotomine sand fly fauna was carried out in an endemic area of american visceral leishmaniasis (avl) in the municipality of porteirinha, in the brazilian state of minas gerais. captures were performed with cdc light traps in 7 districts, 5 days per month, during 2 consecutive years (january 2000 to december 2001). a total of 3240 sand flies were captured and identified. sixteen species were found, among which 15 belonged to the genus lutzomyia and one to the genus brumptomyia. lutzomyia longipalpis, a proven vector of avl, was the predominant species (71.85%) throughout the time period. the interference of climatic factors (temperature, humidity, and rainfall) over the populational dynamics of the sand flies was determined. statistical analysis of the data showed a significant correlation among the number of phlebotomine sand flies collected, rainfall, and humidity, whereas the effect of temperature was negligible, in that particular region. the amount of collected phlebotomine, the number of human cases, and the prevalence of canine avl in the districts of porteirinha are discussed.
Infec??o natural de Lutzomyia (Lutzomyia) longipalpis (Diptera: Psychodidae) por Leishmania infantum chagasi em flebotomíneos capturados no município de Janaúba, Estado de Minas Gerais, Brasil
Michalsky, érika Monteiro;Guedes, Karla de Sena;Lara e Silva, Fabiana de Oliveira;Fran?a-Silva, Jo?o Carlos;Dias, Consuelo Latorre Fortes;Barata, Ricardo Andrade;Dias, Edelberto Santos;
Revista da Sociedade Brasileira de Medicina Tropical , 2011, DOI: 10.1590/S0037-86822011000100014
Abstract: introduction: visceral leishmaniasis has been notified in nearly all states of brazil, and particularly in the north of minas gerais, where the disease is endemic. the aim of this study was to detect natural infection of lutzomyia longipalpis and, through the pcr/rflp technique, identify leishmania species found in sandflies in the municipality of janaúba. methods: using light traps, 1,550 females of l. longipalpis were caught and grouped into pools of 10 specimens to be subjected to dna extraction and amplification, by means of generic pcr and cacophony. results: out of the 155 pools, six were positive for leishmania sp., and thus the infection rate in the municipality was 3.9%. through pcr/rflp, the digestion pattern among the positive samples was found to be similar to that of the reference strain of leishmania chagasi (mhom/br/74/pp75). conclusions: the detection of natural infection associated with studies on the epidemiology of visceral leishmaniasis suggests that l. longipalpis is involved in transmission of l. infantum chagasi in janaúba, particularly in areas of intense transmission of visceral leishmaniasis.
Phlebotomine sandflies (Diptera: Psychodidae) in Governador Valadares, a transmission area for American tegumentary leishmaniasis in State of Minas Gerais, Brazil
Barata, Ricardo Andrade;Paz, Gustavo Fontes;Bastos, Marcela Cardoso;Andrade, Roberta Christiane Oliveira;Barros, Daniela Campos Mendes de;Silva, Fabiana Oliveira Lara e;Michalsky, érika Monteiro;Pinheiro, Aimara da Costa;Dias, Edelberto Santos;
Revista da Sociedade Brasileira de Medicina Tropical , 2011, DOI: 10.1590/S0037-86822011005000003
Abstract: introduction: a study on the phlebotomine sandfly fauna was carried out in an endemic area for american tegumentary leishmaniasis in the municipality of governador valadares, in the state of minas gerais, brazil. methods: captures were undertaken using hp light traps in four districts, on three nights per month, for one year (from january to december 2008). correlations between climatic factors (temperature, relative air humidity and rainfall) and the numbers of sandflies collected was observed. results: 5,413 phlebotomine specimens were caught and were identified as belonging to 12 species. of these specimens, 2,851 (52%) were females and 2,562 (48%) were males. conclusions: lutzomyia intermedia predominated (29.9% of the species caught), thus suggesting that they were responsible for transmission of american tegumentary leishmaniasis, together with l. whitmani, which was also found in the area (4.3%). the presence of l. longipalpis (11.9%), the main vector for visceral leishmaniasis in brazil, is an important finding, which makes rigorous entomological surveillance of the area necessary.
Leishmaniose visceral: estudo de flebotomíneos e infec??o canina em Montes Claros, Minas Gerais
Monteiro, érika Michalsky;Silva, Jo?o Carlos Fran?a da;Costa, Roberto Teodoro da;Costa, Daniela Camargos;Barata, Ricardo Andrade;Paula, Edvá Vieira de;Machado-Coelho, George Luis Lins;Rocha, Marília Fonseca;Fortes-Dias, Consuelo Latorre;Dias, Edelberto Santos;
Revista da Sociedade Brasileira de Medicina Tropical , 2005, DOI: 10.1590/S0037-86822005000200004
Abstract: visceral leishmaniasis in brazil was initially associated with rural areas. however, due to several environmental modifications such as deforestation, urbanization and intense migratory processes, there has been an expansion of endemic areas, leading to urbanization of the disease, mainly in the central and northeastern regions of brazil. in the municipality of montes claros, located in the north of the state of minas gerais, an epidemiological survey on vl was carried out. a canine serological inquiry was carried out in 2002 and an entomological survey, using luminous cdc traps, was performed from september 2002 to august 2003. canine vl prevalence showed an average infection rate of approximately 5%. an estimated 16 species comprised the phlebotomine sand fly fauna, based on a total of 1043 specimens. the predominant species was lutzomyia longipalpis with a rate of 74%, suggesting its participation in the transmission of vl in the municipality of montes claros.
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