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Search Results: 1 - 10 of 29348 matches for " Elizabeth Ferreira Rangel "
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Proven and putative vectors of American cutaneous leishmaniasis in Brazil: aspects of their biology and vectorial competence
Rangel, Elizabeth Ferreira;Lainson, Ralph;
Memórias do Instituto Oswaldo Cruz , 2009, DOI: 10.1590/S0074-02762009000700001
Abstract: the aim of the present review is to give relevant information on aspects of the biology and ecology, including the vectorial competence of lutzomyia sand fly species suggested as vectors of american cutaneous leishmaniasis in brazil. the disease, due to leishmania (viannia) braziliensis, has been registered in most municipalities in all the brazilian states and its transmission is associated with more than one sand fly species in each geographical region. a variety of leishmania species can be found in the amazon basin, where different epidemiological chains have been detected with the participation of different phlebotomine vectors. finally, a discussion is presented on some sand fly species found naturally infected by leishmania, but for which there is as yet no evidence regarding their epidemiological importance.
Ciclo biológico de Rhodnius Pallescens Barber, 1932 (Hemiptera, Reduviidae, Triatominae) em laboratório
Jurberg, José;Rangel, Elizabeth Ferreira;
Memórias do Instituto Oswaldo Cruz , 1984, DOI: 10.1590/S0074-02761984000300003
Abstract: we studied the life-cycle of r. pallescens under several conditions about temperature, humidity, lightness and source of food. humidity (never lowerthan 60%) and feeding diet have influence the lifecycle of this species, which was more rapid when white mice were used as source of food. the survival was higher when the bugs were kept in groups instead of individual tubes. dim light and a temperature of 27°c were conditions for good growth of this species.
Cutaneous leishmaniasis in frequent in equines from an endemic area in Rio de Janeiro, Brazil
Aguilar, Cruz Manuel;Rangel, Elizabeth Ferreira;Deane, Leonidas M.;
Memórias do Instituto Oswaldo Cruz , 1986, DOI: 10.1590/S0074-02761986000400015
Abstract: in an endemic area of cutaneous leishmaniasis in rio de janeiro state where a mule had been found infected, a systematic search among equines was performed, resulting in the detection of leishmania parasites in skin lesions of 30.8% of the animals, which included horses and mules. the eventual role of equines in the epidemiology of the human disease is being investigated.
Studies on the Feeding Habits of Lutzomyia (Lutzomyia) longipalpis (Lutz & Neiva, 1912) (Diptera: Psychodidae: Phlebotominae) Populations from Endemic Areas of American Visceral Leishmaniasis in Northeastern Brazil
Margarete Martins dos Santos Afonso,Rosemere Duarte,José Carlos Miranda,Lindenbergh Caranha,Elizabeth Ferreira Rangel
Journal of Tropical Medicine , 2012, DOI: 10.1155/2012/858657
Abstract: The aim of this study was to identify potential blood feeding sources of L. (L.) longipalpis specimens from populations in Northeastern Brazil, endemic areas of American Visceral Leishmaniasis (AVL) and its correlation with the transmission of L. (L.) i. chagasi. The ELISA technique was applied using bird, dog, goat, opossum, equine, feline, human, sheep, and rodent antisera to analyze 609 females, resulting in an overall positivity of 60%. In all municipalities, females showed higher positivity for bird followed by dog antiserum and sand fly specimens were also positive for equine, feline, human, sheep, goat, opossum, and rodent antisera. The finding for 17 combinations of two or three types of blood in some females corroborates the opportunistic habit of this sand fly species. The results demonstrating the association between L. (L.) longipalpis and opossum suggest the need for further evaluation of the real role of this synanthropic mammal in the eco-epidemiology of AVL. 1. Introduction American visceral leishmaniasis (AVL) is a serious public health problem in Brazil and presents a new epidemiological profile associated with domestic environments and, in this context, Lutzomyia (Lutzomyia) longipalpis is important considering its capacity to adapt to a wide range of impacted habitats, in addition to its sylvatic origin [1–3]. The enzyme immunoassay (ELISA) has been used to identify the feeding habits of L. (L.) longipalpis [4–6]. In light of this, studies related to feeding habits of sand fly vector L. (L.) longipalpis could contribute to a better understanding of eco-epidemiology of AVL, discussing its close association with Leishmania (Leishmania) infantum chagasi reservoirs. Currently, Northeastern Brazil accounts for about 47% of human cases for AVL exhibiting both epidemiological profiles, rural and urban, with highest incidences of the disease according to the Brazilian National Leishmaniases Program (NLP) [1]. The aim of this study was to identify potential blood meal sources for L. (L.) longipalpis from some Northeastern Brazil endemic municipalities. 2. Materials and Methods 2.1. Sand Fly Precedence Sand flies were collected from the municipalities of Jequié (State of Bahia, BA), Sobral and Massapê (State of Ceará, CE), and Teresina (State of Piauí, PI). These municipalities were selected based on their levels and profiles of AVL transmission according to NLP: Teresina, urban and intense transmission; Sobral, rural and intense transmission; Jequié, rural and moderate transmission, and Massapê, rural and sporadic transmission [1]. Sand flies
Development of Colombian isolates of Leishmania (Viannia) panamensis, Le. (V.) guyanensis and Le. (V.) braziliensis in the sandfly Lutzomyia intermedia (Lutz & Neiva, 1912) under experimental conditions
Rangel, Elizabeth Ferreira;Travi, Bruno L.;Barbosa, André F.;Montoya, James;
Memórias do Instituto Oswaldo Cruz , 1993, DOI: 10.1590/S0074-02761993000400003
Abstract: the development of colombian leishmania species of the subgenus viannia in lutzomyia intermedia was similar to that observed with brazilian le. (v.) braziliensis: colonization of the pylorus by paramastigotes; promastigotes in the midgut and massive infection of stomodeal valve. difference was observed in the number of paramastigotes colonizing the pylorus, which was smaller in colombian leishmania species than brazilian le. braziliensis.
Infec??o natural de Lutzomyia intermedia Lutz & Neiva, 1912, em área endêmica de leishmaniose tegumentar no Estado do Rio de Janeiro
Rangel, Elizabeth Ferreira;Souza, Nataly A. de;Wermelinger, Eduardo D.;Barbosa, André F.;
Memórias do Instituto Oswaldo Cruz , 1984, DOI: 10.1590/S0074-02761984000300020
Abstract: in a focus of cutaneous leishmaniasis in jacarepaguá, rio de janeiro, one specimen of lutzomyia intermedia was found naturaly infected with leishmania braziliensis.
Flebótomos de Vargem Grande, foco de leishmaniose tegumentar no Estado do Rio de Janeiro
Rangel, Elizabeth Ferreira;Souza, Nataly A.;Wermelinger, Eduardo D.;Azevedo, Alfredo Carlos R.;Barbosa, André F.;Andrade, Claudia A.;
Memórias do Instituto Oswaldo Cruz , 1986, DOI: 10.1590/S0074-02761986000300013
Abstract: in vargem grande, an endemic area of cutaneous leishmaniasis in state of rio de janeiro, where lutzomyia intermedia had been found infected with leishmania braziliensis, we performed a series of caputes of sandflies to increase the knowledge on their behaviour. the following species were found among 8,671 sandflies collected: l. intermedia, l. migonei, l. longipalpis, l. lanei, l. fischeri, l. firmatoi, l. monticola, l schreiberi, l. whitmani, l. pelloni, l. barrettpi e l. (pi) sp. inside houses and outdoors close to the houses, on human bait and in light traps, the predominant species was l. intermedia, followed by l. migonei, both being more numerous between 9 and 11 p.m. than from 6 to 8 p.m. in a plantation, l. migonei was predominant. in simultaneous captures on man and dog as baits, l. intermedia was more frequent on the former, l. migonei on the latter.
Flagellates in the Malpighian tubules of laboratory-bred Lutzomyia longipalpis fed on a hamster experimentally infected with Leishmania mexicana amazonensis
Rangel, Elizabeth Ferreira;Deane, Leonidas M.;Grimaldi Filho, Gabriel;Souza, Nataly A. de;Wermelinger, Eduardo D.;Barbosa, André F.;
Memórias do Instituto Oswaldo Cruz , 1985, DOI: 10.1590/S0074-02761985000300016
Abstract: as a preparatory stage for a study aiming at identifying the species and subspecies of local leishmania in naturally infected sandflies through immunoradiometric assay with monoclonal antibodies, we tried to obtain experimental infections of phlebotomines with well characterized stocks of parasites, in order to test the effectiveness of the method.
Studies on the feeding habits of Lutzomyia (N.) intermedia (Diptera, Psychodidae), vector of cutaneous leishmaniasis in Brazil
Afonso, Margarete Martins dos Santos;Gomes, Almério Castro;Meneses, Cláudio Roberto Valente;Rangel, Elizabeth Ferreira;
Cadernos de Saúde Pública , 2005, DOI: 10.1590/S0102-311X2005000600030
Abstract: the precipitin test was applied to identify the blood meal sources of lutzomyia intermedia, collected in two distinct habitats: inside houses and in the peridomicile, in mesquita, rio de janeiro state, brazil, a transmission area of leishmania (v.) braziliensis. the following antisera were tested: human, avian, equine, rodent, and opossum. from a total of 370 females analyzed, 128 specimens from the domicile and 59 from the peridomicile reacted with specific antisera. the anthropophily of l. intermedia was confirmed in both habitats; likewise, the feeding of this sand fly species on domestic animals, observed in previous entomological surveys, was confirmed by the strong reactivity with avian, canine, and equine antisera. however, feeding on rodents, mammals frequently found inside and around houses, represents further evidence related to the vector competence of l. intermedia, since synanthropic and sylvatic rodents have been considered a putative reservoir of l. (v.) braziliensis.
Integrated Tools for American Cutaneous Leishmaniasis Surveillance and Control: Intervention in an Endemic Area in Rio de Janeiro, RJ, Brazil
Cheryl Gouveia,Rosely Magalh?es de Oliveira,Adriana Zwetsch,Daniel Motta-Silva,Bruno Moreira Carvalho,Ant?nio Ferreira de Santana,Elizabeth Ferreira Rangel
Interdisciplinary Perspectives on Infectious Diseases , 2012, DOI: 10.1155/2012/568312
Abstract: American cutaneous leishmaniasis (ACL) is a focal disease whose surveillance and control require complex actions. The present study aimed to apply integrated tools related to entomological surveillance, environmental management, and health education practices in an ACL-endemic area in Rio de Janeiro city, RJ, Brazil. The distribution of the disease, the particular characteristics of the localities, and entomological data were used as additional information about ACL determinants. Environmental management actions were evaluated after health education practices. The frequency of ACL vectors Lutzomyia (N.) intermedia and L. migonei inside and outside houses varied according to environment characteristics, probably influenced by the way of life of the popular groups. In this kind of situation environmental management and community mobilization become essential, as they help both specialists and residents create strategies that can interfere in the dynamics of vector’s population and the contact between man and vectors. 1. Introduction American cutaneous leishmaniasis (ACL) is among the six most important infectious diseases and the 15 most neglected diseases of the world [1]. It presents a diversity of transmission cycles that involve different species of parasites, vectors, and hosts in restricted ecological niches [2]. Thus, the indication of control measures must consider the entomological and epidemiological characteristics of each locality. According to Sabroza et al. [3], for each disease and particular situation there are environmental and behavioral factors related to the production of endemic or epidemic processes. To explain these factors, Sabroza et al. [3, page 216] used the concept of conditions receptivity, defined as the “set of environmental, social and behavioral characteristics that allow the reproduction of the parasites and its maintenance in the communities.” The city of Rio de Janeiro presents many areas where these conditions are met, mainly because of human occupation of hillsides, which modifies the landscape and favors the installation of ACL transmission cycles. The number of cases in the city has been increasing since the 1980s, with the west zone presenting the highest indices, more specifically the region of Jacarepaguá [4]. Most of the cases in the study area (Campus FIOCRUZ da Mata Atlantica - CFMA, Rio de Janeiro) are related to the occupation of hillsides in Maci?o da Pedra Branca, an Atlantic Forest area. The present study aimed to discuss an experience on ACL surveillance based on integrated tools related to entomological
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