zoonotic cutaneous leishmaniasis due to leishmania (viannia) braziliensis associated with domestic animals in venezuela and brazil.after outbreaks of cutaneous leishmaniasis in solano state, venezuela, 5% of the population had parasitized ulcers while after similar outbreaks in mesquita, rio de janeiro state, brazil, 9% had the disease. in these foci children, including some under six years of age, were affected. there was no significant difference in the occurrence of the disease according to sex or type of employment. in solano, 3% of dogs and 28% of donkeys had parasitized lesions, while in mesquita these indices were 19 ...19892319948
study of an outbreak of cutaneous leishmaniasis in venezuela. the role of domestic animals.during an outbreak of cutaneous leishmaniasis in a locality (las rosas, cojedes state, venezuela) previously non-endemic, 12.9% of humans, 7% of dogs and 21.4% of donkeys (equus asinus) had lesions with parasites. the agent in the three hosts was identified as leishmania braziliensis, subspecies braziliensis at least in man and donkey. the probable vector was lutzomyia panamensis. no infection was found in a small sample of wild mammals examined. the outbreak was apparently linked with the impor ...19846535915
seasonal and nocturnal domiciliary human landing/biting behaviour of lutzomyia (lutzomyia) evansi and lutzomyia (psychodopygus) panamensis (diptera; psychodidae) in a periurban area of a city on the caribbean coast of eastern venezuela (barcelona; anzoátegui state).in recent years, in addition to american cutaneous leishmaniasis (acl), a significant number of cases of american visceral leishmaniasis (avl) have been reported in periurban areas of barcelona city (anzoátegui state, venezuela). we studied the bionomics of lutzomyia (lutzomyia) evansi and lutzomyia (psychodopygus) panamensis, possible vectors of avl and acl, respectively, in el rincón, a periurban village of that city. to evaluate the seasonal domiciliary landing/biting activity of sandflies on ...199910674076
[analysis of the primary and secondary structure of the mitochondrial serine transfer rna in seven species of lutzomyia].lutzomyia sand flies are involved in the transmission of the parasite leishmania spp. in america. the taxonomy of these vectors is traditionally based on morphological features of the adult stage, particularly the paired structures of the head and genitalia. although these characters are useful to distinguish most species of lutzomyia, morphological identification may be complicated by the similarities within subgenera and species group.200718320108
seasonality of lutzomyia fairtigi (diptera: psychodidae: phlebotominae), a species endemic to eastern colombia.the bionomics of sand flies (diptera: phlebotominae) was studied monthly for two consecutive years in alluvial gallery forests in the department of casanare, northeastern colombia. a total of 2,365 specimens and 10 species were captured using cdc light traps and shannon traps, and from diurnal resting places, and human landing collections. lutzomyia fairtigi martins (55%), lutzomyia micropyga (mangabeira) (20.9%), and lutzomyia antunesi (coutinho) (13.5%) were the predominant species in the regi ...200818797762
lutzomyia sand fly diversity and rates of infection by wolbachia and an exotic leishmania species on barro colorado island, panama.sand flies (diptera, psychodidae, phlebotominae) in the genus lutzomyia are the predominant vectors of the protozoan disease leishmaniasis in the new world. within the watershed of the panama canal, the cutaneous form of leishmaniasis is a continuous health threat for residents, tourists and members of an international research community. here we report the results of screening a tropical forest assemblage of sand fly species for infection by both leishmania and a microbe that can potentially se ...201020231892
incrimination of four sandfly species previously unrecognized as vectors of leishmania parasites in mexico.cutaneous leishmaniasis (cl) is endemic to the yucatan peninsula of mexico. the main causative agent is the parasite leishmania mexicana (biagi) (kinetoplastida: trypanosomatidae) and, based on the classic work of dr biagi's research team, it has been generally accepted and frequently reported that the only vector of l. mexicana in the region is the sandfly lutzomyia olmeca olmeca (vargas & diáz-nájera) (diptera: psychodidae). evidence gathered from recent entomological studies conducted mainly ...201020604861
characterization of the candiru antigenic complex (bunyaviridae: phlebovirus), a highly diverse and reassorting group of viruses affecting humans in tropical america.the genus phlebovirus of the family bunyaviridae consists of approximately 70 named viruses, currently assigned to nine serocomplexes (species) based on antigenic similarities. sixteen other named viruses that show little serologic relationship to the nine recognized groups are also classified as tentative species in the genus. in an effort to develop a more precise classification system for phleboviruses, we are attempting to sequence most of the named viruses in the genus with the goal of clar ...201121289119
anthropogenic influence on the distribution, abundance and diversity of sandfly species (diptera: phlebotominae: psychodidae), vectors of cutaneous leishmaniasis in panama, species of the genus lutzomyia are vectors of american cutaneous leishmaniasis (acl). there is no recent ecological information that may be used to develop tools for the control of this disease. thus, the goal of this study was to determine the composition, distribution and diversity of lutzomyia species that serve as vectors of acl. sandfly sampling was conducted in forests, fragmented forests and rural environments, in locations with records of acl. lutzomyia gomezi, lutzomyia panam ...201122241128
ecuador paraiso escondido virus, a new flavivirus isolated from new world sand flies in ecuador, is the first representative of a novel clade in the genus flavivirus.a new flavivirus, ecuador paraiso escondido virus (epev), named after the village where it was discovered, was isolated from sand flies (psathyromyia abonnenci, formerly lutzomyia abonnenci) that are unique to the new world. this represents the first sand fly-borne flavivirus identified in the new world. epev exhibited a typical flavivirus genome organization. nevertheless, the maximum pairwise amino acid sequence identity with currently recognized flaviviruses was 52.8%. phylogenetic analysis o ...201526355096
dna barcoding for the identification of sand fly species (diptera, psychodidae, phlebotominae) in colombia.sand flies include a group of insects that are of medical importance and that vary in geographic distribution, ecology, and pathogen transmission. approximately 163 species of sand flies have been reported in colombia. surveillance of the presence of sand fly species and the actualization of species distribution are important for predicting risks for and monitoring the expansion of diseases which sand flies can transmit. currently, the identification of phlebotomine sand flies is based on morpho ...201424454877
proceedings of the ix international symposium on phlebotomine sandflies (isops ix), reims, france, june 28th-july 1st, 2016. 201627677701
current and future niche of north and central american sand flies (diptera: psychodidae) in climate change scenarios.ecological niche models are useful tools to infer potential spatial and temporal distributions in vector species and to measure epidemiological risk for infectious diseases such as the leishmaniases. the ecological niche of 28 north and central american sand fly species, including those with epidemiological relevance, can be used to analyze the vector's ecology and its association with transmission risk, and plan integrated regional vector surveillance and control programs. in this study, we mod ...201324069478
identification of phlebotomine sand flies using one maldi-tof ms reference database and two mass spectrometer systems.rapid, accurate and high-throughput identification of vector arthropods is of paramount importance in surveillance programmes that are becoming more common due to the changing geographic occurrence and extent of many arthropod-borne diseases. protein profiling by maldi-tof mass spectrometry fulfils these requirements for identification, and reference databases have recently been established for several vector taxa, mostly with specimens from laboratory colonies.201525957576
first report of warileya rotundipennis (psychodidae: phlebotominae) naturally infected with leishmania (viannia) in a focus of cutaneous leishmaniasis in colombia.the expansion of transmission of cutaneous leishmaniasis from sylvatic ecosystems into peri-urban and domestic settings has occurred as sand flies have adapted to anthropogenic environmental modifications. assessment of the intradomiciliary presence of sand flies in households of the settlement "la cabaña", in the department of risaralda, colombia, revealed an abundance of warileya rotundipennis. this unexpected observation motivated further analyses to evaluate the participation of this species ...201525917717
taxonomy, diversity, temporal and geographical distribution of cutaneous leishmaniasis in colombia: a retrospective study.leishmaniases are tropical zoonotic diseases, caused by kinetoplastid parasites from the genus leishmania. new world (nw) species are related to sylvatic cycles although urbanization processes have been reported in some south american countries such as colombia. currently, few studies show the relative distribution of leishmania species related to cutaneous leishmaniasis (cl) in south america due to the lack of accurate surveillance and public health systems. herein, we conducted a systematic es ...201627328969
natural leishmania (viannia) spp. infections in phlebotomine sand flies (diptera: psychodidae) from the brazilian amazon region reveal new putative transmission cycles of american cutaneous amazonian brazil the etiological agents of american cutaneous leishmaniasis (acl) belong to at least seven leishmania species but little is known about the putative phlebotomine sand fly vectors in different biomes. in 2002-2003 a survey of the phlebotomine fauna was undertaken in the "floresta nacional do tapajós", belterra municipality, in the lower amazon region, western pará state, brazil, where we recently confirmed the presence of a putative hybrid parasite, l. (v.) guyanensis × l. (v.) ...201627235194
dna barcoding of neotropical sand flies (diptera, psychodidae, phlebotominae): species identification and discovery within brazil.dna barcoding has been an effective tool for species identification in several animal groups. here, we used dna barcoding to discriminate between 47 morphologically distinct species of brazilian sand flies. dna barcodes correctly identified approximately 90% of the sampled taxa (42 morphologically distinct species) using clustering based on neighbor-joining distance, of which four species showed comparatively higher maximum values of divergence (range 4.23-19.04%), indicating cryptic diversity. ...201526506007
spatial distribution of sand fly vectors and eco-epidemiology of cutaneous leishmaniasis transmission in colombia.leishmania is transmitted by phlebotominae insects that maintain the enzootic cycle by circulating between sylvatic and domestic mammals; humans enter the cycles as accidental hosts due to the vector's search for blood source. in colombia, leishmaniasis is an endemic disease and 95% of all cases are cutaneous (cl), these cases have been reported in several regions of the country where the intervention of sylvatic areas by the introduction of agriculture seem to have an impact on the rearrangemen ...201526431546
cutaneous leishmaniasis and sand fly fluctuations are associated with el niño in panamá.cutaneous leishmaniasis (cl) is a neglected tropical vector-borne disease. sand fly vectors (sf) and leishmania spp parasites are sensitive to changes in weather conditions, rendering disease transmission susceptible to changes in local and global scale climatic patterns. nevertheless, it is unclear how sf abundance is impacted by el niño southern oscillation (enso) and how these changes might relate to changes in cl transmission.201425275503
exposure to phlebotomus argentipes (diptera, psychodidae, phlebotominae) sand flies in rural areas of bihar, india: the role of housing conditions.visceral leishmaniasis (vl) is a vector-borne infectious disease, caused by the protozoan leishmania donovani, which is transmitted by phlebotomine sand flies. in an earlier study in bihar, india, we found an association between incidence of vl and housing conditions. in the current study we investigated the influence of housing structure and conditions in and around the house on the indoor abundance of phlebotomus argentipes, the vector of vl in this area.201425184542
seasonal variation and natural infection of lutzomyia antunesi (diptera: psychodidae: phlebotominae), an endemic species in the orinoquia region of colombia.lutzomyia antunesi has been commonly reported in outbreaks of cutaneous leishmaniasis (cl) in the orinoquia region of colombia. the bionomics of this species were studied in the municipality of villavicencio (meta, colombia). sandflies were captured over the course of one week per month for one year in intradomiciliary, peridomiciliary and extradomiciliary housing areas. the captures were performed from 06:00 pm-06:00 am using cdc light traps and the females were processed for polymerase chain r ...023828011
clinical cutaneous leishmaniasis rates are associated with household lutzomyia gomezi, lu. panamensis, and lu. trapidoi abundance in trinidad de las minas, western panama.american cutaneous leishmaniasis (acl) transmission patterns have been increasingly associated with domestic and peridomestic environments. here, we present results from an epidemiological survey of 94 people from 24 households in trinidad de las minas, western panama. we studied the role of sand fly abundance, housing quality, peridomicile landscape matrix, and vegetation structure on shaping household clinical acl rate patterns at trinidad de las minas. we found that sand fly abundance was sig ...201323339202
a study of a population of nyssomyia trapidoi (diptera: psychodidae) caught on the pacific coast of ecuador.cutaneous leishmaniasis is endemic to the pacific coast of ecuador, and nyssomyia trapidoi is considered to be its main vector. dujardin et al. [1] recorded some differences in body pigmentation and isoenzymatic profiles in sympatric populations of ny. trapidoi from the pacific coast of ecuador and suggested the existence of two cryptic species.201222824472
assessing the importance of four sandfly species (diptera: psychodidae) as vectors of leishmania mexicana in campeche, mexico.localized cutaneous leishmaniasis represents a public health problem in many areas of mexico, especially in the yucatan peninsula. an understanding of vector ecology and bionomics is of great importance in evaluations of the transmission dynamics of leishmania parasites. a field study was conducted in the county of calakmul, state of campeche, during the period from november 2006 to march 2007. phlebotomine sandfly vectors were sampled using centers for disease control light traps, baited disney ...201627040367
insecticide barrier spraying for the control of sand fly vectors of cutaneous leishmaniasis in rural initial evaluation of insecticide barrier spraying directed against sand fly vectors of cutaneous leishmaniasis was done in a nonclimax forested area with heavy undergrowth in peten, guatemala. a 100 m-wide swath of vegetation was sprayed once with a 1:3 mixture of cyfluthrin insecticide and a palm oil carrier using back-pack sprayers to simulate a central cantonment area in one site while another site remained as an untreated control. prior to spraying and throughout 87 days post-treatment, ...19957611551
evidence for anthropophily in five species of phlebotomine sand flies (diptera: psychodidae) from northern colombia, revealed by molecular identification of bloodmeals.identification of the bloodmeal sources of phlebotomine sand flies is fundamental to determining which species are anthropophilic and understanding the transmission of leishmania parasites in natural epidemiological settings. the objective of this study was to identify sand fly bloodmeals in the mixed leishmaniasis focus of the department of sucre, northern colombia. in all 141 engorged female sand flies were analyzed, after being captured in intradomiciliary, peridomiciliary and extradomiciliar ...201626464046
molecular identification of leishmania spp. in sand flies (diptera: psychodidae, phlebotominae) from ecuador.the detection and identification of natural infections in sand flies by leishmania protozoan species in endemic areas is a key factor in assessing the risk of leishmaniasis and in designing prevention and control measures for this infectious disease. in this study, we analyzed the leishmania dna using nuclear ribosomal internal transcript spacer (its) sequences. parasite dna was extracted from naturally infected, blood-fed sand flies collected in nine localities considered leishmaniasis-endemic ...201728981860
nestedness patterns of sand fly (diptera: psychodidae) species in a neotropical semi-arid environment.a common pattern in neotropical leishmania spp. transmission is the co-occurrence of several sand fly (sf) species at endemic foci. we collected 13 sf spp. by direct aspiration in natural resting places (nrp) and 10 sf spp. with shannon traps (st), totaling 15 spp. with both methods, at 6 locations within a semi-arid region with endemic visceral leishmaniasis transmission in falcón state, northwestern venezuela. we used null model testing of species co-occurrence and nestedness metrics estimated ...201626456179
[an updated checklist of phlebotomine sand flies (diptera: psychodidae: phlebotominae) from the colombian andean coffee-growing region].an updated list of phlebotomine sand flies species in coffee growing areas in the colombian andean region is presented. fifty three species were reported from 12 departments. in addition, species distribution in the region was derived from specimens obtained during intensive field work in five departments, from previously published studies and from the taxonomic revision of specimens in the entomological collection of the programa de estudio y control de enfermedades tropicales (pecet). the list ...201425504134
Displaying items 1 - 30 of 30