| experimental transmission of plasmodium mexicanum by bites of infected lutzomyia vexator (diptera: psychodidae). | lutzomyia vexator is an efficient experimental vector of plasmodium mexicanum, infecting 69.2% (9/13) of the sceloporus undulatus lizards with as few as one bite. sporozoites were present in the salivary glands by day 6.5 postfeed and infective by day 8 postfeed at 27 degrees c. the prepatent period was relatively long, ranging from 23 to 40 days for bite-induced infections and appears to be related to the number of sporozoites injected. the acute phase of the infection is initially exponential ... | 1987 | 3504905 |
| transmission success of the malaria parasite plasmodium mexicanum into its vector: role of gametocyte density and sex ratio. | the life-cycle of plasmodium depends on transmission of the parasite from the vertebrate host into its vector when the insect takes a bloodmeal. transmission success may depend in part on the parasite's gametocyte density and sex ratio in the blood. p. mexicanum, a parasite of fence lizards in california, usa, exploits the sandfly lutzomyia vexator as its vector. in experimental transmissions using naturally infected lizards as donors of blood, transmission success (measured as percentage of vec ... | 2000 | 11155927 |
| clonal diversity of a malaria parasite, plasmodium mexicanum, and its transmission success from its vertebrate-to-insect host. | infections of the lizard malaria parasite plasmodium mexicanum are often genetically complex within their fence lizard host (sceloporus occidentalis) harbouring two or more clones of parasite. the role of clonal diversity in transmission success was studied for p. mexicanum by feeding its sandfly vectors (lutzomyia vexator and lutzomyia stewarti) on experimentally infected lizards. experimental infections consisted of one, two, three or more clones, assessed using three microsatellite markers. a ... | 2009 | 19523471 |
| virulence of a malaria parasite, plasmodium mexicanum, for its sand fly vectors, lutzomyia vexator and lutzomyia stewarti (diptera: psychodidae). | evolutionary theory predicts that virulence of parasites for mobile vector insects will be low for natural parasite-host associations that have coevolved. i determined virulence of the malaria parasite of lizards, plasmodium mexicanum, for its vectors, two species of sand fly (diptera: psychodidae), lutzomyia vexator (coquillett 1907) and lutzomyia stewarti (mangabeira fo & galindo 1944), by measuring several life history traits. developmental rate from egg to eclosion differed for the two speci ... | 2011 | 22238877 |
| 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 ... | 2013 | 24069478 |
| genetic differentiation over a small spatial scale of the sand fly lutzomyia vexator (diptera: psychodidae). | the geographic scale and degree of genetic differentiation for arthropod vectors that transmit parasites play an important role in the distribution, prevalence and coevolution of pathogens of human and wildlife significance. we determined the genetic diversity and population structure of the sand fly lutzomyia vexator over spatial scales from 0.56 to 3.79 km at a study region in northern california. the study was provoked by observations of differentiation at fine spatial scales of a lizard mala ... | 2016 | 27756347 |
| discrimination of the plasmodium mexicanum vectors lutzomyia stewarti and lutzomyia vexator by a pcr-rflp assay and wolbachia infection. | | 0 | 24820578 |
| investigation of habitat effects on the spatial distribution of lutzomyia shannoni across heterogeneous environments, with note of respective mosquito species compositions. | sand flies are small blood feeding dipterans that are primary vectors of numerous human and livestock pathogens. control efforts are often complex and multidimensional. a fundamental step in the development and implementation of any integrated pest management (ipm) program is the refining of effective surveillance and identification techniques. before this study, the presence of two species, lutzomyia shannoni (dyar) and lutzomyia vexator (coquillett) became known in kentucky and surrounding sta ... | 2011 | 22238868 |
| sand fly (lutzomyia vexator) (diptera: psychodidae) populations in upstate new york: abundance, microhabitat, and phenology. | visceral leishmaniasis is an endemic protozoal disease of humans and dogs in tropical and subtropical regions in asia, africa, southern europe, central america, and south america, where sand flies (genera phlebotomus and lutzomyia) act as vectors. an outbreak in a new york foxhound kennel and subsequent surveillance revealed widespread leishmania infantum infection of dogs in the united states, outside the known range of the vector sand flies. for this study, we conducted surveillance for sand f ... | 2004 | 15311474 |
| new records of lutzomyia shannoni and lutzomyia vexator (diptera: psychodidae) in eastern tennessee. | | 2008 | 19263861 |
| new state records for lutzomyia shannoni and lutzomyia vexator. | two species of phlebotomine sand flies, lutzomyia shannoni (dyar) and lutzomyia vexator (coquillett), are reported for the first time from kentucky and ohio. l. vexator also is reported for the first time from tennessee. these insects were found in a northeasterly band extending from southwestern kentucky to southwestern ohio. both species were consistently captured from mid-july through september in 2006 and 2007 by using co2-baited center for disease control light traps. weekly sampling reveal ... | 2009 | 19645303 |
| lutzomyia spp. (diptera: psychodidae) response to olfactory attractant- and light emitting diode-modified mosquito magnet x (mm-x) traps. | mosquito magnet-x traps were modified for use with blue, green, red, and blue-green-red light-emitting diodes and olfactory attractants to determine the response of lutzomyia shannoni (dyar) and lutzomyia vexator (coquillett) (diptera: psychodidae) field populations to these attractants. red and blue-green-red-baited traps captured the highest numbers of lu. shannoni and lu. vexator, respectively, although, there were no significant differences between the colors. baiting the traps with co, attr ... | 2009 | 19769036 |
| the seasonal abundance of phlebotomine sand flies, lutzomyia species in florida. | the seasonality of phlebotomine sand flies was studied in florida, utilizing colored light-emitting diode- and attractant-baited mosquito magnet mm-x traps from september 2006 to september 2008 at san felasco hammock preserve state park, gainesville, fl. a total of 6,278 sand flies were collected from 314 actual nights and 1,692 total trap-nights, yielding 3.7 sand flies per trap-night. lutzomyia shannoni was the predominant species, constituting 55% to 80% of the total sand fly populations coll ... | 2010 | 20402345 |
| first report of phlebotomine sand flies (diptera: psychodidae) in kansas and missouri, and a pcr method to distinguish lutzomyia shannoni from lutzomyia vexator. | sand flies lutzomyia (psathyromyia) shannoni (dyar) and lu. (helcocyrtomyia) vexator (coquillet) were collected for the first time in southwest missouri and southeast kansas, expanding the known range of these species in north america. altogether, 680 sand flies (356 males and 324 females) were collected during trapping from may through october 2011 and identified using morphological characters. of the total sand flies collected, 315 were identified as lu. shannoni, with 181 individuals (or 26.6 ... | 0 | 23270176 |