| seasonality, biting cycle and parity of the yellow fever vector mosquito haemagogus janthinomys in trinidad. | 1. age composition, seasonal abundance and diel patterns of landing activity of the sylvan vector of yellow fever haemagogus janthinomys dyar were monitored weekly during 1981-82 by human collectors on the ground at point gourde in chaguaramas forest, 16 km west of port of spain, trinidad. 2. landing collections of hg. janthinomys showed only diurnal activity, from 06.00 to 18.00 (sunrise to sunset, universal time), with a single peak of activity between 10.00 and 16.00 hours. 3. densities of hg ... | 1992 | 1358266 |
| [estimation of the survival rate, the relative density and the infection rate of a population of haemagogus janthinomys dyar (diptera, culicidae) from which strains of yellow fever were isolated in brazilian amazon]. | the conditions of maintenance of yf virus in brazilian amazonia are not yet elucidated. generally, the presence of the virus is attested by human cases of sylvatic origin. during a survey done at the exact place where a man have probably been contaminated, it was possible for the first time in south america, to estimate the mean parity rate of a population of the potential vector haemagogus janthinomys, from which the yf virus was actually isolated. the survival rate (ts = 0.96), the biting rate ... | 1991 | 1687266 |
| sylvatic yellow fever activity in trinidad, 1988-1989. | of a total of 18,068 mosquitoes (361 pools) collected in south-eastern trinidad forests from december 1988 to may 1989, 47 species belonging to 14 genera were identified. five yellow fever virus isolates were made from haemagogus janthinomys and one from sabethes chloropterus. all the other pools of mosquitoes examined were negative for the virus. the mosquito isolates were made in december and january. in addition, in late february and early march, 2 infected howler monkeys (alouatta sp.) were ... | 1990 | 1971734 |
| an outbreak of mayaro virus disease in belterra, brazil. iii. entomological and ecological studies. | results in entomological and vertebrate host investigations made during dual outbreaks of mayaro (may) and yellow fever (yf) viruses in belterra, pará, brazil in 1978 are reported. over 9,000 insects representing 26 species were assayed in 396 pools for the presence of arboviruses. pools of haemagogus janthinomys dyar yielded the only isolates of either may or yf virus. the minimum field infection rate for nine isolates of may virus from hg. janthinomys was 1:82, and for two isolates of yf virus ... | 1981 | 6266265 |
| [epidemiology of arbovirus diseases: use and value of physiologic age determination of female mosquito vectors]. | the physiological age of yellow fever aedes females in africa was studied during four years, from 1988 to 1992. we used a method, according to polovodova's method, which looks for the "yellow body" under natural light. those yellow bodies exist in the old females, the "parous" ones, and not in the young females, the "nulliparous" ones. we present some results to illustrate the interest of studying the physiological age of mosquitoes in the epidemiology of the arboviral diseases. the transmission ... | 1996 | 8924776 |
| an epidemic of sylvatic yellow fever in the southeast region of maranhao state, brazil, 1993-1994: epidemiologic and entomologic findings. | yellow fever virus transmission was very active in maranhao state in brazil in 1993 and 1994. an investigation was carried out to evaluate the magnitude of the epidemic. in 1993, a total of 932 people was examined for yellow fever from maranhao: 70 were positive serologically, histopathologically, and/or by virus isolation, and another four cases were diagnosed clinically and epidemiologically. in mirador (17,565 inhabitants), the incidence was 3.5 per 1,000 people (case fatality rate [number of ... | 1997 | 9288803 |
| yellow fever in pará state, amazon region of brazil, 1998-1999: entomologic and epidemiologic findings. | yellow fever (yf) is frequently associated with high severity and death rates in the amazon region of brazil. during the rainy seasons of 1998 and 1999, 23 (eight deaths) and 34 (eight deaths) human cases of yf were reported, respectively, in different geographic areas of pará state; most cases were on marajó island. patients were 1 to 46 years of age. epidemiologic and ecological studies were conducted in afuá and breves on marajó island; captured insects yielded isolates of 4 and 11 yf strains ... | 2001 | 11485676 |
| epidemic of jungle yellow fever in brazil, 2000: implications of climatic alterations in disease spread. | seventy-seven human cases of sylvatic yellow fever were reported in brazil during the period january-june 2000. the first cases were reported 1 week after new year's day and originated at chapada dos veadeiros, a tourist canyon site in goiás state, near brasília, the brazilian capital. the laboratory procedures used for diagnoses included serology with an igm capture assay and plaque reduction neutralization test, virus isolation in suckling mice and c6/36 cells, and immunohistochemistry. all ca ... | 2001 | 11596099 |
| isolation of yellow fever virus from nulliparous haemagogus (haemagogus) janthinomys in eastern amazonia. | in 1998, an epizootic of yellow fever (yf) killed many howler monkeys (alouatta spp.) in eastern amazonia near the city of altamira. an infection level with yf virus of approximately 3.6% was determined from analysis of 456 females of haemagogus janthinomys dyar, the main enzootic yf vector in south america. one month later, a second study of 164 females captured in the same place led to infection levels of 0.8% for parous and 2.9% for nulliparous females. these results lead to the conclusion th ... | 2002 | 12656130 |
| isolations of yellow fever virus from haemagogus leucocelaenus in rio grande do sul state, brazil. | following howling monkey (alouatta caraya) deaths and yellow fever (yf) antigen detection by immunohistochemistry in the liver sample of a dead monkey in april and may 2001 in the municipalities of garruchos and santo antônio das missões, rio grande do sul state, brazil, epidemiological field investigations were initiated. two strains of yf virus were isolated in suckling mice from 23 haemagogus (conopostegus) leucocelaenus dyar & shannon mosquitoes collected from the study sites. the yf virus w ... | 2003 | 12892055 |
| [culicidae insect fauna from rural zone in amazonas state with incidence of sylvatic yellow fever]. | after the occurrence of 14 sylvatic yellow fever cases in 10 cities in the state of amazonas during 1996, an investigation into the presence of sylvatic yellow fever vectors was carried out. the material of larvae and adult insects was collected around residences and canopy trees within forests, using a light trap (cdc) and human bait. a total of 424 insects was collected. thirty seven species were identified, some of which were sylvatic yellow fever vectors: haemagogus janthinomys, ha. leucocel ... | 2003 | 12908034 |
| feeding patterns of haemagogus janthinomys (diptera: culicidae) in different regions of brazil. | new data on the feeding patterns of haemagogus (haemagogus) janthinomys dyar from different geographical regions of brazil, by using the precipitin test as the bloodmeal-identifying tool, are presented. the following antisera were used: bird, dog, human, rodent, cattle, horse, and opossum. the origins of 287 bloodmeals were identified, whereas 33 specimens were negative to the antiserums tested. among the reactive specimens, 174 (60.6%) fed on only one food source, of which 35.1% originated from ... | 2005 | 16465738 |
| [presence of haemagogus equinus theobald, 1903 (diptera: culicidae), in soledad and malambo, in the province of atlántico, colombia]. | yellow fever is a serious illness public health importance and is transmitted by mosquitoes of the genera haemagogus and sabethes in the rural and forest environments, and by aedes aegypti in the urban setting. in colombia, haemagogus janthinomys and h. equinus are considered efficient vectors of this viral disease. | 2008 | 18645665 |
| [record of epidemiologically important culicidae in the rural area of manaus, amazonas]. | the biodiversity of the amazon region includes many species of arthropod vectors in different ecotopes, thus enabling occurrences of diseases like malaria, filariasis and arbovirosis. from august 2001 to july 2002, we gathered culicids from inside homes, from areas surrounding these homes and from forested areas of the são joão community, in the rural zone of manaus, state of amazonas. 1240 specimens were collected, belonging to the culicinae (99%) and anophelinae (1%) subfamilies, with 50 speci ... | 2008 | 19142448 |
| multivariate discrimination between two cryptic haemagogus species associated with the transmission of yellow fever virus in the americas. | mosquitoes of the genus haemagogus are important vectors of yellow fever virus and other arboviruses and are the principal reservoirs of these viruses in nature. haemagogus capricornii and haemagogus janthinomys are closely related species between which females are morphologically cryptic. a morphometric study of these species was performed on male and female specimens from 14 municipalities in brazil. morphometric analyses were able to distinguish females. multivariate morphometrics may be a us ... | 2009 | 19432064 |
| biodiversity and influence of climatic factors on mosquitoes (diptera: culicidae) around the peixe angical hydroelectric scheme in the state of tocantins, brazil. | the influence of climatic factors on the seasonal frequency of mosquitoes (diptera: culicidae) at the peixe angical hydroelectric scheme (tocantins, brazil) was evaluated in the present paper. mosquito surveys were conducted in the municipality of peixe and in areas surrounding the reservoir in the municipalities of paranã and são salvador do tocantins during two daytime periods (10 am-12 noon and 2 pm-4 pm) and two night-time periods (6 pm-8 pm and 6 pm-10 am) over 14 months. in total, 10,840 s ... | 2010 | 20428674 |
| a list of mosquito species of the brazilian state of pernambuco, including the first report of haemagogus janthinomys (diptera: culicidae), yellow fever vector and 14 other species (diptera: culicidae). | besides mosquito species adapted to urban environments (culex quinquefasciatus, aedes aegypti and aedes albopictus), only 15 species of anopheles had been recorded in the state of pernambuco. | 2010 | 20802950 |
| observations on the seasonal incidence and diel oviposition periodicity of haemagogus mosquitoes (diptera: culicidae) in trinidad, w.i.: part i. haemagogus janthinomys dyar. | the diel oviposition periodicity of sylvan haemagogus janthinomys dyar in the pt. gourde forest, trinidad, west indies was monitored weekly for 53 weeks using conventional ovitraps. during the wet season (september to november 1981 and may to september 1982) a large well-defined unimodal peak occurred six to eight hours after sunrise (comprising 94% of eggs laid and 91% occurrences). during the dry season (december 1981 to may 1982), a small less-well-defined peak occurred two to four hours befo ... | 2008 | 2575884 |
| a comparative study of the effect of multiple immersions on aedini (diptera: culicidae) mosquito eggs with emphasis on sylvan vectors of yellow fever virus. | the effect of multiple immersions on haemagogus janthinomys , haemagogus leucocelaenus , aedes albopictus and ochlerotatus terrens eggs was studied. eggs were collected in april, june, october and december of 2011 in minas gerais, brazil. most of the aedes and ochlerotatus eggs hatched upon the first immersion, while haemagogus eggs showed a varied instalment hatching response. the number of immersions required for hatching increased for eggs collected closer to the dry winter season. | 2013 | 24626304 |
| feeding habits of mosquitoes (diptera: culicidae) in an area of sylvatic transmission of yellow fever in the state of são paulo, brazil. | the reintroduction of sylvatic yellow fever in the state of são paulo after about six decades was confirmed in the northwestern region in 2000, where in 2008 there also occurred an important epizootic. the purpose of this study was to investigate the feeding habits of culicids potentially involved in the sylvatic transmission of the virus in this region. | 2015 | 25810711 |
| characterization of mitochondrial genome of haemagogus janthinomys (diptera: culicidae). | haemagogus janthinomys is a mosquito of high importance in public health due its involvement on natural wild cycles of two important arboviruses in the brazilian amazon region: yellow fever virus (flaviviridae, flavivirus) and mayaro virus (togaviridae, alphavirus). here, we have sequenced and described all the mitochondrial genes for the hg. janthinomys species. the complete coding sequence is14 937 bp long and includes 37 functional genes, of which 13 codes for proteins, 22 for trna and 2 for ... | 2017 | 26709451 |
| diversity of yellow fever mosquito vectors in the atlantic forest of rio de janeiro, brazil. | environmental modifications caused by human activities have led to changes in mosquito vector populations, and sylvatic species have adapted to breeding in urban areas. | 2017 | 27384833 |
| flight height preference for oviposition of mosquito (diptera: culicidae) vectors of sylvatic yellow fever virus near the hydroelectric reservoir of simplício, minas gerais, brazil. | in this study, the oviposition behavior of mosquito species exhibiting acrodendrophilic habits was investigated. the study was conducted near the simplicio hydroelectic reservoir (shr) located on the border of the states of minas gerais and rio de janeiro, brazil. samples were collected using oviposition traps installed in forest vegetation cover between 1.70 and 4.30 m above ground level during the months of april, june, august, october, and december of 2011. haemagogus janthinomys (dyar), haem ... | 2013 | 23926776 |
| ecological aspects of mosquitoes (diptera: culicidae) in the gallery forest of brasília national park, brazil, with an emphasis on potential vectors of yellow fever. | we analyzed the vertical and monthly distributions of culicid species in the gallery forest of brasília national park, with an emphasis on the potential vectors of yellow fever (yf). | 2014 | 24142367 |
| observations on haemagogus janthinomys dyar (diptera: culicidae) and other mosquito populations within tree holes in a gallery forest in the northwestern region of sao paulo state, brazil. | in 2000, an outbreak of sylvatic yellow fever possibly occurred in gallery forests of the grande river in the paraná basin in the northwestern region of são paulo state. the aim of this study was to obtain information on the bionomics of haemagogus and other mosquitoes inside tree holes in that area. eighteen open tree holes were sampled for immature specimens. adults were collected twice a month in the forest in santa albertina county from july 2000 to june 2001. the seasonal frequency of fourt ... | 2010 | 20878007 |
| spatial and temporal abundance of three sylvatic yellow fever vectors in the influence area of the manso hydroelectric power plant, mato grosso, brazil. | human biting catches of sylvatic yellow fever (syf) vectors were conducted at eight stations in the influence area of the manso hydroelectric power plant (central brazil) in sampling campaigns every 2 mo from july 2000 to november 2001. in total, 206 individuals were captured and classified as one of three species important for the transmission of syf in mato grosso state: haemagogus (haemagogus) janthinomys (dyar, 1921); haemagogus (conopostegus) leucocelaenus (dyar & shannon, 1924); and sabeth ... | 2012 | 22308793 |
| release-recapture experiments with canopy mosquitoes in the genera haemagogus and sabethes (diptera: culicidae) in brazilian amazonia. | in 2 forested areas near belém (para state, brazil), 2 haemagogus and 6 sabethes species were marked released and recaptured in may 1989 and in april 1993. the recapture rates were high, 4.9 and 13.1% for haemagogus and sabethes spp., respectively. for haemagogus janthinomys dyar, females were recaptured until 27 d after release. the duration of the gonotrophic cycle was between 5.0 and 9.5 d and the survival rate was 0.90-0.92. haemagogus leucocelaenus (dyar & shannon) was recaptured once, 21 d ... | 1998 | 9835682 |
| [conditions for the laboratory survival of haemagogus janthinomys dyar, 1921 (diptera:culicidae)]. | a little modification was made on the classical borel tube, used for rearing isolated females of mosquitoes. the first studies were realized with the main yellow fever vector, haemagogus janthinomys, in brazil. the results are: a better survival, as far as 72 days, a greater number of eggs, up to 80, and a shorter trophogonic cycle of 7-8 days. so, one can imagine more easily further studies about the vertical transmission of the yf virus by this important neo-tropical mosquito. | 2016 | 9026827 |
| immunoinformatics and structural vaccinology driven prediction of multi-epitope vaccine against mayaro virus and validation through in-silico expression. | the mayaro virus (mayv) belongs to genus "alphavirus" and family "togaviridae". mayv has distribution in the amazonia, central and northeastern regions of brazil. the abundance of mosquito vector haemagogus janthinomys has major role in the outbreaks of arthralgia disease in brazil. vaccination or immunization is an alternative approach for the protection against this disease. to search the effective candidate for vaccine against mayaro virus, various immunoinformatics tools were used to predict ... | 2019 | 31173935 |
| detection of yellow fever virus in sylvatic mosquitoes during disease outbreaks of 2017⁻2018 in minas gerais state, brazil. | brazil has experienced several arbovirus outbreaks in recent years, among which yellow fever stands out. the state of minas gerais faced outbreaks of sylvatic yellow fever in 2017 and 2018, with 1002 confirmed cases and 340 deaths. this work presents the results of survey efforts to detect the yellow fever virus in mosquitoes from two conservation areas in the metropolitan region of belo horizonte, brazil. a total of 867 mosquitoes of 20 species were collected between september 2017 and may 2018 ... | 2019 | 31083286 |
| haemagogus leucocelaenus and haemagogus janthinomys are the primary vectors in the major yellow fever outbreak in brazil, 2016-2018. | the yellow fever virus (yfv) caused a severe outbreak in brazil in 2016-2018 that rapidly spread across the atlantic forest in its most populated region without viral circulation for almost 80 years. a comprehensive entomological survey combining analysis of distribution, abundance and yfv natural infection in mosquitoes captured before and during the outbreak was conducted in 44 municipalities of five brazilian states. in total, 17,662 mosquitoes of 89 species were collected. before evidence of ... | 2019 | 30866775 |
| distribution of haemagogus and sabethes species in relation to forest cover and climatic factors in the chapada dos guimarães national park, state of mato grosso, brazil. | members of the genera haemagogus and sabethes are the most important biological vectors of the wild yellow fever virus (wyf) in the forested areas of the americas. the ecologies of haemagogus janthinomys, hg. leucocelaenus, sabethes chloropterus, and sa. glaucodaemon were studied in a forest of the chapada dos guimarães national park, state of mato grosso, brazil, to evaluate the influence of climatic factors (temperature and relative humidity [rh]) on their abundance. we also examined the assoc ... | 2018 | 31442164 |
| evaluation of multiple immersion effects on eggs from haemagogus leucocelaenus, haemagogus janthinomys, and aedes albopictus (diptera: culicidae) under experimental conditions. | studies on the bioecology of haemagogus leucocelaenus dyar and shannon 1924, haemagogus janthinomys dyar 1921, aedes albopictus skuse 1895 (diptera: culicidae) mosquitos are extremely important from an epidemiologic point of view, as they are known to be vectors of many important pathogens and, therefore, act as the main factor responsible for the maintenance of several zoonoses natural cycles. the present work aimed to elucidate their seasonal egg-hatching rate using the immersion method. ovitr ... | 2018 | 29846652 |
| distribution of the mosquito communities (diptera: culicidae) in oviposition traps introduced into the atlantic forest in the state of rio de janeiro, brazil. | the atlantic rainforest of south america is one of the major biodiversity hotspots of the world and serves as a place of residence for a wide variety of culicidae species. mosquito studies in the natural environment are of considerable importance because of their role in transmitting pathogens to both humans and other vertebrates. community diversity can have significant effects on the risk of their disease transmission. the objective of this study was to understand the distribution of mosquito ... | 2018 | 29595406 |