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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 ...19979288803
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 ...200212656130
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 ...200312892055
[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.200818645665
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.201020802950
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.201727384833
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 ...201323926776
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.201525810711
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.201324626304
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 ...201020428674
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 ...200919432064
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 ...200111596099
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 ...201726709451
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 ...19901971734
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