| [yellow fever epidemiology in brazil]. | we have carried out a meticulous time-space-analysis of the incidence of yellow fever in humans in brazil from 1954 to 1972 and especially from 1973 to 1999. this study has added to our knowledge of the epidemiology of yellow fever and enabled us to redefine epidemiological zones and determine their geographical limits. the endemic area is located within the amazon basin; here cases are scattered and generally limited in number. however, there are also "foci of endemic emergence" within this are ... | 2001 | 11681224 |
| new tools for surveillance of adult yellow fever mosquitoes: comparison of trap catches with human landing rates in an urban environment. | a novel mosquito trapping system, the bg-sentinel trap, was evaluated as a monitoring tool for adult aedes aegypti in field tests in the city of belo horizonte, brazil. human landing/biting collections, a gas-powered co2 trap, and a fay-prince trap with only visual cues serving as references to evaluate the efficacy of the new trap. the bg-sentinel is a simple suction trap that uses upward-directed air currents as well as visual cues to attract mosquitoes. the trap was tested with a new dispense ... | 2006 | 17019768 |
| 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 |
| [effectiveness of the yellow fever vaccine 17d: an epidemiologic evaluation in health services]. | the purpose of this study was to evaluate the efficacy of the 17d yellow fever vaccine in the conditions under which it is used in public health services. in 1989, a nonconcurrent prospective study was carried out in bocaiúva, minas gerais state, brazil, 6 months after mass vaccination of the population. the study population was made up of first-grade students from all the schools in bocaiúva. the exposed group consisted of a simple random sample of vaccinated students (n = 173) and the unexpose ... | 1997 | 9312418 |
| isolation and characterization of wild type yellow fever virus in cases temporally associated with 17dd vaccination during an outbreak of yellow fever in brazil. | a mass vaccination was carried out in the state of minas gerais, southeast region of brazil, to control an outbreak of sylvatic yellow fever in 2001. during the outbreak the surveillance system identified two fatal cases temporally associated with yf vaccination. virus recovered from blood and postmortem samples of both cases was identified as yellow fever virus. partial nucleotide sequence of parts of prm/e and the non-structural (ns) 5 genes and 3' non-coding region (3' ncr) was employed to ch ... | 2004 | 15003633 |
| outbreak of jaundice and hemorrhagic fever in the southeast of brazil in 2001: detection and molecular characterization of yellow fever virus. | between january and march 2001, an outbreak of jaundice and hemorrhagic fever occurred in the state of minas gerais, southeast region of brazil, in which a mortality rate of 53% was reported. seroconversion, virus isolation, histopathological and immunohistochemical findings, and reverse transcription-polymerase chain reaction (rt-pcr) identified yellow fever virus (yfv) as the etiological agent responsible for the outbreak. partial nucleotide sequence analysis from a fragment of the yfv genome ... | 2002 | 12376973 |
| 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 |