نتایج جستجو برای: yellow fever
تعداد نتایج: 127797 فیلتر نتایج به سال:
HE importance of host resistance as a factor in determining the T incidence of infectious disease has been emphasized in recent studies. The methods developed in the study of genetics have provided a practical means of investigating the problems of host resistance and from the accumulated data there can be no doubt of the existence of heritable factors which affect the response of the individua...
1. After preliminary experiments in monkeys, 15 persons were actively immunized by a single injection of a dried mixture of living yellow fever virus, fixed for mice, and human immune serum, with separate injections of enough additional serum to make up the amount required for protection. 2. One person was similarly immunized by injecting immune serum and dried virus separately. 3. By titration...
DESCRIPTION YF-VAX®, Yellow Fever Vaccine, for subcutaneous use, is prepared by culturing the 17D-204 strain of yellow fever virus in living avian leukosis virus-free (ALV-free) chicken embryos. The vaccine contains sorbitol and gelatin as a stabilizer, is lyophilized, and is hermetically sealed under nitrogen. No preservative is added. The vaccine must be reconstituted immediately before use w...
INTRODUCTION Sylvatic yellow fever (SYF) is enzootic in Brazil, causing periodic outbreaks in humans living near forest borders or in rural areas. In this study, the cycling patterns of this arbovirosis were analyzed. METHODS Spectral Fourier analysis was used to capture the periodicity patterns of SYF in time series. RESULTS SYF outbreaks have not increased in frequency, only in the number...
The current yellow fever outbreak in Brazil prompted widespread yellow fever virus (YFV) vaccination campaigns, imposing a responsibility to distinguish between vaccine- and wild-type YFV-associated disease. We developed novel multiplex real-time reverse transcription PCRs that differentiate between vaccine and American wild-type YFV. We validated these highly specific and sensitive assays in a...
This review attempts to follow the trail of the development of epidemiological aspects and concepts of yellow fever and yellow fever transmission (vectors, vertebrate hosts, spacing of epidemic outbreaks) with less emphasis on well-documented early history and more emphasis on epidemiological problems still remaining, plus discussion of possible means of resolving certain of these problems.
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