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antibodies for several viruses from nonspecific inhibitors. The procedure is fast, simple to perform, and removed the nonspecific inhibitors for influenza, Western equine encephalitis, dengue-2, and rubella viruses.

Alvarez, M. E. and C. H. Ramirez Ronda (1985). "Dengue and hepatic failure." Am.J.Med. 79: 670-674.
Dengue hemorrhagic fever/dengue shock syndrome is a serious manifestation of dengue fever, which is observed predominantly in the tropical regions of the West Pacific and in Southeast Asia and is associated with secondary infections, mainly in children under age 15. A concomitant microangiopathic coagulopathy has been described; moreover, encephalopathy and even Reye's syndrome have been rarely reported. This report describes a 51-year-old man with secondary dengue infection who presented with clinical evidence of severe hepatitis, encephalopathy, cranial nerve palsy, and microangiopathic coagulopathy and who had a favorable outcome. A careful surveillance for the occurrence of secondary dengue in the Western Hemisphere is proposed, and dengue is suggested as a diagnostic possibility in obscure febrile illnesses presenting as either hepatitis, encephalopathy, or coagulopathy in places in which the mosquito vector, Aedes aegypti, is present.

Alves, M. C., S. Gurgel, et al. (1991). "[Sampling study for larval density quantification of Aedes aegypti and Aedes albopictus in the state of Sao Paulo, Brazil] Plano amostral para calculo de densidade larvaria de Aedes aegypti e Aedes albopictus no estado de Sao Paulo, Brasil." Rev.Saude.Publica. 25: 251-256.
The Yellow Fever and Dengue Vector Control Program developed by the Superintendency for the Control of Endemic Diseases in the State of S. Paulo recommends Aedes aegypti and Aedes albopictus larval density monitoring in cities with domiciliar infestation. The sampling plan which has been applied in the countries of the Presidente Prudente region (SP- Brazil) since 1987 is described. The infestation is measured by using the Breteau Index. A sample of buildings is drawn, monthly and independently, in the infested cities, in which measurements are to be made. The sample is stratified and the elementary unit selection is made by using two- stage cluster sampling: of blocks and buildings. The sample sizes were defined using the coefficient of variation and the intraclass correlation as estimated for towns covered by the Regional Health Service of S. Jose do Rio Preto. These sizes must be corrected periodically in accordance with the values of the Breteau Index and its variance obtained in previous months.

Anderson, A. O., L. F. Snyder, et al. (1988). "Mucosal priming alters pathogenesis of Rift valley fever." Adv.Exp.Med.Biol. 237: 717-723.

Anderson, R., A. D. King, et al. (1992). "Correlation of E protein binding with cell susceptibility to dengue 4 virus infection." J.Gen.Virol. 73: 2155-2159.
Supernatant culture fluids from dengue virus type 4 (DEN-4)- infected cultures of monkey kidney Vero cells and Aedes albopictus