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1.
Rev. cuba. endocrinol ; 31(3): e206, sept.-dic. 2020. tab, graf
Article in Spanish | LILACS, CUMED | ID: biblio-1156395

ABSTRACT

La diabetes insípida es el resultado de una secreción o acción reducidas de la hormona vasopresina, expresada clínicamente por un cuadro de poliuria-polidipsia. Los arbovirus pueden tener afinidad por el sistema nervioso y se ha demostrado que el Zika desencadena un trastorno autoinmune que ataca a las células nerviosas, lo que puede traer como consecuencia una diabetes insípida central. En la literatura médica nacional e internacional revisada no se reportan casos anteriores donde se vincule la diabetes insípida con el virus del Zika. Se presenta un caso a propósito de esta asociación: paciente femenina de 53 años, diagnosticada con infección por el virus del Zika dos semanas antes de comenzar con los síntomas sugestivos de diabetes insípida. El potencial neurotrópico del virus, así como los resultados en la resonancia magnética nuclear y la determinación de marcadores de autoinmunidad anti-ADNdc positivos, son elementos que apoyan la hipótesis de que la paciente presentó una posible hipofisitis autoinmune, como respuesta inflamatoria post-infección, desarrollando diabetes insípida central transitoria(AU)


Diabetes insipidus is the result of reduced secretion or action of the vasopressin hormone, which is clinically expressed by a polyuria-polydipsia picture. Arboviruses can have a nervous system affinity and Zika has been shown to trigger an autoimmune disorder that attacks nerve cells, which can result in central diabetes insipidus. The reviewed national and international medical literatures does not report previous cases linking diabetes insipidus with Zika virus. It is presented a case about this association: 53-year-old female patient diagnosed with Zika virus infection two weeks before starting symptoms suggestive of diabetes insipidus. The neurotropic potential of the virus, as well as the results in nuclear MRI and the determination of positive anti-ADNdc autoimmunity markers are elements that support the hypothesis that the patient had a possible autoimmune hypophysis, as a post-infection inflammatory response, developing transient central diabetes insipidus(AU)


Subject(s)
Humans , Female , Middle Aged , Autoimmunity , Diabetes Insipidus/etiology , Zika Virus Infection/diagnosis , Arboviruses/immunology , Review Literature as Topic , Magnetic Resonance Spectroscopy/methods
3.
Rev. Soc. Bras. Med. Trop ; Rev. Soc. Bras. Med. Trop;46(6): 684-690, Nov-Dec/2013. tab, graf
Article in English | LILACS | ID: lil-698054

ABSTRACT

Introduction A sero-epidemiological survey was undertaken to detect the circulation of arboviruses in free-living non-human primates. Methods Blood samples were obtained from 16 non-human primates (13 Sapajus spp. and three Alouatta caraya) that were captured using terrestrial traps and anesthetic darts in woodland regions in the municipalities of Campo Grande, Aquidauana, Jardim, Miranda and Corumbá in the State of Mato Grosso do Sul, Brazil. The samples were sent to the Instituto Evandro Chagas (IEC) in Ananindeua, Pará, Brazil, to detect antibodies against 19 species of arboviruses using a hemagglutination inhibition test (HI). Results Of the 16 primates investigated in the present study, five (31.2%) were serologically positive for an arbovirus. Of these five, two (12.5%) exhibited antibodies to the Flavivirus genus, one (6.2%) exhibited a monotypic reaction to Cacipacoré virus, one (6.2%) was associated with Mayaro virus, and one (6.2%) was positive for Oropouche virus. Conclusions Based on the positive serology observed in the present study, it was possible to conclude that arboviruses circulate among free-living primates. The viruses in the areas studied might have been introduced by infected humans or by primates from endemic or enzootic areas. Studies of this nature, as well as efficient and continuous surveillance programs, are needed to monitor viral activities in endemic and enzootic regions. .


Subject(s)
Animals , Female , Male , Alouatta/virology , Arboviruses/isolation & purification , Carrier State/veterinary , Antibodies, Viral/blood , Arboviruses/immunology , Brazil/epidemiology , Carrier State/virology , Hemagglutination Inhibition Tests , Seroepidemiologic Studies
4.
Cad. saúde pública ; Cad. Saúde Pública (Online);25(12): 2583-2602, dez. 2009. tab, ilus
Article in Portuguese | LILACS | ID: lil-538397

ABSTRACT

O presente estudo descreve os aspectos eco-epidemiológicos sobre arbovírus nos Municípios de Novo Progresso e Trairão, Estado do Pará, Brasil, na área de influência da BR 163. Anticorpos IH foram detectados para diferentes arbovírus, com reações monotípicas para os VMAY e VORO, dois importantes arbovírus associados a epidemias na Amazônia. Anticorpos IgM para o VORO e VMAY foram detectados em soros humanos, sugerindo infecção recente por esses arbovírus. Duas cepas do VDEN-3 foram isoladas de pacientes febris residentes em Novo Progresso e identificadas como genótipo III. Em termos gerais, os dados obtidos sugerem uma área propícia para a circulação e manutenção de arbovírus e uma população pouco imunizada. Portanto, é importante um monitoramento dinâmico das populações locais e de imigrantes e de animais silvestres quanto à presença de anticorpos e isolamentos de arbovírus, o que permitirá um efetivo controle das infecções por esses agentes virais em residentes da área da rodovia dentro do território paraense.


The current study describes the eco-epidemiological aspects of arbovirus diseases in the municipalities (counties) of Novo Progresso and Trairão, Para State, Brazil, in the area affected by highway BR-163. Hemagglutination inhibition (HI) antibodies to different arboviruses were detected, with monotypic reactions to MAYV and OROV, two important arboviruses associated with epidemics in the Amazon. IgM antibodies to OROV and MAYV were found in human sera, suggesting recent infections by these viruses. Two DENV-3 strains were isolated from febrile patients in Novo Progresso and identified as genotype III strains. In general, the data suggest that the area displays ideal conditions for maintenance and circulation of arboviruses, plus a population with low immunization levels. Dynamic surveillance of local immigrants and wild animals is thus important, focusing on antibody prevalence and isolation of arboviruses, thereby allowing effective control of infections by these viral agents in the resident population along highway BR-163 in Pará State.


Subject(s)
Adult , Animals , Female , Humans , Male , Antibodies, Viral/blood , Arbovirus Infections/epidemiology , Arbovirus Infections/veterinary , Arboviruses/immunology , Disease Outbreaks , Environmental Monitoring/statistics & numerical data , Arbovirus Infections/virology , Arthropod Vectors/virology , Brazil/epidemiology , Disease Vectors , Ecosystem , Immunoglobulin M/blood , Species Specificity , Urbanization
5.
Cad. saúde pública ; Cad. Saúde Pública (Online);25(11): 2517-2523, nov. 2009. graf, mapas, tab
Article in Portuguese | LILACS | ID: lil-531169

ABSTRACT

O objetivo foi avaliar a prevalência de anticorpos para arbovírus na área de influência do Projeto Juruti antes da exploração mineral local. Foram examinados 1.597 soros humanos e 85 de animais silvestres. A pesquisa de anticorpos foi realizada pelo teste de inibição da hemaglutinação contra antígenos dos arbovírus mais prevalentes na Amazônia brasileira e IgM-ELISA para dengue e febre amarela. Soros humanos inibidores da hemaglutinação positivos para Mayaro e Oropouche foram também testados por IgM-ELISA. Anticorpos inibidores da hemaglutinação para alfavírus, orthobunyavirus e/ou flavivírus foram detectados, sendo 28,7 por cento reações monotípicas. Infecções recentes para Oropouche (n = 23), Mayaro (n = 5), e dengue (n = 20) foram confirmadas por IgM-ELISA. A prevalência de anticorpos inibidores da hemaglutinação em soros de animais silvestres foi de 8,2 por cento para flavivírus. Os resultados obtidos mostram que houve circulação ativa dos vírus Mayaro, Oropouche e dengue no período do estudo em humanos em Juruti, Pará, Brasil, e de diversos arbovírus em animais silvestres, indicando presença desses vírus em áreas do Município de Juruti.


This study aimed to measure the prevalence of antibodies to arboviruses in the area affected by the Juruti Project before local mining operations. A total of 1,597 human and 85 wild animal sera were examined, using the hemagglutination inhibition test against 19 antigens from the most prevalent arboviruses in the Brazilian Amazon and IgM-ELISA for dengue and yellow fever. Positive sera for Mayaro and Oropouche viruses were also tested by IgM-ELISA. Prevalence of hemagglutination inhibition antibodies to alphaviruses, flaviviruses, and orthobunyaviruses in humans was 28.7 percent, while for wild animals it was 8.2 percent for flaviviruses. Recent infections based on presence of IgM was confirmed for Mayaro (n = 5), Oropouche (n = 23), and dengue (n = 20). The results showed active circulation of the dengue, Mayaro, and Oropouche viruses in Juruti, as well as flaviviruses in wild animals, suggesting the circulation of these viruses in the Municipality of Juruti.


Subject(s)
Animals , Female , Humans , Male , Antibodies, Viral/blood , Arbovirus Infections/epidemiology , Arboviruses/immunology , Immunoglobulin M/blood , Arbovirus Infections/diagnosis , Birds/virology , Brazil/epidemiology , Enzyme-Linked Immunosorbent Assay , Hemagglutination Inhibition Tests , Marsupialia/virology , Rodentia/virology , Seroepidemiologic Studies
6.
Cad. saúde pública ; Cad. Saúde Pública (Online);22(6): 1325-1334, jun. 2006. mapas, tab
Article in English | LILACS | ID: lil-428313

ABSTRACT

The authors describe the baseline malaria prevalence and arbovirus seroprevalence among 467 subjects in an ongoing cohort study in rural Amazonia. Most subjects (72.2 percent) reported one or more previous episodes of malaria, and 15.6 percent had been hospitalized for malaria, but only 3.6 percent of individuals five years or older had malaria parasites detected by microscopy (10 with Plasmodium vivax and 4 with P. falciparum). Antibodies to Alphavirus, Orthobunyavirus, and/or Flavivirus were detected by hemagglutination inhibition (HI) in 42.6 percent of subjects aged five years or older, with a higher seropositivity rate among males (49.2 percent) than females (36.2 percent). Since 98.9 percent of subjects had been immunized for yellow fever, the presence of cross-reactive antibodies to dengue and other Flaviviruses cannot be ruled out, but at least 12 subjects (3.3 percent) with IgM antibodies to dengue virus detected by ELISA had a putative recent exposure to this virus.


Subject(s)
Adolescent , Adult , Child , Child, Preschool , Female , Humans , Infant , Male , Middle Aged , Arbovirus Infections/epidemiology , Endemic Diseases , Malaria/epidemiology , Antibodies, Viral/blood , Arbovirus Infections/immunology , Arboviruses/immunology , Brazil/epidemiology , Cross Reactions , Dengue Virus/immunology , Ecosystem , Enzyme-Linked Immunosorbent Assay , Immunoglobulin G/blood , Malaria/immunology , Prevalence , Rural Population , Seroepidemiologic Studies , Sex Factors
7.
EMHJ-Eastern Mediterranean Health Journal. 2003; 9 (3): 266-273
in English | IMEMR | ID: emr-158162

ABSTRACT

Diseases caused by dengue, s and fly fever and hanta viruses pose a major health risk in many countries. We determined the threat of these arboviral infections through a serologic using enzyme linked immunosorbent assay [ELISA] based tests. Hantavirus-specific antibodies were also detected using immunofluorescence. Of 499 samples tested for dengue virus IgG antibodies l4% were as positive for dengue positive by all the ELISA tests. Among the 42 showing strong IgG reactivity, only 1 was positive for dengue virus IgM antibodies. All samples tested for IgG antibodies to s and fly fever virus were negative. Hantavirus antibodies were detected in 11% of the 46 samples from high-risk individuals. The low prevalences suggest that at present these infections are not a serious problem in Kuwait


Subject(s)
Adolescent , Adult , Child , Humans , Infant , Middle Aged , Age Distribution , Antibodies, Viral/blood , Arboviruses/immunology , Bunyaviridae/immunology , Dengue/epidemiology , Enzyme-Linked Immunosorbent Assay , Orthohantavirus/immunology , Hantavirus Infections/epidemiology , Phlebotomus Fever/blood
8.
Rev. saúde pública ; Rev. saúde pública;34(3): 236-42, jun. 2000. tab
Article in Portuguese | LILACS | ID: lil-263753

ABSTRACT

Objetivo: Inquéritos sorológicos têm evidenciado ampla circulaçäo de arbovírus causadores de doença humana na Regiäo do Vale do Ribeira, Säo Paulo, Brasil. Com o propósito de estabelecer a prevalência de infecçöes por esses agentes em reserva ecológica, localizada naquela área, pesquisou-se a presença de anticorpos, bem como suas possíveis associaçöes com características individuais e familiares dos investigados. Métodos: Pesquisaram-se anticorpos para os antígenos dos vírus Rocio (ROC), Ilhéus (ILH), encefalite de St. Louis (SLE), encefalites eqüinas do leste (EEE), oeste (WEE) e venezuelana (VEE), em 182 pessoas pertencentes a 58 famílias residentes na Estaçäo Ecológica de Juréia-Itatins, utilizando-se testes de inibiçäo de hemaglutinaçäo e neutralizaçäo com reduçäo de placas. Usou-se Mac-Elisa para pesquisar anticorpos IgM para os vírus ROC, ILH e EEE. Resultados: Foi observada a presença de anticorpos para todos os arbovírus testados, com exceçäo do vírus WEE. A prevalência total de anticorpos foi 26,9 por cento (21,4 por cento para alfavírus e 12,6 por cento para flavivírus). Näo foram encontrados anticorpos IgM. Entre as várias características pesquisadas dos indivíduos e de suas famílias, a idade, a ocupaçäo, a naturalidade e o hábito de entrar na mata mostraram-se estatisticamente associados a infecçöes por arbovírus (p<0,05). Conclusöes: Existe intensa circulaçäo de arbovírus patogênicos, especialmente do alfavírus VEE, na populaçäo estudada. Aparentemente, a principal forma de exposiçäo a vetores de arbovírus nessa populaçäo é o hábito de entrar na mata. Sugerem-se outras investigaçöes sobre a responsabilidade de aves atuando como amplificadores de vírus dentro dos domicílios


Subject(s)
Humans , Arboviruses/immunology , Arbovirus Infections/epidemiology , Risk Factors , Natural Reservations , Antibodies/isolation & purification , Hemagglutination Inhibition Tests , Neutralization Tests
9.
In. Travassos da Rosa, Amelia P. A; Vasconcelos, Pedro F. C; Travassos da Rosa, Jorge F. S. An Overview of Arbovirology in Brazil and Neighbouring Countries. Belem, Instituto Evandro Chagas, 1998. p.193-218, mapas, tab, graf.
Monography in English | LILACS | ID: lil-248908

ABSTRACT

Arthropode-Borne viral diseases have been a significant cause of morbidity and mortality for several decades in Peru. Epidemics and epizootics of Venezuelan equine encephalitis (VEE), subtype IAB virus occurred among humans and equine at intermittent intervals from 1925 through 1973 along the Pacific coastal plains, extending southward from the most northern Departament of Tumbes to the Departament of Ica. While the VEE IAB virus has not been detected since 1973, several isolates of VEE ID and an isolate VEE IIIC were obtained during 1971 and 1975 from mosquitoes and/or sentinel hamster in Quistococha, northeastern Amazon region. In 1994, the first human cases, associated with VEE virus ID were diagnosed among Peruvian soldiers near Pantoja, northern Amazon region, and during 1995, primarily among students and military personnel in Iquitos, northastern Amazon region. As early as 1913 , a disease resembling yellow fever was recognized in the Amazon region Peru. Outbreaks of this disease have continued to occur, apparently at annual interval, with the most recent and the largest sylvan outbreak ever recorded in Peru being documented during 1995 along the eastern foothills of the Andes Mountains. In 1990, dengue (DEN) 1 and DEN4 were first isolated in Peru during an outbreak of DEN fever among residents of the city of Iquitos, northeastern Amazon basin region. Seroepidemiological and case surveillance studies conducted 1992 through 1995 documented that DEN 1 continued to cause cases of DEN fever in Iquitos, and in 1995, an outbreak was associated with the introduction of DEN 2 into the community. Outbreaks of DEN fever, associated with DEN 1 occurred during 1994 and 1995 in the northern coastal cities of Tumbes and Piura, and in Pucallpa, Amazon basin region. In 1995, the first isolations of DEN 2 were obtained from febriles cases in Tumbes, Piura and Pucallpa. Although 2 serotypes of DEN were associated with human infection, none of the cases presented with hemorragic manifestations. The first isolations of Oropouche (ORO) fever virus were obtained during 1992 from febrile patients in Iquitos. The virus was isolated during 1994 from febrile cases and serological results revealed that ORO was the cause of an outbreak in the southeastern Amazon region. A single isolate of ORO virus was obtained during 1995 from a febrile patient in Iquitos


Subject(s)
Arbovirus Infections/diagnosis , Arbovirus Infections/epidemiology , Arbovirus Infections/history , Arbovirus Infections/immunology , Arboviruses/immunology , Arboviruses/isolation & purification , Dengue/diagnosis , Dengue/epidemiology , Encephalomyelitis, Venezuelan Equine , Molecular Biology , Peru , Yellow Fever/epidemiology , Yellow Fever/immunology
10.
Rev. Soc. Bras. Med. Trop ; Rev. Soc. Bras. Med. Trop;30(6): 511-515, nov.-dez. 1997.
Article in Portuguese | LILACS | ID: lil-464128

ABSTRACT

Oito casos com anticorpos anti-Rocio são descritos, de quatro cidades do Estado da Bahia, sendo seis portadores de anticorpos IgG (IH e TN) e dois IgM (ELISA e TN). Os autores comentam sobre a circulação deste arbovírus no Estado, e as possibilidades de reações cruzadas com outros vírus antigenicamente relacionados.


Eight antibody anti-Rocio cases, from four distinct cities in the state of Bahia, are described; six of them being carriers of the antibody IgG (HI and NT) and two IgM (ELISA and NT). The authors comment on the circulation of these arboviruses in the state of Bahia and on the possibility of cross reactions with other antigenically related viruses.


Subject(s)
Adolescent , Adult , Aged , Child , Female , Humans , Male , Middle Aged , Antibodies, Viral/blood , Arboviruses/immunology , Brazil/epidemiology , Arbovirus Infections/epidemiology , Arbovirus Infections/immunology , Urban Population/statistics & numerical data , Carrier State/epidemiology , Carrier State/immunology , Seroepidemiologic Studies
11.
In. Leäo, Raimundo Nonato Queiroz de; Bichara, Cléa Nazaré Carneiro; Miranda, Esther Castello Branco Mello; Carneiro, Irna Carla do Rosário de Souza; Abdon, Nagib Ponteira; Vasconcelos, Pedro Fernando da Costa; Silva, Bibiane Monteiro da; Paes, Andréa Luzia Vaz; Marsola, Lourival Rodrigues. Doenças Infecciosas e Parasitárias: Enfoque Amazônico. Belém, Cejup:Universidade do Estado do Pará:Instituto Evandro Chagas, 1997. p.207-25, mapas, tab.
Monography in Portuguese | LILACS | ID: lil-248925
12.
Rev. argent. microbiol ; Rev. argent. microbiol;23(2): 90-6, abr.-jun. 1991. mapas, tab
Article in Spanish | LILACS | ID: lil-117779

ABSTRACT

Con la intención de localizar y medir la prevalencia de anticuerpos contra Flavivirus se analizaron por la técnica de inhibición de la hemoaglutinación 479 sueros provenientes de personas que habitan el territorio misionero de la República Argentina y 49 sueros humanos de la provincia de Corrientes. Se estudiaron localidades ribereñas con un tránsito importante con Paraguay y/o Brasil, con el objeto de verificar la posible introducción del Dengue desde estos países. En Ituzaingó (Corrientes) se encontraron dos sueros positivos para Dengue 2. En Misiones se encontraron 3 sueros positivos en Oberá y 2 en Montecarlo para Dengue 2 mientras que en Puerto Iguazú un suero fue reactivo contra Dengue. 1. La seroprevalencia en las poblaciones ribereñas fue significativamente mayor al de las poblaciones de montaña. Las poblaciones sobre el río Uruguay. El 54% de los sueros presentó mayor reactividad para SLE que para FA y Dengue. En los sueros de Misiones se analizaron, a su vez, los anticuerpos contra los alfa-virus EEE y WEE; se observó un patron de distribución complementario con respecto a los flavivirus, siendo mayor la seroprevalencia en las poblaciones de montaña y, dentro de las rivereñas, en las del río Uruguay


Subject(s)
Humans , Arboviruses/isolation & purification , Arbovirus Infections/epidemiology , Antibodies, Viral/blood , Arboviruses/immunology , Argentina/epidemiology , Arbovirus Infections/microbiology , Arbovirus Infections/transmission , Prevalence
13.
Rev. Inst. Med. Trop. Säo Paulo ; Rev. Inst. Med. Trop. Säo Paulo;32(3): 215-20, maio-jun. 1990. tab
Article in English | LILACS | ID: lil-103598

ABSTRACT

Sera from 299 fishermen 16 to 80 years old, residents in Cananeia and Iguape counties, southern cost of Säo Paulo State, Brazil, were studied in order to identify a possible association between the prevalance of specific antibodies to the hepatitis B virus (HBV) and exposure to haematophagus mosquitoes evaluated by the prevalence of arbovirus antibodies. This professional group presented the highest prevalence of arbovirus antibodies (54.1%) in past investigations carried out in this heavily forested region. Detection of antibody to hepatitis B core antigen (anti-HBc) in the sera was done by enzyme immunoassay (Roche). Prevalence of anti-HBc antibodies in this group was 31,4% (94/299) which is very high compared with 7,2% to 15.0% for different groups of healthy adults in State of Säo Paulo. No significant difference is observed between the prevalences of HBV antibodies in Iguape and Cananeia. Prevalence of anti-HBc and anti-arbovirus antibodies increases with age. There is a concordance in the distribution according to age groups of the frequency of anti-HBc and anti-arbovirus positivesera. Ag HBs was detected in 4% of the studied sera. These results support the hypothesis that the transmission of the hepatitis B virus and the arboviruses may be due to the same factor, one of the possibilities would be by anthropophilic mosquitoes


Subject(s)
Adolescent , Adult , Middle Aged , Humans , Male , Antibodies, Viral/analysis , Arboviruses/immunology , Hepatitis B Antibodies/analysis , Hepatitis B Core Antigens/immunology , Brazil , Culicidae/microbiology , Disease Vectors , Fisheries , Hepatitis B/transmission , Prevalence
14.
Rev. cuba. med. trop ; 41(3): 362-70, sept.-dic. 1989. tab
Article in Spanish | LILACS | ID: lil-85549

ABSTRACT

Se realizó un estudio serológico en 2 grupos poblacionales de la Isla de la Juventud. Un total de 268 muestras de sangre en papel de filtro fueron trabajadas por la técnica de inhibición de la hemaglutinación, utilizando los virus de la encefalomielitis equina del Este, encefalomielitis equina del Oeste, encefalitis de San Luis y dengue 2, y se encontró el 16 % de positividad a flavirus. Se fectuó una segunda toma de muestra de suero a las personas que resultaron positivas por la técnica de inhibición de la hemaglutinación, para realizar las técnicas de fijación del complemento y neutralización por reducción de placas. Nueve casos presentaron anticuerpos fijadores del complemento, indicativo de una infección reciente, y en 29 casos se detectó anticuerpos neutralizantes al virus de la encefalitis de San Luis


Subject(s)
Infant, Newborn , Infant , Child, Preschool , Child , Adolescent , Adult , Middle Aged , Humans , Male , Female , Arboviruses/immunology , Complement Fixation Tests , Hemagglutination Inhibition Tests
15.
Rev. Inst. Med. Trop. Säo Paulo ; Rev. Inst. Med. Trop. Säo Paulo;31(2): 103-9, mar.-abr. 1989. tab
Article in English | LILACS | ID: lil-102056

ABSTRACT

280 escolares de 6 a 14 anos de idade, residentes em Iguape, Vale do Ribeira, sudeste do estado de Säo Paulo, foram estudados com o objetivo de verificar possível associaçäo entre a prevalência de anticorpos para hepatite B e a exposiçäo a mosquitos hematófagos, avaliada indiretamente pela prevalência de anticorpos de arbovírus. As crianças eram originárias de 4 áreas com características topográficas e fitográficas diferentes: 89 residiam em área urbana, 89 em área periurbana, 30 em área de cultivo extensivo de banana e hotaliças e 72 em área florestal. Estudos prévios mostraram significante maior prevalência de anticorpos de arbovírus nas áreas cultivada e florestal do que nas áreas urbana e periurbana. A pesquisa de anti-HBs foi feita por radioimunoensaio (Ausab, Laboratório Abbott) e de anti-HBc por ensaio imunenzimático (Rocha). Observou-se que os escolares residentes na área florestal apresentaram mais alta prevalência (26/71 = 36.1%) de anticorpos para hepatite B de que os residentes nas áreas urbana (5/89 = 5.6%), periurbana (6/89 = 6.7%) e cultivada (0.30 = 0%). Os resultados sugerem a existência de fator comum na transmissäo de arboviroses e de hepatite B, apoiado a hipótese que nas regiöes tropicais com presença de mata moaquitos possam desmpenhar importante papel na transmissäo da hepatite B


Subject(s)
Humans , Animals , Male , Female , Child , Adolescent , Antibodies, Viral/analysis , Arboviruses/immunology , Hepatitis B virus/immunology , Brazil , Culicidae/microbiology , Hepatitis B Antibodies/analysis , Hepatitis B/transmission , Arbovirus Infections/transmission , Tropical Climate
16.
Egyptian Journal of Veterinary Science. 1989; 26 (1-2): 143-149
in English | IMEMR | ID: emr-119848

ABSTRACT

The cytotoxic T lymphocyte activity in C3H mice hyperimmunized with quaranfil virus [QRF-V] was investigated. Mice primed with QRF-V developed moderate cytotoxic activity mediated by spleen cytotoxic T lymphocytes C3H mice have a higher adaptive protective immune response to QRF-V than Swiss albino mice


Subject(s)
Arboviruses/immunology , Immunity, Cellular , Mice
18.
Mem. Inst. Oswaldo Cruz ; 81(4): 351-8, Oct.-Dec. 1986. mapas, tab
Article in Portuguese | LILACS | ID: lil-39844

ABSTRACT

Foi realizado um estudo sorológico para verificaçäo da presença de anticorpos para arbovírus em 288 indivíduos, residentes no povoado de Corte de Pedra, Valença, Bahia. Foram observados anticorpos inibidores de hemaglutinaçäo e neutralizantes em 3.8% da amostra com a seguinte distribuiçäo para flavivírus: Ilhéus (6), St. Louis (2), febre amarela (3), Rocio (1). Em um indivíduo, com residência anterior na Regiäo Norte foram detectados anticorpos para Mayaro. Em 75 indivíduos testados aleatoriamente näo foram observados anticorpos neutralizantes para o vesiculovírus Piry. Em outros 28 indivíduos, também selecionados ao acaso, anticorpos fixadores de complemento näo foram detectados para os vírus dos grupos Changuinola, Phlebotomus e näo grupados BE AR 408005 e BE AR 421710. Chama-se a atençäo para a necessidade de estudos complementares para esclarecer a transmissäo do vírus na área


Subject(s)
Child , Adolescent , Adult , Middle Aged , Humans , Male , Female , Antibodies, Viral/analysis , Arboviruses/immunology , Brazil , Hemagglutination Inhibition Tests , Neutralization Tests , Rural Health
19.
Rev. saúde pública ; Rev. saúde pública;20(3): 204-11, jun. 1986. tab
Article in Portuguese | LILACS | ID: lil-35162

ABSTRACT

Com o objetivo de conhecer os níveis de anticorpos para arbovírus, foram estudados 302 indivíduos da regiäo de Ribeiräo Preto (Brasil), moradores em 3 tipos de locais com distintas formas de organizaçäo do espaço: próximos à área de paisagem natural; com paisagem modificada para a agropecuária; comunidades urbanas. Foram efetuados testes sorológicos de inibiçäo da hemaglutinaçäo, neutralizaçäo e fixaçäo do complemento para 21 arbovírus. Os resultados mostraram que 19,9% dos indivíduos investigados apresentaram anticorpos, sugerindo infecçöes pregressas por vários arbovírus. A maior percentagem de habitantes que se infectaram por estes agentes foi observada em locais próximos à área de paisagem natural, 38,5%. O vesiculovírus Piry foi o agente para o qual se encontrou o maior número de soros reagentes, 12,5%. A maior ocorrência de portadores de anticorpos para o vírus Piry foi observada nos indivíduos: do sexo masculino; com idade superior a 40 anos; guardas-florestais, lavradores e profissionais com atividades ligadas ao rio


Subject(s)
Adolescent , Adult , Middle Aged , Humans , Male , Female , Arboviruses/immunology , Serologic Tests/methods , Antibodies, Viral/analysis , Brazil , Complement Fixation Tests , Hemagglutination Inhibition Tests , Neutralization Tests , Ecology
20.
Rev. Inst. Med. Trop. Säo Paulo ; Rev. Inst. Med. Trop. Säo Paulo;27(3): 157-61, maio - jun. 1985. ilus
Article in Portuguese | LILACS | ID: lil-1546

ABSTRACT

Como parte de um inquérito sorológico pesquisando anticorpos para arbovirus, em habitantes da regiäo de Ribeiräo Preto, 202 soros foram testados por neutralizaçäo em camundongos, para o vírus Piry. Trata-se de um vesículo-vírus (Rhabdoviridae) isolado em Belém do Pará, das vísceras de um marsupial e do sangue de um caso humano. P Piry é causa de doença humana aguda febril. Desconhece-se seus reservatórios animais, vetores e seu ciclo biológico. Os 202 soros testados foram obtidos por venopunçäo, de moradores adultos em áreas rurais e urbana da cidade de Ribeiräo Preto. Os resultados monstraram prevalência de 14,3% de anticorpos neutralizantes para o vírus Piry. Conclui-se que infecçöes pelo Piry, ou outro agente antigenicamente relacionado, ocorram edemicamente nesta regiäo


Subject(s)
Child , Adolescent , Adult , Middle Aged , Humans , Male , Female , Antibodies, Viral/analysis , Arboviruses/immunology , Brazil , Neutralization Tests
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