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1.
Mem. Inst. Oswaldo Cruz ; 111(4): 258-266, Apr. 2016. tab, graf
Article in English | LILACS | ID: lil-779000

ABSTRACT

This study was conducted to analyse the course and the outcome of the liver disease in the co-infected animals in order to evaluate a possible synergic effect of human parvovirus B19 (B19V) and hepatitis A virus (HAV) co-infection. Nine adult cynomolgus monkeys were inoculated with serum obtained from a fatal case of B19V infection and/or a faecal suspension of acute HAV. The presence of specific antibodies to HAV and B19V, liver enzyme levels, viraemia, haematological changes, and necroinflammatory liver lesions were used for monitoring the infections. Seroconversion was confirmed in all infected groups. A similar pattern of B19V infection to human disease was observed, which was characterised by high and persistent viraemia in association with reticulocytopenia and mild to moderate anaemia during the period of investigation (59 days). Additionally, the intranuclear inclusion bodies were observed in pro-erythroblast cell from an infected cynomolgus and B19V Ag in hepatocytes. The erythroid hypoplasia and decrease in lymphocyte counts were more evident in the co-infected group. The present results demonstrated, for the first time, the susceptibility of cynomolgus to B19V infection, but it did not show a worsening of liver histopathology in the co-infected group.


Subject(s)
Male , Hepatitis A virus , Hepatitis A/complications , Liver Failure, Acute/virology , Macaca fascicularis/virology , Parvoviridae Infections/complications , Parvovirus B19, Human , Antibodies, Viral/blood , Coinfection/virology , Disease Models, Animal , Hepatitis A virus/immunology , Hepatitis A/immunology , Parvoviridae Infections/immunology , Parvovirus B19, Human/immunology , Viremia
2.
Braz. j. microbiol ; 38(3): 424-429, July-Sept. 2007. ilus, tab
Article in English | LILACS | ID: lil-464765

ABSTRACT

Human cytomegalovirus (HCMV) displays genetic variability in several regions, supposed to be related with strain-specific tissue tropism and immunopathogenesis. Based on sequence variation in the UL55 gene that encodes gB glycoprotein, HCMV strains can be assigned to one of four genotypes. Previous studies have addressed gB genotyping mostly by investigating strains derived from immunosuppressed patients, sometimes without previous knowledge about genotype distribution in a geographic area. The present study verified the distribution of HCMV gB genotypes of strains obtained from immunocompetent women at Vitória City, Espírito Santo State, Southeastern, Brazil. The HCMV genome was extracted from their cervical secretion, fetal and maternal placenta tissues (chorionic villous and decidua) from abortion cases and from white blood cells (WBCs). HCMV genotyping was performed by restriction fragment length polymorphism analyses of amplified product from the high variability site of the UL55 gene. All four genotypes were observed in both cervical secretion and placenta, whereas in WBCs a single gB1 genotype was detected. HCMV gB1 and gB2 genotypes were detected, respectively, in nine and in six of the 23 studied samples, while gB3 and gB4 were each found in four separate samples of the total. The differences in genotype frequency were not considered statistically significant. No mixed genotype infection was observed. The results indicated that the four gB HCMV genotypes had no particular tropism for placenta tissues and that all genotypes circulated within immunocompetent women at the time and in the region of study.


O citomegalovírus humano (HCMV) apresenta variabilidade em diversas regiões do genoma, supostamente relacionada ao tropismo tecidual e imunopatogênese viral. Baseando-se na variação de seqüência do gene UL55 que codifica a glicoproteína gB, o HCMV pode ser classificado em um dos quatro genótipos. Estudos prévios têm investigado a associação destes genótipos a partir de cepas obtidas de pacientes imunossuprimidos. O presente estudo determinou os genótipos gB de cepas de HCMV obtidas de mulheres imunocompetentes em Vitória, Espírito Santo, Sudeste do Brasil. O genoma do HCMV foi extraído de secreção cervical, tecidos placentários fetais e maternos (vilosidade coriônica e decídua) obtidos de casos de aborto e de leucócitos do sangue periférico. A genotipagem foi realizada através da análise de polimorfismo de fragmentos de restrição do produto amplificado da região de alta variabilidade do gene UL55. Todos os quatro genótipos foram detectados na secreção cervical e na placenta, enquanto que somente o genótipo gB1 foi detectado em leucócitos. Genótipos gB1 e gB2 foram detectados em nove e seis das 23 cepas estudadas, respectivamente, enquanto gB3 e gB4 foram encontrados cada um em quatro casos. A diferença na freqüência de genótipos não foi estatisticamente significante. Infecção mista não foi detectada. Estes resultados indicam que os quarto genótipos de HCMV apresentam tropismo para os tecidos placentários e que todos eles circularam nas mulheres imunocompetentes no período e região geográfica do estudo.


Subject(s)
Female , Genetic Variation , Genome, Viral , Herpesviridae , In Vitro Techniques , Herpesviridae Infections/genetics , Placenta , Genotype , Methods , Sampling Studies , Virulence
3.
Rev. Soc. Bras. Med. Trop ; 39(5): 467-472, set.-out. 2006. tab
Article in Portuguese | LILACS | ID: lil-439898

ABSTRACT

Com o objetivo de medir a prevalência de anticorpos IgG contra o parvovírus B19 em gestantes com até 24 semanas de idade gestacional e detectar a ocorrência de casos de hidropisia fetal não-imune atribuídos a esse vírus, coletamos 249 amostras de soro em uma maternidade de referência na cidade do Rio de Janeiro, entre junho de 2003 e março de 2005. As gestantes foram acompanhadas até o termo da gestação, sendo detectados 17 casos de hidropisia fetal. Quatro casos foram atribuídos ao parvovírus B19 e dois destes ocorreram em gestantes residentes na zona oeste da cidade, em fevereiro de 2005. Resultados positivos para anticorpos IgG antiparvovírus B19 foram encontrados em 172 (71,6 por cento) gestantes (IC 95 por cento 65,5-77,7 por cento), sendo esta prevalência de anticorpos comparável à encontrada em outras cidades brasileiras. A única variável associada com aquisição prévia de anticorpos IgG foi número de gestações anteriores maior que um(p= 0,02, IC 95 por cento 0,36-0,94).


With the aim of measuring the prevalence of anti-parvovirus B19 IgG antibodies during pregnancy up to 24 weeks of gestation and detecting cases of nonimmune hydrops fetalis, 249 sera from pregnant women attending a reference hospital in Rio de Janeiro city, from June 2003 to November 2004 were collected. They were followed-up until the end of pregnancy, with 17 cases of fetal hydrops detected. Four cases were caused by parvovirus B19 and two of them occurred in pregnant women living in the western zone of the city, during February 2005. Anti-parvovirus B19 IgG antibodies were found in 172 (71.6 percent) pregnant women (CI 95 percent 65.5 percent-77.7 percent); this antibody prevalence is similar to results found for others Brazilian cities. The only variable associated with previous acquisition of IgG antibodies to parvovirus B19 was number of pregnancies greater than one (p= 0.02, CI 95 percent 0.36-0.94).


Subject(s)
Humans , Female , Pregnancy , Adolescent , Adult , Middle Aged , Hydrops Fetalis/virology , Parvoviridae Infections/epidemiology , /immunology , Pregnancy Complications, Infectious/virology , Antibodies, Viral/blood , Brazil/epidemiology , Hydrops Fetalis/diagnosis , Hydrops Fetalis/epidemiology , Immunoglobulin G/blood , Prevalence , Parvoviridae Infections/diagnosis , Pregnancy Complications, Infectious/diagnosis , Pregnancy Complications, Infectious/epidemiology , Risk Factors
4.
Mem. Inst. Oswaldo Cruz ; 101(4): 407-414, June 2006. ilus, tab
Article in English | LILACS | ID: lil-435302

ABSTRACT

Erythrovirus B19 infects erythrocytic progenitors, transiently interrupting erythropoiesis. In AIDS patients it causes chronic anemia amenable to treatment. We looked for evidences of B19 infection in stored bone marrow material from patients with acquired immunodeficiency syndrome. Histological sections were made from stored paraffin blocks from 33 autopsies (39 blocks) and 35 biopsies (45 blocks, 30 patients) performed from 1988 to 2002. They were examined after hematoxylin-eosin (HE) staining, immunohistochemical (IHC), and in situ hybridization. HE revealed intra-nuclear inclusion bodies ("lantern cells") suggesting B19 infection in 19 sections corresponding to 19 of 63 patients examined with this test. Seven of 78 sections subjected to immunohistochemistry were positive, corresponding to 7 of 58 patients examined with this test. Fourteen sections corresponding to 13 of the 20 HE and/or IHC positive patients were subjected to in situ hybridization, with six positives results. Among the 13 patients subjected to the three techniques, only one gave unequivocal positive results in all and was considered a true positive. The frequency of B19 infection (1/63 patients) in the material examined can be deemed low.


Subject(s)
Female , Humans , Male , AIDS-Related Opportunistic Infections/diagnosis , Bone Marrow/virology , Parvoviridae Infections/diagnosis , /isolation & purification , AIDS-Related Opportunistic Infections/pathology , AIDS-Related Opportunistic Infections/virology , Biopsy , Bone Marrow Examination/methods , Bone Marrow/pathology , Eosine Yellowish-(YS) , Hematoxylin , Immunohistochemistry , In Situ Hybridization , Paraffin Embedding , Parvoviridae Infections/pathology , Parvoviridae Infections/virology
5.
Braz. j. microbiol ; 36(2): 109-113, Apr.-June 2005. ilus, tab
Article in English | LILACS | ID: lil-421711

ABSTRACT

Sondas marcadas com biotina foram utilizadas neste trabalho para deteccão de infeccão viral por hibridizacão in situ em tecidos fixados com formalina e embebidos em parafina de 11 casos obtidos de abortamento. Sondas para citomegalovírus humano (HCMV), parvovírus B19 humano (B19) e adenovírus humano tipo 2 (HAd2), foram marcadas com biotina-11-dUTP através da reacão de nick-translation. Estreptavidina conjugada com fosfatase alcalina (SAP) seguida por solucão de 4-nitro-azul de tetrazolio/5-bromo-4-cloro-3-indolil fosfato (NBT/BCIP) foram utilizadas para deteccão da biotina após a reacão de hibridizacão. Reacão positiva foi observada no núcleo de células do epitélio glandular da decídua tanto no controle positivo quanto no negativo em tecidos de primeiro e segundo trimestre gestacional. Esta reacão não foi inibida com solucão bloqueadora da atividade endógena de fosfatase alcalina e persistiu mesmo com a omissão das sondas. O uso de controles negativos permitiu revelar atividade endógena de biotina nuclear em epitélio glandular da decídua, responsável por reacões falso positivas em sistemas de deteccão estreptavidina-biotina (StrepABC). Os resultados obtidos neste estudo fortemente recomendam que a deteccão de ADN por hibridizacão in situ em endométrio gestacional seja feita com outro sistema de deteccão que não o StrepABC.


Subject(s)
Humans , Biotin , Cytomegalovirus Infections , Epithelium , In Situ Hybridization , In Vitro Techniques , Methods
6.
Rev. saúde pública ; 39(3): 413-420, jun. 2005. tab
Article in English | LILACS | ID: lil-405319

ABSTRACT

OBJETIVO: Comparar a reatogenicidade de três vacinas contra a febre amarela (FA) das sub-cepas WHO-17D e 17DD (diferentes lotes-semente), e placebo. MÉTODOS: Foram recrutados 1.087 adultos elegíveis para vacinação contra FA no Rio de Janeiro, RJ, Brasil. Vacinas produzidas por Bio-Manguinhos, Fiocruz (Rio de Janeiro, RJ) foram administradas ("dia zero") seguindo procedimentos adaptados para alocação randômica em blocos e "cega" para o tipo de vacina. Eventos adversos pós-vacinação foram registrados em questionários e diários preenchidos pelos participantes. Enzimas hepáticas foram medidas nos dias 0, 4-20 e 30 do estudo. A viremia foi medida nos dias 4-20. A resposta imune foi verificada em testes sorológicos nos dias 0 e 30. RESULTADOS: Os participantes eram predominantemente homens jovens. A taxa de soroconversão foi superior a 98% no grupo soronegativo antes da vacinação. Comparado ao placebo, a diferença de risco de eventos adversos locais variou de 0,9% a 2,5%, e de 3,5% a 7,4% para eventos adversos sistêmicos nos grupos vacinados. A diferença de risco desses eventos com assistência médica e/ou falta ao trabalho variou de 2,0% a 4,5%. Viremia foi detectada em 3% a 6% dos vacinados até 10 dias após a vacinação. As variações nos níveis de enzimas hepáticas pós-vacinação foram semelhantes nos grupos vacinados e placebo. CONCLUSÕES: Foi demonstrada pela primeira vez a semelhança do perfil de reatogenicidade das vacinas contra FA das cepas 17D e 17DD, comparados entre si e com placebo. As variações das enzimas hepáticas constituem evidência contra o potencial de viscerotropismo do vírus vacinal.


Subject(s)
Randomized Controlled Trials as Topic , Yellow Fever Vaccine/adverse effects , Brazil
7.
Rev. bras. ginecol. obstet ; 27(3): 143-148, mar. 2005. tab
Article in Portuguese | LILACS, BVSAM | ID: lil-405447

ABSTRACT

OBJETIVO: descrever a etiologia, evolução e prevalência de hidropisia fetal em coorte de gestantes em 10 anos de acompanhamento (1992 a 2002), em uma maternidade terciária. MÉTODOS: estudo retrospectivo foi realizado em pacientes referidas para a maternidade do Instituto Fernandes Figueira com o diagnóstico de hidropisia fetal, detectado pelo exame de ultra-sonografia, durante o período compreendido entre 1992 e 2002. Os casos foram selecionados quanto à etiologia (imune ou não-imune), sendo comparados quanto à evolução, procedimentos invasivos realizados e sobrevivência. A análise das variáveis foi realizada por meio do programa Epi-Info 6.0, sendo considerado valor de significância estatística um valor de p<0,05. RESULTADOS: durante o período de estudo, 80 gestantes foram atendidas com diagnóstico inicial de hidropisia fetal. A freqüência de hidropisia nesta população foi de 1 para 157 nascidos vivos. Isoimunização Rh (grupo imune - GI) foi diagnosticada em 13 casos (16,2 por cento), restando portanto 67 casos (83,8 por cento) considerados como devidos a causas não imunes (grupo não imune - GNI). As causas mais comuns de hidropisia fetal não imune são: idiopáticas (40,2 por cento), genéticas (20,8 por cento), infecciosas (20,7 por cento) e cardiopatia fetal (7,4 por cento). Foi encontrada diferença em relação à idade materna do grupo imune (média = 32,8 anos) quando comparada com o grupo não imune (média=28,7) (p=0,03), porém a idade gestacional ao nascimento foi similar em ambos os grupo, (média de 33,6 semanas no grupo imune e de 33,1 semanas no grupo não imune (p=0,66). Amniocentese e transfusão sanguínea in utero foram realizadas com maior freqüência no grupo imune (p<0,001) e a letalidade perinatal encontrada foi de 53,8 por cento no grupo imune e 68,6 por cento no grupo não imune (p=0,47). A pesquisa complementar de anticorpos IgG anti-parvovírus B19 foi realizada em 41 dos 67 casos de hidropisia fetal não imune e somente 16 apresentaram resultado pos...


Subject(s)
Female , Pregnancy , Humans , Incidence , Parvovirus B19, Human , Pregnancy Complications, Infectious , Hydrops Fetalis/etiology , Retrospective Studies , Pregnancy, High-Risk , Rh Isoimmunization , Prognosis
8.
In. Buss, Paulo Marchiori; Temporão, José Gomes; Carvalheiro, José da Rocha. Vacinas, soros & imunizações no Brasil. Rio de Janeiro, Fiocruz, 2005. p.291-303, tab, graf.
Monography in Portuguese | LILACS | ID: lil-422408
9.
Rev. saúde pública ; 38(5): 671-678, out. 2004. tab, graf
Article in English | LILACS | ID: lil-385033

ABSTRACT

OBJETIVO: Comparar a imunogenicidade de três vacinas contra febre amarela ) das subcepas WHO-17D e 17DD brasileira (diferentes lotes-semente). MÉTODOS: Trata-se de ensaio de equivalência envolvendo 1.087 adultos no Rio de Janeiro, RJ. As vacinas foram produzidas em Bio-Manguinhos, Fiocruz (Rio de Janeiro, Brasil) e foram administradas seguindo procedimentos adaptados para randomização em blocos, com tipos de vacinas codificados ("duplo-cego"). Anticorpos neutralizantes contra febre amarela foram dosados antes e depois da vacinação. Definiu-se equivalência como diferença nas taxas de soroconversão não superior a cinco pontos percentuais, e razão de títulos médios geométricos superior (TMG) a 0,67. RESULTADOS: As taxas de soroconversão foram iguais ou maiores do que 98 por cento nos participantes previamente soronegativos. Na coorte completa (incluindo os previamente soropositivos) a soroconversão foi igual ou superior a 90 por cento. As diferenças na soroconversão variaram de -0,05 por cento a -3,02 por cento entre os grupos de comparação. A intensidade da resposta imune também foi semelhante nos grupos: 14,5 UI/mL a 18,6 UI/mL. As razões de TMG variaram de 0,78 a 0,93. Considerando o grupo placebo, as vacinas explicaram 93 por cento da soroconversão. Viremia foi detectada entre os dias três e sete em 2,7 por cento dos participantes vacinados. CONCLUSÕES: A equivalência na imunogenicidade das vacinas contra a febre amarela das subcepas 17D e 17DD foi demonstrada pela primeira vez em ensaio clínico randomizado, duplo-cego, controlado com placebo. O estudo completou o processo de validação clínica do novo lote-semente de vacina, além de ampliar as bases para utilização da vacina brasileira em outros países e de trazer alternativas de subcepas para o produtor da vacina no Brasil.


Subject(s)
Randomized Controlled Trials as Topic , Yellow Fever Vaccine
10.
Mem. Inst. Oswaldo Cruz ; 99(1): 95-99, Feb. 2004. ilus
Article in English | LILACS | ID: lil-356451

ABSTRACT

Erythrovirus B19 infection is usually benign but may have serious consequences in patients with hemolytic anemia (transient aplastic crisis), immunodeficiency (in whom persistent infection can lead to chronic bone marrow failure with anemia), or who are in the first or second trimester of gestation (spontaneous abortion, hydrops fetalis, and fetal death). Being non-enveloped, B19 resists most inactivation methods and can be transmitted by transfusion. B19 is difficult to cultivate and native virus is usually obtained from viremic blood. As specific antibodies may be absent, and there is no reliable immunological method for antigen detection, hybridization or polymerase chain reaction are needed for detecting viremia. A rapid method, gel hemagglutination (Diamed ID-Parvovirus B19 Antigen Test), can disclose highly viremic donations, whose elimination lessens the viral burden in pooled blood products and may even render them non-infectious. In order to obtain native antigen and to determine the frequency of viremic donors, we applied this test to blood donors in a period of high viral activity in our community. Positive or indeterminate results were re-tested by dot-blot hybridization. We tested 472 donors in 1998 and 831 ones in 1999. One viremic donor was found in 1999. We suggest that in periods of high community viral activity the gel hemagglutination test may be useful in avoiding highly viremic blood being added to plasma pools or directly transfused to patients under risk.


Subject(s)
Humans , Male , Female , Antigens, Viral , Blood Donors , Parvoviridae Infections , Parvovirus B19, Human , Viremia , Brazil , Hemagglutination Tests , Hemagglutination, Viral , Viremia
11.
Rev. Soc. Bras. Med. Trop ; 36(2): 299-302, mar.-abr. 2003. graf
Article in English | LILACS | ID: lil-340908

ABSTRACT

Human parvovirus B19 replicates in erythrocyte precursors. Usually, there are no apparent hematological manifestations. However, in individuals with high erythrocyte turnover, as in patients with sickle-cell disease and in the fetus, the infection may lead to severe transient aplasia and hydrops fetalis, respectively. In AIDS patients, persistent infection may result in chronic anemia. By contrast, in HIV-positive patients without AIDS the infection evolves as a mild exanthematous disease. Two clinical descriptions exemplify these forms of presentation. In the first, an AIDS patient presented with bone marrow failure that responded to immunoglobulin. In the second, an HIV-positive patient without AIDS had a morbilliform rash, and needed no treatment. Knowing that an AIDS patient has chronic B19 anemia lessens concern about drug anemia; protects the patient from invasive diagnostic maneuvers; and prevents the patient from disseminating the infection. In AIDS patients with pure red cell aplasia, a search for parvovirus B19 DNA in the serum or in the bone marrow is warranted


Subject(s)
Adult , Humans , Male , Acquired Immunodeficiency Syndrome/complications , Erythema Infectiosum/diagnosis , Chronic Disease , Erythema Infectiosum/complications , Immunocompromised Host
12.
Mem. Inst. Oswaldo Cruz ; 97(7): 965-970, Oct. 2002. tab, graf
Article in English | LILACS | ID: lil-325924

ABSTRACT

This study was designed to analyse the clinical and epidemiological data from human parvovirus B19 cases in a six-year study of rash diseases conduct in an urban area in Brazil (Niterói city area, State of Rio de Janeiro). A total of 673 patients with acute rash diseases were seen at two primary health care units and at a general hospital. A clotted blood sample was collected from all subjects at the time of consultation. Forty-nine per cent (330 cases) of the patients were negative for dengue, rubella and measles IgM or for low avidity IgG to HHV-6. Of these 330, 105 (31.8 percent) were identified as IgM positive to parvovirus B19 by using an antibody capture EIA. During the study period, three distinct peaks of parvovirus infection were detected, suggesting that the disease appears to cycle in approximately 4-5 years. B19 infection was characterized by variable combinations of fever, flu-like symptoms, arthropathy, and gastrointestinal symptoms. Frequency of fever and arthropathy was substantially higher in adults, 75 percent [chi2 (1 D.F.) = 11.39, p = 0.0007] and 62.5 percent [chi2 (1 D.F.) = 29.89, p = 0.0000], respectively. "Slapped-cheek" appearance and reticular or lace-like rash were seen in only 30.1 percent of the children. No adult presented this typical rash. The lack of the typical rash pattern in a large proportion of parvovirus B19 and the similarity of clinical manifestations to other rash diseases, specially to rubella, highlight the difficulty of diagnosing B19 infection on clinical grounds alone


Subject(s)
Humans , Male , Female , Infant, Newborn , Infant , Child, Preschool , Child , Adolescent , Adult , Middle Aged , Exanthema , Immunoglobulin M , Parvoviridae Infections , Parvovirus B19, Human , Brazil , Exanthema , Immunoenzyme Techniques , Parvoviridae Infections , Urban Population
13.
Rev. Inst. Med. Trop. Säo Paulo ; 44(4): 187-190, July-Aug. 2002. tab
Article in English | LILACS | ID: lil-321219

ABSTRACT

The prevalence of anti-human parvovirus B19 IgG antibodies was determined in sera from 165 chronic hemolytic anemia patients, receiving medical care at Instituto Estadual de Hematologia (IEHE), Rio de Janeiro, during the year of 1994. This sample represents around 10 percent of the chronic hemolytic anemia patients attending at IEHE. Most of these patients (140) have sickle cell disease. Anti-B19 IgG antibodies were detected in 32.1 percent of patients. No statistically significant difference (p > 0.05) was seen between IgG antibody prevalence in male (27.8 percent) and female (35.5 percent) patients. Anti-B19 IgG antibodies were more frequent in older (37.6 percent) than younger (28.2 percent) than 20 years old patients, although this difference had no statistical significance (p > 0.05). Anti-B19 IgG antibody prevalence showed that 67.9 percent of patients enrolled in the study were susceptible to B19 acute infection. With the aim to detect acute B19 infection, patients follow up continued until February 1996. During this period four patients presented transient aplastic crisis due to human parvovirus B19 as confirmed by the detection of specific IgM antibodies. All four patients were younger than 20 years old, and 3 were younger than 10 years old. Three of them were sickle cell disease patients. Three of the four acute B19 infection occurred during 1994 springtime


Subject(s)
Humans , Male , Female , Infant , Child, Preschool , Child , Adolescent , Adult , Anemia, Aplastic , Anemia, Hemolytic , Antibodies, Viral , Parvoviridae Infections , Parvovirus B19, Human , Anemia, Aplastic , Anemia, Hemolytic , Brazil , Chronic Disease , Epidemiologic Methods , Immunoglobulin G , Immunoglobulin M , Parvoviridae Infections
14.
Rev. Inst. Med. Trop. Säo Paulo ; 43(3): 167-170, May-June 2001. ilus
Article in English | LILACS | ID: lil-298909

ABSTRACT

We present a case of papular-purpuric "gloves and socks" syndrome (PPGSS) in an adult male with acute parvovirus B19 infection. The patient displayed the classical features of fever, oral lesions, and purpura on hands and feet, but the purpuric lesions on the feet evolved to superficial skin necrosis, a feature not previously described in this syndrome. We believe this is the first reported case of PPGSS occurring in Brazil


Subject(s)
Humans , Male , Middle Aged , Acrodermatitis/virology , Papillomavirus Infections/diagnosis , Parvovirus B19, Human/isolation & purification , Purpura/virology , Acrodermatitis/diagnosis , Acrodermatitis/immunology , DNA, Viral/analysis , Foot Dermatoses/diagnosis , Foot Dermatoses/immunology , Foot Dermatoses/virology , Hand Dermatoses/diagnosis , Hand Dermatoses/immunology , Hand Dermatoses/virology , Immunoglobulin G/blood , Immunoglobulin M/blood , Papillomavirus Infections/immunology , Purpura/diagnosis , Purpura/immunology , Syndrome
15.
Mem. Inst. Oswaldo Cruz ; 96(4): 507-513, May 2001. ilus, tab, graf
Article in English | LILACS | ID: lil-285557

ABSTRACT

Acute human parvovirus B19 infection is followed by an antibody response to the structural proteins of the viral capsid (VP1 and VP2). We used 80 sera collected from 58 erythema infectiosum and 6 transient aplastic crisis patients to test IgM and IgG antibodies against these two proteins in an immunofluorescence assay (IFA) using Sf9 cells infected with recombinant baculovirus expressing either VP1 or VP2 antigen. Although less sensitive than IgM capture enzyme immunoassay using native antigen (MACEIA), we could detect anti-VP1 or anti-VP2 IgM antibodies by IFA in 49 patients with acute infection (76.6 percent). Detection of IgG anti-VP1 and anti-VP2 by IFA, however, was as sensitive as IgG detection by indirect enzyme immunoassay. By applying IgG avidity IFA to sera of the 15 IgM IFA negative patients we were able to confirm acute infection in further 12 cases by IFA. Overall, acute infection was confirmed by IFA in 61 (95.3 percent) of the 64 patients


Subject(s)
Humans , Child , Adolescent , Adult , Antibodies, Viral/isolation & purification , Capsid/immunology , Parvoviridae Infections/immunology , Parvovirus B19, Human/isolation & purification , Antibodies, Viral/blood , Antibody Affinity/immunology , Capsid/blood , Erythema Infectiosum/diagnosis , Erythema Infectiosum/immunology , Fluorescent Antibody Technique , Immunoglobulin G/blood , Immunoglobulin G/immunology , Immunoglobulin M/blood , Immunoglobulin M/immunology , Parvoviridae Infections/diagnosis
16.
Bol. méd. Hosp. Infant. Méx ; 58(2): 90-96, feb. 2001. graf
Article in Spanish | LILACS | ID: lil-306661

ABSTRACT

Introducción. El eritema infeccioso o quinta enfermedad es uno de los exantemas pediátricos más frecuentes. El parvovirus B-19 es el agente infeccioso causal. Se describen las características epidemiológicas y clínicas de niños con datos compatibles y confirmación serológica por 2 métodos.Material y métodos. Durante un año calendario se estudiaron en forma prospectiva pacientes pediátricos con exantema reticulariforme o "en encaje". Se recabaron datos epidemiológicos, clínicos y dermatológicos protocolizados previamente. Se tomó una muestra sanguínea para su estudio en la fase aguda de la enfermedad. A dichas muestras se les analizó con la técnica de inmunofluorescencia indirecta con anticuerpos marcados (IgM IFA Biotrin©) y confirmados por el método de ELISA de captura (MACEIA-FIOCRUZ). Todos los pacientes aquí analizados presentaron ambos resultados positivos.Resultados. La edad media de los 28 pacientes fue de 8.03 años (2 a 13 años ). El 60.7 por ciento (17) de los casos fueron mujeres. La estación predominante fue la primavera. La distribución del exantema fue universal en 64.2 por ciento (18) y cefalocaudal en 78.5 por ciento (22). Los datos sistémicos fueron escasos, a excepción de la presencia de prurito y adenopatías en la mayoría de la muestra.Conclusiones. Los datos clínicos y epidemiológicos del eritema infeccioso de este estudio fue semejante al de otras latitudes.


Subject(s)
Humans , Male , Female , Infant , Child, Preschool , Adolescent , Argentina , Erythema Infectiosum , Serologic Tests , Parvovirus B19, Human , Exanthema
17.
Braz. j. infect. dis ; 5(1): 37-39, Feb. 2001.
Article in English | LILACS | ID: lil-339419

ABSTRACT

Human parvovirus B19 infection can cause erythema infectiosum (EI) and several other clinical presentations. Central nervous system (CNS) involvement is rare, and only a few reports of encephalitis and aseptic meningitis have been published. Here, we describe 2 cases of B19 infection in a family presenting different clinical features. A 30 years old female with a 7-day history of headache, malaise, myalgias, joint pains, and rash was seen. Physical examination revealed a maculopapular rash on the patient's body, and arthritis of the hands. She completely recovered in 1 week. Two days before, her 6 year old son had been admitted to a clinic with a 1-day history of fever, headache, abdominal pain and vomiting. On admission, he was alert, and physical examination revealed neck stiffness, Kerning and Brudzinski signs, and a petechial rash on his trunk and extremities. Cerebrospinal fluid analysis was normal. He completely recovered in 5 days. Acute and convalescent sera of both patients were positive for specific IgM antibody to B19. Human parvovirus B19 should be considered in the differential diagnosis of aseptic meningitis, particularly during outbreaks of erythema infectiosum. The disease may mimic meningococcemia and bacterial meningitis.


Subject(s)
Humans , Male , Female , Child , Adult , Anti-Bacterial Agents/therapeutic use , Headache/drug therapy , Erythema Infectiosum , Meningitis, Aseptic/diagnosis , Meningitis, Aseptic/drug therapy , Parvovirus B19, Human , Purpura
18.
Article in Portuguese | LILACS | ID: lil-306227

ABSTRACT

A descoberta acidental do parvovírus humano B19 em 1974 levou ao esclarecimento da etiologia de algumas síndromes clínicas já desde há muito desconhecidas, e hoje comprovadamente associadas à infecçäo por este vírus. Com base na revisäo da literatura, säo descritas estas síndromes, bem como os eventos que permitiram associá-las ao parvovírus B19, na ordem aproximada em que ocorreram. A literatura brasileira foi também revista. O texto aborda também a infecçäo por pavovírus B19 no contexto de Aids e de outras formas de imunodepressäo


Subject(s)
Humans , Male , Female , Adult , Anemia, Sickle Cell , Erythema Infectiosum , Hydrops Fetalis , Parvovirus B19, Human , Acquired Immunodeficiency Syndrome/complications , Sexually Transmitted Diseases
19.
Rev. Soc. Bras. Med. Trop ; 33(5): 477-81, set.-out. 2000. graf
Article in English, Portuguese | LILACS | ID: lil-270551

ABSTRACT

Descreve-se um caso de crise aplástica devida ao parvovírus B19 num paciente adulto, manifestando-se por palidez, cansaço, lipotímias e dispnéia. A ausência de reticulócitos chamou a atençäo para o diagnóstico. Detectaram-se IgM e IgG anti-B19. Reticulocitopenia em pacientes com anemia hemolítica hereditária sugere infecçäo por B19


Subject(s)
Humans , Male , Adult , Anemia, Aplastic/etiology , Anemia, Sickle Cell/blood , Parvoviridae Infections/complications , Parvovirus B19, Human , Erythrocyte Indices , Hematocrit , Platelet Count , Reticulocyte Count
20.
Rev. Inst. Med. Trop. Säo Paulo ; 40(6): 337-42, Nov.-Dec. 1998. ilus, tab
Article in English | LILACS | ID: lil-228033

ABSTRACT

Os enterovirus foram investigados em secrecoes respiratorias coletadas de pacientes com infeccao respiratoria aguda (IRA), durante um periodo de sete anos (1985-1991), dentro de um estudo longitudinal da etiologia das IRAs. Neste estudo foram encontrados todos os virus que sao mais comumente associados com IRA. Entre os virus isolados, os enterovirus foram apenas menos frequentes que virus respiratorio sincicial, adenovirus e influenzavirus. Quarenta e cinco amostras de enterovirus foram isoladas de pacientes com infeccao do trato respiratorio superior ou inferior. Entre estes enterovirus isolados, trinta e uma amostras foram identificadas como poliovirus (n=18) e enterovirus nao polio (n=13) pelo teste de soroneutralizacao. As amostras de poliovirus isoladas foram classificadas como amostras vacinais do tipo 1 e 2. Dos treze enterovirus nao polio, doze foram identificados como echovirus sorotipos 1, 2, 7, 11, 19 e 31 e apenas um foi identificado como coxsackievirus B4


Subject(s)
Humans , Child , Child, Preschool , Enterovirus/isolation & purification , Enterovirus Infections/etiology , Respiratory Tract Infections/epidemiology , Acute Disease , Brazil , Longitudinal Studies , Population Characteristics , Socioeconomic Factors , Tropical Climate/adverse effects , Urban Area
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