Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 4 de 4
Filter
1.
Rev. Inst. Med. Trop. Säo Paulo ; 46(2): 93-96, Mar.-Apr. 2004. ilus, tab, graf
Article in English | LILACS | ID: lil-358068

ABSTRACT

Os astrovírus humanos têm sido identificados como importantes agentes de diarréias em crianças embora o impacto da sua infecção não tenha sido esclarecido. Este estudo não só mostra os resultados das características epidemiológicas e clínicas, mas também o impacto da infecção por astrovírus em pacientes ambulatoriais de um Hospital Público da cidade de Córdoba na Argentina. Escolheram-se randomicamente 97 pacientes ambulatoriais com menos de 36 meses, entre fevereiro de 2001 e janeiro de 2002, que consultaram por diarréia. Pesquisou-se antígeno de astrovírus por ensaio imuno-enzimático em uma única amostra de fezes por paciente estudado. Determinou-se a presença de astrovírus em 12,37 por cento dos casos de diarréia. Todos os casos positivos foram em crianças de 4 a 18 meses, mas o índice mais elevado se apresentou em crianças de 4 a 6 meses (23,80 por cento). Os sintomas de diarréia associada a astrovírus foram febre 41,66 por cento; vômitos 25,00 por cento e desidratação 8,33 por cento; ou seja, 16,66 por cento dos pacientes precisaram hospitalização. A presença de astrovírus foi anual sem se observar comportamento sazonal, semestre frio 15,21 por cento versus semestre quente 9,80 por cento p > 0,05. Em nossa pesquisa, uma de cada 74 crianças seria atendida anualmente por apresentar um episódio de diarréia associada a astrovírus no hospital público e um de cada 8 casos de diarréia poderia atribuir-se à infecção por astrovírus. Astrovírus é uma infecção sintomática em pacientes pediátricos ambulatoriais, representando 12,37 por cento da morbidade por diarréia.


Subject(s)
Infant, Newborn , Infant , Child, Preschool , Humans , Male , Female , Astroviridae Infections , Diarrhea , Mamastrovirus , Age Distribution , Argentina , Astroviridae Infections , Cohort Studies , Diarrhea , Diarrhea, Infantile , Feces , Hospitals, Public , Immunoenzyme Techniques , Prevalence , Seasons
2.
Medicina (B.Aires) ; 62(1): 9-12, 2002. tab, graf
Article in Spanish | LILACS | ID: lil-314490

ABSTRACT

The aim of this paper was to assess the prevalence of antibodies to HHV-6 in the general population and study the virus circulation among individuals with cancer, in order to analyze HHV-6 involvement in lymphoproliferative disorders. A total of 200 sera from the general population and 67 from patients with neoplasia were studied. The latter were divided in 3 groups: lymphoma/myeloma, leukemia and non-immune solid tumors. HHV-6 antibodies (IgG and IgM) were assayed by IFA and viral genomes were detected using nested PCR. The prevalence of the infection in the healthy population was 63.5 percent with a titer geometric mean (TGM) of 48.67 +/- 1.23. A control group was obtained by systematic sampling of the healthy population. Among the patients with neoplasia, the prevalence was 95.5 percent. In the lymphoma/myeloma group, TGM was 268.73 +/- 1.62; in the leukemia group it was 151.1 +/- 1.88 and in the non-immunogenic solid tumors group it was 95.67 +/- 1.57. Statistically significant differences were observed (p < 0.01) between the control group and the lymphoma/myeloma and leukemia groups. Serum IgM or free viral genomes were not detected in any serum sample. The antibody prevalence found in the general population documents the high circulation of this lymphotropic virus which could indirectly contribute to the pathogenesis of the lymphoproliferative disorder.


Subject(s)
Humans , Adolescent , Adult , Middle Aged , Antibodies, Viral , DNA, Viral , Herpesviridae Infections , Herpesvirus 6, Human , Neoplasms , Argentina , Case-Control Studies , Herpesviridae Infections , Herpesvirus 6, Human , Immunoglobulin G , Immunoglobulin M , Neoplasms , Polymerase Chain Reaction , Prevalence , Seroepidemiologic Studies
3.
Rev. Inst. Med. Trop. Säo Paulo ; 43(4): 193-197, Aug. 2001. tab
Article in English | LILACS | ID: lil-298681

ABSTRACT

Information concerning the disease burden of viral gastroenteritis has important implications for the use and monitoring the impact of public health policies. The present study, carried out in Córdoba city, Argentina, documents the epidemiology of severe viral diarrhea as well as the burden of viral gastrointestinal disease in the hospital children admission. A total of 133 stools were collected from hospitalized children (Town Childhood Hospital) suffering from acute diarrhea and studied for the presence of Group A rotavirus, astrovirus and adenovirus 40/41 by enzyme-immuno assay, between November 1997 and October 1998. Enteric viruses accounted for 42.1 percent of the total diarrheal cases analyzed. Group A rotaviruses, astroviruses, adenoviruses 40/41 and mixed infections were found in 35.3, 4.5, 1.5, and 0.8 percent studied specimens respectively. We estimated that 1 in 27 children in the 0-35 month-old cohort/range would be annually hospitalized for a viral gastroenteritis illness. The major impact on viral diarrhea lies on rotaviral infection, accouting for 84.0 percent of the viral diarrheal cases analyzed and for approximately one third of severe diarrheas requiring hospital admission in Córdoba City, Argentina


Subject(s)
Humans , Male , Female , Infant , Child, Preschool , Diarrhea/virology , Gastroenteritis/epidemiology , Acute Disease , Adenovirus Infections, Human/epidemiology , Argentina/epidemiology , Gastroenteritis/virology , Hospitalization , Immunoenzyme Techniques , Astroviridae Infections/epidemiology , Rotavirus Infections/epidemiology , Seasons , Severity of Illness Index
4.
Medicina (B.Aires) ; 61(2): 179--182, 2001. tab
Article in Spanish | LILACS | ID: lil-286344

ABSTRACT

El objetivo del presente estudio fue documentar la frequencia de agentes virales clásicos y emergentes y su asociación etiológica con el síndrome diarreico en pacientes transplantados renales en Córdoba, Argentina. Se estudiaron 42 muestras fecales de individuos transplantados renales, internados y ambulatórios, con o sin diarrea, todas obtenidas después del transplante. Los pacientes se encontraban bajo triple terapia inmunosupresora con esteroides, azatioprina y ciclosporina ó tacrolimus. Los resultados obtenidos revelaron la presencia de ratovirus grupo A y picobirnavirus en tres de nueve pacientes con síndrome diarreico severo (33.33 porciento), en ausencia de otros patógenos bacterianos entéricos. La presencia de estos agentes virales se correlacionó con niveles elevados de ciclosporina en sangue (> 290 ng/ml) o bien con un tratamiento inmunosupresor prolongado. En contraste, no se detectó ningún virus en la etiología de cuadros diarreicos severos en pacientes transplantados renales.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Diarrhea/virology , Kidney Transplantation , Rotavirus Infections/complications , Argentina/epidemiology , Gastroenteritis/virology , Picobirnavirus , Rotavirus , Rotavirus Infections/epidemiology
SELECTION OF CITATIONS
SEARCH DETAIL