RESUMO
Hepatitis E virus (HEV) infection is a common cause of acute viral hepatitis in tropical regions. In Brazil, HEV G3 is the only genotype detected to date. Reports on HEV prevalence are heterogeneous. We aimed to compare the prevalence of anti-HEV among three populations living in the Brazilian Amazon basin. Two cross-sectional studies were conducted in urban, rural, and Yanomami indigenous areas. Plasma samples from 428 indigenous and 383 non-indigenous subjects were tested for anti-HEV IgG using enzyme-linked immunosorbent assays. The overall prevalence of anti-HEV was 6.8% (95%CI: 5.25-8.72), with 2.8% (12/428) found in the Yanomami areas, 3% (3/101) in an urban area, and 14.2% (40/282) in a rural area. Multivariate logistic analysis indicated that patients aged 31-45 years or ≥46 years are more likely to present anti-HEV positivity, with a respective aOR of 2.76 (95%CI: 1.09-7.5) and 4.27 (95%CI: 1.58-12.35). Furthermore, residence in a rural area (aOR: 7.67; 95%CI: 2.50-33.67) represents a relevant risk factor for HEV infection. Additional studies detecting HEV RNA in fecal samples from both humans and potential animal reservoirs are necessary to comprehensively identify risk factors associated with HEV exposure.
RESUMO
Hepatitis E virus (HEV) is a public health concern globally, causing acute viral hepatitis in humans. Genotype-3 HEV (HEV-3), the most frequently genotype detected in South America, is zoonotic and the main reservoirs are the domestic pig and wild boar. Circulation of HEV-3 in Argentina has been confirmed in humans as well as in pig herds, wild boar and environmental waters. However, data are scarce mainly due to the inaccessibility of serological assays in this country. In order to provide insights in the epidemiology of HEV in swine in Argentina, we developed an indirect ELISA based on the native recombinant protein ORF2 and conducted a serological survey to determine the prevalence of seropositive swine in small-scale pig farms in the central region of Argentina. The method was evaluated in a panel of 157 serum samples, resulting in relative sensitivity of 98.6 % (95 % CI 95 %-100 %) and relative specificity of 97.7 % (95 % CI 94 %-100 %) compared to a commercial test. An almost perfect agreement was obtained between the two tests (Kappa index of 0.961). A survey on 294 samples from 49 small-scale farms resulted in a seropositivity rate of 54 %. Seropositive animals were found in 34 out of 49 (69.4 %) farms. Most of the farms (70.6 %) had over 50 % of seropositive animals. The wide spreading of HEV in the swine population of Tandil, Argentina, underscore the need to better understand the epidemiology of HEV in the region, enabling the implementation of targeted interventions to mitigate the impact of this virus on public health.
Assuntos
Vírus da Hepatite E , Hepatite E , Doenças dos Suínos , Humanos , Suínos , Animais , Hepatite E/epidemiologia , Hepatite E/veterinária , Argentina/epidemiologia , Doenças dos Suínos/epidemiologia , Filogenia , Sus scrofa , Vírus da Hepatite E/genética , Ensaio de Imunoadsorção Enzimática/veterinária , RNA Viral/genéticaRESUMO
Background: Hepatitis E virus (HEV) infection is a common cause of acute clinical hepatitis worldwide and is emerging as a disease in Argentina. It is primarily transmitted through contaminated water and food, following the fecal-oral route. Furthermore, is a zoonotic disease with swine as the primary reservoir. Prevalence of HEV infection in humans in several regions of Argentina remains unknown. Objectives: (i) Determine the seroprevalence of HEV among the human population in Tandil, Buenos Aires, Argentina; (ii) Evaluate its association with demographic, socioeconomic and other risk exposures variables, and (iii) Describe and analyze spatial patterns related to HEV infection. Methods: From August 2020 to July 2021, serum samples were collected from 969 individuals aged 1-80 years. Seroprevalence and 95% Confidence Interval was determined. To assess the factors associated with the presence of anti-HEV antibodies, associations between the variables and seropositivity were evaluated through bivariate and multivariate analysis. Spatial scanning for clusters of positivity was carried out. Factors associated with these clusters were also assessed. Results: Anti-HEV antibodies were detected in 4.64% (IC 95% 3.27-6.02) of samples. Dark urine was associated with seropositivity (p = 0.02). Seropositivity was linked with the presence of natural water courses near their households (p = 0.02); the age (p = 0.04); and previous travel to Europe (p = 0.04). A spatial cluster of low rates of HEV seropositivity was detected, with greater distance of the households to water courses associated to the cluster, and male sex inversely associated to it. Discussion and conclusion: This study is the first study to investigate the prevalence of HEV in the population from Tandil, Buenos Aires, Argentina. Considering HEV infection in the differential diagnosis in individuals presenting acute hepatitis is highlighted. The incorporation of HEV testing into blood screening policies should be mandatory. Factors related to the infection and spatial patterns of high and low risk were determined, and should be considered when implementing specific preventive measures.
Assuntos
Vírus da Hepatite E , Hepatite E , Humanos , Masculino , Suínos , Animais , Argentina/epidemiologia , Estudos Soroepidemiológicos , Hepatite E/epidemiologia , Hepatite E/diagnóstico , Anticorpos Anti-Hepatite , Fatores de Risco , ÁguaRESUMO
Resumen El virus de la hepatitis E (VHE) es uno de los principales agentes etiológicos de hepatitis entérica en el mundo. En países en vía de desarrollo, la seroprevalencia oscila entre 20 y 50% y en países desarrollados entre 4,4 y 21%. Clínicamente los casos de infección por VHE en individuos inmunocompetentes cursan como una hepatitis viral aguda auto limitada; por el contrario, en mujeres embarazadas, individuos receptores de trasplantes de órganos e individuos que conviven con el virus de la inmunodeficiencia humana (VIH), la infección puede manifestarse como una hepatitis crónica y grave. En América Latina, sólo Brasil y Argentina reportan cifras en individuos que conviven con el VIH. Se requieren más estudios en nuestra región que permitan determinar la prevalencia del VHE en individuos inmunosuprimidos, donantes de sangre y población general para adoptar medidas que garanticen un diagnóstico oportuno, acceso a la atención y el control de la transmisión.
Abstract The hepatitis E virus (HEV) is one of the main etiological agents of enteric hepatitis in the world. In developing countries its sero-prevalence ranges from 20 to 50% and in developed countries from 4.4% to 21%. Clinically, cases of HEV infection in immunocompetent individuals present as self-limited acute viral hepatitis; conversely, in pregnant women, transplanted individuals, and individuals living with the human immunodeficiency virus (HIV), the infection can manifest as chronic and severe hepatitis. In Latin America, only Brazil and Argentina report figures for individuals living with HIV. More studies are required in our region to determine the prevalence of HEV in immunosuppressed individuals, blood donors, and the general population to adopt measures that guarantee timely diagnosis, access to care, and control of transmission.
RESUMO
Hepatitis E virus (HEV) infection is one of the major public health problems in developing countries. HEV can cause chronic infections in immunocompromised individuals e.g. thalassemic patients with increased risk of morbidity and mortality. In addition there is possibility of HEV transmission through blood transfusion. Therefore, the present study aimed to investigate the seroprevalence and risk factors of HEV infection in ß-thalassemic children. METHODS: This cross-sectional study was conducted on 140 Egyptian children suffering from ß-thalassemia, attending the hematology outpatient clinic from April to October 2016. Serum samples from patients were collected and anti-HEV antibodies; Immunoglobulin G (IgG) and Immunoglobulin M (IgM) were measured by enzyme-linked immunosorbent assay (ELISA). RESULTS: The seroprevalence of HEV in ß-thalassemic chidren was relatively high (27.15%). Anti-HEV IgG prevalence was 24.29% while that of IgM was 2.86%. There was significant association between HEV infection and age, residence, liver enzymes and amount of blood transfusion per year. CONCLUSIONS: Thalasemic patients are vulnerable to chronicity and increased risk of morbidity and mortality from HEV infection. Frequent assessment of liver enzymes in thalassemic patients to monitor subclinical HEV is recommended. Close monitoring and HEV screening of blood donations should be taken in consideration. Public awareness about HEV endemicity, modes of transmission, and risk hazards especially in high risk group should be done to reduce the disease burden.
Assuntos
Transfusão de Sangue , Hepatite E/epidemiologia , Hepatite E/transmissão , Talassemia beta/epidemiologia , Talassemia beta/virologia , Adolescente , Distribuição por Idade , Criança , Pré-Escolar , Estudos Transversais , Egito/epidemiologia , Ensaio de Imunoadsorção Enzimática , Feminino , Anticorpos Anti-Hepatite B/sangue , Humanos , Imunocompetência , Masculino , Análise Multivariada , Prevalência , Fatores de Risco , Estudos Soroepidemiológicos , Distribuição por SexoRESUMO
ABSTRACT Hepatitis E virus (HEV) infection is one of the major public health problems in developing countries. HEV can cause chronic infections in immunocompromised individuals e.g. thalassemic patients with increased risk of morbidity and mortality. In addition there is possibility of HEV transmission through blood transfusion. Therefore, the present study aimed to investigate the seroprevalence and risk factors of HEV infection in β-thalassemic children. Methods: This cross-sectional study was conducted on 140 Egyptian children suffering from β-thalassemia, attending the hematology outpatient clinic from April to October 2016. Serum samples from patients were collected and anti-HEV antibodies; Immunoglobulin G (IgG) and Immunoglobulin M (IgM)were measured by enzyme-linked immunosorbent assay (ELISA). Results: The seroprevalence of HEV in β-thalassemic chidren was relatively high (27.15%). Anti-HEV IgG prevalence was 24.29% while that of IgM was 2.86%. There was significant association between HEV infection and age, residence, liver enzymes and amount of blood transfusion per year. Conclusions: Thalasemic patients are vulnerable to chronicity and increased risk of morbidity and mortality from HEV infection. Frequent assessment of liver enzymes in thalassemic patients to monitor subclinical HEV is recommended. Close monitoring and HEV screening of blood donations should be taken in consideration. Public awareness about HEV endemicity, modes of transmission, and risk hazards especially in high risk group should be done to reduce the disease burden.
Assuntos
Humanos , Masculino , Feminino , Pré-Escolar , Criança , Adolescente , Transfusão de Sangue , Hepatite E/transmissão , Hepatite E/epidemiologia , Talassemia beta/epidemiologia , Talassemia beta/virologia , Ensaio de Imunoadsorção Enzimática , Estudos Soroepidemiológicos , Prevalência , Estudos Transversais , Análise Multivariada , Fatores de Risco , Distribuição por Sexo , Distribuição por Idade , Egito/epidemiologia , Anticorpos Anti-Hepatite B/sangue , ImunocompetênciaRESUMO
Hepatitis-associated aplastic anemia (HAAA) is a well-recognized clinical syndrome in which marrow failure follows the development of hepatitis; it can be observed in up to 5% in the aplastic anemia in West Europe and North American countries and 10% in the East Asia. Although hepatotropic and other viruses were suspected of causing HAAA, this hypothesis was rarely confirmed. Currently, the infection with hepatitis E virus represents the first cause of acute hepatitis in the world. Its genotype 3, the most frequent in Argentina and other Latin American countries, was associated with extrahepatic complications (renal, pancreatic, neurologic and hematologic). To our knowledge, only one case of hepatitis E virus-associated aplastic anemia has been previously reported, in Pakistan; the case presented here would be the first in Argentina. The patient was treated with thymoglobulin, cyclosporine, corticosteroids, filgastrim and transfusional support. She developed fungemia due to Candida tropicalis that remitted with equinocandins and therefore fever, pulmonary infiltrates and a solitary nodular cerebral image with serum galactomannan (DO index > 1.0 ng/ml) that resolved with voriconazol. She was discharged three months after her admission without transfusion requirements and normal hepatic values.With this in mind, it would be advisable to investigate hepatitis E (HEV) as a cause of HAAA in Argentina.
Assuntos
Anemia Aplástica/complicações , Hepatite E/complicações , Anemia Aplástica/diagnóstico , Feminino , Humanos , Pessoa de Meia-IdadeRESUMO
La aplasia medular asociada a hepatitis (HAAA) es una reconocida entidad clínica donde la falla medular es precedida de una hepatitis; se observa hasta en el 5% de las aplasias en Europa occidental y América del Norte y hasta en el 10% de ellas en el Este asiático. Se ha sospechado de los virus hepatotropos y otros virus como responsables de HAAA, pero esta asociación raramente se ha confirmado. La hepatitis por virus E es la causa más frecuente de hepatitis viral en el mundo. Su genotipo 3, de mayor circulación en la Argentina y otros países de Latinoamérica, puede presentar complicaciones extrahepáticas (renales, neurológicas, pancreáticas y hematológicas). Hasta aquí, en nuestro conocimiento solo se ha publicado un caso de HAAA por virus de la hepatitis E en Pakistán; el que ahora presentamos sería el primero comunicado en la Argentina. La paciente fue tratada con timoglobulina, ciclosporina, corticosteroides, filgastrim y soporte transfusional. Desarrolló fungemia por Candida tropicalis que respondió a equinocandinas, y luego infiltrados pulmonares e imagen nodular cerebral con galactomananos en suero (índice DO > 1.0 ng/ml) que resolvieron con voriconazol. Fue dada de alta independiente de transfusiones, tres meses después de su admisión, con hepatograma normal. Teniendo en cuenta este caso, sería conveniente investigar la hepatitis E como causa de HAAA en la Argentina.
Hepatitis-associated aplastic anemia (HAAA) is a well-recognized clinical syndrome in which marrow failure follows the development of hepatitis; it can be observed in up to 5% in the aplastic anemia in West Europe and North American countries and 10% in the East Asia. Although hepatotropic and other viruses were suspected of causing HAAA, this hypothesis was rarely confirmed. Currently, the infection with hepatitis E virus represents the first cause of acute hepatitis in the world. Its genotype 3, the most frequent in Argentina and other Latin American countries, was associated with extrahepatic complications (renal, pancreatic, neurologic and hematologic). To our knowledge, only one case of hepatitis E virus-associated aplastic anemia has been previously reported, in Pakistan; the case presented here would be the first in Argentina. The patient was treated with thymoglobulin, cyclosporine, corticosteroids, filgastrim and transfusional support. She developed fungemia due to Candida tropicalis that remitted with equinocandins and therefore fever, pulmonary infiltrates and a solitary nodular cerebral image with serum galactomannan (DO index > 1.0 ng/ml) that resolved with voriconazol. She was discharged three months after her admission without transfusion requirements and normal hepatic values.With this in mind, it would be advisable to investigate hepatitis E (HEV) as a cause of HAAA in Argentina.
Assuntos
Feminino , Humanos , Pessoa de Meia-Idade , Anemia Aplástica/complicações , Hepatite E/complicações , Anemia Aplástica/diagnósticoRESUMO
La aplasia medular asociada a hepatitis (HAAA) es una reconocida entidad clínica donde la falla medular es precedida de una hepatitis; se observa hasta en el 5% de las aplasias en Europa occidental y América del Norte y hasta en el 10% de ellas en el Este asiático. Se ha sospechado de los virus hepatotropos y otros virus como responsables de HAAA, pero esta asociación raramente se ha confirmado. La hepatitis por virus E es la causa más frecuente de hepatitis viral en el mundo. Su genotipo 3, de mayor circulación en la Argentina y otros países de Latinoamérica, puede presentar complicaciones extrahepáticas (renales, neurológicas, pancreáticas y hematológicas). Hasta aquí, en nuestro conocimiento solo se ha publicado un caso de HAAA por virus de la hepatitis E en Pakistán; el que ahora presentamos sería el primero comunicado en la Argentina. La paciente fue tratada con timoglobulina, ciclosporina, corticosteroides, filgastrim y soporte transfusional. Desarrolló fungemia por Candida tropicalis que respondió a equinocandinas, y luego infiltrados pulmonares e imagen nodular cerebral con galactomananos en suero (índice DO > 1.0 ng/ml) que resolvieron con voriconazol. Fue dada de alta independiente de transfusiones, tres meses después de su admisión, con hepatograma normal. Teniendo en cuenta este caso, sería conveniente investigar la hepatitis E como causa de HAAA en la Argentina.(AU)
Hepatitis-associated aplastic anemia (HAAA) is a well-recognized clinical syndrome in which marrow failure follows the development of hepatitis; it can be observed in up to 5% in the aplastic anemia in West Europe and North American countries and 10% in the East Asia. Although hepatotropic and other viruses were suspected of causing HAAA, this hypothesis was rarely confirmed. Currently, the infection with hepatitis E virus represents the first cause of acute hepatitis in the world. Its genotype 3, the most frequent in Argentina and other Latin American countries, was associated with extrahepatic complications (renal, pancreatic, neurologic and hematologic). To our knowledge, only one case of hepatitis E virus-associated aplastic anemia has been previously reported, in Pakistan; the case presented here would be the first in Argentina. The patient was treated with thymoglobulin, cyclosporine, corticosteroids, filgastrim and transfusional support. She developed fungemia due to Candida tropicalis that remitted with equinocandins and therefore fever, pulmonary infiltrates and a solitary nodular cerebral image with serum galactomannan (DO index > 1.0 ng/ml) that resolved with voriconazol. She was discharged three months after her admission without transfusion requirements and normal hepatic values.With this in mind, it would be advisable to investigate hepatitis E (HEV) as a cause of HAAA in Argentina.(AU)