RESUMEN
ABSTRACT Environmental surveillance of water sources is important to monitoring viral hepatitis transmission in clinical settings. This study investigated the circulation of hepatitis A (HAV) and E (HEV) viruses in sewage and clinical samples from Argentina. Between 2016 and 2017, 80 raw sewage samples and 86 clinical samples (stool and serum) from suspected cases of hepatitis A and hepatitis E were obtained. HAV and HEV were tested by both real-time and nested PCR. Positive samples were sequenced for genotype determination and phylogenetic analysis. Overall, HAV was recovered in 39% of sewage samples and 61.1% of clinical samples. HEV was detected in 22.5% of sewage samples and 15.9% of clinical samples. HAV was found more frequently in sewage during the winter and in clinical samples in spring; HEV was more prevalent in sewage during summer and in clinical samples in autumn. All HAV isolates belonged to genotype IA and HEV isolates belonged to genotype 3, the most prevalent genotypes in South America. High prevalence of HAV and HEV in environmental and clinical samples in Mendoza, Argentina was observed. These findings reinforce the importance of environmental surveillance and implementation of health strategies to control the spread of HAV and HEV in developing countries.
RESUMEN
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.
Asunto(s)
Femenino , Humanos , Persona de Mediana Edad , Anemia Aplásica/complicaciones , Hepatitis E/complicaciones , Anemia Aplásica/diagnósticoRESUMEN
In Argentina, the four strategies of epidemiological surveillance from the National System of Health Surveillance (SNVS) are Diseases of Mandatory Report (C2), Sentinel Units (SU), Laboratory Surveillance (SIVILA) and National Programs (National Plan of Blood, information from blood banks). They collect information about viral hepatitis (VH). The objective of this work was to analyze the information recorded by the SUs of VH for hepatitis B and C in the period between January 1th 2007 and December 31h 2010. In this period, out of the 1,769 cases recorded (entered by 21 of 24 SUs), 806 entries were hepatitis B, 848 hepatitis C and 115 belonged to other definitions. The relative proportions between hepatitis B and hepatitis C were heterogeneous between the SUs. The age distribution was homogeneous, being the predominant group in acute hepatitis B the 25- to 34-year-old group. In hepatitis C, the age distribution was broader. The distribution by sex and risk factors was heterogeneous between the different SUs. In hepatitis C, genotype 1 was the predominant one. In conclusion, the information provided by the SUs contributes as an evidence of the public health problem posed by this pathology in our country.