RESUMEN
Acute gastroenteritis (AGE) is a common pediatric infection that remains a significant cause of childhood morbidity and mortality worldwide, especially in low-income regions. Thus, the objective of this study was to detect human adenovirus (HAdV) and non-polio enterovirus (NPEV) in fecal samples from the Gastroenteritis Surveillance Network, and to identify circulating strains by nucleotide sequencing. A total of 801 fecal samples were tested using qPCR/RT-qPCR, and 657 (82.0%) were inoculated into HEp-2C and RD cell lines. The HAdV and NPEV positivity rates obtained using qPCR/RT-qPCR were 31.7% (254/801) and 10.5% (84/801), respectively, with 5.4% (43/801) co-detection. Cytopathic effect was observed in 9.6% (63/657) of patients, 2.7% (18/657) associated with HAdV, and 6.2% (41/657) associated with NPEV after testing by ICC-PCR. A comparison of the two methodologies demonstrated an agreement of 93.5% for EVNP and 64.4% for HAdV. These two viruses were detected throughout the study period, with HAdV positivity rates ranging from 41% in Amapá to 18% in Pará. The NEPV varied from 18% in Pará/Rondônia to 3% in Acre. The most affected age group was over 60 months for both HAdV and NPEV. Samples previously positive for rotavirus and norovirus, which did not show a major difference in the presence or absence of diarrhea, fever, and vomiting, were excluded from the clinical analyses of these two viruses. These viruses circulated over five years, with a few months of absence, mainly during the months corresponding to the waves of SARS-CoV-2 infection in Brazil. Five HAdV species were identified (A, B, C, D, and F), with a greater predominance of HAdV-F41 (56.5%) followed by HAdV-C (15.2%). Three NPEV species (A, B, and C) were detected, with serotypes E14 (19.3%) and CVA-24 (16.1%) being the most prevalent. The present study revealed a high diversity of NPEV and HAdV types circulating in children with AGE symptoms in the northern region of Brazil.
Asunto(s)
Adenovirus Humanos , Enterovirus , Heces , Gastroenteritis , Humanos , Gastroenteritis/virología , Gastroenteritis/epidemiología , Brasil/epidemiología , Heces/virología , Preescolar , Lactante , Adenovirus Humanos/genética , Adenovirus Humanos/aislamiento & purificación , Adenovirus Humanos/clasificación , Masculino , Enterovirus/genética , Enterovirus/aislamiento & purificación , Femenino , Niño , Infecciones por Enterovirus/epidemiología , Infecciones por Enterovirus/virología , Infecciones por Enterovirus/diagnóstico , Enfermedad Aguda , Infecciones por Adenovirus Humanos/epidemiología , Infecciones por Adenovirus Humanos/virología , FilogeniaRESUMEN
Introducción. Los datos de frecuencia de los adenovirus entéricos, sapovirus y astrovirus en casos de gastroenteritis aguda esporádica en Argentina son escasos. Métodos. Diseño descriptivo sobre una selección de muestras de heces de menores de 5 años con diarrea remitidas durante el período 2010-2021, con resultado previo negativo para rotavirus y norovirus. Se estudió la presencia de adenovirus entéricos, sapovirus y astrovirus por métodos moleculares, con posterior genotipificación de las muestras positivas. Resultados. De 574 muestras seleccionadas, en 226 (39,4 %) se identificó al menos uno de los virus estudiados. En particular, se detectaron adenovirus, sapovirus y astrovirus en el 30,7 %, el 5,6 % y el 3,1 %, respectivamente. El adenovirus 41, los sapovirus GI.1 y GI.2, y el astrovirus 1 fueron los más frecuentemente detectados. Se identificaron dos muestras con astrovirus no clásicos. Conclusiones. A pesar de ser menos frecuentes, estos enteropatógenos son responsables de un número considerable de episodios de diarrea esporádica. Por lo tanto, su estudio y vigilancia contribuye significativamente a reducir la brecha de casos no diagnosticados.
Introduction. Data on the frequency of enteric adenoviruses, sapoviruses, and astroviruses in cases of sporadic acute gastroenteritis in Argentina are scarce. Methods. Descriptive design of a selection of fecal samples of children with diarrhea younger than 5 years referred between 2010 and 2021, with a previous negative result for rotavirus and norovirus. The presence of enteric adenovirus, sapovirus, and astrovirus was tested by molecular methods, with subsequent genotyping of positive samples. Results. At least 1 of the tested viruses was detected in 226 (39.4%) of the 574 selected samples. Specifically, adenovirus, sapovirus, and astrovirus were detected in 30.7%, 5.6%, and 3.1% of the samples, respectively. The most frequent viruses detected were adenovirus 41, sapoviruses GI.1 and GI.2, and astrovirus 1. Non-classic astroviruses were detected in 2 samples. Conclusions. Despite being less frequent, these enteropathogens are responsible for a large number of sporadic diarrhea events. Therefore, their study and surveillance contribute significantly to reduce the gap of undiagnosed cases.
Asunto(s)
Humanos , Lactante , Preescolar , Diarrea/epidemiología , Diarrea/virología , Gastroenteritis/epidemiología , Gastroenteritis/virología , Argentina/epidemiología , Astroviridae/aislamiento & purificación , Astroviridae/genética , Sapovirus/aislamiento & purificación , Sapovirus/genética , Heces/virología , GenotipoRESUMEN
Norovirus is an important etiologic agent of acute gastroenteritis and has become even more relevant in Brazil after the implementation of the monovalent rotavirus vaccine in 2006 through the public health system, now representing a significant portion of the etiology of acute diarrheal diseases. Although diagnosing acute gastroenteritis caused by norovirus is a relatively simple process, and the infection tends to be self-limited, the virus can be considerably harmful to vulnerable populations, such as children, the elderly, and immunocompromised individuals. The spread of norovirus is also particularly favorable among such groups due to its mode of transmission, favored by cluttered environments such as in hospitals and densely populated regions. Additionally, norovirus' ability to spread through water and food creates the need for measures to ensure adequate sanitation and the development of effective measures to prevent outbreaks and severe manifestations of the disease. This review aims to address the main reports of human norovirus detected in Brazil over the years, focusing on clinical-hospital, food-related, and urban conglomerate contexts, including the circulating strains.
Asunto(s)
Infecciones por Caliciviridae , Gastroenteritis , Norovirus , Norovirus/genética , Norovirus/aislamiento & purificación , Norovirus/clasificación , Brasil/epidemiología , Humanos , Infecciones por Caliciviridae/epidemiología , Infecciones por Caliciviridae/virología , Gastroenteritis/virología , Gastroenteritis/epidemiología , Brotes de EnfermedadesRESUMEN
Viral gastroenteritis is commonly reported in dogs and involves a great diversity of enteric viruses. In this research, viral diversity was investigated in dogs with diarrhea in Northern Brazil using shotgun metagenomics. Furthermore, the presence of norovirus (NoV) was investigated in 282 stool/rectal swabs of young/adult dogs with or without diarrhea from two public kennels, based on one-step reverse transcription polymerase chain reaction (RT-PCR) for genogroup VI and VII (GVI and GVII) and real-time RT-PCR for GI, GII, and GIV. Thirty-one viral families were identified, including bacteriophages. Phylogenetic analyses showed twelve complete or nearly complete genomes belonging to the species of Protoparvovirus carnivoran1, Mamastrovirus 5, Aichivirus A2, Alphacoronavirus 1, and Chipapillomavirus 1. This is the first description of the intestinal virome of dogs in Northern Brazil and the first detection of canine norovirus GVII in the country. These results are important for helping to understand the viral groups that circulate in the canine population.
Asunto(s)
Enfermedades de los Perros , Gastroenteritis , Filogenia , Perros , Animales , Gastroenteritis/virología , Gastroenteritis/veterinaria , Gastroenteritis/epidemiología , Brasil/epidemiología , Enfermedades de los Perros/virología , Enfermedades de los Perros/epidemiología , Norovirus/genética , Norovirus/clasificación , Norovirus/aislamiento & purificación , Heces/virología , Genoma Viral , Variación Genética , Metagenómica/métodos , Virus/clasificación , Virus/genética , Virus/aislamiento & purificación , ViromaRESUMEN
INTRODUCTION: Diarrheal diseases constitute a significant public health problem in terms of mortality and morbidity. In Honduras and around the world, RVs have consistently emerged as the single most important etiologic agent in acute childhood diarrhea. However, other viruses, such as NoVs and HAstVs, have also been shown to be responsible for viral gastroenteritis. Unfortunately, the country has limited information concerning the etiologic role of these viral agents in acute gastroenteritis. This study investigated the frequency, genotypes, and epidemiological characteristics of RV-A, NoVs, and HAstVs among children under 5 years old in Distrito Central, Honduras. METHODS: Stool samples and their corresponding epidemiological data were collected from children with acute gastroenteritis in three healthcare centers in Distrito Central. All samples were screened by immunoassays for RV-A and HAstVs. RV-A-positive samples were molecularly characterized by RT-PCR and genotyping assays. RT-PCR was also applied to confirm HAstVs positivity and to detect NoVs, followed by nucleotide sequencing to assign their genotypes. RESULTS: Our results show that at least one viral agent was detected in 31% of the children. The frequency of RV-A, NoVs, and HAstVs was 14%, 13%, and 5%, respectively. The most frequent RV-A genotype was G2P[4], occurring in 93% of cases. 92.3% of NoVs-positive samples belonged to genogroup II, with GII.4 and GII.16 being the most common. HAstVs were clustered into three genotypes: HAstV-1, HAstV-2, and HAstV-8. Only one sample showed coinfection with NoVs and HAstVs. CONCLUSION: This comprehensive molecular and epidemiological characterization of enteric viruses demonstrates the vast diversity of these agents and describes for the first time NoVs and HAstVs as causative agents of acute childhood gastroenteritis in Distrito Central, Honduras. This suggests that further in-depth studies of the pediatric population are necessary to develop and implement effective preventive and control measures in the country.
Asunto(s)
Heces , Gastroenteritis , Genotipo , Humanos , Honduras/epidemiología , Gastroenteritis/virología , Gastroenteritis/epidemiología , Preescolar , Lactante , Heces/virología , Masculino , Femenino , Diarrea/virología , Diarrea/epidemiología , Filogenia , Rotavirus/genética , Rotavirus/aislamiento & purificación , Rotavirus/clasificación , ARN Viral/genética , Norovirus/genética , Norovirus/clasificación , Norovirus/aislamiento & purificación , Infecciones por Caliciviridae/epidemiología , Infecciones por Caliciviridae/virología , Enfermedad Aguda/epidemiología , Recién Nacido , Infecciones por Enterovirus/virología , Infecciones por Enterovirus/epidemiologíaRESUMEN
OBJECTIVE: Our objective was to determine the frequency of rotavirus, adenovirus, and rota-adenovirus co-infections and investigate the fecal leukocyte rate associated with these infections in patients with gastroenteritis. METHODS: This is a retrospective study. We identified patients who were admitted to the pediatric emergency department with acute gastroenteritis and had their stool samples tested for rotavirus and/or adenovirus antigens. Among them, we determined the individuals who underwent stool microscopy tests on the same day and recorded their results. RESULTS: A total of 1,577 patients who underwent testing for rotavirus and/or adenovirus antigens in their stool samples were identified. Among these patients, 583 individuals had concurrent fecal microscopy results. The prevalence of solely rotavirus antigen positivity was 16.4%, solely adenovirus antigen positivity was 2.9%, and rota-adenovirus co-infections were detected in 1.8% of the children. The fecal leukocyte rates in children infected with rotavirus, adenovirus, and rota-adenovirus co-infections were 4.8, 13.3, and 88.9%, respectively. CONCLUSION: The presence of fecal leukocytes was detected at a high rate in cases of viral gastroenteritis, especially in rota-adenovirus co-infections. Therefore, clinicians should not consider only bacterial pathogens in the presence of fecal leukocytes.
Asunto(s)
Coinfección , Heces , Gastroenteritis , Infecciones por Rotavirus , Humanos , Gastroenteritis/virología , Gastroenteritis/epidemiología , Estudios Retrospectivos , Heces/virología , Femenino , Masculino , Preescolar , Lactante , Infecciones por Rotavirus/epidemiología , Enfermedad Aguda , Coinfección/epidemiología , Niño , Recuento de Leucocitos , Infecciones por Adenovirus Humanos/epidemiología , Infecciones por Adenoviridae/epidemiología , Leucocitos , Rotavirus/aislamiento & purificación , Rotavirus/inmunología , Adenoviridae/aislamiento & purificaciónRESUMEN
Noroviruses are highly infectious, genetically diverse viruses. Global outbreaks occur frequently, making molecular surveillance important for infection monitoring. This cross-sectional descriptive study aimed to monitor cases of norovirus gastroenteritis in the Brazilian Amazon. Fecal samples were tested by immunoenzymatic assay, RT-PCR and genetic sequencing for the ORF1/ORF2 and protease regions. Bayesian inference with a molecular clock was employed to construct the phylogeny. The norovirus prevalence was 25.8%, with a higher positivity rate among children aged 0-24 months. Genogroup GII accounted for 98.1% of the sequenced samples, while GI accounted for 1.9% of them. The GII.P16/GII.4 genotype was the most prevalent, with an evolution rate of 2.87x10-3 and TMRCA estimated in 2012. This study demonstrates that norovirus is a primary causative agent of gastroenteritis and provides data on viral genetic diversity that may facilitate infection surveillance and vaccine development.
Asunto(s)
Infecciones por Caliciviridae , Heces , Gastroenteritis , Genotipo , Norovirus , Filogenia , Norovirus/genética , Norovirus/clasificación , Brasil/epidemiología , Humanos , Infecciones por Caliciviridae/epidemiología , Infecciones por Caliciviridae/virología , Lactante , Gastroenteritis/virología , Gastroenteritis/epidemiología , Preescolar , Estudios Transversales , Heces/virología , Recién Nacido , Niño , Femenino , Masculino , Adolescente , Adulto , ARN Viral/genética , Prevalencia , Adulto Joven , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , Persona de Mediana Edad , Anciano , Variación GenéticaRESUMEN
INTRODUCTION: The multifactorial etiology of gastroenteritis emphasizes the need for different laboratory methods to identify or exclude infectious agents and evaluate the severity of diarrheal disease. OBJECTIVE: To diagnose the infectious etiology in diarrheic children and to evaluate some fecal markers associated with intestinal integrity. MATERIALS AND METHODS: The study group comprised 45 children with diarrheal disease, tested for enteropathogens and malabsorption markers, and 76 children whose feces were used for fat evaluation by the traditional and acid steatocrit tests. RESULTS: We observed acute diarrhea in 80% of the children and persistent diarrhea in 20%. Of the diarrheic individuals analyzed, 40% were positive for enteropathogens, with rotavirus (13.3%) and Giardia duodenalis (11.1%) the most frequently diagnosed. Among the infected patients, occult blood was more evident in those carrying pathogenic bacteria (40%) and enteroviruses (40%), while steatorrhea was observed in infections by the protozoa G. duodenalis (35.7%). Children with diarrhea excreted significantly more lipids in feces than non-diarrheic children, as determined by the traditional (p<0.0003) and acid steatocrit (p<0.0001) methods. Moreover, the acid steatocrit method detected 16.7% more fecal fat than the traditional method. CONCLUSIONS: Childhood diarrhea can lead to increasingly severe nutrient deficiencies. Steatorrhea is the hallmark of malabsorption, and a stool test, such as the acid steatocrit, can be routinely used as a laboratory tool for the semi-quantitative evaluation of fat malabsorption in diarrheic children.
Introducción. La etiología multifactorial de la gastroenteritis enfatiza la necesidad de usar diferentes métodos de laboratorio para identificar o excluir agentes infecciosos y evaluar la gravedad de la enfermedad diarreica. Objetivo. Diagnosticar la etiología infecciosa de la diarrea en niños y evaluar algunos marcadores fecales asociados con la integridad intestinal. Materiales y métodos. Se estudiaron 45 niños con enfermedad diarreica, en los cuales se evaluaron la presencia de enteropatógenos y los marcadores de malabsorción. Se analizaron las muestras fecales de 76 niños, mediante las pruebas de esteatocrito tradicional y esteatocrito ácido, para la cuantificación de la grasa. Resultados. Se observó diarrea aguda en el 80 % de los niños y diarrea persistente en el 20 %. De los individuos con diarrea, el 40 % fue positivo para enteropatógenos; los más diagnosticados fueron rotavirus (13,3 %) y Giardia duodenalis (11,1 %). Entre los pacientes infectados, la sangre oculta fue más evidente en aquellos portadores de bacterias patógenas (40 %) o enterovirus (40%), mientras que la esteatorrea se observó en infecciones por el protozoo G. duodenalis (35,7 %). Los niños con diarrea excretaron significativamente más lípidos en las heces que aquellos sin diarrea, según lo determinado por los métodos de esteatocrito tradicional (p<0,0003) y esteatocrito ácido (p<0,0001). Conclusiones. La diarrea infantil puede provocar deficiencias graves de nutrientes. La esteatorrea es distintiva de la malabsorción intestinal y puede detectarse mediante la estimación del esteatocrito ácido. Esta prueba podría utilizarse de forma rutinaria como una herramienta de laboratorio para la evaluación semicuantitativa de la malabsorción de grasas en niños con diarrea.
Asunto(s)
Diarrea , Heces , Síndromes de Malabsorción , Humanos , Diarrea/parasitología , Diarrea/etiología , Diarrea/microbiología , Heces/parasitología , Preescolar , Lactante , Síndromes de Malabsorción/complicaciones , Síndromes de Malabsorción/etiología , Masculino , Femenino , Niño , Giardiasis/complicaciones , Esteatorrea/etiología , Gastroenteritis/complicaciones , Gastroenteritis/parasitología , Gastroenteritis/microbiología , Sangre OcultaRESUMEN
Introduction. Data on the frequency of enteric adenoviruses, sapoviruses, and astroviruses in cases of sporadic acute gastroenteritis in Argentina are scarce. Methods. Descriptive design of a selection of fecal samples of children with diarrhea younger than 5 years referred between 2010 and 2021, with a previous negative result for rotavirus and norovirus. The presence of enteric adenovirus, sapovirus, and astrovirus was tested by molecular methods, with subsequent genotyping of positive samples. Results. At least 1 of the tested viruses was detected in 226 (39.4%) of the 574 selected samples. Specifically, adenovirus, sapovirus, and astrovirus were detected in 30.7%, 5.6%, and 3.1% of the samples, respectively. The most frequent viruses detected were adenovirus 41, sapoviruses GI.1 and GI.2, and astrovirus 1. Non-classic astroviruses were detected in 2 samples. Conclusions. Despite being less frequent, these enteropathogens are responsible for a large number of sporadic diarrhea events. Therefore, their study and surveillance contribute significantly to reduce the gap of undiagnosed cases.
Introducción. Los datos de frecuencia de los adenovirus entéricos, sapovirus y astrovirus en casos de gastroenteritis aguda esporádica en Argentina son escasos. Métodos. Diseño descriptivo sobre una selección de muestras de heces de menores de 5 años con diarrea remitidas durante el período 2010-2021, con resultado previo negativo para rotavirus y norovirus. Se estudió la presencia de adenovirus entéricos, sapovirus y astrovirus por métodos moleculares, con posterior genotipificación de las muestras positivas. Resultados. De 574 muestras seleccionadas, en 226 (39,4 %) se identificó al menos uno de los virus estudiados. En particular, se detectaron adenovirus, sapovirus y astrovirus en el 30,7 %, el 5,6 % y el 3,1 %, respectivamente. El adenovirus 41, los sapovirus GI.1 y GI.2, y el astrovirus 1 fueron los más frecuentemente detectados. Se identificaron dos muestras con astrovirus no clásicos. Conclusiones. A pesar de ser menos frecuentes, estos enteropatógenos son responsables de un número considerable de episodios de diarrea esporádica. Por lo tanto, su estudio y vigilancia contribuye significativamente a reducir la brecha de casos no diagnosticados.
Asunto(s)
Diarrea , Gastroenteritis , Humanos , Argentina/epidemiología , Gastroenteritis/virología , Gastroenteritis/epidemiología , Lactante , Preescolar , Diarrea/virología , Diarrea/epidemiología , Masculino , Femenino , Sapovirus/genética , Sapovirus/aislamiento & purificación , Heces/virología , Genotipo , Recién Nacido , Astroviridae/genética , Astroviridae/aislamiento & purificaciónRESUMEN
Canine Parvovirus type 2 (CPV-2) is a highly contagious virus that can cause severe systemic disease with gastroenteric symptoms in dogs, particularly in young puppies. Originating from the feline parvovirus in the late 1970s, it swiftly propagated globally, instigating a pandemic in dogs. Despite vaccination advancements, CPV-2 remains a substantial challenge for veterinary professionals and pet owners. This study aimed to contribute knowledge about the current situation of CPV-2 among dogs in southern Brazil. In this study, the sera of 125 dogs (mostly with gastroenteritis symptoms) were screened for antibodies against CPV-2 and their faeces for the virus itself. The results showed that 40% (50/125) of dogs were infected with CPV-2. Most animals (65.5%) had previously been exposed to CPV-2 (with serotitres equal or above 1:40), and only 37.6% had protective antibody titres equal or above 1:80. The findings have also demonstrated that vaccination against CPV-2 significantly reduced the risk of infection, with positive cases decreasing from 56.9% (unvaccinated) to 2.0% (fully vaccinated). Furthermore, the prevalence of CPV-2 decreased as dogs aged, with younger dogs and those with an incomplete or non-existent vaccination history at the highest risk of infection. In conclusion, this study provides valuable insight into the prevalence and risk factors associated with CPV-2 infection in dogs in southern Brazil, thereby providing valuable knowledge for the improvement of veterinary care and pet health.
Asunto(s)
Anticuerpos Antivirales , Enfermedades de los Perros , Gastroenteritis , Infecciones por Parvoviridae , Parvovirus Canino , Perros , Animales , Parvovirus Canino/inmunología , Parvovirus Canino/genética , Enfermedades de los Perros/virología , Enfermedades de los Perros/epidemiología , Enfermedades de los Perros/inmunología , Brasil/epidemiología , Infecciones por Parvoviridae/veterinaria , Infecciones por Parvoviridae/epidemiología , Infecciones por Parvoviridae/inmunología , Infecciones por Parvoviridae/virología , Gastroenteritis/virología , Gastroenteritis/epidemiología , Gastroenteritis/veterinaria , Anticuerpos Antivirales/sangre , Heces/virología , Masculino , Femenino , Vacunación/veterinariaRESUMEN
Norovirus is a common and highly transmissible gastrointestinal pathogen. Among 34 Nicaraguan households with a norovirus-infected child, 48% experienced norovirus transmission within 1 week, infecting 18% of household members; GII norovirus was more commonly transmitted than GI. Pediatric norovirus vaccines could prevent both index cases and transmission to close contacts.
Asunto(s)
Infecciones por Caliciviridae , Gastroenteritis , Norovirus , Niño , Humanos , Lactante , Gastroenteritis/epidemiología , Nicaragua/epidemiología , Composición Familiar , Infecciones por Caliciviridae/epidemiología , Heces , Genotipo , FilogeniaRESUMEN
Since the rotavirus vaccine was included in the Dominican Republic's national immunization schedule in 2012, the microbiologic etiologies of acute gastroenteritis have not been described. This study aimed to determine the contribution of rotavirus as an etiology of acute gastroenteritis over a 12-month period in children under 5 years of age in both an inpatient and an outpatient setting in Consuelo, Dominican Republic. All children who were seen at Niños Primeros en Salud clinic or admitted to Hospital Municipal Dr. Angel Ponce Pinedo for acute gastroenteritis during January 2021-April 2022 were enrolled in the study. Stools were evaluated for rotavirus, enteric parasites, and pathogenic bacteria. Pathogen detection was compared between outpatients and inpatients and on the basis of child's vaccination status. From 181 children enrolled, 170 stool samples were collected, 28 (16.5%) from inpatients and 142 (83.5%) from outpatients. Rotavirus was the most commonly detected pathogen and was proportionately more common among hospitalized children, with nine (32.1%) cases among hospitalized children and 16 (11.3%) among outpatient children. (Pearson χ2 = 8.1, P = 0.004). Among patients with a positive rotavirus result, vaccination rate was lower among moderate (hospitalized) (three of six; 50%) compared with mild (outpatient) diarrhea patients (12 of 15; 80%). Giardia lamblia (10%) was the next most prevalent pathogen detected in both inpatients and outpatients using standard laboratory measures. Despite the availability of rotavirus vaccination, rotavirus remains a common cause of gastrointestinal illness among children under 5 years of age in our cohort. Incomplete vaccination status was associated with hospitalization for gastrointestinal illness.
Asunto(s)
Gastroenteritis , Infecciones por Rotavirus , Vacunas contra Rotavirus , Rotavirus , Humanos , Niño , Lactante , Preescolar , Infecciones por Rotavirus/epidemiología , Infecciones por Rotavirus/prevención & control , República Dominicana/epidemiología , Diarrea/prevención & control , Hospitalización , HecesRESUMEN
Cepas atípicas de RVA isoladas de humanos e animais compartilham características genéticas e antigênicas, sugerindo fortemente uma transmissão interespécie. O G12 é, atualmente, reconhecido como um genótipo emergente globalmente. Neste estudo, foram caracterizados os genomas de três espécies raras G12P[9] (RVA/Human-wt/BRA/IAL-R870/2013/G12P[9], RVA/Human-wt/BRA/IAL-R1151/2012/G12P[9] e RVA/Human-wt/BRA/IAL R566/2011/G12P[9]) e quatro G12P[6] (RVA/Human-wt/BRA/IAL-R86/2011/G12P[6], RVA/Human-wt/BRA/IAL-R465/2019/G12P[6], RVA/Human-wt/BRA/IAL-R52/2020/G12P[6] e RVA/Human-wt/BRA/IAL-R95/2020/G12P[6]) detectadas em amostras de fezes de pacientes com gastroenterite aguda no Brasil durante a Vigilância Nacional de Rotavírus realizada de 2011 a 2020. As cepas foram submetidas a RT-PCR convencional para os 11 segmentos seguido do sequenciamento de Sanger e análise filogenética. Todas as cepas G12P[9] exibiram uma constelação genética AU-1-like (G12-P[9]-I3-R3-C3-M3-A3-N3-T3-E3-H6), enquanto as cepas G12P[6] mostraram a típica DS-1-like (G12-P[6]-I2-R2-C2-M2-A2-N2-T2-E2-H2). A partir do estudo filogenético, as cepas brasileiras IAL G12P[6] DS-1-like mostram ancestralidade genética africana e rearranjos com cepas americanas co-circulantes, sem evidências de transmissão zoonótica recente. Em relação às cepas brasileiras IAL G12P[9], estas evidenciam ancestralidade genética asiática e observa-se a evidência de transmissão interespecífica entre cepas humanas G12P[9] AU-1-like e cepas felinas/caninas...(AU)
Atypical RVA strains isolated from humans and animals share genetic and antigenic features, strongly suggesting an interspecies transmission. G12 type are currently recognized as a globally emerging genotype. In this study, were characterized the complete genomes of three rare G12P[9] (RVA/Human-wt/BRA/IAL-R870/2013/G12P[9], RVA/Human-wt/BRA/IAL-R1151/2012/G12P[9] and RVA/Human-wt/BRA/IAL-R566/2011/G12P[9]) and four G12P[6] (RVA/Human-wt/BRA/IAL-R86/2011/G12P[6], RVA/Human-wt/BRA/IAL-R465/2019/G12P[6], RVA/Human-wt/BRA/IAL-R52/2020/G12P[6] and RVA/Human-wt/BRA/IAL-R95/2020/G12P[6]) strains detected in stool samples from patients with acute gastroenteritis in Brazil during National Brazilian Rotavirus surveillance conducted from 2011 to 2020. The RVA strains were submitted to conventional RT-PCR targeting the 11 gene segments followed by Sanger sequencing and phylogenetic analysis. All G12P[9] strains displayed an AU-like genetic backbone constellation (G12-P[9]-I3-R3-C3-M3-A3-N3-T3-E3-H6), while G12P[6] strains showed the typical DS-1-like genetic backbone (G12-P[6]-I2-R2-C2-M2-A2-N2-T2-E2-H2). From the phylogenetic study, the Brazilian IAL G12P[6] DS-1-like strains show African genetic ancestry and rearrangements with co-circulating American strains belonging to the DS-1-like constellation, without evidence of recent zoonotic transmission. On other hand, the Brazilian IAL G12P[9] strains show Asian genetic...(AU)
Asunto(s)
Zoonosis , Salud Pública , Rotavirus , Monitoreo Epidemiológico , GastroenteritisRESUMEN
O bocavírus humano (HBoV) foi descrito pela primeira vez em 2005 e desde então associado como agente etiológico causador de doenças respiratórias e diarreia em todo mundo. Há 4 genótipos de HBoV identificados até o momento. HBoV-1 é comumente associado as infecções respiratórias, enquanto o HBoV-2, HBoV-3 e HBoV-4 são frequentemente detectados em amostras fecais. Coinfecções envolvendo o HBoV e outros agentes virais entéricos são frequentes. Vírus entéricos podem ser preservados em fezes congeladas por longos períodos. O objetivo do presente estudo foi investigar a frequência e a diversidade genotípica dos HBoV em amostras fecais históricas armazenadas e coletadas antes de 2005, a fim de compreender a história natural dos HBoV em pacientes com diarreia nas regiões Centro Oeste, Sul e Sudeste do Brasil. A associação do HBoV com outros vírus gastroentéricos de importância epidemiológica na doença diarreica também foi explorada. Um total de 3347 amostras foram selecionadas e testadas para HBoV por qPCR. As amostras positivas foram genotipadas por PCR convencional seguido de sequenciamento Sanger. As amostras positivas para HBoV por qPCR também foram testadas para a presença de Norovírus (NoV) por RT-qPCR e para Adenovirus Humano (HAdV) por PCR convencional e sequenciamento. HBoV foi detectado em 5,8% (195/3347). Coinfecção com NoV foi encontrada em 25,6% (50/195), HAdV 8,2% (16/195) e a tripla-infecção em 1% (2/195), totalizando 34,9% (68/195) de casos de coinfecções. Esses achados indicam que o HBoV pode ter um papel epidemiológico importante como único agente causador de doença diarreica em pacientes (65,2% de monoinfecções). A taxa de detecção variou significativamente de acordo com os anos de 2000-2001, 2002-2003 e 2003-2004 (p<0,05).
The human bocavirus (HBoV) was first described in 2005 and has since been associated as an etiological agent causing respiratory diseases and diarrhea worldwide. There are four genotypes of HBoV identified so far. HBoV-1 is commonly associated with respiratory infections, while HBoV-2, HBoV-3, and HBoV-4 are often detected in fecal samples. Coinfections involving HBoV and other enteric viral agents are common. Enteric viruses can be preserved in frozen feces for long periods. The aim of this study was to investigate the frequency and genotypic diversity of HBoV in stored historical fecal samples collected before 2005, in order to understand the natural history of HBoV in patients with diarrhea in the South and Southeast regions of Brazil. The association of HBoV with other gastroenteric viruses of epidemiological importance in diarrheal disease was also explored. A total of 3347 selected samples were tested for HBoV by qPCR. Positive samples were genotyped by conventional PCR followed by Sanger sequencing. Samples positive for HBoV by qPCR were also tested for the presence of Norovirus (NoV) by RT-qPCR and Human Adenovirus (HAdV) by conventional PCR and sequencing. HBoV was detected in 5.8% (195/3347) of samples. Coinfection with NoV was found in 25.6% (50/195), HAdV in 8.2% (16/195), and triple infection in 1% (2/195), totaling 34.9% (68/195) of coinfection cases. These findings indicate that HBoV may play an important epidemiological role as a single causative agent of diarrheal disease in patients (65.2% of monoinfections). The detection rate varied significantly according to the years 2000-2001, 2002-2003, and 2003-2004 (p<0.05), reinforcing that HBoV is an important pathogen in childhood diarrhea. The genotype was obtained in 32.8% (64/195) of positive HBoV samples, and genetic analysis identified the circulation of HBoV-1
Asunto(s)
Reacción en Cadena de la Polimerasa , Tipificación Molecular , Vigilancia en Salud Pública , GastroenteritisRESUMEN
Gastrointestinal viruses (GIV) are an important cause of childhood morbidity and mortality, particularly in developing countries. Their epidemiological impact in Venezuela during the COVID-19 pandemic remains unclear. GIV can also be detected in domestic sewage. Ninety-one wastewater samples from urban areas of Caracas collected over 12 months and concentrated by polyethylene-glycol-precipitation, were analyzed by multiplex reverse-transcription-PCR for rotavirus/calicivirus/astrovirus and enterovirus/klassevirus/cosavirus, and monoplex-PCR for adenovirus and Aichi virus. The overall frequency of virus detection was 46.2%, fluctuating over months, and peaking in the rainy season. Adenoviruses circulated throughout the year, especially type F41, and predominated (52.7%) over caliciviruses (29.1%) that peaked in the rainy months, rotaviruses (9.1%), cosaviruses (5.5%), astroviruses and enteroviruses (1.8%). Aichi-virus and klassevirus were absent. Rotavirus G9/G12, and P[4]/P[8]/P[14] predominated. The occurrence of GIV in wastewater reflects transmission within the population of Caracas and the persistence of a potential public health risk that needs to be adequately monitored.
Asunto(s)
Infecciones por Enterovirus , Enterovirus , Gastroenteritis , Picornaviridae , Rotavirus , Humanos , Aguas Residuales , Venezuela/epidemiología , Pandemias , Gastroenteritis/diagnóstico , Antígenos Virales , Adenoviridae , Infecciones por Enterovirus/epidemiología , HecesRESUMEN
Norovirus is a major cause of acute diarrheal disease (ADD) outbreaks worldwide. In the present study, we investigated an ADD outbreak caused by norovirus in several municipalities of Santa Catarina state during the summer season, southern Brazil in 2023. As of the 10th epidemiological week of 2023, approximately 87 000 ADD cases were reported, with the capital, Florianópolis, recording the highest number of cases throughout the weeks. By using RT-qPCR and sequencing, we detected 10 different genotypes, from both genogroups (G) I and II. Some rare genotypes were also identified. Additionally, rotavirus and human adenovirus were sporadically detected among the ADD cases. Several features of the outbreak suggest that sewage-contaminated water could played a role in the surge of ADD cases. Storm events in Santa Catarina state that preceded the outbreak likely increased the discharge of contaminated wastewater and stormwater into water bodies, such as rivers and beaches during a high touristic season in the state. Climate change-induced extreme weather events, including intensified rainfall and frequent floods, can disturb healthcare and sanitation systems. Implementing public policies for effective sanitation, particularly during peak times, is crucial to maintain environmental equilibrium and counter marine pollution.
Asunto(s)
Infecciones por Caliciviridae , Gastroenteritis , Norovirus , Humanos , Norovirus/genética , Brasil/epidemiología , Brotes de Enfermedades , Genotipo , Agua , Infecciones por Caliciviridae/epidemiología , HecesRESUMEN
Group A Rotavirus, Human Astrovirus, and Norovirus (RVA, HAstV, and NoV) are recognized as the major causative agents of acute gastroenteritis in children and adults worldwide. The aim of this study was to determine the prevalence and molecular epidemiology of RVA, HAstV, and NoV in wastewater from three cities in Uruguay. Thirty-six samples from Bella Unión, Salto, and Fray Bentos cities were analyzed using quantitative and qualitative PCR. RVA was the most frequently detected virus (50%), followed by HAstV (39%), NoV GII (36%), and NoV GI (25%). RVA strains were characterized as P[8] and G3 based on the VP4 and VP7 genes, respectively. Among NoV-positive samples, genotypes GI.2, GI.3, GI.5, GI.6, GI.7, GII.2, GII.6, and GII.4 were detected, and only one HAstV genotype (MLB1) was found. Our wastewater-based epidemiological approach provides a snapshot of the overall genetic diversity of these viruses in three cities of the Uruguay River basin during 2017-2018. These findings reinforce the importance of this environmental surveillance tool for monitoring epidemiological trends of enteric viruses circulating in the population, which can be used to guide public health intervention.
Asunto(s)
Infecciones por Caliciviridae , Gastroenteritis , Rotavirus , Niño , Adulto , Humanos , Aguas Residuales , Ciudades , Uruguay/epidemiología , Rotavirus/genética , Gastroenteritis/epidemiología , Genotipo , Filogenia , HecesRESUMEN
The coronavirus disease 2019 (COVID-19) pandemic has demonstrated that Wastewater Based Epidemiology is a fast and economical alternative for monitoring severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) at the community level in high-income countries. In the present study, wastewater from a city in the Peruvian Highlands, which lacks a wastewater treatment plant, was monitored for one year to assess the relationship between the concentration of SARS-CoV-2 and the reported cases of COVID-19 in the community. Additionally, we compared the relationship between rotavirus (RV), norovirus genogroup II (NoV GGII), and human adenovirus (HAdV) with the number of reported cases of acute gastroenteritis. Before commencing the analysis of the samples, the viral recovery efficacy of three processing methods was determined in spiked wastewater with SARS-CoV-2. This evaluation demonstrated the highest recovery rate with direct analysis (72.2 %), as compared to ultrafiltration (50.8 %) and skimmed milk flocculation (5.6 %). Wastewater monitoring revealed that 72 % (36/50) of the samples tested positive for SARS-CoV-2, with direct analysis yielding the highest detection frequency and quantification of SARS-CoV-2. Furthermore, a strong correlation was observed between the concentration of SARS-CoV-2 in wastewater and the reported cases of COVID-19, mainly when we shift the concentration of SARS-CoV-2 by two weeks, which allows us to anticipate the onset of the fourth and fifth waves of the pandemic in Peru up to two weeks in advance. All samples processed using the skimmed milk flocculation method tested positive and showed high concentrations of RV, NoV GGII, and HAdV. In fact, the highest RV concentrations were detected up to four weeks before outbreaks of acute gastroenteritis reported in children under four years of age. In conclusion, the results of this study suggest that periodic wastewater monitoring is an excellent epidemiological tool for surveillance and can anticipate outbreaks of infectious diseases, such as COVID-19, in low- and middle-income countries.
Asunto(s)
Adenovirus Humanos , COVID-19 , Gastroenteritis , Norovirus , Rotavirus , Niño , Humanos , Preescolar , SARS-CoV-2 , COVID-19/epidemiología , Perú/epidemiología , Aguas Residuales , Gastroenteritis/epidemiología , Brotes de Enfermedades , GenotipoRESUMEN
Human adenoviruses (HAdV) of species F are commonly involved in pediatric acute gastroenteritis (AGE). The real impact on Venezuelan health is unknown. To investigate the prevalence and molecular diversity of HAdV in Venezuela, 630 fecal samples collected from children with AGE in 3 cities, from 2001 to 2013, were tested by PCR. Species F and types F40/41 were identified by REA. HAdV was detected in 123 cases (19.5%), most from outpatient females under 24 months old. A progressive and substantial increase in the detection rate was observed over time, significantly higher in rotavirus vaccinated than unvaccinated children (28.4% vs. 9.5%, P = 0.00019). Phylogenetic analysis of 28 randomly selected genomes showed high similarity among HAdV-F40/41 and those worldwide. HAdV-F of type 41 prevailed (79.8%) and clustered into 2 intratypic major clades. The significant involvement of HAdV-F41 in AGE suggests the importance of actively monitoring viral agents other than rotavirus, especially after vaccine introduction.