Torque teno virus among dialysis and renal-transplant patients

Patients who undergo dialysis treatment or a renal transplant have a high risk of blood-borne viral infections, including the Torque teno virus (TTV). This study identified the presence of TTV and its genome groups in blood samples from 118 patients in dialysis and 50 renal-transplant recipients. The research was conducted in a hospital in the city of Maringá, state of Paraná. The viral DNA, obtained from whole blood, was identified by using two nested Polymerase Chain Reactions (PCR). The frequencies of TTV were 17% and 36% in dialysis patients using the methodology proposed by Nishizawa et al. (1997) and Devalle and Niel (2004), respectively, and 10% and 54% among renal-transplant patients. There was no statistically significant association between the frequency of the pathogen and the variables: gender, time in dialysis, time since transplant, blood transfusions, and the concomitant presence of hepatitis B, for either the dialysis patients or the renal-transplant recipients. Among dialysis patients and renal-transplant recipients, genogroup 5 was predominant (48% and 66% respectively), followed by genogroup 4 (37% and 48%) and genogroup 1 (23% and 25%). Genogroup 2 was present in both groups of patients. Some patients had several genogroups, but 46% of the dialysis patients and 51% of the renal-transplant recipients had only a single genogroup. This study showed a high prevalence of TTV in dialysis patients and renal-transplant recipients.

Vivências e necessidades de saúde de homens no período pós-nascimento de um filho / Experiences and health needs of men in the period post-birth of a child / Experiencias y necesidades de salud de los hombres en el período post-nacimiento de un hijo

Esta pesquisa aborda percepções de homens sobre suas experiências e necessidades de saúde no pós-nascimento. Objetiva-se distinguir analiticamente, a partir de uma perspectiva de gênero, necessidades de saúde relativas ao evento, experimentadas, expressas e/ou negadas pelos homens. Trata-se de um estudo exploratório-descritivo, qualitativo, realizado em dois territórios de saúde de Cuiabá, Mato Grosso, mediante entrevista semiestruturada e análise temática dos dados. Participaram oito homens que vivenciavam o pós-nascimento de um filho. Estes manifestaram, sobretudo, a necessidade de provimento de segurança financeira à família, destacando também a necessidade de bem estar do filho, acessando o retorno afetivo que a experiência traz. Não se reconheciam com necessidades de saúde no pós-nascimento. O apoio dos serviços locais de saúde é importante para que os homens se percebam na vivência da paternidade e a sua relação com aspectos socioculturais, para que distingam necessidades próprias, valorizem o cuidado de si e adotem uma perspectiva equânime de gênero.

This research addresses men’s perceptions about their experiences and health needs in the post-birth period. The goal is to distinguish analytically and from a gender perspective the health needs related to the event, experienced, expressed and/or denied by men. This is an exploratory, descriptive and qualitative study carried out in two municipal health areas of Cuiabá, state of Mato Grosso, using a semi structured interview and thematic analysis of the data. The participants were eight men who were experiencing the post-birth period of a child. Above all, they expressed the need to provide financial security to the family, emphasizing also the need of their children’s well-being, with the affective return that this experience brings. They did not perceive themselves with health needs during the post-birth period. The support provided by local health services is important so that men can understand the experience of parenthood and its relationship with social and cultural aspects in order to distinguish their own needs, appreciate self-care, and adopt a gender equity perspective.

Esta investigación aborda las percepciones de hombres acerca de sus experiencias y necesidades de salud en el período postparto. El objetivo es distinguir analíticamente, desde una perspectiva de género, las necesidades de salud relacionadas al evento, experimentadas, expresadas y/o negadas por los hombres. Se trata de un estudio exploratorio, descriptivo y cualitativo llevado a cabo en dos áreas municipales de salud de Cuiabá, Estado de Mato Grosso, mediante entrevista semiestructurada y análisis temático de los datos. Participaron ocho hombres que experimentaban el período postparto de un hijo. Ellos expresaron, sobre todo, la necesidad de proveer seguridad económica a la familia, destacando también la necesidad del bienestar de los hijos, con el retorno afectivo que esa experiencia proporciona. No se reconocían con necesidades de salud en el período postparto. El apoyo de los servicios locales de salud es importante para que los hombres entiendan la experiencia de la paternidad y su relación con aspectos socioculturales, para que distingan las necesidades, valoren el cuidado de sí mismos y adopten una perspectiva de equidad de género.

Acute gastroenteritis and enteric viruses in hospitalised children in southern Brazil: aetiology, seasonality and clinical outcomes

Viral acute gastroenteritis (AG) is a significant cause of hospitalisation in children younger than five years. Group A rotavirus (RVA) is responsible for 30% of these cases. Following the introduction of RVA immunisation in Brazil in 2006, a decreased circulation of this virus has been observed. However, AG remains an important cause of hospitalisation of paediatric patients and only limited data are available regarding the role of other enteric viruses in these cases. We conducted a prospective study of paediatric patients hospitalised for AG. Stool samples were collected to investigate human adenovirus (HAdV), RVA, norovirus (NoV) and astrovirus (AstV). NoV typing was performed by nucleotide sequencing and phylogenetic analysis. From the 225 samples tested, 60 (26%) were positive for at least one viral agent. HAdV, NoV, RVA and AstV were detected in 16%, 8%, 6% and 0% of the samples, respectively. Mixed infections were found in nine patients: HAdV/RVA (5), HAdV/NoV (3) and HAdV/NoV/RVA (1). The frequency of fever and lymphocytosis was significantly higher in virus-infected patients. Phylogenetic analysis of NoV indicated that all of these viruses belonged to genotype GII.4. The significant frequency of these pathogens in patients with AG highlights the need to routinely implement laboratory investigations.

Molecular characterization of Torque teno virus and SEN virus co-infection with HIV in patients from Southern Iran

Introduction Torque teno virus (TTV) and SEN virus are circular single-stranded DNA viruses that cause blood-borne infections. The SEN virus (SEN-V) was originally detected in the serum of an injection drug user infected with human immunodeficiency virus (HIV). Recently TTV was discovered as a potential causative agent of non-A-E hepatitis. The aim of this study was to investigate the prevalence of the SEN-V-D/H and TTV in HIV patients and healthy blood donors in Iran. Methods One hundred and fifty HIV patients with a mean age of 50.46 ± 18.46 years and 150 healthy blood donors with a mean age of 48.16 ± 13.73 years were included in this study. TTV and SEN-V were detected by the PCR and were quantitatively assayed by competitive PCR (nested and semi-nested PCR). Restriction fragment length polymorphisms (RFLPs) were used to determine the heterogeneity of TTV. Results TTV and SEN-V were detected 96 (64%) and 84 (56%) of 150 HIV patients respectively. These rates were 34% (n=51) and 37.33% (n=56) in healthy blood donors (significant, p<0.05). PCR detected SEN-V/TTV DNA from 32 of the healthy blood donors (21.33%), while 65 (43.33%) of HIV patients were positive for SEN-V/TTV DNA. Of 150 HIV patients, 32.66% and 23.33% were positive for SEN-V-H and SEN-V-D, respectively and 18.66% (n=28) were co-infected with SEN-V-D/H. Conclusions The prevalence of SEN-VD/H and TTV is higher in HIV patients than in healthy blood donors in Southern Iran. Our results suggest that TTV and SEN-V might play a role in the development of liver disease in patients with immunodeficiency diseases. .

A ten-month diseases survey on wild Litopenaeus setiferus (Decapoda: Penaeidae) from Southern Gulf of Mexico / Diez meses de análisis de las enfermedades en especímenes silvestres de Litopenaeus setiferus en el Sur del Golfo de México

The development of shrimp aquaculture in Mexican coasts of the Gulf of Mexico began to be explored using the Pacific white shrimp Litopenaeus vannamei in the mid 90´s. Many concerns over the risk of disease transmission to the economically important native penaeids, have been the main deterrent for the aquaculture of L. vannamei in the region. Concurrently, more than 10 years of research experience on the aquaculture suitability of the native Litopenaeus setiferus from the Terminos Lagoon, in the Yucatán Peninsula, have been accumulated. The aim of this study was then to determine the seasonal variations of the naturally acquired diseases and the possible detection of exotic pathogens. For this, random subsamples (n~60) of juveniles L. setiferus were collected from monthly captures. In order to detect the widest range of pathogens, including infectious hypodermal and hematopoietic necrosis (IHHNv) and white spot syndrome (WSSv) viruses, both histopathological and molecular methods were employed. Monthly prevalence (%) was calculated for every finding. We were able to detect a total of 16 distinct histological anomalies, most of which the presump- tive aetiological agent was readily identified. PCR results for viruses were negative. For some pathogens and symbionts, the prevalence was significantly different between the adult and juvenile populations. Prevalence of diseases tended to be higher in juvenile shrimp than in adults. The results of this study indicated that L. setiferus carry a wide variety of pathogens and symbionts that seem to be endemic to penaeids of the Gulf of Mexico, and those juveniles were more conspicuous to acquire pathogens and symbionts than adults.

Durante la década de los 90´s se introdujo el camarón blanco del Pacífico Litopenaeus vannamei a los Estados costeros mexicanos del Golfo de México con fines acuícolas, por lo que desde entonces existe preocupación por la posible introducción de enfermedades que puedan afectar a las poblaciones de camarones nativos. La investigación sobre la domesticación de especies nativas para una acuacultura sustentable se ha realizado por más de 10 años, sin embargo, aún existe escasa información sobre las enfermedades que se presentan de manera natural en estas poblaciones y posible trasfaunación. El presente estudio aborda el problema de las enfermedades encontradas en subpoblaciones de jóvenes y adultos de Litopenaeus setiferus del Área natural protegida Laguna de Términos, estado de Campeche, México. Técnicas de histología y biología molecular fueron utilizadas como herramientas de diagnóstico. Se encontró que L. setiferus es portador de patógenos y simbiontes endémicos del Golfo de México, y comparativamente, los jóvenes son más susceptibles en adquirir estas infecciones que los adultos, como probable respuesta al ambiente lacustre que ocupan. No se encontró evidencia de los virus IHHNv y WSSv, aunque en trabajos más recientes en algunos Estados del Norte ya se han detectado en poblaciones silvestres.

Infección por VPH en niñas sin contacto sexual / HPV infection in girls without sexual contact

Objetivo: Analizar los factores asociados con la infección por virus papiloma humano en las descendientes menores de 8 años que conviven con pacientes infectadas con el virus. Métodos: Se realizó un estudio descriptivo, transversal. La muestra fue no probabilística e intencional, la conformaron veintiocho (28) pacientes con diagnóstico de infección por VPH, tipificado por reacción en cadena de polimerasa asentado en su historia clínica y que tuvieran niñas menores de 8 años. Se realizó vulvoscopia a las niñas y toma de muestra por reacción en cadena de polimerasa. Resultados: Se obtuvo que en el 42,9 % la persona responsable de la higiene de la descendiente fue su madre, 89,3 % lavaba su ropa en conjunto con la de la niña (P<0,01). El 71,4 % refirió usar de forma compartida con las niñas toallas, sábanas y jabón de baño. Tanto en las madres como en sus descendientes, el tipo de virus papiloma humano mayormente diagnosticado fue el tipo 6, con predominio estadísticamente significativo de los virus de bajo riesgo en ambos grupos.

Objective: Analize the associated factors with human papilloma virus infection in the descendants who are under the age of 8 years old living with infected patients with the virus. Methods: It was made a descriptive, cross-sectional and non-experimental study. The sample was intentional and non probabilistic, integrated by twenty-eight (28) patients with a diagnosis of human papilloma virus infection, typified by polimerase chain reaction seated in their medical history and that they had girls under the age of 8 years. It was made a vulvoscopy to the children and sampling by polimerase chain reaction. Results: It was found that in 42.9 % the person responsible for the cleanliness of the descendant was her mother, 89.3 % washed their clothes in conjunction with the descendant´s (P<0,01), The 71.4 percent reported use of a shared with girls towels, bed linen and bathroom soap. On both the mother and their descendants, the mostly diagnosed type of human papilloma virus was type 6, with statistically significant predominance of viruses of low risk in both groups.

Acute respiratory viral infections in children in Rio de Janeiro and Teresópolis, Brazil / Infecções respiratórias agudas causadas por vírus em crianças do Rio de Janeiro e de Teresópolis, Brasil

The frequency of viral pathogens causing respiratory infections in children in the cities of Rio de Janeiro and Teresópolis was investigated. Nasal swabs from children with acute respiratory illnesses were collected between March 2006 and October 2007. Specimens were tested for viral detection by conventional (RT)-PCR and/or real time PCR. Of the 205 nasal swabs tested, 64 (31.2%) were positive for at least one of the viral pathogens. Single infections were detected in 56 samples, 50 of those were caused by RNA viruses: 33 samples tested positive for rhinovirus, five for influenza A, five for metapneumovirus, four for coronavirus and, three for respiratory syncytial virus. For the DNA viruses, five samples were positive for bocavirus and one for adenovirus. Co-infections with these viruses were detected in eight samples. Our data demonstrate a high frequency of viral respiratory infections, emphasizing the need for a more accurate diagnosis particularly for the emerging respiratory viruses. The fact that the emerging respiratory viruses were present in 9.2% of the tested samples suggests that these viruses could be important respiratory pathogens in the country.

Neste estudo foi investigada a frequência de patógenos virais causando infecção em crianças nas cidades do Rio de Janeiro e Teresópolis. Foram coletados 205 swabs nasais de crianças com infecção aguda do trato respiratório no período de março de 2006 a outubro de 2007. Os espécimes foram testados para detecção de vírus através de (RT)-PCR e/ou PCR em tempo real. Dentre as 205 amostras testadas, 64 (31,2%) foram positivas para pelo menos um vírus. Infecções causadas por um único agente viral foram detectadas em 56 amostras, 50 das quais eram causadas por vírus de RNA: 33 amostras foram positivas para rinovírus, cinco amostras foram positivas para influenza A, cinco amostras foram positivas para metapneumovírus, quatro amostras foram positivas para coronavírus e três amostras foram positivas para vírus respiratório sincicial. Para os vírus de DNA foram detectadas cinco amostras positivas para bocavírus humano e uma amostra positiva para adenovírus. Foram identificados oito casos de co-infecção. Nossos dados demonstram frequência elevada de infecções respiratórias virais, enfatizando a necessidade de um diagnóstico mais acurado destes patógenos, principalmente os vírus considerados emergentes. O fato de alguns vírus respiratórios emergentes terem sido detectados em 9,2% das amostras testadas sugere que estes vírus podem ser patógenos respiratórios importantes no país.

The high prevalence of Torque teno virus DNA in blood donors and haemodialysis patients in southern Brazil

This study investigates the frequency of Torque teno virus (TTV) infection in 150 blood donors and 77 patients requiring haemodialysis in southern Brazil. Plasma samples were screened for TTV DNA using polymerase chain reaction (PCR). The prevalences of TTV among blood donors and patients requiring haemodialysis were 73.3% and 68.8%, respectively. The presence of TTV was correlated with age in the blood donors (p = 0.024). In haemodialysis patients, no association was found between TTV infection and the demographic parameters (age, sex and education), the duration of haemodialysis or a history of blood transfusion. This study is the first to evaluate the prevalence of TTV infection in Brazilian patients requiring haemodialysis.

Detection of white spot syndrome virus in Brazil using negative staining, immunoelectron microscopy and immunocytochemistry techniques / Detección del virus del síndrome de mancha blanca en el Brasil utilizando inmunomicroscopía e inmunomarcación con partículas de oro coloidal

In this study thirty shrimp samples from commercial marine shrimp (L. vannamei) farms of southern region of Brazil were obtained. Hepatopancreas and shell scrapings fragments collected in these animals were processed by transmission electron microscopy using negative staining (rapid preparation), immunoelectron microscopy and immunocytochemistry (immunolabelling with colloidal gold particles) techniques. On the transmission electron microscopy a great number of white spot virus particles, ovoid or bacilliform-to-ellipsoid, measured 230-290 nm in length and 80-160 nm in diameter with intra-nuclear projections were visualized by the negative staining technique in 27 (90 percent) out of 30 samples examined. Using immunoelectron microscopy technique, the anti-VP 664 serum agllutinated a large number of particles formed by antigen-antibody interaction. In the immunocytochemistry technique, the antigen-antibody reaction was styrongly marked by the particles of colloidal gold over the virus. Notably, this is the first report, to our knowledge, describing use of these microscopy techniques to study Brazilian L. vannamei marine shrimp samples; moreover, this methodology also appears to be a viable complementary tool for diagnosing the presence of the white spot virus within shrimp tissues. Importantly, these are the first photoelectron micrographs of the WSSV in Brazil.

Se obtuvieron para el estudio 30 muestras de camarones marinos comerciales (L. vannamei) de las granjas de la región sur de Brasil. Fueron procesados fragmentos de hepatopáncreas y raspados internos del cefalotórax recogidos en estos animales por microscopía electrónica de transmisión con tinción negativa (preparación rápida), inmunomicroscopía y técnicas de inmunocitoquímica (inmunomarcación con partículas de oro coloidal). En la microscopía electrónica de transmisión de un gran número de partículas de virus de la mancha blanca, ovoide o elipsoidal a baciliformes, medían 230-290 nm de longitud y 80-160 nm de diámetro. En 27 (90 por ciento) de las 30 muestras examinadas intra-nuclear proyecciones se visualizaron mediante la técnica de tinción negativa. Utilizando una técnica de inmunomicroscopía electrónica, el anti-suero VP 664 reunió a un gran número de partículas formadas por la interacción antígeno-anticuerpo. En la técnica de inmunocitoquímica, la reacción antígeno-anticuerpo fue fuertemente reforzada por las partículas de oro coloidal en los virus. En particular, en Brasil este es el primer informe, a nuestro entender, que describe el uso de estas técnicas de microscopía en muestras de camarón marino L. vanamei. Además, esta metodología también parece ser una herramienta complementaria viable para diagnosticar la presencia del virus de la mancha blanca en tejidos de camarón. Es importante destacar que estas son las primeras fotos en microscopia electrónica del WSSV obtenidas en Brasil.

Prevalência e diversidade genética do torque teno vírus em pacientes com lúpus eritematoso sistêmico em serviço de referência no Mato Grosso do Sul / Prevalence and genetic diversity of torque teno virus in patients with systemic lupus erythematosus in a reference service in Mato Grosso do Sul

Estudos recentes sobre o torque teno vírus (TTV), gênero Anellovirus, permitiram construir a hipótese de que esse vírus pode ser um desencadeante ou tenha algum papel patogênico nas doenças reumáticas autoimunes. OBJETIVOS: Verificar a frequência da infecção pelo TTV em pacientes com lúpus eritematoso sistêmico (LES), e sua diversidade gênica, a existência de correlação entre a infecção pelo TTV e as manifestações clínicas do LES, sua evolução clínica e o perfil sorológico. PACIENTES E MÉTODOS: Foram obtidas 46 amostras de soro de pacientes com LES atendidos no Ambulatório de Reumatologia do Hospital Universitário de Campo Grande (NHU/FAMED/UFMS). Para os controles, utilizaram-se 46 amostras de soro de doadores de sangue. O DNA viral foi extraído das amostras utilizando o QIAamp DNA Blood Mini Kit (QIAGEN, Hilden, Alemanha), e amplificado utilizando a técnica de nested PCR. RESULTADOS: Foi encontrada positividade para o TTV em 17 (37 por cento) dos pacientes lúpicos, e em apenas sete (15,2 por cento) dos controles (teste z, P = 0,03). Não houve correlação entre a infecção pelo TTV, as manifestações clínicas, o perfil sorológico e a evolução clínica dos pacientes avaliados neste estudo. CONCLUSÃO: A presença do TTV nos pacientes com LES necessita ser mais bem compreendida a partir deste estudo inicial.

Recent studies on the torque teno virus (TTV), genus Anellovirus, have allowed formulating the hypothesis that TTV may trigger autoimmune rheumatic diseases or have some pathogenic role in them. OBJECTIVES: To determine the frequency of TTV infection in patients with systemic lupus erythematosus (SLE), the genetic diversity of TTV, the correlation between TTV infection and SLE clinical manifestations, and SLE clinical course and serological profile. PATIENTS AND METHODS:Serum samples were obtained from 46 SLE patients treated at the University-Affiliated Hospital of Campo Grande (NHU/FAMED/UFMS), Brazil. For controls, serum samples were obtained from 46 healthy volunteer blood donors. Viral DNA was extracted from samples using the QIAamp DNA Blood Mini Kit (QIAGEN, Hilden, Germany) and amplified using nested PCR. RESULTS: Positivity for TTV was found in 17 (37 percent) of SLE patients and in only seven (15.2 percent) of the controls (z test, P = 0.03). There was no correlation between TTV infection, SLE clinical manifestations, SLE clinical course, and the serological profile of the patients evaluated. CONCLUSION: Further studies on the presence of TTV in SLE patients are required.

Estar infectada com papilomavírus humano: vivências das mulheres e necessidades de cuidado / To be infected with human Papillomavirus: women lives and their necessities of care

O Papilomavírus humano (HPV) é um vírus, sexualmente transmissível, com potencialidade carcinogênica para a cérvice uterina, o que torna a infecção de mulheres pelo HPV um problema de saúde pública. Conhecer as necessidades de cuidado de mulheres infectadas pelo HPV inclui também saber suas experiências vividas durante o processo de infecção. A prevenção de doenças e a promoção de saúde ainda estão determinadas por concepções tradicionais da prática médica. É necessário pensar em um cuidado que vá além das necessidades físicas, emocionais e sociais que considere o sujeito com base em seu modo de ser no mundo e que valorize suas experiências, juntamente com suas crenças e valores. O objetivo deste estudo foi compreender a vivência das mulheres infectadas pelo HPV e conhecer quais são suas necessidades de cuidado. Tratou-se de um estudo qualitativo, com referencial da Fenomenologia existencial de Martin Heidegger. Os sujeitos foram 14 mulheres que tinham recebido o diagnóstico de HPV. As questões norteadoras foram: Como é para você estar com HPV? Conte-me sua experiência desde que soube do diagnóstico até hoje. Como está sendo a assistência que você tem recebido? Como resultado, emergiram quatro unidades temáticas: ser-aí mulher com HPV; ser-com nas relações; buscando o cuidado como solicitude e o caminho de transcendência da mulher com HPV. O referencial utilizado possibilitou melhor apreensão dos significados de estar com HPV, assim como o compartilhamento da vivênciadessas mulheres em seu cotidiano. Constatou-se a necessidade de implementar ações de promoção e prevenção à saúde, que devem ser executadas por profissionais capacitados e com um perfil adequado para atenção à mulher. As mulheres devem ser encorajadas a demonstrarem suas próprias necessidades de cuidado, e as questões culturais e de gênero devem ser consideradas. É preciso que os profissionais da área da saúde avancem no cuidado com as mulheres infectadas pelo HPV, superando o trabalho restrito à racionalidade das ciências biomédicas. A informação sobre o HPV deve ser compartilhada pelas mulheres, respeitando-se suas necessidades e seu nível de compreensão. É necessário um cuidado mais efetivo e afetivo, no qual as mulheres infectadas pelo HPV exerçam um papel ativo no processo do cuidado e as interações sejam verdadeiras.

The human Papillomavirus (HPV) is a virus, sexually transmittable, with potentiality carcinogenic for the uterine cervix, making women\'s infection by the HPV a problem for the public health. To know the necessities of care of women infected by the HPV includes also knowing their experiences during the process of infection. Diseases prevention and health promotion are still determined by traditional conceptions of medical practice. It is necessary to think about a care that goes besides the physical, emotional and social necessities, that considers the individual based on of her way of being in the world and considers her experiences, beliefs and values. The objective of this study was to understand the life experience of the women infected by the HPV and to know their necessities of care. This research have had a qualitative focus, with reference to the Existential Phenomenology by Martin Heidegger. Were subjected to this research 14 women HPV positive. The research was based on these questions: What does being HPV positive mean for you? Tell me the experience that you have had since you have known you were infected until today. How is the aid that you have been receiving? As result, four thematic topics surfaced: to be there a woman with HPV; to be a woman with HPV in relationships; looking for care as solicitude and the way of transcendence of the woman with HPV. The used referential made possible a better apprehension of the meanings of being with HPV, as well as theshare of the existence of these women in their daily life. The necessity of implementing health promotion and prevention actions was noted, and these actions must be executed by enabled professionals with a profile adapted for attention to the woman. The women must be encouraged to demonstrating their necessities of care themselves and questions of culture and of gender must be considered. It is necessary that professionals of the health area keep advancing in the care of women infected by the HPV, surpassing the work limited to the rationality of biomedical sciences. The information on the HPV must be shared by the women, respecting their necessities and their level of understanding. It is necessary a more effective and affectionate care, in which the women infected by the HPV play an active part in the process of the care and the interactions are true.

Torque teno virus (TTV) is prevalent in Brazilian non-human primates and chickens (Gallus gallus domesticus) / Torque teno virus (TTV) es prevalente en primates no humanos brasileños y pollos (Gallus gallus domesticus)

Torque Teno virus (TTV) is an infectious agent of worldwide distribution isolated by the first time as the agent of an acute post-transfusion hepatitis in a patient in Japan. It has been classified into a new floating genus called Anellovirus. Recent studies showed that TTV can also be identified in serum specimens obtained from domesticated farm animals and from non-human primates. To better understand the relationship between TTV and their hosts, a study to detect virus in the serum and whole blood of Brazilian non-human primates and in the plasm of chickens was performed by applying the PCR-UTR-A technique, followed by a genomic sequence and phylogenetic analysis. By nested-PCR-UTR, the DNA of TTV was detected in sera from 4 (5.3 percent) of 75 Cebus apella, 2 (40 percent) of 5 Alouatafusca, 1 (20 percent) of 5 Alouata caraya, 1 (5.2 percent) of 19 Callithrixpenicilata, 1 (4 percent) of 25 Callithrixjacchus, 1 (20 percent) of 5 Saimiri sciureus and 1 (25 percent) of 4 Leontopithecus chrysomelas. Phylogenetic analysis revealed that sequences detected in 8 samples clustered with TTV sequences So-TTV2 (Sagüínus oedipus) and At-TTV3 (Aotes Trivirgatus). Three sequences showed similarity with a human Torque Teno Minivirus (TLMV). TTV ORF2 DNA was detected in one sera sample and one whole blood sample of non-human primates and in one plasm sample of chicken. Phylogenetic analysis revealed that the sequences amplified by the ORF2 region show no difference between human, non-human primates and chicken. This is the first report of TTV in Brazilian new world non-human primates and chicken.

Torque Teno virus (TTV) es una agente infeccioso de distribución mundial, aislado por primera vez como el agente de una hepatitis aguda posterior a la transfusión de un paciente en Japón. Se ha clasificado en un nuevo género flotante llamado Anellovirus. Recientes estudios han demostrado que TTV también puede ser identificado en el suero de especímenes obtenidos desde granjas de animales domésticos y desde primates no humanos. Para entender mejor la relación entre la TTV y sus huéspedes, fue realizado un estudio para detectar el virus en el suero y la sangre de primates no humanos brasileños y en el plasma de pollos mediante la aplicación de la técnica PCR-UTR-A, seguida de una secuencia genómica y análisis filogenético. Por medio de PCR-UTR-anidado, el ADN de TTV fue detectado en sueros de 4 de 75 (5,3 por ciento)Cebus apella, 2 de 5 (40 por ciento) Alouata fusca, 1 de 5 (20 por ciento) de Alouata caraya, 1 de 19 (5,2 por ciento) de Callithrixpenicilata, 1 de 25 (4 por ciento) Callithrixjacchus, 1 de 5 (20 por ciento) de Saimiri sciureus y 1 de 4 (25 por ciento) de Leontopithecus chrysomelas. El análisis filogenético reveló secuencias detectadas en 8 muestras agrupadas con TTV secuencias So-TTV2 (Sagüínus oedipus) y At-TTV3 (Aotes Trivirgatus). Tres secuencias mostraron similitud con el Torque Teno Minivirus humano (TLMV). Fue detectado TTV ORF2 ADN en una muestra de suero y una muestra de sangre de primates no-humanos y en una muestra de plasma de pollo. El análisis filogenético reveló que las secuencias amplificadas por la región ORF2 no muestran ninguna diferencia entre humanos, primates no humanos y pollos. Este es el primer informe de nuevos TTV en primates-no humanos brasileños y en pollos.

Research of torque teno virus (TTV) in serum and total blood of Brazilian non-human primates and in chicken plasma (Gallus gallus domesticus) by the PCR N22 region / Investigación de Torque teno virus (TTV) en suero y sangre de primates no humanos brasileños y en plasma de pollo (Gallus gallus domesticus) por PCR en la region N22

Torque teno virus (TTV) is a recently discovered DNA virus that was originally isolated from a Japanese patient (initials, TT) with post-transfusion hepatitis of unknown aetiology. TTV is an circular DNA virus classified recently together with related Torque teño minivirus, into a new genus called Anellovirus. Infection TTV has been detected in a range of non-human primates as well as domestic animals. The purpose of this study was to search TTV in the serum and total blood of Brazilian monkeys and in plasma of domestic chickens by seminested PCR of coding region (N22), followed by a genomic sequence and phylogenetic analysis. No serum sample was amplified. TTV DNA was detected in total blood from 3 (4 percent) out of 75 brown-capuchin (Cebus apella) and from 1 (25 percent) out of 4 golden-headed lion-tamarin (Leontopithecus chrysomelas). Phylogenetic analysis revealed that one sample showed similarity with one sequence of the cotton top tamarin (Saguinus oedipus) (So-TTV2) and with one of the douroucoulis (ão tes trivirgatus) (At-TTV3). Two samples showed similarity with a human Torque Teño Mini Virus (TLMV). The other sample clustered with one sequence of the chimpanzee (Pt-TTV6) and with the human TTV strain TA278. The plasma chicken samples tested were all negative. The amino acid sequences reported in this study are the first obtained in Brazil from total blood of non-human primates naturally infected by TTV.

Torque teno virus (TTV) es un virus de ADN recientemente descubierto que fue inicialmente aislado de un paciente japonés (iniciales TT) después de la transfusión de hepatitis de etiología desconocida. TTV es un virus de ADN circular recientemente clasificado junto con los torque teno minivirus, en un nuevo género llamado Anellovirus. La infección de TTV se ha detectado en una serie de primates no humanos, así como animales domésticos. El objetivo de este estudio fue buscar TTV en el suero y sangre total de monos de Brasil y en el plasma de pollos domésticos, por seminested PCR de la región de codificación (N22), seguido de una secuencia genómica y el análisis filogenético. Las muestras que no eran suero fueron amplificadas. TTV DNA se detectó en sangre total de 3 (4 por ciento) de un total de 75 capuchinos de cabeza dura (Cebus apella) y de 1 (25 por ciento) de un total de 4 tití- león de cabeza dorada (Leontopithecus chrysomelas). El análisis filogenético demostró que una muestra presentaba similitud con una secuencia de Saguinus Edipo (So-TTV2) y con una de Aotes trivirgatus (A-TTV3). Dos muestras mostraron similitud con un torque teno mini virus (TLMV) humano. La otra muestra agrupada con una secuencia de los chimpancés (PT-TTV6) y con el TTV humanos cepa TA278. El análisis de las muestras de plasma de pollo fueron negativas Las secuencias de aminoácidos que se reportan en este estudio son las primeras obtenidas en Brasil de sangre de primates no humanos infectados naturalmente por TTV.

Nucleopolyhedrovirus infected central nervous system cells of Bombyx mori ( L. ) ( Lepidoptera: Bombycidae )

O Nucleopolyhedrovirus é um vírus que infecta uma série de insetos, como o bicho-da-seda, Bombyx mori (L.). Um isolado geográfico do vírus, o Bombyx mori Nucleopolyhedrovirus múltiplo (BmMNPV), foi utilizado para se analisar a citopatologia em células do sistema nervoso central (SNC) de lagartas de B. mori. O BmMNPV foi inoculado experimentalmente e segmentos do tecido nervoso foram processados para microscopia de luz e microscopia eletrônica de transmissão. Células do SNC (nervosas, gliais e do perineuro) revelaram indícios de infecção no 5° dia pós-inoculação com o BmMNPV, cujas características citopatológicas foram: hipertrofia nuclear, presença do estroma virogênico, onde são sintetizados os virions, e formação dos poliedros. Não foi observada lise das células do SNC infectadas, uma característica das infecções pelo NPV; contudo, poliedros maduros foram evidenciados em espaços nos gânglios e conectivos nervosos. Esses poliedros possivelmente são oriundos das traquéias que penetram no sistema nervoso, e suas células, susceptíveis ao BmMNPV, sofrem lise após infecção. Os resultados indicam, ainda, que o sistema traqueal é responsável pela dispersão da infecção causada pelo BmMNPV no SNC de lagartas de B. mori. Neste sentido, os ramos que formam o sistema traqueal possibilitam o rompimento da barreira hemolinfa/sistema nervoso, permitindo que os virions tenham acesso 'a matriz extracelular do SNC e, conseqüentemente, às suas células constituintes.

A multiplex PCR assay able to simultaneously detect Torque teno virus isolates from phylogenetic groups 1 to 5

Torque teno virus (TTV) is a circular, single-stranded DNA virus that chronically infects healthy individuals of all ages worldwide. TTV has an extreme genetic heterogeneity which is reflected in its current classification into five main phylogenetic groups (1-5). Using specific PCR assays, it has been shown that many individuals are co-infected with TTV isolates belonging to different phylogenetic groups. Here, a multiplex PCR assay was developed, using five recombinant plasmids. Each plasmid carried an insert of different size issued from a TTV isolate belonging to a different group. The assay was able to simultaneously amplify DNAs of TTV isolates belonging to all five phylogenetic groups. Multiplex PCR was then tested satisfactorily on DNAs extracted from 55 serum samples (47 health care workers and 8 AIDS patients). All individuals but nine were infected with at least one TTV isolate. Co-infection with multiple isolates was found in 29/47 (62 percent) health care workers and in 8/8 (100 percent) AIDS patients. A number of discrepancies were observed when results obtained with three thermostable DNA polymerases were compared. For example, four TTV phylogenetic groups were detected in a particular serum sample by using one of the three DNA polymerases, whereas the other two enzymes were able to detect only three TTV groups. However, none of the three enzymes used could be broadly considered to be more efficient than the others. Despite its limitations, the assay described here constitutes a suitable tool to visualize the degree of co-infection of a given population, avoiding time-consuming experiments.

Genomic characterization of a Brazilian TT Virus isolate closely related to SEN virus-F

SEN virus (SENV) is a circular, single stranded DNA virus that has been first characterized in the serum of a human immunodeficiency virus type 1 (HIV-1)-infected patient. Eight genotypes of SENV (A-H) have been identified and further recognized as variants of TT virus (TTV) in the family Circoviridae. Here we describe the first genomic characterization of a SENV isolate (5-A) from South America. Using 'universal' primers, able to amplify most, if not all, TTV/SENV genotypes, a segment of > 3 kb was amplified by polymerase chain reaction from the serum of an HIV-1 infected patient. The amplicon was cloned and a 3087-nucleotide sequence was determined, that showed a high (85 percent) homology with the sequence of the Italian isolate SENV-F. Proteins encoded by open reading frames (ORFs) 1 to 4 consisted of 758, 129, 276, and 267 amino acids, respectively. By phylogenetic analysis, isolate 5-A was classified into TTV genotype 19 (phylogenetic group 3), together with SENV-F and TTV isolate SAa-38.

Stimulation of jasmonic acid production in Zea mays L. infected by the maize rough dwarf virus-Río Cuarto: reversion of symptoms by salicylic acid

In the present paper we study the possible biological relevance of endogenous jasmonic acid (JA) and exogenous salicylic acid (SA) in a plant-microbial system maize-virus. The virus disease "Mal de Río Cuarto" is caused by the maize rough dwarf virus-Río Cuarto. The characteristic symptoms are the appearance of galls or enations in leaves, shortening of the stem internodes, poor radical system and general stunting. Changes in JA and protein pattern in maize control and infected plants of a virus-tolerant cultivar were investigated. Healthy and infected-leaf discs were collected for JA measurement at different post-infection times (20, 40, 60 and 68 days). JA was also measured in roots on day 60 after infection. For SDS-PAGE protein analysis, leaf discs were also harvested on day 60 after infection. Infected leaves showed higher levels of JA than healthy leaves, and the rise in endogenous JA coincided with the enation formation. The soluble protein amount did not show differences between infected and healthy leaves; moreover, no difference in the expression of soluble protein was revealed by SDS-PAGE. Our results show that the octadecanoid pathway was stimulated in leaves and roots of the tolerant maize cultivar when infected by this virus. This finding, together with fewer plants with the disease symptoms, suggest that higher foliar and roots JA content may be related to disease tolerance. SA exogenous treatment caused the reversion of the dwarfism symptom.

Prevalência e diversidade genética dos novos vírus humanos TTV e TLMV em Florianópolis, Santa Catarina / Diversity and genetic targets of new human virus TTC and TLVM in Florianopolis, Santa Catarina

O TTV é um novo vírus humano não envelopado, com um genoma de DNA circular de fita simples com polaridade negativa; foi primeiro identificado no sangue de uma paciente com hepatite pós-transfusional de etiologia desconhecida. Neste trabalho utilizando três ensaios de PCR de diferentes regiões do genoma para determinar a prevalência do TTV em diferentes faixas etárias. Foram coletadas 130 amostras de sangue de crianças e adultos que visitaram o Hospital Universitário da UFSC, em Florianópolis, SC. para atendimento ambulatorial. A prevalência de TTV no soro, utilizando pelo menos um ensaio de PCR, foi de 44 por cento em adultos e de 73 por cento no soro de crianças até 10 anos de idade. Resultados mostram uma alta prevalência da infecção por TTV no sul do Brasil. Recentemente, um outro vírus DNA, circular, não envelopado de fita simples, foi isolado do soro de doadores de sangue japoneses e foi denominado como TTV-Like Mini Virus (TLMV). Pouco é conhecido sobre a prevalência de TLMV em humanos. A prevalência da infecção por TLMV determinada por PCR em 184 amostras de sangue coletadas em pacientes de Florianópolis, SC. foi de 78 por cento, os produtos de PCR dos soros de três pacientes (pacientes A-C) foram clonados e as seqüências nucleotídicas de um total de 16-19 clones de cada paciente foram determinadas. Oito diferentes seqüências foram obtidas para 19 clones derivados do paciente A, 10 seqüências distintas para 17 clones derivado do paciente B e quinze dos 16 clones derivados do paciente C foram idênticos, apresentando apenas duas seqüências distintas. Estes dados sugerem que adultos e crianças estão freqüentemente coinfectados com vários isolados de TLMV de origens diferentes.O TTV apresenta uma grande diversidade genética, apesar de ser um vírus DNA e numerosos variantes altamente divergentes foram identificados. Estes genótipos foram classificados em quatro grupos filogenéticos. Quatro isolados, originários de pacientes japoneses foram denominados vírus YONBAN, pertencendo ao genótipo 21 foi padronizado. Com este ensaio, 48/184 (36 por cento) das amostras de soro e 76/167 (46 por cento) das amostras de saliva, coletadas de pacientes ambulatoriais não selecionados, foram positivos. Verificou-se entre os índios pertencentes a três grupos étnicos da região amazônica, que 18/137 (49 por cento) eram positivos. A análise filogenética mostrou que três isolados de índios formavam um subgrupo separado dentro do genótipo 21.