True prevalence and spatial distribution of equine infectious anemia virus (EIAV) in horses from northeast region of Brazil

Equine infectious anemia (EIA) is a viral infection, caused by a lentivirus of the Retroviridae family, Orthoretrovirinael subfamily and its occurrence generates significant economic losses due to culling of positive animals as a measure of infection control. The objective of this work was to determine the prevalence of horses positive for equine infectious anemia virus (EIAV) and to identify the occurrence of areas with higher densities of cases in the states of Paraíba (PB), Pernambuco (PE), Rio Grande do Norte (RN) and Ceará (CE), Northeast region of Brazil, during the rainy (May and June) and dry (October and November) periods of 2017 and 2018. Serum samples from 6,566 horses from the states of PB, PE, RN and CE, Brazil, provided by the Laboratório Veterinária Diagnóstico - Ltda., were used. Serological diagnosis of EIA was performed using indirect enzyme-linked immunosorbent assay (ELISA) as a screening test and agar gel immunodiffusion test (AGID) as a confirmatory test. The apparent prevalence was obtained by dividing the number of seroreactive animals by the total number of animals, while the true prevalence was estimated by adjusting the apparent prevalence, considering the sensitivity (100%) and specificity (98.6%) of the diagnostic protocol used. For the construction of Kernel estimates, the Quartic function was used. In the dry season, of the 1,564 animals sampled, 28 were serologically positive, of which 19 belonged to the state of Ceará, 7 to Paraíba and 2 to Rio Grande do Norte. In 2018, it was observed that, during the rainy season, 26 of the 1,635 horses were seroreactive, with 19 cases resulting from Ceará, 4 from Paraíba and 3 from Pernambuco. In the dry season, 32 of the 1,526 animals were seroreactive to EIAV, of which 26 were from Ceará, 3 from Paraíba, 1 from Rio Grande do Norte and 2 from Pernambuco. In the dry period of 2017, the CE had a real prevalence of 1.22% (95% CI = 0.05 - 2.99%). In 2018, during the rainy season, prevalences of 0.03% (95% CI = 0 - 1.18%) were identified in CE and 1.69% (95% CI = 0 - 8.38%) in PE. Regarding the 2018 dry period, a prevalence of 1.32% (95% CI = 0.26 - 2.84%) was found in the state of CE. In both dry and rainy periods of 2017, the presence of spatial clusters of animals positive for EIA was observed, mainly in the border areas among the states of CE, PE, PB and RN. In 2018, there was a variation in the distribution of areas with higher densities of cases between the rainy and dry periods. The state of CE had the highest prevalence of positive animals and the presence of areas with higher densities of EIA cases in both climatic periods, in the years 2017 and 2018. In some municipalities of the CE, important sporting events of agglomeration of animals take place, which can favor the transmission of EIAV by facilitating the contact of infected and susceptible animals. Population density may be a factor associated with the higher prevalence observed in this region, as it has the second largest herd among the states studied. Higher densities indirectly contribute to the occurrence of infectious diseases, as they favor the contact of infected and susceptible animals. The occurrence of higher densities of cases in the border areas of the states of PE, RN, CE, and PB may be related to the greater movement of animals in these regions, favoring the indirect contact of infected horses with susceptible ones. The observed results demonstrate the circulation of the EIAV in four states in the Northeast region of Brazil.(AU)

Prevalencia de infección por los virus de la hepatitis B, D y por retrovirus en la etnia Matsés (Loreto, Perú) / Prevalence of retrovirus, hepatitis B and D infection in the Matsés ethnic group in Loreto, Peru

RESUMEN Para determinar la prevalencia de infección por los virus de la hepatitis B y D (VHB y VHD, respectivamente), VIH y HTLV-1/2 en la etnia matsés, después de la inmunización contra el VHB se realizó un estudio transversal y poblacional, utilizando pruebas de ELISA y qPCR en 963 pobladores. Las prevalencias de HBsAg, anti-HBc y anti-HBs fueron 3,3%, 36,0% y 58,7%, respectivamente. En el 3,1% de la población la carga viral fue mayor a 2000 UI/mL. En menores de 10 años, la prevalencia de HBsAg y anti-HBc fue 0,0% y 2,6%, respectivamente, mientras que en el 94,4% se encontraron anticuerpos protectores. La prevalencia de infección por el VIH y el HTLV-1/2 fue 1,5% y 0,6%, respectivamente. Se concluye que existen tasas bajas de infección por el VHB y el VHD en la población infantil de la etnia matsés. Asimismo, se confirma la presencia de infección por el VIH y el HTLV-1/2.

ABSTRACT Observational, cross-sectional, populational study to determine the prevalence of infection by hepatitis B virus (HBV), hepatitis D virus (HDV), human immunodeficiency virus (HIV) and human T-lymphotropic virus type 1 and 2 (HTLV-1/2) in the Matsés ethnic group, after immunization against HBV. ELISA and qPCR tests were used in 963 residents. The prevalence of HBsAg, Anti-HBc and Anti-HBs was 3.32%, 36.03% and 58.67% respectively. In 3.1% of the population the viral load was greater than 2000 IU/mL. In children under 10 years, the prevalence of HBsAg and anti-HBc was 0.0% and 2.6%, respectively, while protective antibodies were found in 94.4%. The prevalence of HIV and HTLV-1/2 infection was 1.5% and 0.6%, respectively. It is therefore concluded that there are low rates of HBV and HDV infection in the Matsés child population. Likewise, the presence of HIV and HTLV-1/2 infection is confirmed.

Unusual feline Dirofilaria immitis infection: a case report / Infecção incomum por Dirofilaria immitis em felino: relato de caso

Abstract Cats are less susceptible to Dirofilaria immitis infection than dogs. Although rare, the feline disease can be fatal even with low parasitic loads. The infection is often asymptomatic or has non-specific symptoms that are mainly associated with the death of immature worms. Microfilaremia is rare and transient. Normally, microfilaremia, when present, lasts for not more than 33 days. This study describes a feline case presenting with non-specific clinical signs and prolonged microfilaremia. Case: a random bred cat infected by feline leukemia virus (FeLV) that was found to be microfilaremic by chance. The infection was detected by the presence of microfilariae in a blood smear and was confirmed by antigen test (SNAP Feline Triple Test, Idexx®) and echocardiogram.

Resumo Gatos são menos susceptíveis à infecção por Dirofilaria immitis do que cães. Apesar de rara, a doença nos gatos pode ser fatal mesmo com baixas cargas parasitárias. Muitas vezes, a doença é assintomática ou apresenta sintomas inespecíficos, principalmente associados com a morte de formas parasitárias imaturas. Microfilaremia é rara e transitória. Normalmente, quando ocorre microfilaremia, ela permanece por, no máximo, 33 dias. Este estudo descreve o caso de um felino que apresentava sinais inespecíficos e microfilaremia prolongada: um gato sem raça definida, portador de infecção pelo vírus da leucemia felina (FeLV) que foi diagnosticado como microfilaremico ao acaso. A infecção foi detectada pela presença de microfilárias em esfregaço sanguíneo e, posteriormente, confirmada pelo teste de antígenos (SNAP Feline Triple Test, Idexx®) e por ecocardiograma.

Avaliação de dois testes sorológicos comerciais para diagnóstico das infecções pelo FIV e pelo FeLV / Evaluation of two point-of-care tests to diagnosis of FIV and FeLV infections

FIV e FeLV são retrovírus associados principalmente com neoplasias. Dois testes rápidos são disponibilizados no Brasil para o diagnóstico dessas infecções: um kit de imunocromatografia de fluxo bidirecional (SNAP® Combo IDEXX) e um kit de imunocromatografia de fluxo lateral unidirecional (ALERE/BIONOTE Anigen Rapid). O objetivo deste estudo foi comparar o teste SNAP® com o teste ALERE. Amostras de sangue de 178 gatos foram testadas utilizando-se ambos os kits. A reação em cadeia de polimerase em tempo real (qPCR) foi empregada como método confirmatório para todos os resultados. O teste SNAP® apresentou sensibilidade e especificidade de 100% para FIV; a sensibilidade e a especificidade do teste ALERE foram de 96,15% e 98,68%, respectivamente. A sensibilidade e a especificidade para o FeLV foram de 93,02% e 96,30% para o teste SNAP® e de 90,70% e 97,78% para o teste ALERE. Ainda em relação ao FeLV, três amostras com resultado positivo na qPCR obtiveram resultado falso-negativo em ambos os testes. Não houve diferença estatisticamente significante entre os métodos. Considerando a qPCR como padrão-ouro, o teste SNAP® apresentou maior sensibilidade e especificidade para o FIV, e o teste ALERE apresentou maior especificidade para o FeLV. Os resultados mostraram uma boa correlação entre os testes.(AU)

FIV and FeLV are Retrovirus associated mainly with feline neoplasms. Two point-of-care tests are commercially available in Brazil for diagnosis of these infections: a bidirectional flow immunochromatography kit (IDEXX SNAP ® Combo) and a lateral unidirectional flow immunochromatography kit (ALERE/BIONOTE Anigen Rapid). The aim of this study was to compare SNAP ® and ALERE tests. Blood samples obtained from 178 cats were evaluated using both tests. Quantitative real-time polymerase chain reaction (qPCR) was used as confirmatory test for all samples. The sensitivity and specificity of SNAP ® test was 100% for FIV, and for ALERE test was 96.15% and 98.68%, respectively. The sensitivity and specificity for FeLV was 93.02% and 96.30% for SNAP ® test and 90.70% and 97.78% for ALERE test. Three samples with a qPCR positive result for FeLV obtained a false negative result in both SNAP ® and ALERE tests. There was no statistically significant difference between the two methods. Considering qPCR as gold standard method, the SNAP® test showed higher sensitivity and specificity for FIV, and the ALERE test presented higher specificity for FeLV. The results showed good agreement among the tests.(AU)

Hematological findings and factors associated with feline leukemia virus (FeLV) and feline immunodeficiency virus (FIV) positivity in cats from southern Brazil / Achados hematológicos e fatores associados a positividade pelo vírus da leucemia felina (felv) e vírus da imunodeficiência felina em gatos do sul do Brasil

Using a retrospective study, 493 cats tested for FeLV and FIV were selected for analysis of the association between hematologic findings and positivity at immunoassay test. Individual and hematologic variables were assessed considering the influence of results using univariate and multivariate logistic regression analysis. Out 153 of the 493 cats were positive for FeLV (31%), 50 were positive for FIV (10.1%) and 22 were positive for both FIV and FeLV (4.4%). Multivariate analysis detected significant associations between FeLV infection and age below 1 year (p=0.01), age from 1 to 10 years (p=0.03), and crossbreed (p=0.04). Male cats were more likely to be FIV-positive (p=0.002). Regarding hematological changes, FeLV-positive cats have higher odds to anemia, leukopenia and lymphopenia than FeLV-negative cats. FIV-positive cats are more likely to have anemia than negative. Identification of associated factors related to animal status and correlation of hematological disorders with infection by retroviruses in cats could be useful for detecting these retroviral diseases in cats.(AU)

Através de um estudo retrospectivo, 493 gatos testados para FeLV e FIV foram selecionados para análise da associação entre as alterações hematológicas e a positividade no teste imunoenzimático. Variáveis individuais e hematológicas foram consideradas para verificar a influência dos resultados utilizando análise de regressão logística univariada e multivariada. Um total de 153 de 493 gatos avaliados foram positivos para o FeLV (31%), 50 foram positivos para o FIV (10,1%) e 22 foram positivos para FIV e FeLV (4,4%). Análise multivariada detectou uma associação significativa entre a infecção pelo FeLV e a idade abaixo de 1 ano (P=0,01), idade entre 1 a 10 anos (P=0,03) e raça mista (P=0,04). Gatos machos foram mais predispostos a serem positivos para FIV (P=0,002). Com base nas alterações hematológicas, gatos positivos para o FeLV tem maior odds para apresentar anemia, leucopenia e linfopenia que os negativos. Gatos positivos para FIV possuem maiores chances de apresentarem anemia que os gatos negativos. A identificação dos fatores associados à infecção relacionados ao perfil do animal e a correlação com os distúrbios hematológicos com a infecção, pode ser útil para detecção das doenças retrovirais em gatos.(AU)

Impacto na qualidade de vida em pacientes usuários de medicação retroviral e submetidos à gluteoplastia: estudo de coorte histórica / Gluteal contour restoration in antiretroviral users and its quality-of-life related impacts: a historical cohort study

INTRODUÇÃO: Desde a introdução do tratamento do HIV com uso da terapia antirretroviral altamente ativa, a mortalidade por essa doença foi reduzida drasticamente em todo o mundo. Um dos parefeitos relacionados à utilização desses fármacos é a lipodistrofia glútea. O objetivo deste trabalho é verificar o impacto da correção dessa deformidade na qualidade de vida de pacientes com HIV. MÉTODOS: Foi conduzido um estudo de coorte histórica com 23 pacientes submetidos à gluteoplastia com implante intramuscular, entre janeiro de 2010 e dezembro de 2014, avaliando a qualidade de vida por meio do em Nottingham Health Profile em. As informações foram coletadas de julho a agosto de 2015. A análise estatística foi feita utilizando-se o em Related-Samples McNemar Test em. RESULTADOS: strong Houve diferença significativa entre o pré-operatório e pós-operatório em 19 das 38 perguntas. CONCLUSÃO: É possível afirmar que a reconstrução glútea melhora a qualidade de vida de pacientes HIV positivos acometidos por lipodistrofia glútea relacionada a antirretrovirais.

INTRODUCTION: Since the introduction of highly active antiretroviral therapy for the treatment of human immunodeficiency virus (HIV), disease mortality has been dramatically reduced worldwide. One related side effect from the use of these drugs is gluteal lipodystrophy. The aim of this study is to assess the quality-of-life impact of correcting this deformity in HIV patients. METHODS: A historical cohort study was conducted between January 2010 and December 2014 with 23 patients, assessing the quality of their lives using the Nottingham Health Profile. A statistical analysis was performed using the McNemar test for related samples. RESULTS: There was a significant difference between preoperative and postoperative response in 19 of the 38 questions. CONCLUSION: We may say that gluteal reconstruction plays a role in improving quality of life for HIV patients who have been affected by antiretroviral related gluteal lipodystrophy.

Prevalencia del virus linfotrópico de células T humanas (HTLV) I/II en donantes de sangre / Prevalence of Human T-Lymphotropic Virus HTLV I/II among Blood Donors

La transmisión de infecciones por vía transfusional (sangre y derivados plasmáticos) es una complicación de gran importancia en relación con la morbimortalidad en receptores de sangre, lo que ha creado la necesidad de establecer estrategias de prevención que reduzcan o eliminen este riesgo. Como enfoque principal este estudio pretendió determinar la prevalencia del virus linfotrópico de células T humanas (HTLV) I/II en donantes que acuden a un banco de sangre hospitalario, además de abordar de manera documental y experimental la importancia de la implementación de dicha prueba, durante el tamizaje rutinario para unidades de sangre. Se utilizó el inmunoanálisis quimioluminiscente de micropartículas (CMIA) que detecta la presencia de anticuerpos contra antígenos del HTLV-I/II en el suero del donante y que se basa en la emisión de quimioluminiscencia. En el periodo de estudio se realizaron 650 pruebas que representan el 6.5% del total anual de donantes atendidos en un banco de sangre hospitalario. Los resultados indicaron que la prevalencia del HTLV I/II en esta muestra de donantes fue de 0.15%, con un intervalo de confianza del 95-99.5% [0.14, 0.29], sugiriendo que la inclusión de la determinación de HTLV I/II en las pruebas obligadas por la Ley de Servicios de Medicina Transfusional y Bancos de Sangre, Decreto 87-97 de Guatemala es de importancia considerando los datos obtenidos y analizados.

The infections transmitted via blood transfusion (blood and plasma derivatives) are a complication of great importance in relation to morbidity and mortality in blood recipients, what has created the need to establish prevention strategies that reduce or eliminate this risk. The main focus of this study was to determine the prevalence of Human T-Lymphotropic Virus HTLV I/II among blood donors who attend a Hospital Blood Bank, in addition to addressing in a documental and experimental way, the importance of the implementation of this test during the routine screening of blood units. To this end, a chemiluminescent microparticle immunoassay (CMIA) was used to detect the presence of antibodies to HTLV-I/II in plasma from donors. In the study period, 650 samples were tested, representing 6.5% of total annual donors attending the Hospital Blood Bank. Results indicated that the prevalence of the Human T-Lymphotropic Virus HTLV I/II in this population was 0.15%, with the confidenceinterval of 95-99.5% [0.14, 0.29], suggesting that the inclusion of the determination of HTLV I/II in tests required by the Law of Services of Transfusion Medicine and Blood Banks, Decree 87-97 of Guatemala is of importance considering the data obtained and analyzed.

Anemia infecciosa equina: Una revisión / Equine infectious anemia: A review

La Anemia Infecciosa Equina (en ingles Equine Infectious Anemia EIA), es una enfermedad viral que afecta a los équidos a nivel mundial. El agente causal, pertenece al género Lentivirus, de la familia Retroviridae, subfamilia Orthoretrovirinae. La enfermedad se caracteriza por episodios febriles recurrentes, trombocitopenia, anemia, pérdida de peso y edema de las partes bajas del cuerpo; si no se produce la muerte en el curso de los ataques clínicos agudos, se produce una fase crónica y la enfermedad tiende a convertirse en latente. La AIE debe notificarse ante la OIE: Organización Mundial de Sanidad Animal. En 2015 la OIE mediante Código Sanitario para los Animales Terrestres se estableció a la Anemia Infecciosa Equina en la lista única de enfermedades e infecciones de los équidos. Los veterinarios que detecten un caso de anemia infecciosa equina deben seguir las pautas nacionales y/o locales para la notificación y las pruebas de diagnóstico correspondientes. Este artículo describe los aspectos más relevantes de la Anemia Infecciosa Equina.

Equine Infectious Anemia (EIA) is a viral disease that affects horses worldwide. The causative agent belongs to the genus Lentivirus, the family Retroviridae, subfamily Orthoretrovirinae. The disease is characterized by recurrent episodes of fever, thrombocytopenia, anemia, weight loss and edema of the lower parts of the body; if death does not occur in the course of the acute clinical attacks, a chronic stage occurs and the disease tends to become dormant. The IEA must be reported to the OIE: World Organization for Animal Health. In 2015 by Health Code OIE Terrestrial Animal it was established Equine Infectious Anemia in the single list of diseases and infections of horses. Veterinarians detected a case of equine infectious anemia should follow national and / or local to the notification and guidelines appropriate diagnostic tests. This article describes the most relevant aspects of the Equine Infectious Anemia.

Lack of evidence for human infection with Xenotropic murine leukemia virus-related virus in the Brazilian Amazon basin

Introduction This study confirmed the absence of natural infection with Xenotropic murine leukemia virus-related virus (XMRV) or XMRV-related disease in human populations of the Brazilian Amazon basin. We demonstrated that 803 individuals of both sexes, who were residents of Belem in the Brazilian State of Pará, were not infected with XMRV. Methods Individuals were divided into 4 subgroups: healthy individuals, individuals infected with human immunodeficiency virus, type 1 (HIV-1), individuals infected with human T-lymphotrophic virus, types 1 or 2 (HTLV-1/2), and individuals with prostate cancer. XMRV infection was investigated by nested PCR to detect the viral gag gene and by quantitative PCR to detect pol. Results There was no amplification of either gag or pol segments from XRMV in any of the samples examined. Conclusions This study supports the conclusions of the studies that eventually led to the retraction of the original study reporting the association between XMRV and human diseases. .

Contribution of the Retrovirus Epidemiology Donor Study (REDS) to research on blood transfusion safety in Brazil

The Retrovirus Epidemiology Donor Study (REDS) program was established in the United States in 1989 with the purpose of increasing blood transfusion safety in the context of the HIV/AIDS and human T-lymphotropic virus epidemics. REDS and its successor, REDS-II were at first conducted in the US, then expanded in 2006 to include international partnerships with Brazil and China. In 2011, a third wave of REDS renamed the Recipient Epidemiology and Donor Evaluation Study-III (REDS-III) was launched. This seven-year research program focuses on both blood banking and transfusion medicine research in the United States of America, Brazil, China, and South Africa. The main goal of the international programs is to reduce and prevent the transmission of HIV/AIDS and other known and emerging infectious agents through transfusion, and to address research questions aimed at understanding global issues related to the availability of safe blood. This article describes the contribution of REDS-II to transfusion safety in Brazil. Articles published from 2010 to 2013 are summarized, including database analyses to characterize blood donors, deferral rates, and prevalence, incidence and residual risk of the main blood-borne infections. Specific studies were developed to understand donor motivation, the impact of the deferral questions, risk factors and molecular surveillance among HIV-positive donors, and the natural history of Chagas disease. The purpose of this review is to disseminate the acquired knowledge and briefly summarize the findings of the REDS-II studies conducted in Brazil as well as to introduce the scope of the REDS-III program that is now in progress and will continue through 2018.

Research on construction of sheep lung adenomas virus pEGFP-C1/exJSRV-env and induction of malignant transformation in NIH3T3 / 病毒学报

This study aims to construct a eukaryotic expression system for envelope gene of Jaagsiekte sheep retrovirus, observes its localization in 293T cells, and investigates the potential in inducing malignant transformation of NIH3T3 cells. By RT-PCR, the full-length cDNA of envelope gene of Jaagsiekte sheep retrovirus (exJSRV-env) was amplified from the extract of naturally infected sheep lung. The clone of target gene was sub-cloned into eukaryotic expression system pEGFP-C1, and validated by PCR, restriction endonuclease, and sequencing. Bioinformatic analysis concerning biological function and cellular localiza tion of exJSRV-env was also performed. The recombinant clone of exJSRV-env was transfected into 293T cells and NIH3T3 cells by Lipofectamine LTX. The expression and celluar localization in 293T cells were validated by confocal microscopy. Soft agar colony formation assay was employed to test the anchorage-independent growth of NIH3T3. DNA sequencing and restriction enzyme digestion with Kpn I and Hind III indicated the correct construction of the recombinant plasmid, which was named pEGFP-C1/exJSRV-env. Amino acid sequence alignment of exJSRV-env with reference sequences found 85%-100% homogeneity. A YRNM motif was discovered at the cytoplasmic tail of envelope gene, which is exclusively found in exogenous viruses. Phylogenetic tree analysis showed that our clone of exJSRV-env clustered closely with pathogenic exogenous Jaagsiekte sheep retroviruses. Fluorescence microscopy indicated typical membrane localization of exJSRV-env protein. NIH3T3 cells transfected with exJSRV-env lost contact inhibition, and acquired colony forming ability in soft agar. This study indicated that envelope protein of Jaagsiekte sheep retrovirus can induce malignant transformation of mouse fibroblast cell NIH3T3. Discoveries of this study provide a basis for further structural and functional research on Jaagsiekte sheep retrovirus envelope protein.

Identification of prototype foamy virus Bel1 nuclear localization signal and its corresponding importins / 病毒学报

Bel1, a transactivator of prototype foamy virus (PFV), plays pivotal roles in the replication of PFV. Previous studies have shown that Bel1 bears a nuclear localization signal (NLS), but its amino acid sequence remains unclear and the corresponding importins have not been identified. In this report, we inserted various fragments of Bel1 into an EGFP-GST fusion protein and investigated their subcellular localization by fluorescence microscopy. We found that the 215PRQKRPR221 fragment could direct nuclear localization, which accords with the consensus sequence K(K/R)X(K/R) of monopartite NLS. Point mutation experiments revealed that K218, R219, and R221 are essential for the nuclear localization of Bel1. The results of the GST-pulldown showed that the Bel1 fragment with residues 215-223, which bears the NLS, interacts with KPNA1, KPNA6, and KPNA7. This result suggests that KPNA1, KPNA6, and KPNA7 maybe involved in Bel1 nuclear translocation.

Occurrence of antibodies against Maedi-Visna in Santa Inês sheep in the State of Sergipe, Brazil / Ocorrência de anticorpos contra o virus Maedi-Visna em ovinos Santa Inês, no Estado de Sergipe, Brasil

Small Ruminant Lentiviruses (SRLV) are infectious diseases of viral etiology caused by retroviruses, characterized for being a slowly progressive degenerative disease. The aim of this study was to determine the occcurrence of antibodies against lentivirus in the flock of Santa Inês sheep in Sergipe, Brazil. A minimum number of samples was analyzed by the Astudillo calculation, with an expected prevalence (p) of 10%, error rate (;) of 20% and confidence level of 95% (g = 1.96) obtaining the minimum number of samples (n) of 861. Finally, 941 serum samples were collected, derived from 54 properties and 19 municipalities distributed in three regions of the State, and the number of collected samples was proportional to the sheep flock of each municipality. The serum was placed at -20°C until the Agar Gel Immunodiffusion test (AGID), and results considered as positive or suspicious in AGID were assessed by the Western blotting technique. Out of sampled animals, 194 (20.62%) were male and 747 (79.38%) were female. From the stratification by age, 300 were young sheep (31.88%), aged between six months and one year old, 308 (32.73%) were young adults, aged between 1 and 3 years old, and 333 (35.39%) were estimated to be older than three years old. Results showed that antibodies against the Maedi-Visna virus in the sheep flock occcurred in the State of Sergipe at low frequency (0.11%). Thus, the occcurrence of Maedi-Visna infection in sheep in the State of Sergipe is reported, and emphasizes the participation of the transit of animals in the epidemiology of the disease.

As Lentiviroses de Pequenos Ruminantes (LVPR) são enfermidades infecciosas de etiologia viral causadas por retrovírus, caracterizadas por uma doença de degeneração progressiva e lenta. O objetivo deste estudo foi determinar a ocorrência de anticorpos contra o lentivírus no rebanho ovino Santa Inês, de Sergipe. Para analisar o número mínimo de amostras utilizou-se o cálculo de Astudillo, com prevalência esperada (p) de 10%, margem de erro (;) de 20% e grau de confiança de 95% (g = 1,96), obtendo-se o número mínimo de amostras (n) de 861. Foram colhidas 941 amostras de soro ovino oriundas de 54 propriedades e 19 municípios distribuídos nas três mesorregiões do Estado, sendo o número de amostras proporcional ao efetivo ovino do município. O soro foi acondicionado a -20°C até a realização do teste de Imunodifusão em Gel de Ágar (IDGA). Os resultados considerados positivos ou suspeitos na IDGA foram reavaliados através da técnica de Western blotting. Dos animais amostrados, 194 (20,62%) eram machos e 747 (79,38%) eram fêmeas. Quanto à estratificação por idade, 300 ovinos eram jovens (31,88%), entre seis meses e um ano, 308 (32,73%) eram jovens adultos, entre 1 e 3 anos, e 333 (35,39%) tinham idade estimada superior a 3 anos. Os resultados obtidos demonstraram que anticorpos contra o vírus Maedi-Visna (MVV) ocorrem no rebanho ovino do estado de Sergipe em baixa frequência (0,11%). Assim, relata-se a ocorrência da infecção por Maedi-Visna em ovinos no estado de Sergipe e ressalta-se a participação do trânsito de animais na epidemiologia da doença.

Detection of hemoplasma and Bartonella species and co-infection with retroviruses in cats subjected to a spaying/neutering program in Jaboticabal, SP, Brazil / Detecção de hemoplasmas e Bartonella sp. e co-infecção com retrovírus em gatos submetidos a um programa de castração/esterilização em Jaboticabal, SP, Brasil

Hemotrophic mycoplasmas and Bartonella species are important pathogens that circulate between cats and invertebrate hosts, occasionally causing diseases in humans. Nevertheless, there are few reports on occurrences of these agents in cats in Brazil. The present study aimed to detect the presence of hemoplasma and Bartonella DNA by means of PCR and sequencing. FIV antigens and anti-FeLV antibodies, were studied by using a commercial kit on blood and serum samples, respectively, among 46 cats that were sampled during a spaying/neutering campaign conducted in Jaboticabal, SP. Three (6.5%) cats were positive for hemoplasmas: two (4.3%) for 'Candidatus M. haemominutum' and one (2.2%) for both M. haemofelis and 'Candidatus M. turicensis'. One of the two 'Candidatus M. haemominutum'-infected cats was also positive for FeLV antigens and showed antibodies for FIV. Two cats (4.3%) were positive for B. henselae. One of them was also positive for FeLV antigens. Eight cats (17.4%) were positive for FeLV, and just one (2.2%) showed anti-FIV antibodies. Bartonella species and hemoplasmas associated with infection due to retroviruses can circulate among apparently healthy cats.

Micoplasmas hemotróficos e espécies de Bartonella são importantes patógenos que circulam entre gatos e hospedeiros invertebrados, causando ocasionalmente doenças no homem. Apesar disto, poucos são os estudos acerca da ocorrência destes agentes entre gatos no Brasil. O presente estudo objetivou detectar o DNA de hemoplasmas e Bartonella sp. pela PCR e sequenciamento. Antígeno de FIV e anticorpos anti-FeLV foram estudados utilizando um "kit" comercial, em amostras de sangue e soro, respectivamente, de 46 gatos amostrados em uma campanha de castração em Jaboticabal, SP. Três gatos (6,5%) foram positivos para hemoplasmas: dois (4,3%) para 'Candidatus M. haemominutum' e um (2,2%) para M. haemofelis and 'Candidatus M. turicensis'. Um dos gatos positivos para 'Candidatus M. haemominutum' mostrou-se também positivo na detecção de antígeno de FeLV e de anticorpos para FIV. Dois (4,3%) gatos mostraram-se positivos para B. henselae, sendo que um deles também se mostrou positivo para antígeno de FeLV. Oito gatos (17,4%) foram positivos para FeLV, e apenas um gato mostrou anticorpos anti-FIV. Bartonella sp. e hemoplasmas associados à infecção por retrovírus podem circular entre gatos aparentemente saudáveis.

Relação entre elasticidade arterial e outros marcadores de risco cardiovascular em indivíduos com HIV/aids em terapia antirretroviral / Relationship between arterial elasticity and other markers of cardiovascular risk in individuals with HIV/AIDS on antiretroviral therapy

Introdução: Existe crescente interesse em identificar marcadores de risco para eventos cardiovasculares em pacientes com HIV/aids. Atualmente observa-se alteração do perfil epidemiológico desses pacientes, com diminuição da mortalidade por infecção e comorbidades e aumento por eventos cardiovasculares. A elasticidade arterial, principalmente dos pequenos vasos, tem sido investigada como alteração precoce de evento cardiovascular. Objetivo: Avaliar a relação entre elasticidade arterial e outros indicadores de risco cardiovascular como fatores demográficos e socioeconômicos, hábitos de vida, estado nutricional e marcadores inflamatórios. Métodos: Foram selecionados aleatoriamente 132 indivíduos voluntários em tratamento regular com antirretrovirais em ambulatório especializado em HIV/aids, com idade entre 19 e 59 de ambos os sexos. A elasticidade arterial dos grandes vasos (LAEI) e pequenos vasos (SAEI) foi investigada pelo equipamento HDI/ PulseWaveTM CR-2000 Cardio Vascular Profiling System®. Foram determinados colesterol total e frações, triglicérides, proteína C-reativa, fibrinogênio, medidas antropométricas e de avaliação de composição corporal, fumo, consumo de bebidas alcoólicas, uso de drogas, prática de atividade física, além de avaliação de fatores demográficos e socioeconômicos e imunológicos (carga viral, T-CD4, T-CD8). Para investigar a associação entre LAEI e SAEI e outros fatores de risco cardiovascular utilizou-se análise de regressão linear múltipla

The research progress of foamy virus Bet protein / 病毒学报

Foamy virus can establish lifelong persistent infection in mammal hosts without inducing diseases. Such special characteristic stimulates the interests of researchers. As reported, the accessory protein Bet of foamy virus could regulate the gene expression and infection cycle of foamy virus and take part in the generation of chronic viral infection. And also, Bet might prevent the host cellular defense factor APO-BEC3 from interfering the replication of virus and play a role in maintaining viral persistent infection. In order to elucidate the roles of Bet in the foamy virus replication and infection, this review summarized the research progress of Bet protein reported in recent years.

Establishment and identification of bone morrow specific transgenic mouse model with tumorigenesis by mutant Myc retrovirus infection / 中华血液学杂志

<p><b>OBJECTIVE</b>To establish a novel Myc gene transgenic mouse model for spontaneously forming B-lymphoma and assessing its tumorigenesis potential.</p><p><b>METHODS</b>Freshly isolated hematopoietic progenitor cells served as the target for Myc gene transfer mediated by a retrovirus vector. These cells were engrafted into C57BL/6 mice with (60)Co-gamma ray radiation in advance. Tumor latency was measured and the tumor loaded mice were followed for survival time. Tumor was identified with histology and immunostaining. The exogenous Myc gene was detected by Western blot (in liver, spleen, tumor tissue) and flow cytometry (FCM) \[in bone marrow (BM)\].</p><p><b>RESULTS</b>Mice BM-infected with mutant Myc gene more readily gave rise to B-cell lymphomas than those infected with wild type Myc gene did Myc gene was expressed highly in BM and tumor tissues but not in liver and spleen.</p><p><b>CONCLUSION</b>Our model will be a tool in assessing the transforming potential of Myc mutants and in studying cooperation between Myc and other oncogenes. Mutant Myc is more effective than wild-type Myc in promoting B cell lymphomagenesis in mice.</p>