Serological profiles and evaluation of parasitaemia by PCR and blood culture in individuals chronically infected by Trypanosoma cruzi treated with benzonidazole.

OBJECTIVE: To evaluate the serological and parasitological status of patients with chronic Chagas disease (CD) after chemotherapy with benzonidazole. METHODS: Retrospective study of patients treated with benzonidazole (5 mg/kg/day for 60 days) between 1980 and 2010. Twenty-nine patients who had CD confirmed by two reagent immunological tests and/or one positive xenodiagnosis before treatment were included. Conventional serology (ELISA and IIF) and parasitological tests (haemoculture and N-PCR) were performed. RESULTS: At the time of treatment, the mean age of patients was 36 ± 7.24 years (20-39 years) and the time post-treatment varied from 1 to 29 years. After chemotherapy, all individuals had reagent ELISA and 93.1% had positive results for the IIF test. T. cruzi DNA was detected by N-PCR in 48.3%. Negative results were observed in 41.4% and inconclusive ones in 10.3%. Haemoculture was negative for all individuals. CONCLUSIONS: Our results suggest that N-PCR may be useful in the early identification of therapeutic failure of CD. Although it is difficult to determine parasitological cure in negative N-PCR cases, we can infer that this condition represents a declination of parasitaemia as a favourable consequence of aetiological treatment.

Evidence of Chagas disease in seronegative Brazilian patients with megaesophagus.

BACKGROUND: After 100 years of research, Chagas disease (CD) remains an important public health problem in Latin America. The symptomatic chronic phase is usually characterized by cardiac or digestive involvement and diagnosis currently relies on the measurement of Trypanosoma cruzi-specific antibodies produced in response to the infection. However, the detection of parasite DNA in seronegative persons has been reported. METHODS: The prevalence of CD in a population with esophageal disorders was assessed by conventional serology. We also detected T. cruzi DNA in blood samples of seronegative and inconclusive patients by nested polymerase chain reaction (N-PCR). RESULTS: The seroprevalence of CD determined by conventional serologic tests (indirect immunofluorescence (IIF) and enzyme-linked immunosorbent assay (ELISA)) was 79% in 513 patients with esophageal disorders. Out of 41 blood samples, N-PCR was positive in 31 (76%) cases for which serology was negative or inconclusive. CONCLUSIONS: As all patients presented with clinical signs suggestive of the digestive form of CD and most of them were born in endemic areas, we highlight the importance of improving diagnosis of the disease and the implications for blood bank screening. Our data suggest that N-PCR is effective in the detection of T. cruzi DNA in patients with inconclusive or negative serology, and it may eventually be useful in the determination of the etiology of megaesophagus.

Determining the C-reactive protein level in patients with different clinical forms of chagas disease.

Chagas disease is caused by Trypanosoma cruzi and remains a health problem in the developing countries of South America. The condition leads to cardiac conduction disturbances and chronic heart failure. In this study, 136 individuals were evaluated by the Chagas Disease Study Group of the Hospital de la Universidad Estatal de Campinas in Brazil to determine the relationship between chronic heart failure and the serum C-reactive protein (CRP) level. When patients were stratified according to the different clinical presentations of Chagas disease, it was found that the CRP levels in those with severe heart disease and non-Chagasic cardiopathy were significantly higher than in controls or those with mild heart disease (P< .05), even when participants were stratified by age (i.e. <40 and > or =40 years). There was a direct linear correlation between age and CRP level, such that the older the individual, the higher the CRP level. These data provide further evidence for an association between chronic inflammation and the development of heart failure. Although CRP elevations are not exclusively related to Chagas disease, the CRP level may be a useful marker for the progression of Chagas disease to a more advanced phase.

Determinación de la concentración plasmática de proteína C reactiva en pacientes con diferentes formas clínicas de la enfermedad de Chagas / Determining the C-reactive protein level in patients with different clinical forms of Chagas disease

La enfermedad de Chagas (EC) es una infección causada por Trypanosoma cruzi que aún hoy constituye un problema de salud en los países en desarrollo de Sudamérica y causa trastornos de la conducción e insuficiencia cardiaca crónica. En este trabajo, el Grupo de Estudios de Enfermedad de Chagas del Hospital de la Universidad Estatal de Campinas ha analizado a 136 individuos para investigar la relación entre insuficiencia cardiaca crónica y concentración sérica de proteína C reactiva (PCR). La PCR estratificada según diferentes apariciones clínicas de la EC reveló que los pacientes con cardiopatía grave y cardiopatía no chagásica tenían estadísticamente concentraciones de PCR mayores que los otros grupos de control y cardiopatía leve (p < 0,05), incluso estratificando por edad ( < 40 y ≥ 40 años). Hubo una correlación lineal positiva entre edad y PCR, de manera que cuanto mayores los individuos, más altos los valores de PCR. Estos datos refuerzan la asociación entre inflamación crónica y aparición de insuficiencia cardiaca. Aunque la elevaciones de PCR no están exclusivamente relacionadas con la EC, serían un marcador asequible de la evolución de la EC hacia fases avanzadas (AU)

Chagas disease is caused by Trypanosoma cruzi and remains a health problem in the developing countries of South America. The condition leads to cardiac conduction disturbances and chronic heart failure. In this study, 136 individuals were evaluated by the Chagas Disease Study Group of the Hospital de la Universidad Estatal de Campinas in Brazil to determine the relationship between chronic heart failure and the serum C-reactive protein (CRP) level. When patients were stratified according to the different clinical presentations of Chagas disease, it was found that the CRP levels in those with severe heart disease and non-Chagasic cardiopathy were significantly higher than in controls or those with mild heart disease (P < .05), even when participants were stratified by age (i.e. <40 and 8805 40 years there was a direct linear correlation between age crp level such that the older individual higher these data provide further evidence for an association chronic inflammation development of heart failure although elevations are not exclusively related to chagas disease may be useful marker progression more advanced phase (AU)

[Relationship between subjective well-being and the functionality of elderly outpatients]. / Relações entre o bem-estar subjetivo e a funcionalidade em idosos em seguimento ambulatorial.

OBJECTIVE: The aim of this study was to investigate the relationship between subjective well-being, functional independence and lower-limb performance (muscle strength, gait velocity and balance) among elderly people undergoing outpatient follow-up, stratified by sex and age groups. METHODS: We evaluated 125 elderly people, aged 60 years and over, who received care at a geriatric outpatient clinic. The instruments used were: 1) Functional Independence Measure (FIM) to evaluate functional dependence; 2) Short Physical Performance Battery (SPPB) to measure physical performance; and 3) Subjective Well-Being (SWB) with questions about health and satisfaction with life. RESULTS: A convenience sample was used, with predominance of females (who had greater functional impairment). The Spearman correlation coefficients for subjective well-being and the performance tests varied from -0.16 to 0.31 for men and -0.09 to 0.29 for women, therefore there were no differences between the sexes. However, the older participants had a higher level of satisfaction than the younger participants. Perceived health was also more satisfactory among the older participants, however comparative perceived health was better among the elderly participants with moderate to good physical performance. CONCLUSION: The results suggest that older individuals have greater satisfaction with life and better perceived health. Moreover, good physical performance was an important variable for better perceived health when compared to other people.

Chagas' disease and HIV co-infection in patients without effective antiretroviral therapy: prevalence, clinical presentation and natural history.

The objectives of this study were to establish the prevalence of Chagas' disease among HIV seropositive patients and to define the clinical profile of co-infected cases. Cross-sectional study: the prevalence of co-infected subjects was 1.3% and there was no significant difference between co-infected and non co-infected patients relative to race, birthplace, home address and CD4 T cells. The co-infected group comprised predominantly women and mean age and median viral load were higher. Longitudinal study: included 20 patients (12 women) and described the clinical presentation and natural history of concomitant infections. The mean follow-up time was 35.8 months, mean age was 43+/-8.7 years and 60% of patients were white. During the follow-up, a total of 113 serological tests for Chagas' disease were performed: 89 (78.8%) were reactive/positive, 21 (18.6%) were doubtful and three (2.6%) were non-reactive/negative. Positive results for xenodiagnosis were high (81%). At the baseline evaluation, thirteen patients had the indeterminate form of Chagas' disease and seven cardiopathy. One patient developed from indeterminate to digestive form, three had a reactivation of Chagas' disease in the central nervous system, all had parasitological confirmation and received specific treatment. There were 11 deaths. Thus, HIV-infected patients should be tested for Chagas' disease when epidemiologically relevant.

Relações entre o bem-estar subjetivo e a funcionalidade em idosos em seguimento ambulatorial / Relationship between subjective well-being and the functionality of elderly outpatients

OBJETIVO: Este estudo teve como objetivo verificar a relação entre o bem-estar subjetivo, independência funcional e desempenho de membros inferiores (força muscular, velocidade de marcha e equilíbrio) de idosos em seguimento ambulatorial, em relação ao sexo e a grupos etários. MÉTODOS: Foram avaliados 125 idosos de ambos os sexos com idade mínima de 60 anos, atendidos em um ambulatório de geriatria. Os instrumentos utilizados foram: 1) Medida da Independência Funcional (MIF) para avaliar a dependência funcional; 2) Short Physical Performance Battery (SPPB) para medir o desempenho físico; 3) Bem-Estar Subjetivo (BES): questões sobre a saúde e satisfação com a vida. RESULTADOS: A amostra utilizada foi de conveniência, com predomínio do sexo feminino, que apresentou maior comprometimento funcional. As correlações do bem-estar subjetivo com o teste de desempenho não demonstraram diferenças entre os sexos, contudo os idosos mais velhos apresentaram maior nível de satisfação que os idosos mais jovens. A saúde percebida também foi mais satisfatória entre os idosos mais velhos. Entretanto, a saúde percebida comparada mostrou melhores resultados nos idosos com moderado a bom desempenho físico. CONCLUSÃO: Os resultados sugerem que indivíduos mais velhos apresentam maior satisfação com a vida e melhor saúde percebida. Além disso, o bom desempenho físico foi uma variável de relevância para melhor saúde percebida quando comparada a outras pessoas.

OBJECTIVE: The aim of this study was to investigate the relationship between subjective well-being, functional independence and lower-limb performance (muscle strength, gait velocity and balance) among elderly people undergoing outpatient follow-up, stratified by sex and age groups. METHODS: We evaluated 125 elderly people, aged 60 years and over, who received care at a geriatric outpatient clinic. The instruments used were: 1) Functional Independence Measure (FIM) to evaluate functional dependence; 2) Short Physical Performance Battery (SPPB) to measure physical performance; and 3) Subjective Well-Being (SWB) with questions about health and satisfaction with life. RESULTS: A convenience sample was used, with predominance of females (who had greater functional impairment). The Spearman correlation coefficients for subjective well-being and the performance tests varied from -0.16 to 0.31 for men and -0.09 to 0.29 for women, therefore there were no differences between the sexes. However, the older participants had a higher level of satisfaction than the younger participants. Perceived health was also more satisfactory among the older participants, however comparative perceived health was better among the elderly participants with moderate to good physical performance. CONCLUSION: The results suggest that older individuals have greater satisfaction with life and better perceived health. Moreover, good physical performance was an important variable for better perceived health when compared to other people.

Comparação entre idosos que sofreram quedas segundo desempenho físico e número de ocorrências / Physical performance and number of falls in older adult fallers

Objetivos: Analisar, entre idosos com ocorrência de quedas, a relação entre as variáveis sociodemográficas, clínicas, físicas e funcionais segundo as variáveis critério desempenho físico e número de quedas. MÉTODOS: Estudo transversal com 72 idosos (76,3±8,3 anos) que sofreram quedas no último ano, sendo 65,3 por cento mulheres, atendidos no ambulatório de geriatria de um hospital universitário de Campinas, SP. Os idosos foram divididos em grupo com pior (PDF) e grupo com melhor desempenho físico (MDF), e em grupo com uma queda (1Q) e grupo com duas quedas ou mais (2Q). As características sociodemográficas, clínicas, físicas e funcionais foram as variáveis independentes do estudo. Foi realizada análise de comparação entre os grupos. RESULTADOS: Os idosos do grupo PDF tiveram maior faixa etária, maior número de doenças e menor independência na maior parte das tarefas da dimensão motora em relação ao grupo MDF. Os idosos do grupo 2Q apresentaram maior número de doenças, menor força de preensão manual e menor independência na tarefa "controle das fezes" na dimensão motora da medida de independência funcional (MIF) em relação ao grupo 1Q. CONCLUSÕES: Entre idosos que já caíram, piores níveis de desempenho físico relacionam-se com maior faixa etária, mais doenças e menos independência funcional. Além disso, ter sofrido quedas recorrentes relaciona-se com mais doenças, menos força muscular e menos independência funcional na tarefa de controle de fezes.

Objectives: The aim of this study was to determine the relationship between sociodemographic, clinical, physical and functional data according to physical performance and number of falls among older fallers. METHODS: Cross-sectional study carried out among 72 older adults (76.3 ±8.3 years) with a history of falls in the past year, 65.3 percent of which were women. The participants received care at the geriatric outpatient clinic of a university hospital in Campinas, SP. They were divided into the following groups: worst physical performance (WPP) and best physical performance (BPP), one-time fallers (1F) and frequent fallers (2F). Sociodemographic, clinical, physical and functional characteristics were considered as independent variables. Comparison analysis between the groups was conducted. RESULTS: The WPP group was older and had a higher number of illnesses and less independence in most motor dimension tasks compared to the BPP group. The 2F group had a higher number of illnesses, less handgrip strength and less independence in the bowel management task in the motor dimension of the Functional Independence Measure (FIM) compared to the 1F group. CONCLUSIONS: Among older adults fallers, poor physical performance is associated with more advanced age, more illnesses and less functional independence. Moreover, recurrent falls are associated with more illnesses, less muscle strength and less functional independence in the bowel management task.

Impact of long-term administration of amiodarone on the thyroid function of patients with Chagas' disease.

The effect of long-term treatment with amiodarone on patients with Chagas' disease has seldom been reported. This nonrandomized observational study attempted to analyze the follow-up of patients with Chagas' disease regarding their clinical evolution, thyroid dysfunction, and goiter. We compared 72 patients with long-term use (11 +/- 5 years) of amiodarone, including 22 patients who developed goiter, to 33 patients who did not use amiodarone, followed-up for 2 to 20 years (7 +/- 11 years). Follow-up of 72 patients for 9 +/- 5.4 years with periodic cardiac and thyroid function evaluations showed that only 26 maintained normal serum thyrotropin (TSH) levels; 24 presented with elevated levels; 4 had low levels, and 18 patients presented with fluctuations of TSH level. Among the 22 patients with goiter, only 3 (14%) patients maintained normal TSH, 8 (36%) had elevated TSH, 2 (9%) had low TSH, and 9 (41%) patients presented with fluctuating serum TSH levels. Most individuals remained clinically euthyroid with no evidence of cardiac impairment that could be attributed to thyroid dysfunction and the arrhythmias were adequately controlled by amiodarone. We suggest that amiodarone treatment may be continued for patients with Chagas' disease with arrhythmias, even in those who develop thyroid function abnormalities or goiter.

Differential regulation of lymphoproliferative responses to Trypanosoma cruzi antigen in patients with the cardiac or indeterminate form of Chagas disease.

In the search to identify differences in the immunological response between patients with the indeterminate or cardiac form of Chagas disease, trypomastigote-specific peripheral blood mononuclear cell (PBMC) proliferative responses were studied. Suppression of lymphoproliferation occurred in both groups of patients, being more intense in those with the cardiac form. By adding to the cultures neutralizing mAbs anti-IFN-gamma, anti-IL-4, anti-IL-13, or anti-IL-10, indomethacin to block prostaglandin synthesis, NMMA as inhibitor of nitric oxide (NO) synthesis, or glutathione-peroxidase as H(2)O(2) scavenger, it was found that indomethacin augmented lymphoproliferation in both groups of patients. However, anti-IL-10 treatment increased proliferation only in PBMC cultures from patients with the cardiac form, indicating that in these patients, IL-10 was suppressing the immune response. These patients also had higher IL-10 levels in unstimulated cultures and higher PGE(2) levels in stimulated cultures. The results evidence that IL-10 regulates parasite-specific T cell responses in patients with the cardiac form, whereas regulation by prostaglandins (PG) occurs in patients with either cardiac or indeterminate form of the disease.

Serum cytokines in chronic Chagas' disease

Estudamos os níveis séricos da lL-2, IFN-gama e do TNF-alfa de portadores da doença de Chagas em suas diferentes formas clínicas, compensados e descompensados. As citocinas medidas nos 91 pacientes com a forma crônica da doença näo diferiram dos níveis de 13 indivíduos controle. Näo houve diferença estatística entre os 17 portadores da forma indeterminada da doença e os portadores de cardiopatia insipiente (n = 4), de cardiopatia bem estabelecida (n = 62), da forma digestiva (n = 4) ou da forma mista (n = 4) da doença. Os níveis séricos de TNF foram indetectáveis e IFN-gama näo diferiu nas diferentes formas clínicas ou com a severidade da doença. No entanto, encontramos níveis mais elevados de IL-2 nos 25 pacientes näo-contrololados do que nos 66 pacientes bem compensados (p < 0,001). Sugerimos que a dosagem de IL-2 possa servir como indicadora da necessidade de terapêuticas mais agressivas nestes pacientes