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1.
Braz J Biol ; 84: e280817, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39109715

RESUMO

The maize weevil, Sitophilus zeamais Motschulsky, 1855 (Coleoptera: Curculionidae), generally reaches pest status in stored grain. Chemical control is the most used method for population suppression, which can cause adverse impacts, thus creating a need for alternatives such as using inert powders. The present work aims to verify the effect of different concentrations of different types of inert powders on the mortality of S. zeamais in the laboratory. To this end, the experiments were carried out in a completely randomized design, with 13 treatments and four replications, ten adults per replication, where the effect of different inert powders (basalt powder, gypsum powder, and diatomaceous earth) was tested at concentrations of 0.025 g, 0.05 g, 0.1 g and 0.2 g/20 g of corn grains. Variance, normality, and homoscedasticity tests were applied in addition to controlling efficiency (CE%), median lethal time (TL50), and survival curves. All treatments caused mortality in S. zeamais, and all concentrations with diatomaceous earth were more efficient, with 100% mortality at 20 days, followed by the treatment of 0.2 g of gypsum powder/20 g of corn grains, with superior efficiency, to 95% in 20 days and 100% in 30 days. The results indicated that treatments with diatomaceous earth had the highest mortality rate and the best average survival time.


Assuntos
Gorgulhos , Animais , Gorgulhos/classificação , Terra de Diatomáceas , Sulfato de Cálcio , Poeira , Controle de Insetos/métodos , Fatores de Tempo , Distribuição Aleatória , Zea mays/parasitologia
2.
Reproduction ; 156(1): 11-21, 2018 07.
Artigo em Inglês | MEDLINE | ID: mdl-29789440

RESUMO

This work offers researchers the first version of an open-source sperm tracker software (Sperm Motility Tracker, V1.0) containing a novel suit of algorithms to analyze sperm motility using ram and buck sperm as models. The computer-assisted semen analysis is used in several publications with increasing trend worldwide in the last years, showing the importance of objective methodologies to evaluate semen quality. However, commercial systems are costly and versatility is constrained. In the proposed method, segmentation is applied and the tracking stage is performed by using individual Kalman filters and a simplified occlusion handling method. The tracking performance in terms of precision (number of true tracks), the percentage of fragmented paths and percentage of correctly detected particles were manually validated by three experts and compared with the performance of a commercial motility analyzer (Microptic's SCA). The precision obtained with our sperm motility tracker was higher than the one obtained with a commercial software at the current acquisition frame rate of 25 fps (P < 0.0001), concomitantly with a similar percentage of fragmentized tracks (P = 0.0709) at sperm concentrations ranging 25-37 × 106 cells/mL. Moreover, our tracker was able to detect trajectories that were unseen by SCA. Kinetic values obtained by using both methods were contrasted. The higher values found were explained based on the better performance of our sperm tracker to report speed parameters for very fast motile sperm. To standardize results, acquisition conditions are suggested. This open-source sperm tracker software has a good plasticity allowing researchers to upgrade according requirements and to apply the tool for sperm from a variety of species.


Assuntos
Análise do Sêmen/métodos , Motilidade dos Espermatozoides/fisiologia , Animais , Cabras , Masculino , Ovinos , Software , Contagem de Espermatozoides
3.
Artigo em Espanhol | LILACS | ID: biblio-980265

RESUMO

El presente trabajo se inscribe en el Proyecto de investigación 2014-17 Intervenciones de los equipos de orientación escolar: entre la habilitación de los sujetos y la creación de condiciones institucionales que explora y analiza modos de intervención que generan formas democráticas de autoridad al interior de la escuela centrándose en la investigación-acción en la Escuela de Reingreso de Barracas de CABA. Reúne testimonios y modalidades de intervención en torno a tres categorías propuestas a lo largo de la investigación: la primera implica el desplazamiento al "trabajo colaborativo", la segunda el pasaje a una "relación de igualdad en la autoridad" y la tercera se centra en el concepto de "reconfiguración de lo sensible". Dichas categorías permiten reconocer formas democráticas de la autoridad y proponer nuevas maneras de intervención para los equipos de orientación.


This work is part of the UBACyT 2014-17 "Interventions by school counseling teams: between the empowerment of individuals and the creation of institutional conditions" and explores school counseling teams interventions about the construction of authority at school by teachers and the teams themselves. One of the analysis focus of this project is the intervention's modes that generate democratic forms of authority within the school in connection with an enabling intergenerational transmission of subjects in training. The work brings together testimonies and methods of intervention around three categories proposed throughout the investigation: the first involves the displacement to "cooperative work" the second, a passage "the authority relationship in equality" and the third focuses on the research around scenes where "reconfiguration of the sensible" occurs. These categories can recognize democratic forms of authority and propose new ways of intervention teams orientation.


Assuntos
Humanos , Instituições Acadêmicas , Estudantes , Ensino de Recuperação , Escolaridade
4.
Pediatr Dermatol ; 33(2): 178-83, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-26863906

RESUMO

BACKGROUND: Twins have a higher-than-expected risk of infantile hemangiomas (IHs), but the exact reasons for this association are not clear. Comparing concordant and discordant twin pairs might help elucidate these factors and yield more information about IH risk factors. METHODS: A prospective cohort study of twin pairs from 12 pediatric dermatology centers in the United States, Canada, Argentina, and Spain was conducted. Information regarding maternal pregnancy history, family history of vascular birthmarks, zygosity (if known), and pregnancy-related information was collected. Information regarding twins (N = 202 sets) included birthweight, gestational age (GA), presence or absence of IHs, numbers and subtypes of IHs, presence of other birthmarks, and other medical morbidities. RESULTS: Two hundred two sets of twins were enrolled. Concordance for IH was present in 37% of twin pairs. Concordance for IH was inversely related to gestational age (GA), present in 42% of GA of 32 weeks or less, 36% of GA of 33 to 36 weeks, and 32% of GA of 37 weeks or more. Twins of GA of 34 weeks or less were more than two and a half times as likely to be concordant as those of GA of 35 weeks or more (odds ratio (OR) = 2.66, 95% confidence interval (CI) = 1.42-4.99; p < 0.01). In discordant twins, lower birthweight conferred a high risk of IH; of the 64 sets of twins with 10% or greater difference in weight, the smaller twin had IH in 62.5% (n = 40) of cases, versus 37.5% (n = 24) of cases in which the higher-birthweight twin was affected. Zygosity was reported in 188 twin sets (93%). Of these, 78% were dizygotic and 22% monozygotic. There was no statistically significant difference in rates of concordance between monozygotic twins (43%, 18/42) and dizygotic twins (36%, 52/146) (p = 0.50). In multivariate analysis comparing monozygotic and dizygotic twins, adjusting for effects of birthweight and sex, the likelihood of concordance for monozygotic was not appreciably higher than that for dizygotic twins (OR = 1.14, 95% CI = 0.52-2.49). Female sex also influenced concordance, confirming the effects of female sex on IH risk. The female-to-male ratio was 1.7:1 in the entire cohort and 1.9:1 in those with IH. Of the 61 concordant twin sets with known sex of both twins, 41% were female/female, 43% were female/male, and 16% were male/male. CONCLUSIONS: These findings suggest that the origin of IHs is multifactorial and that predisposing factors such as birthweight, sex, and GA may interact with one another such that a threshold is reached for clinical expression.


Assuntos
Doenças em Gêmeos , Hemangioma/genética , Peso ao Nascer , Estudos de Coortes , Feminino , Idade Gestacional , Humanos , Recém-Nascido , Masculino , Gravidez , Estudos Prospectivos , Fatores Sexuais
5.
Artigo em Espanhol | LILACS | ID: biblio-838116

RESUMO

Este trabajo se inscribe en el proyecto UBACyT "Intervenciones de los equipos de orientación escolar: entre la habilitación de los sujetos y la creación de condiciones institucionales", en el marco del cual se investigan intervenciones sobre las trayectorias educativas a fin de sostenerlas y potenciarlas, desde un enfoque contextualista en psicología educacional. Las transformaciones contemporáneas demandan de las escuelas perspectivas teórico-prácticas que habiliten el acompañamiento institucional de las trayectorias. Éstas consideran que la interrupción de una trayectoria educativa refiere menos a la supuesta incapacidad individual y más a la dificultad para quebrar la homogeneización escolar y diversificar esas trayectorias dando respuesta a cada sujeto así como al colectivo institucional. La investigación en proceso, centrada en intervenciones institucionales de equipos de Buenos Aires y Río Negro, analiza la focalización que realizan sobre las condiciones institucionales de las trayectorias educativas y la intervención sobre ellas desde experiencias colectivas.


This article is part of the Ubacyt project "Interventions by school counseling teams: between the enable of the subjects and the creation of institutional conditions" that researches interventions on educational trajectories in order to hold and promote them, from a contextualist approach in educational psychology. Contemporary transformations require schools follow up on educational trajectories with theoretical and practical perspectives. These believe that the interruption of an educational trajectory concerns less the so-called individual disability and more to the dificulty of breaking the school homogenization. The research process, focusing on institutional interventions teams of Buenos Aires and Rio Negro, look into the institutional conditions of educational trajectories and intervention on them from collective experiences.

6.
Artigo em Espanhol | BINACIS | ID: bin-130000

RESUMO

Este artículo propone situarse en el campo de la psicología educacional a fin de analizar escenas y configuraciones de la autoridad en contextos de enseñanza y aprendizaje. En esta perspectiva de análisis se combina la lectura crítica de la filosofía de la emancipación, particularmente de Jacques RanciÞre y de sus categorías conceptuales para explorar y analizar fenómenos educativos concretos, a partir de la construcción de ôescenasö que adquieren visibilidad mediante el ôusoö de las herramientas teóricas que provee el pensamiento de dicho autor. El ôanudamiento inédito entre universal y particularesö, la ôinterrupción de un orden sucesivo de causas y efectos naturalizadosö, la ôproducción de nuevos significados y de lo sensible en un sentido igualitarioö, creando ôun mundo dentro de otro mundoö hace trabajar a la psicología educacional en torno a una autoridad que guarda la asimetría que la caracteriza aunque sosteniendo con firmeza la igualdad como principio.(AU)


Assuntos
Humanos , Psicologia Educacional , Aprendizagem , Ensino , Escolaridade , Política
7.
Artigo em Espanhol | LILACS | ID: lil-722401

RESUMO

Este artículo propone situarse en el campo de la psicología educacional a fin de analizar escenas y configuraciones de la autoridad en contextos de enseñanza y aprendizaje. En esta perspectiva de análisis se combina la lectura crítica de la filosofía de la emancipación, particularmente de Jacques Rancière y de sus categorías conceptuales para explorar y analizar fenómenos educativos concretos, a partir de la construcción de “escenas” que adquieren visibilidad mediante el “uso” de las herramientas teóricas que provee el pensamiento de dicho autor. El “anudamiento inédito entre universal y particulares”, la “interrupción de un orden sucesivo de causas y efectos naturalizados”, la “producción de nuevos significados y de lo sensible en un sentido igualitario”, creando “un mundo dentro de otro mundo” hace trabajar a la psicología educacional en torno a una autoridad que guarda la asimetría que la caracteriza aunque sosteniendo con firmeza la igualdad como principio.


Assuntos
Humanos , Aprendizagem , Psicologia Educacional , Ensino , Escolaridade , Política
8.
Int J Food Microbiol ; 154(3): 187-91, 2012 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-22285534

RESUMO

Blueberries are traditionally consumed in North America, some European countries and Japan. In Argentina, the blueberry crop is profitable because production starts in November, when the northern hemisphere lacks fresh fruit. Fungal contaminants can grow and produce mycotoxins in fresh fruit. The aims of this work were to identify the main genera of the mycobiota of blueberries grown in Argentina and to determine the toxicogenic potential, pathogenicity and host specificity of the species isolated. The genus Alternaria was the main component of the blueberry mycobiota (95%); minor proportions of Phoma spp. (4%) and Penicillium spp. (1%) were also isolated. According to their sporulation patterns, 127 Alternaria isolates belonged to the Alternaria tenuissima species-group, 5 to the Alternaria alternata species-group and 2 to the Alternaria arborescens species-group. The last mentioned species-group was not isolated at 5°C. Of the 134 isolates, 61% were toxicogenic in autoclaved rice; 97% of these produced alternariol (AOH) in a range from 0.14 to 119.18 mg/kg, 95% produced alternariol methylether (AME) in a range from 1.23 to 901.74 mg/kg and 65% produced tenuazonic acid (TA) in a range from 0.13 to 2778 mg/kg. Fifty two isolates co-produced the three mycotoxins. According to the size of the lesion that they caused on blueberries, the isolates were classified as slightly pathogenic, moderately pathogenic and very pathogenic. No significant differences in pathogenicity were found on different blueberry varieties. In this work, high incidence and toxicogenic potential of the Alternaria isolates from blueberries were demonstrated. Thus, more studies should be done to evaluate the health risk posed by the presence of the Alternaria toxins in blueberries and in the manufactured by-products.


Assuntos
Alternaria/patogenicidade , Mirtilos Azuis (Planta)/microbiologia , Micotoxinas/biossíntese , Alternaria/isolamento & purificação , Argentina , Armazenamento de Alimentos
10.
AIDS Care ; 19 Suppl 1: S12-22, 2007.
Artigo em Inglês | MEDLINE | ID: mdl-17364383

RESUMO

In Brazil in the last decade there has been an increase in the susceptibility of young women to HIV. This study explored the link between autonomy, or control over major domains of economic, social and sexual life, and susceptibility to HIV infection among poor young women living in an urban slum area of Brazil. A cross-sectional survey was carried out on a random sample of 356 young women between 15 and 24 years old. The study found that indicators of autonomy that relate to sexuality, mobility and freedom from threat by partners were significantly correlated with practices linked to HIV prevention and with access to health services promoting prevention, especially among adolescents. Young women who talked to their partner about condom use before first intercourse and co-decided with them on condom use were more likely to use condoms. In contrast, those who had ever been victim of physical violence by a partner or whose partners restricted their mobility were less likely to use condoms. The study found that young women were more likely to have accessed health services for gynaecological examinations, family planning services and HIV testing if they had ever been pregnant. The findings indicate that structural gender inequalities translate into unequal relationships and reduced autonomy, increasing young women's susceptibility to HIV. A bias in HIV testing and reproductive health services towards pregnant women leaves many susceptible youth without early access. The study suggests the development of a reproductive health policy that ensures that young women access services before they get pregnant and that also reaches young males.


Assuntos
Infecções por HIV/epidemiologia , Autonomia Pessoal , Áreas de Pobreza , Adolescente , Adulto , Brasil/epidemiologia , Preservativos/estatística & dados numéricos , Estudos Transversais , Suscetibilidade a Doenças/epidemiologia , Feminino , Acessibilidade aos Serviços de Saúde/estatística & dados numéricos , Humanos , Sexo Seguro/estatística & dados numéricos , Fatores Socioeconômicos
11.
Medicina (B.Aires) ; Medicina (B.Aires);66(4): 332-334, 2006. ilus
Artigo em Espanhol | BINACIS | ID: bin-123209

RESUMO

Intracraneal manifestations of Hodgkins Disease (HD) are extremely rare, with an estimated incidence rate of approximately 0.5%. They can be classified as: 1) treatment-related leucoencephalopathy, 2) central nervous system infections, 3) paraneoplasic syndromes and 4) intracraneal lymphomas, which could be sub-classified into intraparenchymal or intradural masses. We describe a case of a 40 year-old male with mixed cellularity type HD who developed neurological manifestations as relapsed disease. Magnetic resonance imaging suggested leptomeningeal metastases and atypical cells were found in cerebrospinal fluid. The patient died from progressive disease refractory to third line chemotherapy. There are less than 50 similar cases reported in the literature. We review the clinical features and differential diagnosis of leptomeningeal metastases in Hodgkins disease.(AU)


Assuntos
Adulto , Humanos , Masculino , Doença de Hodgkin/patologia , Neoplasias Meníngeas/secundário , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Biópsia por Agulha , Bleomicina/administração & dosagem , Cisplatino/administração & dosagem , Ciclofosfamida/administração & dosagem , Citarabina/administração & dosagem , Dacarbazina/administração & dosagem , Diagnóstico Diferencial , Doxorrubicina/administração & dosagem , Etoposídeo/administração & dosagem , Evolução Fatal , Doença de Hodgkin/líquido cefalorraquidiano , Doença de Hodgkin/tratamento farmacológico , Leucoencefalopatia Multifocal Progressiva/induzido quimicamente , Leucoencefalopatia Multifocal Progressiva/patologia , Imageamento por Ressonância Magnética , Neoplasias Meníngeas/líquido cefalorraquidiano , Síndromes Paraneoplásicas/patologia , Prednisona/administração & dosagem , Procarbazina/administração & dosagem , Recidiva , Vimblastina/administração & dosagem , Vincristina/administração & dosagem
12.
Medicina (B.Aires) ; Medicina (B.Aires);66(4): 332-334, 2006. ilus
Artigo em Espanhol | BINACIS | ID: bin-119215

RESUMO

Intracraneal manifestations of Hodgkins Disease (HD) are extremely rare, with an estimated incidence rate of approximately 0.5%. They can be classified as: 1) treatment-related leucoencephalopathy, 2) central nervous system infections, 3) paraneoplasic syndromes and 4) intracraneal lymphomas, which could be sub-classified into intraparenchymal or intradural masses. We describe a case of a 40 year-old male with mixed cellularity type HD who developed neurological manifestations as relapsed disease. Magnetic resonance imaging suggested leptomeningeal metastases and atypical cells were found in cerebrospinal fluid. The patient died from progressive disease refractory to third line chemotherapy. There are less than 50 similar cases reported in the literature. We review the clinical features and differential diagnosis of leptomeningeal metastases in Hodgkins disease.(AU)


Assuntos
Adulto , Humanos , Masculino , Doença de Hodgkin/patologia , Neoplasias Meníngeas/secundário , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Biópsia por Agulha , Bleomicina/administração & dosagem , Cisplatino/administração & dosagem , Ciclofosfamida/administração & dosagem , Citarabina/administração & dosagem , Dacarbazina/administração & dosagem , Diagnóstico Diferencial , Doxorrubicina/administração & dosagem , Etoposídeo/administração & dosagem , Evolução Fatal , Doença de Hodgkin/líquido cefalorraquidiano , Doença de Hodgkin/tratamento farmacológico , Leucoencefalopatia Multifocal Progressiva/induzido quimicamente , Leucoencefalopatia Multifocal Progressiva/patologia , Imageamento por Ressonância Magnética , Neoplasias Meníngeas/líquido cefalorraquidiano , Síndromes Paraneoplásicas/patologia , Prednisona/administração & dosagem , Procarbazina/administração & dosagem , Recidiva , Vimblastina/administração & dosagem , Vincristina/administração & dosagem
13.
Medicina (B.Aires) ; Medicina (B.Aires);66(4): 332-334, 2006. ilus
Artigo em Espanhol | LILACS | ID: lil-449012

RESUMO

Intracraneal manifestations of Hodgkin's Disease (HD) are extremely rare, with an estimated incidence rate of approximately 0.5%. They can be classified as: 1) treatment-related leucoencephalopathy, 2) central nervous system infections, 3) paraneoplasic syndromes and 4) intracraneal lymphomas, which could be sub-classified into intraparenchymal or intradural masses. We describe a case of a 40 year-old male with mixed cellularity type HD who developed neurological manifestations as relapsed disease. Magnetic resonance imaging suggested leptomeningeal metastases and atypical cells were found in cerebrospinal fluid. The patient died from progressive disease refractory to third line chemotherapy. There are less than 50 similar cases reported in the literature. We review the clinical features and differential diagnosis of leptomeningeal metastases in Hodgkin's disease.


Assuntos
Adulto , Humanos , Masculino , Doença de Hodgkin/patologia , Neoplasias Meníngeas/secundário , Biópsia por Agulha , Bleomicina/administração & dosagem , Ciclofosfamida/administração & dosagem , Cisplatino/administração & dosagem , Citarabina/administração & dosagem , Diagnóstico Diferencial , Dacarbazina/administração & dosagem , Doença de Hodgkin/líquido cefalorraquidiano , Doença de Hodgkin/tratamento farmacológico , Doxorrubicina/administração & dosagem , Etoposídeo/administração & dosagem , Evolução Fatal , Leucoencefalopatia Multifocal Progressiva/induzido quimicamente , Leucoencefalopatia Multifocal Progressiva/patologia , Imageamento por Ressonância Magnética , Neoplasias Meníngeas/líquido cefalorraquidiano , Prednisona/administração & dosagem , Procarbazina/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Recidiva , Síndromes Paraneoplásicas/patologia , Vimblastina/administração & dosagem , Vincristina/administração & dosagem
14.
Braz. j. biol ; Braz. j. biol;62(3)Aug. 2002.
Artigo em Inglês | LILACS-Express | LILACS, VETINDEX | ID: biblio-1467635

RESUMO

This paper deals with variations in biomass and in the production of Eichhornia crassipes (water hyacinth) in a eutrophic tropical reservoir. Net production was assessed by both a traditional method and a demographic approach. The initial biomass ranges from 96 g DW.m-2 to a maximum of 2027 g DW.m-2. Net production estimates varied greatly according to which method was used to calculate them (traditional: 20.6 ton DW.hectare-1.year-1, demographic: 226.9 ton DW.year-1).


Este estudo mostra as variações da biomassa e da produção de Eichhornia crassipes em um reservatório eutrófico tropical. A produção líquida foi estimada por intermédio do método tradicional e do demográfico. A biomassa inicial de 96 g PS.m-2chegou ao máximo de 2.027 g PS.m-2 A produção líquida variou de acordo com o método utilizado para sua estimativa (tradicional: 20,6 ton PS. ha-1.ano-1, demográfico: 226,9 ton PS.ano-1).

15.
Braz. j. biol ; Braz. j. biol;62(3): 463-471, Aug. 2002. tab, graf
Artigo em Inglês | LILACS | ID: lil-326218

RESUMO

This paper deals with variations in biomass and in the production of Eichhornia crassipes (water hyacinth) in a eutrophic tropical reservoir. Net production was assessed by both a traditional method and a demographic approach. The initial biomass ranges from 96 g DW.m-2 to a maximum of 2027 g DW.m-2. Net production estimates varied greatly according to which method was used to calculate them (traditional: 20.6 ton DW.hectare-1.year-1, demographic: 226.9 ton DW.year-1)


Assuntos
Biomassa , Eichhornia , Eutrofização , Brasil , Água Doce , Densidade Demográfica , Estações do Ano
16.
Braz J Biol ; 62(3): 463-71, 2002 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-12530183

RESUMO

This paper deals with variations in biomass and in the production of Eichhornia crassipes (water hyacinth) in a eutrophic tropical reservoir. Net production was assessed by both a traditional method and a demographic approach. The initial biomass ranges from 96 g DW.m-2 to a maximum of 2027 g DW.m-2. Net production estimates varied greatly according to which method was used to calculate them (traditional: 20.6 ton DW.hectare-1.year-1, demographic: 226.9 ton DW.year-1).


Assuntos
Biomassa , Eichhornia/crescimento & desenvolvimento , Eutrofização , Brasil , Água Doce , Densidade Demográfica , Estações do Ano
17.
Braz. J. Biol. ; 62(3)2002.
Artigo em Inglês | VETINDEX | ID: vti-445721

RESUMO

This paper deals with variations in biomass and in the production of Eichhornia crassipes (water hyacinth) in a eutrophic tropical reservoir. Net production was assessed by both a traditional method and a demographic approach. The initial biomass ranges from 96 g DW.m-2 to a maximum of 2027 g DW.m-2. Net production estimates varied greatly according to which method was used to calculate them (traditional: 20.6 ton DW.hectare-1.year-1, demographic: 226.9 ton DW.year-1).


Este estudo mostra as variações da biomassa e da produção de Eichhornia crassipes em um reservatório eutrófico tropical. A produção líquida foi estimada por intermédio do método tradicional e do demográfico. A biomassa inicial de 96 g PS.m-2chegou ao máximo de 2.027 g PS.m-2 A produção líquida variou de acordo com o método utilizado para sua estimativa (tradicional: 20,6 ton PS. ha-1.ano-1, demográfico: 226,9 ton PS.ano-1).

18.
J Acquir Immune Defic Syndr ; 25(2): 182-7, 2000 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-11103049

RESUMO

BACKGROUND AND OBJECTIVES: Project Horizonte, an open cohort of homosexual and bisexual HIV-1-negative men, is a component of the Minas Gerais AIDS Vaccine Program of the Federal University of Minas Gerais, Belo Horizonte, Brazil. Its objectives included the evaluation of seroincidence of HIV, to ascertain the role of counseling on behavior modification and to assess their willingness to participate in future HIV vaccine trials. METHODS: Various means of recruitment were used, including pamphlets, notices in community newspapers, radio, and television, at anonymous testing centers, and by word of mouth. RESULTS: From October 1994 to May 1999, 470 volunteers were enrolled. Their mean age was 26 years and over 70% of them had high school or college education. During the follow-up, they were seen every 6 months, when they received counseling and condoms, and when HIV testing was done. Eighteen seroconversions were observed, and the incidence rates estimates were 1.75 per 100 and 1.99 per 100 person-years, for 36 and 48 months of follow-up, respectively. During the entire period, 139 volunteers were lost to follow-up. Among them, 59 (42.4%) never returned after the initial visit and 51 (36.7) came only once after their initial visit. No losses were observed for those observed during follow-up for more than 3 years. At enrollment, 50% of participants said they would participate in a vaccine trial, and 30% said they might participate. CONCLUSIONS: The results obtained up to this moment confirm the feasibility of following this type of cohort for an extended period, estimating HIV incidence rate, and evaluating counseling for safe sexual practices in preparation for clinical trials with candidate HIV vaccines in Brazil.


Assuntos
Bissexualidade , Ensaios Clínicos como Assunto/métodos , Infecções por HIV/epidemiologia , HIV-1 , Homossexualidade , Projetos de Pesquisa , Adulto , Brasil/epidemiologia , Estudos de Coortes , Demografia , Infecções por HIV/prevenção & controle , Soronegatividade para HIV , Humanos , Entrevistas como Assunto , Masculino , Estudos Multicêntricos como Assunto , Seleção de Pacientes , Estudos Prospectivos
19.
Mem. Inst. Oswaldo Cruz ; 95(6): 783-5, Nov.-Dec. 2000. tab
Artigo em Inglês | LILACS | ID: lil-273431

RESUMO

Sexually transmitted diseases (STD) are very frequent in the whole world. Males who do not use a condom during their sexual relations are at great risk. We report cases of STD during six months of observation, among homosexual/bisexual males who participate in the Project Horizonte. There were 16 cases of genital warts, 6 cases of human immunodeficiency virus infection, 24 cases of unspecific urethritis, 28 cases of herpes simplex virus infection, 30 cases of syphilis, 58 cases of gonorrhea and 84 cases of pediculosis. We concluded that a condom must be used in all sexual relations and new counseling techniques are needed, to avoid this situation


Assuntos
Humanos , Masculino , Adolescente , Adulto , Pessoa de Meia-Idade , Bissexualidade , Soronegatividade para HIV , Homossexualidade Masculina , Infecções Sexualmente Transmissíveis/epidemiologia , Brasil/epidemiologia , Preservativos , Incidência , Prevalência , Estudos Prospectivos
20.
Mem Inst Oswaldo Cruz ; 95(6): 783-5, 2000.
Artigo em Inglês | MEDLINE | ID: mdl-11080761

RESUMO

Sexually transmitted diseases (STD) are very frequent in the whole world. Males who do not use a condom during their sexual relations are at great risk. We report cases of STD during six months of observation, among homosexual/bisexual males who participate in the Project Horizonte. There were 16 cases of genital warts, 6 cases of human immunodeficiency virus infection, 24 cases of unspecific urethritis, 28 cases of herpes simplex virus infection, 30 cases of syphilis, 58 cases of gonorrhea and 84 cases of pediculosis. We concluded that a condom must be used in all sexual relations and new counseling techniques are needed, to avoid this situation.


Assuntos
Bissexualidade , Soronegatividade para HIV , Homossexualidade Masculina , Infecções Sexualmente Transmissíveis/epidemiologia , Adolescente , Adulto , Brasil/epidemiologia , Humanos , Incidência , Masculino , Pessoa de Meia-Idade , Prevalência , Estudos Prospectivos
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