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2.
Rev Panam Salud Publica ; 45: e100, 2021.
Artigo em Espanhol | MEDLINE | ID: mdl-34539764

RESUMO

OBJECTIVE: To assess coverage and inequalities in maternal and child health interventions among Haitians, Haitian migrants in the Dominican Republic and Dominicans. METHODS: Cross-sectional study using data from nationally representative surveys carried out in Haiti in 2012 and in the Dominican Republic in 2014. Nine indicators were compared: demand for family planning satisfied with modern methods, antenatal care, delivery care (skilled birth attendance), child vaccination (BCG, measles and DPT3), child case management (oral rehydration salts for diarrhea and careseeking for suspected pneumonia), and the composite coverage index. Wealth was measured through an asset-based index, divided into tertiles, and place of residence (urban or rural) was established according to the country definition. RESULTS: Haitians showed the lowest coverage for demand for family planning satisfied with modern methods (44.2%), antenatal care (65.3%), skilled birth attendance (39.5%) and careseeking for suspected pneumonia (37.9%), and the highest for oral rehydration salts for diarrhea (52.9%), whereas Haitian migrants had the lowest coverage in DPT3 (44.1%) and oral rehydration salts for diarrhea (38%) and the highest in careseeking for suspected pneumonia (80.7%). Dominicans presented the highest coverage for most indicators, except oral rehydration salts for diarrhea and careseeking for suspected pneumonia. The composite coverage index was 79.2% for Dominicans, 69.0% for Haitian migrants, and 52.6% for Haitians. Socioeconomic inequalities generally had pro-rich and pro-urban pattern in all analyzed groups. CONCLUSION: Haitian migrants presented higher coverage than Haitians, but lower than Dominicans. Both countries should plan actions and policies to increase coverage and address inequalities of maternal health interventions.


OBJETIVO: Avaliar cobertura e desigualdades nas intervenções em saúde materno-infantil entre os haitianos, migrantes haitianos na República Dominicana e dominicanos. MÉTODOS: Estudo transversal utilizando dados de pesquisas representativas nacionalmente realizadas no Haiti em 2012, e na República Dominicana em 2014. Nove indicadores foram comparados: demanda por planejamento familiar atendida com métodos modernos, atendimento pré-natal, atendimento ao parto (presença de profissional qualificado no parto), vacinação de crianças (BCG, sarampo e DPT3), atendimento de crianças (sais de reidratação oral para diarreia e demanda por assistência por suspeita de pneumonia) e índice composto de cobertura. A riqueza foi medida por meio de índice baseado em recursos, dividido em tercis, e o local de residência (urbano ou rural) foi estabelecido segundo a definição dos países. RESULTADOS: Os haitianos apresentaram a menor cobertura de demanda por planejamento familiar atendida com métodos modernos (44,2%), atendimento pré-natal (65,3%), presença de profissional qualificado no parto (39,5%) e de atendimento por suspeita de pneumonia (37,9%), e a mais alta para sais de reidratação oral na diarreia (52,9%), enquanto os migrantes haitianos tiveram a menor cobertura de DPT3 (44,1%) e sais de reidratação oral para diarreia (38%), e a mais alta na assistência por suspeita de pneumonia (80,7%). Os dominicanos apresentaram a cobertura mais alta para a maioria dos indicadores, exceto para sais de reidratação oral para diarreia e demanda por assistência por suspeita de pneumonia. O índice composto de cobertura foi 79,2% para dominicanos, 69,0% para migrantes haitianos e 52,6% para os haitianos. De forma geral, as desigualdades socioeconômicas apresentaram padrão pró-riqueza e pró-urbano em todos os grupos analisados. CONCLUSÕES: Os migrantes haitianos apresentaram maior cobertura que os haitianos, mas coberturas inferiores aos dominicanos. Ambos os países devem planejar ações e políticas para aumentar a cobertura e abordar as desigualdades nas intervenções em saúde materna.

3.
Artigo em Espanhol | PAHO-IRIS | ID: phr-54757

RESUMO

[RESUMEN]. Objetivo. Evaluar la cobertura y las desigualdades en las intervenciones de salud maternoinfantil entre haitia-nos, migrantes haitianos en la República Dominicana y dominicanos.Métodos. Estudio transversal con datos de encuestas representativas en el nivel nacional realizadas en Haití en el 2012 y en la República Dominicana en el 2014. Se compararon nueve indicadores: la demanda de pla-nificación familiar satisfecha con métodos modernos, la atención prenatal, la atención del parto (por personal de salud calificado), la vacunación infantil (con vacuna con la tuberculosis, el sarampión y tres dosis de la vacuna triple bacteriana), la gestión de casos de enfermedad en la infancia (administración de sales de rehi-dratación oral para la diarrea y búsqueda de atención sanitaria ante la sospecha de neumonía) e índice de cobertura compuesto. La riqueza se midió mediante un índice basado en los activos, dividido en terciles, y el lugar de residencia (urbano o rural) se determinó según la definición del país.Resultados. La población haitiana mostró la menor cobertura respecto de la demanda de planificación fami-liar satisfecha con métodos modernos (44,2%), atención prenatal (65,3%), asistencia calificada en el parto (39,5%) y búsqueda de atención sanitaria ante la sospecha de neumonía (37,9%), y la mayor cobertura respecto de la administración de sales de rehidratación oral para la diarrea (52,9%); los migrantes haitianos presentaron la menor cobertura en DPT3 (44,1%) y la administración de sales de rehidratación oral para la diarrea (38%) y la mayor cobertura en la búsqueda de atención sanitaria ante la sospecha de neumonía (80,7%). La población dominicana presentó la cobertura más alta en la mayoría de los indicadores, excepto en la administración de sales de rehidratación oral para la diarrea y en la búsqueda de atención sanitaria ante la sospecha de neumonía. El índice de cobertura compuesto fue de 79,2% para los dominicanos, 69,0% para los migrantes haitianos y 52,6% para los haitianos. Las desigualdades socioeconómicas tuvieron, en general, un patrón a favor de los ricos y de las zonas urbanas en todos los grupos analizados.Conclusión. Los migrantes haitianos en la República Dominicana presentaron una mayor cobertura que la población haitiana residente en Haití, pero menor que la población dominicana. Ambos países deberían planificar acciones y políticas para aumentar la cobertura y abordar las desigualdades existentes en las inter-venciones de salud materna.


[ABSTRACT]. Objective. To assess coverage and inequalities in maternal and child health interventions among Haitians, Haitian migrants in the Dominican Republic and Dominicans.Methods. Cross-sectional study using data from nationally representative surveys carried out in Haiti in 2012 and in the Dominican Republic in 2014. Nine indicators were compared: demand for family planning satisfied with modern methods, antenatal care, delivery care (skilled birth attendance), child vaccination (BCG, meas-les and DPT3), child case management (oral rehydration salts for diarrhea and careseeking for suspected pneumonia), and the composite coverage index. Wealth was measured through an asset-based index, divided into tertiles, and place of residence (urban or rural) was established according to the country definition.Results. Haitians showed the lowest coverage for demand for family planning satisfied with modern methods (44.2%), antenatal care (65.3%), skilled birth attendance (39.5%) and careseeking for suspected pneumonia (37.9%), and the highest for oral rehydration salts for diarrhea (52.9%), whereas Haitian migrants had the lowest coverage in DPT3 (44.1%) and oral rehydration salts for diarrhea (38%) and the highest in careseeking for suspected pneumonia (80.7%). Dominicans presented the highest coverage for most indicators, except oral rehydration salts for diarrhea and careseeking for suspected pneumonia. The composite coverage index was 79.2% for Dominicans, 69.0% for Haitian migrants, and 52.6% for Haitians. Socioeconomic inequalities generally had pro-rich and pro-urban pattern in all analyzed groups.Conclusion. Haitian migrants presented higher coverage than Haitians, but lower than Dominicans. Both countries should plan actions and policies to increase coverage and address inequalities of maternal health interventions.


[RESUMO]. Objetivo. Avaliar cobertura e desigualdades nas intervenções em saúde materno-infantil entre os haitianos, migrantes haitianos na República Dominicana e dominicanos. Métodos. Estudo transversal utilizando dados de pesquisas representativas nacionalmente realizadas no Haiti em 2012, e na República Dominicana em 2014. Nove indicadores foram comparados: demanda por planejamento familiar atendida com métodos modernos, atendimento pré-natal, atendimento ao parto (pre-sença de profissional qualificado no parto), vacinação de crianças (BCG, sarampo e DPT3), atendimento de crianças (sais de reidratação oral para diarreia e demanda por assistência por suspeita de pneumonia) e índice composto de cobertura. A riqueza foi medida por meio de índice baseado em recursos, dividido em tercis, e o local de residência (urbano ou rural) foi estabelecido segundo a definição dos países. Resultados. Os haitianos apresentaram a menor cobertura de demanda por planejamento familiar atendida com métodos modernos (44,2%), atendimento pré-natal (65,3%), presença de profissional qualificado no parto (39,5%) e de atendimento por suspeita de pneumonia (37,9%), e a mais alta para sais de reidratação oral na diarreia (52,9%), enquanto os migrantes haitianos tiveram a menor cobertura de DPT3 (44,1%) e sais de reidratação oral para diarreia (38%), e a mais alta na assistência por suspeita de pneumonia (80,7%). Os dominicanos apresentaram a cobertura mais alta para a maioria dos indicadores, exceto para sais de reidratação oral para diarreia e demanda por assistência por suspeita de pneumonia. O índice composto de cobertura foi 79,2% para dominicanos, 69,0% para migrantes haitianos e 52,6% para os haitianos. De forma geral, as desigualdades socioeconômicas apresentaram padrão pró-riqueza e pró-urbano em todos os gru-pos analisados. Conclusões. Os migrantes haitianos apresentaram maior cobertura que os haitianos, mas coberturas inferio-res aos dominicanos. Ambos os países devem planejar ações e políticas para aumentar a cobertura e abordar as desigualdades nas intervenções em saúde materna.


Assuntos
Migração Humana , Saúde Materna , Saúde da Criança , Disparidades em Assistência à Saúde , Maternidades , Saúde Materno-Infantil , Serviços de Saúde Materno-Infantil , Haiti , República Dominicana , Migração Humana , Saúde Materna , Saúde da Criança , Saúde Materno-Infantil , Serviços de Saúde Materno-Infantil , Disparidades em Assistência à Saúde , Haiti , República Dominicana , Migração Humana , Saúde Materna , Saúde da Criança , Saúde Materno-Infantil , Serviços de Saúde Materno-Infantil , Disparidades em Assistência à Saúde
4.
Rev Panam Salud Publica ; 44: e144, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33245298

RESUMO

OBJECTIVE: To assess coverage and inequalities in maternal and child health interventions among Haitians, Haitian migrants in the Dominican Republic and Dominicans. METHODS: Cross-sectional study using data from nationally representative surveys carried out in Haiti in 2012 and in the Dominican Republic in 2014. Nine indicators were compared: demand for family planning satisfied with modern methods, antenatal care, delivery care (skilled birth attendance), child vaccination (BCG, measles and DPT3), child case management (oral rehydration salts for diarrhea and careseeking for suspected pneumonia), and the composite coverage index. Wealth was measured through an asset-based index, divided into tertiles, and place of residence (urban or rural) was established according to the country definition. RESULTS: Haitians showed the lowest coverage for demand for family planning satisfied with modern methods (44.2%), antenatal care (65.3%), skilled birth attendance (39.5%) and careseeking for suspected pneumonia (37.9%), and the highest for oral rehydration salts for diarrhea (52.9%), whereas Haitian migrants had the lowest coverage in DPT3 (44.1%) and oral rehydration salts for diarrhea (38%) and the highest in careseeking for suspected pneumonia (80.7%). Dominicans presented the highest coverage for most indicators, except oral rehydration salts for diarrhea and careseeking for suspected pneumonia. The composite coverage index was 79.2% for Dominicans, 69.0% for Haitian migrants, and 52.6% for Haitians. Socioeconomic inequalities generally had pro-rich and pro-urban pattern in all analyzed groups. CONCLUSION: Haitian migrants presented higher coverage than Haitians, but lower than Dominicans. Both countries should plan actions and policies to increase coverage and address inequalities of maternal health interventions.


OBJETIVO: Evaluar la cobertura y las desigualdades en las intervenciones de salud maternoinfantil entre haitianos, migrantes haitianos en la República Dominicana y dominicanos. MÉTODOS: Estudio transversal con datos de encuestas representativas a nivel nacional realizadas en Haití en 2012 y en la República Dominicana en 2014. Se compararon nueve indicadores: demanda de planificación familiar satisfecha con métodos modernos, atención prenatal, atención del parto (por personal de salud calificado), vacunación infantil (BCG, sarampión y DPT3), gestión de casos de enfermedad en la infancia (administración de sales de rehidratación oral para la diarrea y búsqueda de atención sanitaria ante la sospecha de neumonía), e índice de cobertura compuesto. La riqueza se midió mediante un índice basado en los activos, dividido en terciles, y el lugar de residencia (urbano o rural) se determinó según la definición del país. RESULTADOS: La población haitiana mostró la menor cobertura respecto de la demanda de planificación familiar satisfecha con métodos modernos (44,2%), atención prenatal (65,3%), asistencia calificada en el parto (39,5%) y búsqueda de atención sanitaria ante la sospecha de neumonía (37,9%), y la mayor respecto de la administración de sales de rehidratación oral para la diarrea (52,9%); los migrantes haitianos presentaron la menor cobertura en DPT3 (44,1%) y la administración de sales de rehidratación oral para la diarrea (38%) y la mayor en la búsqueda de atención sanitaria ante la sospecha de neumonía (80,7%). La población dominicana presentó la cobertura más alta en la mayoría de los indicadores, excepto en la administración de sales de rehidratación oral para la diarrea y en la búsqueda de atención sanitaria ante la sospecha de neumonía. El índice de cobertura compuesto fue de 79,2% para los dominicanos, 69,0% para los migrantes haitianos y 52,6% para los haitianos. Las desigualdades socioeconómicas generalmente tenían un patrón prorrico y prourbano en todos los grupos analizados. CONCLUSIÓN: Los migrantes haitianos en la República Dominicana presentaron una mayor cobertura que la población haitiana residente en Haití, pero menor que la población dominicana. Ambos países deberían planificar acciones y políticas para aumentar la cobertura y abordar las desigualdades existentes en las intervenciones de salud materna.

5.
Artigo em Inglês | PAHO-IRIS | ID: phr-53012

RESUMO

[ABSTRACT]. Objective. To assess coverage and inequalities in maternal and child health interventions among Haitians, Haitian migrants in the Dominican Republic and Dominicans. Methods. Cross-sectional study using data from nationally representative surveys carried out in Haiti in 2012 and in the Dominican Republic in 2014. Nine indicators were compared: demand for family planning satisfied with modern methods, antenatal care, delivery care (skilled birth attendance), child vaccination (BCG, measles and DPT3), child case management (oral rehydration salts for diarrhea and careseeking for suspected pneumonia), and the composite coverage index. Wealth was measured through an asset-based index, divided into tertiles, and place of residence (urban or rural) was established according to the country definition. Results. Haitians showed the lowest coverage for demand for family planning satisfied with modern methods (44.2%), antenatal care (65.3%), skilled birth attendance (39.5%) and careseeking for suspected pneumonia (37.9%), and the highest for oral rehydration salts for diarrhea (52.9%), whereas Haitian migrants had the lowest coverage in DPT3 (44.1%) and oral rehydration salts for diarrhea (38%) and the highest in careseeking for suspected pneumonia (80.7%). Dominicans presented the highest coverage for most indicators, except oral rehydration salts for diarrhea and careseeking for suspected pneumonia. The composite coverage index was 79.2% for Dominicans, 69.0% for Haitian migrants, and 52.6% for Haitians. Socioeconomic inequalities generally had pro-rich and pro-urban pattern in all analyzed groups. Conclusion. Haitian migrants presented higher coverage than Haitians, but lower than Dominicans. Both countries should plan actions and policies to increase coverage and address inequalities of maternal health interventions.


[RESUMEN]. Objetivo. Evaluar la cobertura y las desigualdades en las intervenciones de salud maternoinfantil entre haitianos, migrantes haitianos en la República Dominicana y dominicanos. Métodos. Estudio transversal con datos de encuestas representativas a nivel nacional realizadas en Haití en 2012 y en la República Dominicana en 2014. Se compararon nueve indicadores: demanda de planificación familiar satisfecha con métodos modernos, atención prenatal, atención del parto (por personal de salud calificado), vacunación infantil (BCG, sarampión y DPT3), gestión de casos de enfermedad en la infancia (administración de sales de rehidratación oral para la diarrea y búsqueda de atención sanitaria ante la sospecha de neumonía), e índice de cobertura compuesto. La riqueza se midió mediante un índice basado en los activos, dividido en terciles, y el lugar de residencia (urbano o rural) se determinó según la definición del país. Resultados. La población haitiana mostró la menor cobertura respecto de la demanda de planificación familiar satisfecha con métodos modernos (44,2%), atención prenatal (65,3%), asistencia calificada en el parto (39,5%) y búsqueda de atención sanitaria ante la sospecha de neumonía (37,9%), y la mayor respecto de la administración de sales de rehidratación oral para la diarrea (52,9%); los migrantes haitianos presentaron la menor cobertura en DPT3 (44,1%) y la administración de sales de rehidratación oral para la diarrea (38%) y la mayor en la búsqueda de atención sanitaria ante la sospecha de neumonía (80,7%). La población dominicana presentó la cobertura más alta en la mayoría de los indicadores, excepto en la administración de sales de rehidratación oral para la diarrea y en la búsqueda de atención sanitaria ante la sospecha de neumonía. El índice de cobertura compuesto fue de 79,2% para los dominicanos, 69,0% para los migrantes haitianos y 52,6% para los haitianos. Las desigualdades socioeconómicas generalmente tenían un patrón prorrico y prourbano en todos los grupos analizados. Conclusión. Los migrantes haitianos en la República Dominicana presentaron una mayor cobertura que la población haitiana residente en Haití, pero menor que la población dominicana. Ambos países deberían planificar acciones y políticas para aumentar la cobertura y abordar las desigualdades existentes en las intervenciones de salud materna.


Assuntos
Migração Humana , Saúde Materna , Saúde da Criança , Disparidades em Assistência à Saúde , Haiti , República Dominicana , Migração Humana , Saúde Materna , Saúde da Criança , Disparidades em Assistência à Saúde , Haiti , República Dominicana
7.
BMC Surg ; 20(1): 105, 2020 May 14.
Artigo em Inglês | MEDLINE | ID: mdl-32410602

RESUMO

BACKGROUND: A daily algorithm for hospital discharge (DAHD) is a key point in the concept of Enhanced Recovery After Surgery (ERAS) protocol. We aimed to evaluate the length of stay (LOS), rate of complications, and hospital costs variances after the introduction of the DAHD compared to the traditional postoperative management of brain tumour patients. METHODS: This is a cohort study with partial retrospective data collection. All consecutive patients who underwent brain tumour resection in 2017 were analysed. Demographics and procedure-related variables, as well as clinical outcomes, LOS and healthcare costs within 30 days after surgery were compared in patients before/pre-implementation and after/post-implementation the DAHD, which included: stable neurological examination; oral feeding without aspiration risk; pain control with oral medications; no intravenous medications. The algorithm was applied every morning and discharge was considered from day 1 after surgery if criteria was fulfilled. The primary outcome (LOS after surgery) analysis was adjusted for the preoperative performance status on a multivariable logistic regression model. RESULTS: A total of 61 patients were studied (pre-implementation 32, post-implementation 29). The baseline demographic characteristics were similar between the groups. After the DAHD implementation, LOS decreased significantly (median 5 versus 3 days; p = 0.001) and the proportion of patients who were discharged on day 1 or 2 after surgery increased (44.8% vs 3.1%; p < 0.001). Major and minor complications rates, readmission rate, and unplanned return to hospital in 30-day follow-up were comparable between the groups. There was a significant reduction in the median costs of hospitalization in DAHD group (US$2135 vs US$2765, p = 0.043), mainly due to a reduction in median ward costs (US$922 vs US$1623, p = 0.009). CONCLUSIONS: Early discharge after brain tumour surgery appears to be safe and inexpensive. The LOS and hospitalization costs were reduced without increasing readmission rate or postoperative complications.


Assuntos
Algoritmos , Neoplasias Encefálicas/cirurgia , Recuperação Pós-Cirúrgica Melhorada , Custos Hospitalares , Tempo de Internação/economia , Alta do Paciente/economia , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Projetos Piloto , Complicações Pós-Operatórias/economia , Estudos Retrospectivos
8.
Cult Health Sex ; 20(1): 40-54, 2018 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-28514927

RESUMO

In this study, we explore how individuals living with HIV in the Dominican Republic strive to live a 'normal' life and the consequences of this pursuit of normalcy. We conducted qualitative in-depth interviews with men (n = 20) and women (n = 20) living with HIV and receiving care at two urban clinics in Santo Domingo. We analysed the data using a combination of narrative analysis and thematic coding. We aimed to identify how fears and/or lived experiences with social rejection and HIV-related stigma and discrimination shaped participants' abilities to maintain social relationships, be economically productive and manage HIV within the context of sexual relationships. Participants used the discourse of una vida normal (a normal life) to frame their response to HIV. This pursuit of normality was driven by the social and economic pressures of living with a chronic condition in a context of HIV-related stigma; trying to keep things 'normal' further added to these pressures. We argue that the normal life discourse fails to recognise the dynamic and complex nature of negotiating this condition and may also create additional burdens for individuals living with HIV that could impact their wellbeing and preventive behaviours.


Assuntos
Infecções por HIV/psicologia , Parceiros Sexuais/psicologia , Estigma Social , Adulto , República Dominicana , Feminino , Infecções por HIV/tratamento farmacológico , Infecções por HIV/transmissão , Humanos , Masculino , Pesquisa Qualitativa
11.
Sex Transm Dis ; 34(1): 15-9, 2007 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-16691157

RESUMO

OBJECTIVES: The objectives of this study were to prioritize applicator design attributes among women in the Dominican Republic and South Africa, and to determine how preferences differed based on sociodemographic variables. GOAL: The goal was to identify acceptable microbicide applicator designs in 2 low-resource settings. STUDY DESIGN: We surveyed 895 women, randomly sampled from clinics in the Dominican Republic (n = 449) and South Africa (n = 446), with questions on sociodemographics, applicator attribute preferences, and price/design tradeoffs. RESULTS: Single-use design was the most valued attribute, and reusable design and low price were the least valued attributes in both populations. Preference for single-use design was associated with concern about reusable applicators spreading germs, secondary or higher education, older age, having children, and perception of moderate to high HIV risk. CONCLUSIONS: Acceptability factors related to microbicide delivery mechanisms should continue to be evaluated among potential microbicide users to directly inform product development and introduction of microbicides.


Assuntos
Anti-Infecciosos/administração & dosagem , Sistemas de Liberação de Medicamentos/instrumentação , Infecções Sexualmente Transmissíveis/epidemiologia , Infecções Sexualmente Transmissíveis/prevenção & controle , Administração Intravaginal , Adulto , República Dominicana/epidemiologia , Feminino , Infecções por HIV/epidemiologia , Infecções por HIV/etiologia , Infecções por HIV/prevenção & controle , Humanos , Satisfação do Paciente , Infecções Sexualmente Transmissíveis/etiologia , Fatores Socioeconômicos , África do Sul/epidemiologia , Inquéritos e Questionários , Saúde da Mulher
13.
Santo Domingo; Instituto de Población y Desarrollo; 1998. 160 p. ilus, tab.
Monografia em Espanhol | LILACS | ID: lil-215825
14.
Santo Domingo; Instituto de Estudios de Población y Desarrollo; 1998. 116 p. ilus.
Monografia em Espanhol | LILACS | ID: lil-215827
15.
Santo Domingo; Asociación Dominicana Pro Bienestar de la Familia; 1997. 22 p.
Monografia em Espanhol | LILACS | ID: lil-215806
16.
Santo Domingo; s.n; 1997. 25 p. ilus.
Monografia em Espanhol | LILACS | ID: lil-215807
17.
Santo Domingo; Asociación Dominicana Pro-Bienestar de la Familia; 1995. 19 p.
Monografia em Espanhol | LILACS | ID: lil-236742
19.
Rev. biol. trop ; Rev. biol. trop;36(2A): 325-8, nov. 1988. ilus
Artigo em Espanhol | LILACS | ID: lil-103739

RESUMO

Ultraestructural studies of different types ofspermatogonia by thin section techiniques and transmission electron microscopy showed that: Cuniculus paca has two types of Type A spermatogonia (A-O and A-1). Samples were taken at different stages of the cycle in the seminiferous tubule epithelium presented a similar pattern as those of other rodents. Type B spermatogonia are similar to those of the rat, the difference being that the heterochromatic zones are larger and more numerous. Both characteristics differentiate them from preleptotenic spermatocytes


Assuntos
Animais , Masculino , Roedores , Espermatogônias/ultraestrutura , Espermatozoides/ultraestrutura , Testículo/ultraestrutura , Microscopia Eletrônica
20.
Rev. biol. trop ; Rev. biol. trop;36(1): 129-37, jun. 1988. ilus
Artigo em Espanhol | LILACS | ID: lil-103732

RESUMO

Se estudió mediante cortes ultrafinos seriados, la ultraestructura del núcleo mitótico en una especie del complejo Leishmania mexicana. Al inicio de la división nuclear, un grupo de seis placas densa se localiza en la región ecuatorial del núcleo y un huso microtubular se forma entre dos polos opuestos. El huso mitótico es completamente intranuclear, con la membrana nuclear presente en todo el proceso de la división. Los huso polares están formados por aproximadamente (zona de superposición) por aproximadamente 100 microtúbulos. No se observó centros organizadores de microtúbulos en relación con el huso. Las placas y hemiplacas apareciaron en asociación con grupos de microtúbulos, que finalizan en ellas o pasan tangencialmente. Esto sugiere que el huso tiene un especial significado en la ffisiologia del desplazamiento de las hemiplacas durante la separación de los genomios. Al inicio del estado de elongación, las placas se dividen en mitades y cada grupo emigra a un polo opuesto. Se concluye que las placas juegan un papel similar a de los cinetocoros y así Leishmania mexicana tendría seis unidades cromosomales. Los eventos mitóticos en esta especie son esencialmente similares a los observados en Trypanosoma cruzi


Assuntos
Animais , Leishmania mexicana/ultraestrutura , Mitose , Fuso Acromático/ultraestrutura
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