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1.
J Adv Nurs ; 77(12): 4827-4835, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-34331371

RESUMO

AIMS: To explore the experiences of care for pregnant and birthing people, and the nurses who cared for them, during the COVID-19 pandemic, with special emphasis on the impact of visitor restrictions policies. DESIGN: Qualitative study using critical thematic analysis. METHODS: We conducted semi-structured interviews with 15 community members who were pregnant and/or gave birth and 14 nurses who worked in the perinatal setting between April and August 2020. Participants were recruited via purposive and snowball sampling, and interviews were conducted virtually via the Zoom platform. The research team used critical thematic analysis methods informed by other interpretive methodologies to arrive at resultant themes. RESULTS: Participants described experiences pertaining to how visitor restriction policies are not equitable and disproportionately impact Black, Indigenous, and People of Color (BIPOC) families, and the direct impacts of not having support people, and also provided recommendations for how to adapt current policies to be more equitable. CONCLUSIONS: Visitor restriction policies have had a disproportionately harmful effect on BIPOC patients and families, leading some patients to make decisions that increase their physical risks to alleviate their risk of labouring and birthing without desired support. IMPACT: While this pandemic is nearing the end, these results can guide structuring of policy not only for the next pandemic, but also for universal policy development. Mitigating the effects of racism in policies, by including diverse stakeholders in decision-making, should be an inherent part of hospital administration procedures.


Assuntos
COVID-19 , Pandemias , Cor , Feminino , Humanos , Políticas , Gravidez , SARS-CoV-2
2.
Glob Qual Nurs Res ; 8: 23333936211006397, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33869668

RESUMO

The COVID-19 pandemic created a massive shift in health care systems, including within pregnancy and birth care. To explore how experiences of pregnancy and birth were impacted, 15 patient participants and 14 nurse participants were interviewed and transcripts analyzed using critical thematic analysis. Patients highlighted how adaptations to care were inadequate to meet their needs, a desire for support in response to stress, and the impact of COVID on patients' experiences. Nurses identified how inconsistencies in policies impacted nurses' ability to care for patients, the impact on nurses from hospital actions, and the impact on patients from hospital actions. Both groups discussed how system changes had disparate impacts on marginalized communities, leading to racially-biased care. This pandemic will continue to have lasting impact on pregnant and birthing families, and the nurses who care for them, and it is imperative that hospitals examine their role and any potential impacts.

3.
Neurochirurgie ; 66(4): 219-224, 2020 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-32540341

RESUMO

PURPOSE: In the general context of medical judicialization, spine surgeons are impacted by the part that medical responsibility and the risk of malpractice play in their actions and decisions. Our aim was to evaluate possible shifts in practices among private neurosurgeons who are highly exposed to this judicial risk and detect alterations in their pleasure in exercising their profession. We present the first national survey on French physicians' perception of surgical judicialization and consequences on their practice. METHODS: An online survey was submitted to the 121 members of the French Society of Private Neurosurgery, who represent 29.1% of the total number of spine surgeons and perform 36.0% of the national total spine surgery activity. The French law (no-fault out-of-court scheme) significantly impacts these surgeons in the event of litigation. RESULTS: A total of 78 surveys were completed (64.5% response rate): 89.7% of respondents experienced alteration of doctor-patient relationship related to judicialization and 60.2% had already refused to perform risky surgeries. Fear of being sued added negative pressure during surgery for 55.1% of respondents and 37.2% of them had already considered stopping their practice because of this litigation context. CONCLUSION: The increasing impact of medical liability is prompting practitioners to change their practice and perceptions. The doctor-patient relationship appears to be altered, negative pressure is placed on physicians and defensively, some neurosurgeons may refuse high-risk patients and procedures. This situation causes professional disenchantment and can ultimately prove disadvantageous for both doctors and patients.


Assuntos
Seguro de Responsabilidade Civil/estatística & dados numéricos , Imperícia/legislação & jurisprudência , Neurocirurgiões/estatística & dados numéricos , Coluna Vertebral/cirurgia , Adulto , Idoso , Medicina Defensiva , Feminino , França , Humanos , Satisfação no Emprego , Legislação Médica , Responsabilidade Legal , Masculino , Pessoa de Meia-Idade , Neurocirurgiões/economia , Relações Médico-Paciente , Inquéritos e Questionários
4.
Artigo em Inglês | MEDLINE | ID: mdl-28145105

RESUMO

This qualitative study evaluates a decision aid that includes the benefits and harms of breast cancer screening and analyses women's perception of the information received and healthcare professionals' perceptions of the convenience of providing it. Seven focus groups of women aged 40-69 years (n = 39) and two groups of healthcare professionals (n = 23) were conducted in Catalonia and the Canary Islands. The focus groups consisted of guided discussions regarding decision-making about breast cancer screening, and acceptability and feasibility of the decision aid. A content analysis was performed. Women positively value receiving information regarding the benefits and harms of breast cancer screening. Several women had difficulties understanding some concepts, especially those regarding overdiagnosis. Women preferred to share the decisions on screening with healthcare professionals. The professionals noted the lack of inclusion of some harms and benefits in the decision aid, and proposed improving the clarity of the statistical information. The information on overdiagnosis generates confusion among women and controversy among professionals. Faced with the new information presented by the decision aid, the majority of women prefer shared decision-making; however, its feasibility might be limited by a lack of knowledge and attitudes of rejection from healthcare professionals.


Assuntos
Neoplasias da Mama/diagnóstico , Técnicas de Apoio para a Decisão , Adulto , Idoso , Atitude do Pessoal de Saúde , Atitude Frente a Saúde , Neoplasias da Mama/psicologia , Compreensão , Detecção Precoce de Câncer/psicologia , Estudos de Viabilidade , Feminino , Grupos Focais , Humanos , Programas de Rastreamento/psicologia , Pessoa de Meia-Idade , Percepção , Espanha
5.
Adv Parasitol ; 95: 213-314, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28131364

RESUMO

The genus Echinococcus is composed of eight generally recognized species and one genotypic cluster (Echinococcus canadensis cluster) that may in future be resolved into one to three species. For each species, we review existing information on transmission routes and life cycles in different geographical contexts and - where available - include basic biological information of parasites and hosts (e.g., susceptibility of host species). While some Echinococcus spp. are transmitted in life cycles that involve predominantly domestic animals (e.g., dog - livestock cycles), others are wildlife parasites that do or do not interact with domestic transmission. In many cases, life cycle patterns of the same parasite species differ according to geography. Simple life cycles contrast with transmission patterns that are highly complex, involving multihost systems that may include both domestic and wild mammals. Wildlife transmission may be primary or secondary, i.e., resulting from spillovers from domestic animals. For most of the species and regions, existing information does not yet permit a conclusive description of transmission systems. Such data, however, would be highly relevant, e.g., for anticipation of geographical changes of the presence and frequency of these parasites in a warming world, or for initiating evidence-based control strategies.


Assuntos
Animais Domésticos , Doenças do Cão/parasitologia , Equinococose/parasitologia , Echinococcus/fisiologia , Estágios do Ciclo de Vida , Gado , Animais , Doenças do Cão/epidemiologia , Doenças do Cão/transmissão , Cães , Equinococose/epidemiologia , Equinococose/transmissão , Echinococcus/crescimento & desenvolvimento , Ecologia , Geografia , Humanos
6.
Parasitology ; 144(4): 450-458, 2017 04.
Artigo em Inglês | MEDLINE | ID: mdl-27938426

RESUMO

The zoonotic cestode Echinococcus ortleppi (Lopez-Neyra and Soler Planas, 1943) is mainly transmitted between dogs and cattle. It occurs worldwide but is only found sporadically in most regions, with the notable exception of parts of southern Africa and South America. Its epidemiology is little understood and the extent of intraspecific variability is unknown. We have analysed in the present study the genetic diversity among 178 E. ortleppi isolates from sub-Saharan Africa, Europe and South America using the complete mitochondrial cox1 (1608 bp) and nad1 (894 bp) DNA sequences. Genetic polymorphism within the loci revealed 15 cox1 and six nad1 haplotypes, respectively, and 20 haplotypes of the concatenated genes. Presence of most haplotypes was correlated to geographical regions, and only one haplotype had a wider spread in both eastern and southern Africa. Intraspecific microvariance was low in comparison with Echinococcus granulosus sensu stricto, despite the wide geographic range of examined isolates. In addition, the various sub-populations showed only subtle deviation from neutrality and were mostly genetically differentiated. This is the first insight into the population genetics of the enigmatic cattle adapted Echinococcus ortleppi. It, therefore, provides baseline data for biogeographical comparison among E. ortleppi endemic regions and for tracing its translocation paths.


Assuntos
DNA de Helmintos/genética , Echinococcus/genética , Polimorfismo Genético , Animais , DNA Mitocondrial/genética , Haplótipos
7.
Stat Med ; 35(28): 5267-5282, 2016 12 10.
Artigo em Inglês | MEDLINE | ID: mdl-27523800

RESUMO

We propose a joint model to analyze the structure and intensity of the association between longitudinal measurements of an ordinal marker and time to a relevant event. The longitudinal process is defined in terms of a proportional-odds cumulative logit model. Time-to-event is modeled through a left-truncated proportional-hazards model, which incorporates information of the longitudinal marker as well as baseline covariates. Both longitudinal and survival processes are connected by means of a common vector of random effects. General inferences are discussed under the Bayesian approach and include the posterior distribution of the probabilities associated to each longitudinal category and the assessment of the impact of the baseline covariates and the longitudinal marker on the hazard function. The flexibility provided by the joint model makes possible to dynamically estimate individual event-free probabilities and predict future longitudinal marker values. The model is applied to the assessment of breast cancer risk in women attending a population-based screening program. The longitudinal ordinal marker is mammographic breast density measured with the Breast Imaging Reporting and Data System (BI-RADS) scale in biennial screening exams. © 2016 The Authors. Statistics in Medicine Published by John Wiley & Sons Ltd.


Assuntos
Teorema de Bayes , Neoplasias da Mama/epidemiologia , Mama , Densidade da Mama , Feminino , Humanos , Medição de Risco/métodos
8.
Neurochirurgie ; 61(1): 38-42, 2015 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-25596972

RESUMO

STUDY DESIGN: Case report and review of the literature. OBJECTIVE: To prevent and manage a suspected iatrogenic vertebral artery injury during a cervical spine anterior approach. SUMMARY OF BACKGROUND DATA: The anterior spine approach is a common surgery with few complications. One of the rare but significant risks is vertebral artery injury. Consequences of vertebral artery injuries are often delayed. Therefore, it is essential to prevent this complication and to know how when exploring after a suspected vertebral artery injury. METHODS: Report of a case and review of the literature. A 61-year-old woman presented with a cervical schwannoma involving the C5-C6 foramen. She had undergone surgery 22 years before by the posterior approach. We performed an anterior cervical approach. After 12 days, a vertebral artery pseudo-aneurysm occurred. Our review of the literature is focalized on vertebral artery injuries during cervical surgery by the anterior approach. RESULTS: The patient was treated by coil embolization with a good outcome. To our knowledge, only 6 cases of vertebral artery pseudo-aneurysm after surgery have been reported in the literature. CONCLUSION: According to the literature, vertebral artery pseudo-aneurysms resulting in anterior cervical approach are rare but their consequences could be severe. Prevention begins by detailed surgical planning. Peroperative imaging is helpful. Any suspected vertebral artery injury should postpone a contralateral approach before angiographic imaging.


Assuntos
Falso Aneurisma/etiologia , Falso Aneurisma/prevenção & controle , Procedimentos Endovasculares/efeitos adversos , Neurilemoma/cirurgia , Complicações Pós-Operatórias/prevenção & controle , Neoplasias da Coluna Vertebral/cirurgia , Artéria Vertebral , Adulto , Falso Aneurisma/terapia , Vértebras Cervicais/cirurgia , Embolização Terapêutica , Feminino , Humanos , Complicações Pós-Operatórias/terapia
9.
Neurochirurgie ; 60(5): 222-6, 2014 Oct.
Artigo em Francês | MEDLINE | ID: mdl-24856315

RESUMO

Subarachnoid hemorrhage (SAH) is a sudden and potentially severe event with mortality rates ranging between 24 and 30 % depending on the initial clinical condition. Studies have attempted to assess the possible influence of meteorological parameters on the occurrence of SAH. However, this idea remains very controversial and the results vary widely from one study to another. Our study is the second largest French series, and first performed in a homogeneous series of patients. The aim of our study was to attempt to establish a relationship between the weather (i.e.) temperature variations and daily variations of atmospheric pressure in the days before the onset of SAH and the same day and the occurrence of non-traumatic SAH in a homogeneous population of 236 patients from a single center, over a period of 7 years (2002 to 2008). This retrospective study does not suggest any relationship between the occurrence of SAH and meteorological data studied. Moreover, no relationship was observed between mean changes in temperature or pressure and the occurrence of SAH, that the day of the bleeding or the days preceding the SAH. However, a female predominance was observed and a relatively high mortality rate of 18.3 %. The distribution of the occurrence of an SAH was random. As it seems impossible to provide logistics and organization of care for non-traumatic SAH, the care system must remain vigilant throughout the year.


Assuntos
Aneurisma Intracraniano/complicações , Hemorragia Subaracnóidea/mortalidade , Adulto , Idoso , Feminino , França , Humanos , Masculino , Pessoa de Meia-Idade , Assistência ao Paciente , Estudos Retrospectivos , Fatores de Risco , Caracteres Sexuais , Hemorragia Subaracnóidea/complicações , Fatores de Tempo
10.
Vet Parasitol ; 202(3-4): 335-8, 2014 May 28.
Artigo em Inglês | MEDLINE | ID: mdl-24566128

RESUMO

The cystic echinococcosis (CE) is an important zoonotic disease caused by the parasite Echinococcus spp. In Brazil, this parasite is present in Rio Grande do Sul (RS) state, border with Argentina and Uruguay, causing several damages to human and animal health. This study aimed to identify Echinococcus spp. in hydatid cysts of swine and evaluate the similarity of the genotypes through the phylogenetic analysis. A total of 3,101,992 swine were slaughtered in the central/northern region of RS/Brazil, during 2008-2012. Five isolates were characterized as hydatid cyst by molecular analysis, based on the mitochondrial gene cytochrome c oxidase subunit I (cox-I). The genotypes E. granulosus sensu stricto (G1) (n=2) and E. canadensis (G7) (n=3) were identified in the hydatid cysts. The swine represents a potential intermediate host for different genotypes of Echinococcus spp., besides it can contribute to the perpetuation of the parasite's life cycle in rural areas.


Assuntos
Equinococose/veterinária , Echinococcus granulosus/fisiologia , Echinococcus/fisiologia , Doenças dos Suínos/parasitologia , Animais , Brasil , Equinococose/parasitologia , Echinococcus/classificação , Echinococcus/genética , Echinococcus granulosus/classificação , Echinococcus granulosus/genética , Complexo IV da Cadeia de Transporte de Elétrons/genética , Genótipo , Interações Hospedeiro-Parasita , Dados de Sequência Molecular , Filogenia , Suínos
11.
Breast Cancer Res Treat ; 138(3): 869-77, 2013 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-23471648

RESUMO

BACKGROUND: There is little information on the individual risk of screen-detected cancer in women over successive participations. This study aimed to estimate the 10-year cumulative breast cancer detection risk (ductal carcinoma in situ and invasive carcinoma) in a population-based breast cancer screening program according to distinct protocol strategies. A further aim was to determine which strategies maximized the cancer detection risk and how this risk was affected by the radiologic protocol variables. METHODS: Data were drawn from a retrospective cohort of women from nine population-based screening programs in Spain from 1990 to 2006. We used logistic regression with discrete intervals to estimate the cumulative detection risk at 10 years of follow-up according to radiologic variables and protocol strategies. RESULTS: In women starting screening at the age of 45-59 years, the cumulative risk of screen-detected cancer at 10 years ranged from 11.11 to 16.71 per 1,000 participants according to the protocol strategy. The cumulative detection risk for overall cancer and invasive cancer was the highest with strategies using digital mammography, double reading, and two projections (16.71 and 12.07 ‰, respectively). For ductal carcinoma in situ, cumulative detection risk was the highest with strategies using screen-film, double reading, and two projections (2.32 ‰). The risk was the lowest with strategies using screen-film mammography, single reading, and two projections. CONCLUSIONS: This study found that at least eleven cancers are detected per 1,000 women screened in the first 10 years of follow-up. Enhanced knowledge of the variability in cumulative risk of screen-detected cancer could improve protocol strategies.


Assuntos
Neoplasias da Mama/diagnóstico por imagem , Carcinoma Intraductal não Infiltrante/diagnóstico , Mamografia/métodos , Idoso , Neoplasias da Mama/epidemiologia , Neoplasias da Mama/patologia , Carcinoma Intraductal não Infiltrante/epidemiologia , Estudos de Coortes , Detecção Precoce de Câncer/métodos , Feminino , Humanos , Modelos Logísticos , Programas de Rastreamento/métodos , Pessoa de Meia-Idade , Modelos Estatísticos , Estudos Retrospectivos , Espanha/epidemiologia
12.
Neurochirurgie ; 59(6): 221-3, 2013 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-24475495

RESUMO

Occipital condylar fractures (OCFs) are rare and difficult to diagnose. The routine use of computed tomography (CT) scan in traumatology has however now made their diagnosis easier, with an estimated frequency of 4 to 19% of craniospinal traumatized patients and 0.4 to 0.7% of all severe traumatized patients in emergencies. This paper describes a patient who was not diagnosed with OCF during his first hospitalization after a road accident. However, 15 days later a left sided hypoglossal nerve palsy occurred. In this case report, we underline that an examination of the cranial nerve is a quick and easy procedure to screen each head trauma patient for occipital foramen fractures. Also, careful attention must be paid to X-Rays, CT scans and magnetic resonance imaging of the craniocervical junction.


Assuntos
Doenças do Nervo Hipoglosso/terapia , Osso Occipital/lesões , Osso Occipital/patologia , Fraturas Cranianas/patologia , Acidentes , Humanos , Doenças do Nervo Hipoglosso/diagnóstico , Doenças do Nervo Hipoglosso/etiologia , Doenças do Nervo Hipoglosso/patologia , Imageamento por Ressonância Magnética/métodos , Masculino , Fraturas Cranianas/complicações , Fraturas Cranianas/diagnóstico , Fraturas Cranianas/terapia
13.
Breast ; 21(5): 646-51, 2012 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-22340960

RESUMO

INTRODUCTION: The aim of this study was to describe breast ductal carcinoma in situ (DCIS) incidence trends in women in the Girona province during a period of 25 years. The influence of age, use of mammography and implementation of the breast cancer screening programs was explored. Incidence of subsequent invasive breast cancers (IBC) and DCIS treatment was also considered. MATERIALS AND METHODS: Cases diagnosed with primary pure DCIS (n = 416) during 1983-2007 were extracted from the population-based Girona Cancer Registry. The estimated annual percent change was estimated using joinpoint analysis. RESULTS: DCIS incidence showed a sharp rise until 1997, followed by a less marked upward trend. Among women aged 50-69 the increase was particularly important between 1992 and in 1996, reflecting the spread in mammography use. CONCLUSION: The upward trend of DCIS was mainly related to an increase in mammography use either opportunistic or as a result of screening implementation.


Assuntos
Neoplasias da Mama/epidemiologia , Carcinoma Intraductal não Infiltrante/epidemiologia , Adulto , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Neoplasias da Mama/diagnóstico por imagem , Carcinoma Ductal de Mama/diagnóstico por imagem , Carcinoma Ductal de Mama/epidemiologia , Carcinoma Intraductal não Infiltrante/diagnóstico por imagem , Detecção Precoce de Câncer/estatística & dados numéricos , Detecção Precoce de Câncer/tendências , Feminino , Humanos , Incidência , Modelos Lineares , Mamografia/estatística & dados numéricos , Mamografia/tendências , Pessoa de Meia-Idade , Sistema de Registros , Espanha/epidemiologia
14.
Eur Psychiatry ; 27(7): 477-82, 2012 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-21570261

RESUMO

BACKGROUND: Raised rates of psychoses among ethnic minorities have been reported. Exposure to antipsychotic medications can give information on mental illness management and ethnic-related differences. OBJECTIVE: To compare exposure to antipsychotic medications in immigrant and native-born populations in Spain. METHOD: Descriptive cross-sectional study of the dispensation of antipsychotic medications to the population aged 15 to 64years, in a Spanish Health Region during 2008. RESULTS: 1.9% of the native-born population was exposed to antipsychotic medications as compared to 0.4% of the immigrant population. Native-born women were exposed from 1.8 to 5.3 times more and native-born men from 3.6 to 6.3 times more than immigrants of the same gender. The least exposed were persons from Eastern Europe and men from sub-Saharan Africa. Active ingredients prescribed were similar between the two groups. Of the immigrant group, 15.7% were admitted to a psychiatric ward as compared to 6.4% of the native-born population. In the former, non-specific diagnoses were predominant. CONCLUSIONS: All immigrant groups had lower exposure to antipsychotic medications, were admitted to inpatient care more often and had less specific diagnoses. Both diagnostic processes and adherence to treatment need improvement in the regional immigrant population.


Assuntos
Antipsicóticos/uso terapêutico , Emigrantes e Imigrantes , Transtornos Psicóticos/tratamento farmacológico , Esquizofrenia/tratamento farmacológico , Adolescente , Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Espanha , Adulto Jovem
17.
An. pediatr. (2003, Ed. impr.) ; 74(1): 38-41, ene. 2011. tab
Artigo em Espanhol | IBECS | ID: ibc-90249

RESUMO

El objetivo de este trabajo ha sido comparar dos pautas de tratamiento con dexametasona en el tratamiento de la meningitis neumocócica: una pauta corta de 48h y una larga de 96h. Estudio retrospectivo en el que se comparan dos pautas de tratamiento con dexametasona en una serie de 18 casos de meningitis neumocócica. Se observa una mayor duración de la fiebre primaria en el grupo que recibe la pauta corta de dexametasona estadísticamente significativa sin diferencias en cuanto al desarrollo de fiebre secundaria y en la evolución a muerte y/o secuelas neurológicas graves. Se concluye que no existen diferencias importantes entre las dos pautas de tratamiento y en la necesidad de desarrollar marcadores de mala evolución y nuevos tratamientos adyuvantes para mejorar el pronóstico de la enfermedad (AU)


Our aim was two compare two different dexamethasone administration schedules in pneumococcal meningitis: short course (48h) and long course (96h) treatment. We diagnosed 18 pneumococcal meningitis treated with the two different schedules. We found a statistically significant longer duration of primary fever in patients who received dexamethasone for two days. We found no differences in the appearance of secondary fever, or in the development of severe neurological handicaps, or death between the two groups. We conclude that they are no significant differences between the two treatment schedules and that there is a need for developing early prognostic markers and adjuvant therapies that improve the outcome of patients with pneumococcal meningitis (AU)


Assuntos
Humanos , /tratamento farmacológico , Dexametasona/administração & dosagem , Estudos Retrospectivos , Febre/epidemiologia , Quimioterapia Adjuvante , Infecções Pneumocócicas/tratamento farmacológico
18.
An Pediatr (Barc) ; 74(1): 38-41, 2011 Jan.
Artigo em Espanhol | MEDLINE | ID: mdl-20888310

RESUMO

Our aim was two compare two different dexamethasone administration schedules in pneumococcal meningitis: short course (48h) and long course (96h) treatment. We diagnosed 18 pneumococcal meningitis treated with the two different schedules. We found a statistically significant longer duration of primary fever in patients who received dexamethasone for two days. We found no differences in the appearance of secondary fever, or in the development of severe neurological handicaps, or death between the two groups. We conclude that they are no significant differences between the two treatment schedules and that there is a need for developing early prognostic markers and adjuvant therapies that improve the outcome of patients with pneumococcal meningitis.


Assuntos
Anti-Inflamatórios/administração & dosagem , Dexametasona/administração & dosagem , Meningite Pneumocócica/tratamento farmacológico , Criança , Pré-Escolar , Esquema de Medicação , Feminino , Humanos , Lactente , Masculino , Estudos Retrospectivos
19.
Parasitology ; 138(3): 298-302, 2011 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-20880421

RESUMO

Selfing has been considered the most common mode of reproduction in Echinococcus flatworms. However, population genetic studies on the asexual larval stage involving nuclear co-dominant markers have not always revealed significant heterozygote deficiencies--the expected outcome of a regularly and highly inbred population. In this study, we analysed the genetic structure of Echinococcus granulosus sensu lato populations from Southern Brazil during their adult (sexual) stage using 1 mitochondrial and 1 nuclear marker (cox 1 and mdh, respectively). We show that parasite genetic differentiation is largest among definitive hosts (domestic dogs) from different farms, suggesting that transmission is mostly maintained within a farm. Moreover, we show that heterozygote deficiencies are not significant, and we suggest that outbreeding is the most common mode of reproduction of the parasite in that region.


Assuntos
Cruzamentos Genéticos , Echinococcus granulosus/genética , Echinococcus granulosus/fisiologia , Animais , Bovinos , Cães , Genótipo , Endogamia , Malato Desidrogenase/genética , Reprodução/genética , Ovinos/parasitologia
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