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1.
J Genet Couns ; 2024 Sep 15.
Artículo en Inglés | MEDLINE | ID: mdl-39279161

RESUMEN

As of 2022, 89% of genetic counselors report being White, and 93% report being women. We examined diversity in genetic counseling (GC) program admission committees (ACs-who are responsible for deciding who will make up the future GC workforce) and student cohorts to understand the impact of recent diversification efforts, and where future work should be focused. One representative from each AC of the 57 accredited GC programs in North America in 2022 was invited to participate in a cross-sectional survey to provide information on the diversity of GC ACs and student cohorts between 2019 and 2022 for the following dimensions: race/ethnicity, gender, sexual orientation, disability status, neurodiversity, and rural or low socioeconomic status backgrounds. Members of 38/57 (67%) ACs participated. Using the Cochran-Armitage test for trends, significant increases were observed for the proportion of individuals of a racial/ethnic minority within ACs (from 9% in 2019 to 18% in 2022; p < 0.0001). There was no change for other minoritized social identities. There was no significant change over time in the proportion of students holding any of the minoritized social identities. A low correlation was found between the diversity of ACs and student cohorts. This study reaffirms the need for greater diversification efforts within ACs and student cohorts. Increased transparency about the social identities of AC members and about ACs' commitment to diversification may facilitate the diversification of the profession.

2.
Clin Genet ; 103(4): 424-433, 2023 04.
Artículo en Inglés | MEDLINE | ID: mdl-36504324

RESUMEN

When genetic tests are not funded publicly, out-of-pocket (OOP) pay options may be discussed with patients. We evaluated trends in genetic testing and OOP pay for two publicly funded British Columbia clinical programs serving >12 000 patients/year (The Hereditary Cancer Program [HCP] and Provincial Medical Genetics Program [PMGP]) between 2015-2019. Linear and regression models were used to explore the association of OOP pay with patient demographic variables at HCP. An interrupted time series and linear and logistic regression models were used on PMGP data to examine the effect of a change in the funding body. The total number of tests completed through PMGP, and HCP increased by 260% and 320%, respectively. OOP pay increased at HCP by 730%. The mean annual income of patients who paid OOP at HCP was ≥$3500 higher than in the group with funded testing (p < 0.0001). The likelihood of OOP pay increased at PMGP before the funding body change (OR per month: 1.07; 95% CI: 1.04, 1.10); while this likelihood had an immediate 87% drop when the change occurred (OR: 0.13; 95% CI: 0.06, 0.32). Patients with higher incomes are more likely to pay OOP. Financial barriers can create disparities in clinical outcomes. Funding decisions have a significant impact on rate of OOP pay.


Asunto(s)
Atención a la Salud , Gastos en Salud , Humanos , Modelos Logísticos , Pruebas Genéticas , Colombia Británica
3.
Dermatology ; : 496-505, 2021 May 17.
Artículo en Inglés | MEDLINE | ID: mdl-34000718

RESUMEN

BACKGROUND: Spin - the misrepresentation of a study's results - has been identified in abstracts of studies focused on a variety of disorders from multiple fields of medicine. OBJECTIVES: This study's primary objective was to evaluate the abstracts of systematic reviews and meta-analyses focused on the treatment of atopic dermatitis for the nine most severe forms of spin. METHODS: We systematically searched Embase and MEDLINE for systematic reviews of atopic dermatitis therapies. Screening and data extraction occurred in a masked, duplicate fashion. Each included study was evaluated for the nine most severe types of spin and other study characteristics. RESULTS: Our searches retrieved 2,456 studies, of which 113 were included for data extraction. Spin was found in 74.3% of our included studies (84/113). Spin type 6 occurred most frequently (68/113, 60.2%). Spin types 1, 2, and 9 were not identified. All industry-funded systematic reviews contained spin in their abstract. The presence of spin was not associated with any specific study characteristics, including the methodological quality of the study. CONCLUSIONS: Severe forms of spin were found in the majority of abstracts for systematic reviews of atopic dermatitis treatments. Steps should be taken to prevent spin to improve the quality of reporting in abstracts.

4.
BMC Nephrol ; 22(1): 60, 2021 02 16.
Artículo en Inglés | MEDLINE | ID: mdl-33593328

RESUMEN

BACKGROUND: While catheters are often thought the result of emergency hemodialysis (HD) initiation among patients with little or no pre-dialysis nephrology care, the role of patient level of engagement in care and modality decision-making have not been fully explored. METHODS: This is a retrospective medical record review of adults (age 18-89 years) who received care in academically affiliated private practice, public hospital, or Veterans Administration settings prior to initiating HD with a catheter between 10/1/2011 and 9/30/2012. Primary predictors were level of patient engagement in nephrology care within 6 months of HD initiation and timing of modality decision-making. Primary outcomes were provider action (referral) and any patient action (evaluation by a vascular surgeon, vein mapping or vascular surgery) toward [arteriovenous fistula or graft, (AVF/AVG)] creation. RESULTS: Among 92 incident HD patients, 66% (n = 61) initiated HD via catheter, of whom 34% (n = 21) had ideal engagement in care but 42% (n = 25) had no documented decision. Providers referred 48% (n = 29) of patients for AVF/AVG, of whom 72% (n = 21) took any action. Ideal engagement in care predicted provider action (adjusted OR 13.7 [95% CI 1.08, 175.1], p = 0.04), but no level of engagement in care predicted patient action (p > 0.3). Compared to patients with no documented decision, those with documented decisions within 3, 3-12, or more than 12 months before initiating dialysis were more likely to have provider action toward AVF/AVG (adjusted OR [95% CI]: 9.0 [1.4,55.6], p = 0.2, 37.6 [3.3423.4] p = 0.003, and 4.8 [0.8, 30.6], p = 0.1, respectively); and patient action (adjusted OR [95% CI]: 18.7 [2.3, 149.0], p = 0.006, 20.4 [2.6, 160.0], p = 0.004, and 6.2 [0.9, 44.0], p = 0.07, respectively). CONCLUSIONS: Timing of patient modality decision-making, but not level of engagement in pre-dialysis nephrology care, was predictive of patient and provider action toward AVF/AVG Interventions addressing patients' psychological preparation for dialysis are needed.


Asunto(s)
Derivación Arteriovenosa Quirúrgica , Catéteres de Permanencia , Toma de Decisiones Clínicas , Fallo Renal Crónico/terapia , Nefrología , Participación del Paciente , Diálisis Renal , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Persona de Mediana Edad , Diálisis Renal/instrumentación , Estudios Retrospectivos , Adulto Joven
5.
BMC Womens Health ; 20(1): 10, 2020 01 23.
Artículo en Inglés | MEDLINE | ID: mdl-31969140

RESUMEN

BACKGROUND: Most neonatal, infant, and child deaths occur in low- and middle-income countries (LMICs), where incidence of intimate partner violence (IPV) is highest in the world. Despite these facts, research regarding whether the two are associated is limited. The main objective was to examine associations between IPV amongst East African women and risk of death among their neonates, infants, and children, as well as related variables. METHODS: Analysis was conducted on data drawn from the Demographic and Health Surveys (DHS) conducted by ICF Macro/MEASURE DHS in five East African countries: Burundi, Kenya, Rwanda, Tanzania, and Uganda. The analytical sample included 11,512 women of reproductive age (15-49 years). The outcome variables, described by proportions and frequencies, were the presence or absence of neonatal, infant, and under-five mortality. Our variable of interest, intimate partner violence, was a composite variable of physical, sexual, and emotional abuse; chi-square tests were used to analyze its relationship with categorical variables. Adjusted odds ratios (aOR) were also used in linking sexual autonomy to independent variables. RESULTS: Children born to women who experienced IPV were significantly more likely to die as newborns (aOR = 1.3, 95% confidence interval [CI]: 1.4-2.2) and infants (aOR = 1.9, 95% CI: 1.6-2.2), and they were more likely to die by the age of five (aOR = 1.5, 95% CI: 1.01-1.55). Socioeconomic indicators including area of residence, wealth index, age of mother/husband, religion, level of education, employment status, and mass media usage were also significantly associated with IPV. After regression modelling, mothers who were currently using contraceptives were determined less likely to have their children die as newborns (aOR = 0.5, 95% CI: 0.3-0-7), as infants (aOR = 0.5, 95% CI: 0.3-06), and by age five (aOR = 0.4, 95% CI: 02-0.6). CONCLUSION: Understanding IPV as a risk indicator for neonatal, infant, and child deaths can help in determining appropriate interventions. IPV against women should be considered an urgent priority within programs and policies aimed at maximizing survival of infants and children in East Africa and the wellbeing and safety of their mothers.


Asunto(s)
Mortalidad del Niño , Mortalidad Infantil , Violencia de Pareja , África Oriental/epidemiología , Preescolar , Estudios Transversales , Demografía , Femenino , Humanos , Lactante , Recién Nacido , Violencia de Pareja/prevención & control , Violencia de Pareja/estadística & datos numéricos , Masculino , Evaluación de Necesidades , Factores de Riesgo , Factores Socioeconómicos
7.
J Surg Res ; 224: 233-239, 2018 04.
Artículo en Inglés | MEDLINE | ID: mdl-29506846

RESUMEN

BACKGROUND: Recent studies have highlighted the risk of bias and the fragility of results in randomized controlled trials (RCTs). The aim of our study was to evaluate the clinical practice guidelines created by the Society for Gastrointestinal and Endoscopic Surgeons (SAGES) for fragility, statistical power, and risk of bias. MATERIALS AND METHODS: We screened the SAGES clinical practice guideline references for qualifying RCTs. RCTs were assessed for risk of bias using the Cochrane Collaboration Risk of Bias tool 2.0. We used the fragility index and fragility quotient to evaluate the robustness of trial results and conducted a power analysis using G*Power to determine if trials were adequately powered. RESULTS: Twenty-two (40.7%) of the 54 trials that we assessed were rated as having a high risk of bias, 17 (31.5%) were rated as having a low risk of bias, and 15 (27.8%) were rated as having some concerns. The median fragility index was 2.5 (interquartile range 1-7). The median fragility quotient was 0.021 (interquartile range 0.003-0.045). Mean sample size was 108, and the mean loss to follow-up was eight patients. Eight of 33 trials (24.2%) were found to be underpowered according to the sample size used in the primary outcome. CONCLUSIONS: Guidelines created by SAGES are supported by RCTs that are frequently fragile or underpowered or have a high risk of bias. Future RCTs should utilize the Consolidated Standards of Reporting Trials statement, implement strategies to minimize loss to follow-up, and use properly powered sample sizes.


Asunto(s)
Endoscopía/normas , Laparoscopía/normas , Guías de Práctica Clínica como Asunto/normas , Ensayos Clínicos Controlados Aleatorios como Asunto/normas , Sesgo , Humanos
8.
Parasitology ; 145(8): 1039-1050, 2018 07.
Artículo en Inglés | MEDLINE | ID: mdl-29198245

RESUMEN

Haemogregarines (Apicomplexa: Adeleiorina) are a diverse group of haemoparasites reported from almost all vertebrate classes. The most commonly recorded haemogregarines to parasitize anurans are species of Hepatozoon Miller, 1908. To date 16 Hepatozoon species have been described from anurans in Africa, with only a single species, Hepatozoon hyperolli (Hoare, 1932), infecting a member of the Hyperoliidae. Furthermore, only two Hepatozoon species are known from South African anurans, namely Hepatozoon theileri (Laveran, 1905) and Hepatozoon ixoxo Netherlands, Cook and Smit, 2014, from Amietia delalandii (syn. Amietia quecketti) and three Sclerophrys species, respectively. Blood samples were collected from a total of 225 individuals representing nine hyperoliid species from several localities throughout northern KwaZulu-Natal, South Africa. Twenty frogs from three species were found positive for haemogregarines, namely Afrixalus fornasinii (6/14), Hyperolius argus (2/39), and Hyperolius marmoratus (12/74). Based on morphological characteristics, morphometrics and molecular findings three new haemogregarine species, Hepatozoon involucrum Netherlands, Cook and Smit n. sp., Hepatozoon tenuis Netherlands, Cook and Smit n. sp. and Hepatozoon thori Netherlands, Cook and Smit n. sp., are described from hyperoliid hosts. Furthermore, molecular analyses show anuran Hepatozoon species to be a separate monophyletic group, with species isolated from African hosts forming a monophyletic clade within this cluster.


Asunto(s)
Anuros/parasitología , Coccidiosis/parasitología , Eucoccidiida/clasificación , Animales , Coccidiosis/epidemiología , ADN Protozoario/genética , ADN Ribosómico/genética , Eucoccidiida/aislamiento & purificación , Eucoccidiida/ultraestructura , Parasitemia , Filogenia , Reacción en Cadena de la Polimerasa , Sudáfrica/epidemiología
9.
BMC Nephrol ; 19(1): 107, 2018 05 03.
Artículo en Inglés | MEDLINE | ID: mdl-29724177

RESUMEN

BACKGROUND: African Americans have persistently poor access to living donor kidney transplants (LDKT). We conducted a small randomized trial to provide preliminary evidence of the effect of informational decision support and donor financial assistance interventions on African American hemodialysis patients' pursuit of LDKT. METHODS: Study participants were randomly assigned to receive (1) Usual Care; (2) the Providing Resources to Enhance African American Patients' Readiness to Make Decisions about Kidney Disease (PREPARED); or (3) PREPARED plus a living kidney donor financial assistance program. Our primary outcome was patients' actions to pursue LDKT (discussions with family, friends, or doctor; initiation or completion of the recipient LDKT medical evaluation; or identification of a donor). We also measured participants' attitudes, concerns, and perceptions of interventions' usefulness. RESULTS: Of 329 screened, 92 patients were eligible and randomized to Usual Care (n = 31), PREPARED (n = 30), or PREPARED plus financial assistance (n = 31). Most participants reported interventions helped their decision making about renal replacement treatments (62%). However there were no statistically significant improvements in LDKT actions among groups over 6 months. Further, no participants utilized the living donor financial assistance benefit. CONCLUSIONS: Findings suggest these interventions may need to be paired with personal support or navigation services to overcome key communication, logistical, and financial barriers to LDKT. TRIAL REGISTRATION: ClinicalTrials.gov [ NCT01439516 ] [August 31, 2011].


Asunto(s)
Negro o Afroamericano , Técnicas de Apoyo para la Decisión , Apoyo Financiero , Trasplante de Riñón/métodos , Donadores Vivos , Diálisis Renal/métodos , Adulto , Negro o Afroamericano/psicología , Anciano , Toma de Decisiones , Femenino , Conocimientos, Actitudes y Práctica en Salud , Humanos , Trasplante de Riñón/economía , Trasplante de Riñón/psicología , Donadores Vivos/psicología , Masculino , Persona de Mediana Edad , Participación del Paciente/economía , Participación del Paciente/métodos , Participación del Paciente/psicología , Diálisis Renal/economía , Diálisis Renal/psicología , Obtención de Tejidos y Órganos , Resultado del Tratamiento
10.
Ann Plast Surg ; 81(2): 215-219, 2018 08.
Artículo en Inglés | MEDLINE | ID: mdl-29794510

RESUMEN

BACKGROUND: Ensuring that published studies are of the highest methodological quality is a critical step in plastic surgery's transition to a more evidence-based field. Reporting guidelines and reporting of clinical trial registration may serve as promising avenues of increasing the methodological quality in plastic surgery trials. OBJECTIVE: The objective of this study is to evaluate the rate at which plastic surgery journals require reporting guidelines, as well as the effect these policies have on adherence to reporting guidelines. METHODS: Using journal's "Instructions for Authors," we conducted a cross-sectional survey to evaluate journal policies regarding adherence to reporting guidelines and trial registration. We also examined whether trials published in journals referencing Consolidated Standards of Reporting of Trials (CONSORT) had higher rates of compliance with publishing a CONSORT flow diagram and whether journals with trial registration policies were more likely to contain registered trials than journals without these requirements. RESULTS: Of the 20 plastic surgery journals, 13 (65%) did not mention a single guideline within their instructions to authors. Furthermore, 10 (50%) did not mention policies regarding clinical trial registration. In addition, journals with policies regarding the CONSORT statement were more likely to publish trials with a CONSORT flow diagram, and journals with policies regarding clinical trial registry were more likely to publish trials reporting registration. CONCLUSION AND RELEVANCE: Our study found that few plastic surgery journals mention reporting guidelines or trial registration in their instructions for authors. Our study also found that journal policies regarding guideline adherence and trial registration seem to be effective mechanisms toward improvement, and plastic surgery journals should consider adopting such policies.


Asunto(s)
Políticas Editoriales , Adhesión a Directriz/estadística & datos numéricos , Guías como Asunto/normas , Publicaciones Periódicas como Asunto/normas , Cirugía Plástica , Ensayos Clínicos como Asunto/normas , Estudios Transversales , Humanos , Publicaciones Periódicas como Asunto/estadística & datos numéricos , Sistema de Registros
11.
Folia Parasitol (Praha) ; 652018 Apr 03.
Artículo en Inglés | MEDLINE | ID: mdl-29657154

RESUMEN

To date, only a few species of Hepatozoon Miller, 1908 have been described from amphibians and reptiles of South Africa, including two species from anuran hosts, three from saurians, one from chelonians, and two from ophidians. Hepatozoon bitis (Fantham, 1925) and Hepatozoon refringens (Sambon et Seligmann, 1907), parasitising Bitis arientans (Merrem) and Pseudoaspis cana (Linnaeus), respectively, were described in the early 1900s and since then there have been no further species of Hepatozoon described from snakes in South Africa. Blood smears, used in peripheral blood haemogregarine stage morphometrics, and whole blood used in molecular characterisation of haemogregarines were collected from the caudal vein of six snakes of three species, namely Philothamnus hoplogaster (Günther), Philothamnus semivariegatus (Smith) and Philothamnus natalensis natalensis (Smith). For comparison, a comprehensive table summarising available information on species of Hepatozoon from African snakes is presented. Haemogregarines found infecting the snakes from the present study were morphologically and molecularly different from any previously described from Africa and are thus here described as Hepatozoon angeladaviesae sp. n. and Hepatozoon cecilhoarei sp. n. Both haemogregarine species were observed to cause considerable dehaemoglobinisation of the host cell, in case of infection with H. angeladaviesae resulting in a characteristic peripheral undulation of the host cell membrane and karyorrhexis. To the authors' knowledge, these are the first haemogregarines parasitising snakes of the genus Philothamnus Smith described using both morphological and molecular characteristics in Africa.


Asunto(s)
Coccidiosis/veterinaria , Colubridae/parasitología , Eucoccidiida/clasificación , Interacciones Huésped-Parásitos , Animales , Coccidiosis/parasitología , Coccidiosis/fisiopatología , Eucoccidiida/citología , Eucoccidiida/fisiología , Sudáfrica
12.
Nephrol Dial Transplant ; 32(1): 173-181, 2017 01 01.
Artículo en Inglés | MEDLINE | ID: mdl-27604984

RESUMEN

Background: The effect of maintenance intravenous (IV) iron administration on subsequent achievement of anemia management goals and mortality among patients recently initiating hemodialysis is unclear. Methods: We performed an observational cohort study, in adult incident dialysis patients starting on hemodialysis. We defined IV administration strategies over a 12-week period following a patient's initiation of hemodialysis; all those receiving IV iron at regular intervals were considered maintenance, and all others were considered non-maintenance. We used multivariable models adjusting for demographics, clinical and treatment parameters, iron dose, measures of iron stores and pro-infectious and pro-inflammatory parameters to compare these strategies. The outcomes under study were patients' (i) achievement of hemoglobin (Hb) of 10-12 g/dL, (ii) more than 25% reduction in mean weekly erythropoietin stimulating agent (ESA) dose and (iii) mortality, ascertained over a period of 4 weeks following the iron administration period. Results: Maintenance IV iron was administered to 4511 patients and non-maintenance iron to 8458 patients. Maintenance IV iron administration was not associated with a higher likelihood of achieving an Hb between 10 and 12 g/dL {adjusted odds ratio (OR) 1.01 [95% confidence interval (CI) 0.93-1.09]} compared with non-maintenance, but was associated with a higher odds of achieving a reduced ESA dose of 25% or more [OR 1.33 (95% CI 1.18-1.49)] and lower mortality [hazard ratio (HR) 0.73 (95% CI 0.62-0.86)]. Conclusions: Maintenance IV iron strategies were associated with reduced ESA utilization and improved early survival but not with the achievement of Hb targets.


Asunto(s)
Anemia/tratamiento farmacológico , Hierro/uso terapéutico , Diálisis Renal , Oligoelementos/uso terapéutico , Administración Intravenosa , Estudios de Cohortes , Manejo de la Enfermedad , Femenino , Hemoglobinas/análisis , Humanos , Masculino , Persona de Mediana Edad
13.
J Eukaryot Microbiol ; 64(2): 193-203, 2017 03.
Artículo en Inglés | MEDLINE | ID: mdl-27480595

RESUMEN

To date, only two haemogregarine parasite species have been described from South African anurans: Hepatozoon ixoxo, infecting toads of the genus Sclerophrys (syn. Amietophrynus); and Hepatozoon theileri, parasitising the common river frog, Amietia quecketti. Both species have been characterised using limited morphology, and molecular data from PCR amplified fragments of the 18S rRNA gene. However, no ultrastructural work has been performed thus far. The aim of this study was to add descriptive information on the two species by studying their ultrastructural morphology. Mature gamont stages, common in the peripheral blood of infected frogs, were examined by transmission electron microscopy. Results indicate that H. ixoxo and H. theileri share typical apicomplexan characteristics, but differ markedly in their external cellular structure. Hepatozoon ixoxo is an encapsulated parasite presenting a prominent cap at the truncate pole, and shows no visible modifications to the host cell membrane. In comparison, H. theileri does not present a capsule or cap, and produces marked morphological changes to its host cell. Scanning electron microscopy was performed to further examine the cytopathological effects of H. theileri, and results revealed small, knob-like protrusions on the erythrocyte surface, as well as notable distortion of the overall shape of the host cell.


Asunto(s)
Anuros/parasitología , Coccidiosis/parasitología , Coccidiosis/veterinaria , Eucoccidiida/ultraestructura , Enfermedades de los Animales/parasitología , Animales , Coccidiosis/sangre , ADN Protozoario/genética , Eritrocitos/parasitología , Eucoccidiida/clasificación , Eucoccidiida/genética , Microscopía Electrónica de Rastreo , Microscopía Electrónica de Transmisión , Filogenia , ARN Ribosómico 18S/genética , Ríos , América del Sur , Especificidad de la Especie
15.
J Am Soc Nephrol ; 25(11): 2649-57, 2014 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-24925723

RESUMEN

Young blacks receiving dialysis have an increased risk of death compared with whites in the United States. Factors influencing this disparity among the young adult dialysis population have not been well explored. Our study examined the relation of neighborhood socioeconomic status (SES) and racial differences in mortality in United States young adults receiving dialysis. We merged US Renal Data System patient-level data from 11,027 black and white patients ages 18-30 years old initiating dialysis between 2006 and 2009 with US Census data to obtain neighborhood poverty information for each patient. We defined low SES neighborhoods as those neighborhoods in U.S. Census zip codes with ≥20% of residents living below the federal poverty level and quantified race differences in mortality risk by level of neighborhood SES. Among patients residing in low SES neighborhoods, blacks had greater mortality than whites after adjusting for baseline demographics, clinical characteristics, rurality, and access to care factors. This difference in mortality between blacks and whites was significantly attenuated in higher SES neighborhoods. In the United States, survival between young adult blacks and whites receiving dialysis differs by neighborhood SES. Additional studies are needed to identify modifiable factors contributing to the greater mortality among young adult black dialysis patients residing in low SES neighborhoods.


Asunto(s)
Población Negra/estadística & datos numéricos , Fallo Renal Crónico/etnología , Fallo Renal Crónico/mortalidad , Diálisis Renal/mortalidad , Características de la Residencia/estadística & datos numéricos , Población Blanca/estadística & datos numéricos , Adolescente , Adulto , Femenino , Estudios de Seguimiento , Humanos , Incidencia , Estimación de Kaplan-Meier , Fallo Renal Crónico/terapia , Masculino , Prevalencia , Sistema de Registros/estadística & datos numéricos , Estudios Retrospectivos , Factores de Riesgo , Factores Socioeconómicos , Estados Unidos/epidemiología , Adulto Joven
16.
Parasitology ; : 1-10, 2014 Jun 13.
Artículo en Inglés | MEDLINE | ID: mdl-24923767

RESUMEN

SUMMARY Research was undertaken to clarify the true taxonomic position of the terrestrial tortoise apicomplexan, Haemogregarina fitzsimonsi (Dias, 1953). Thin blood films were screened from 275 wild and captive South African tortoises of 6 genera and 10 species between 2009-2011. Apicomplexan parasites within films were identified, with a focus on H. fitzsimonsi. Ticks from wild tortoises, especially Amblyomma sylvaticum and Amblyomma marmoreum were also screened, and sporogonic stages were identified on dissection of adult ticks of both species taken from H. fitzsimonsi infected and apparently non-infected tortoises. Parasite DNA was extracted from fixed, Giemsa-stained tortoise blood films and from both fresh and fixed ticks, and PCR was undertaken with two primer sets, HEMO1/HEMO2, and HepF300/HepR900, to amplify parasite 18S rDNA. Results indicated that apicomplexan DNA extracted from tortoise blood films and both species of tick had been amplified by one or both primer sets. Haemogregarina  fitzsimonsi 18S rDNA sequences from tortoise blood aligned with those of species of Hepatozoon, rather than those of species of Haemogregarina or Hemolivia. It is recommended therefore that this haemogregarine be re-assigned to the genus Hepatozoon, making Hepatozoon fitzsimonsi (Dias, 1953) the only Hepatozoon known currently from any terrestrial chelonian. Ticks are its likely vectors.

17.
Folia Parasitol (Praha) ; 61(4): 293-300, 2014 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-25185400

RESUMEN

Blood smears prepared from the peripheral blood of 20 wild caught Amietia quecketti (Boulenger) from the North-West University Botanical Gardens, North West Province, South Africa, were examined for the presence of haemogregarines. A haemogregarine species comparative in morphology, host and geographical locality to that of Haemogregarina theileri Laveran, 1905 was detected. The original description of H. theileri was based solely on frog peripheral blood gamont stages. Later, further parasite stages, including trophozoites and merogonic liver stages, were recorded in a related Amietia sp. from equatorial Africa. This species was originally classified as a member of the genus Haemogregarina Danilewsky, 1885, but due to the close life cycle and morphological resemblance to those of Hepatozoon species, H. theileri was later transferred from Haemogregarina to Hepatozoon Miller, 1908. In the present study, meront and merozoite stages not described before, along with previously observed trophozoite, immature and mature gamont stages, are described from the peripheral blood of hosts. In addition, comparative phylogenetic analysis of the partial 18S rDNA sequence of Hepatozoon theileri to those of other haemogregarine species, including those of species of Hepatozoon and a Haemogregarina, support the taxonomic transfer of H. theileri to Hepatozoon, nesting H. theileri within a clade comprising species parasitising other amphibians. This is the first molecular and phylogenetic analysis of an African anuran species of Hepatozoon.


Asunto(s)
Apicomplexa/clasificación , Apicomplexa/aislamiento & purificación , Enfermedades Parasitarias en Animales/parasitología , Ranidae/parasitología , Animales , Apicomplexa/genética , ADN Protozoario/genética , ADN Ribosómico/genética , Filogenia , Especificidad de la Especie
18.
Parasit Vectors ; 17(1): 314, 2024 Jul 20.
Artículo en Inglés | MEDLINE | ID: mdl-39033269

RESUMEN

BACKGROUND: Hepatozoon fitzsimonsi (Dias, 1953) is a frequently found haemogregarine of southern African tortoises. At the time of this species' reassignment from the genus Haemogregarina to Hepatozoon, developmental stages such as sporocysts and sporozoites were observed in ticks associated with H. fitzsimonsi parasitised and non-parasitised tortoises. It was thus suggested that ticks may act as the potential vectors for this parasite. However, this earlier research was unable to confirm the identity of these sporogonic stages using molecular markers. In a separate study aimed at identifying tick species parasitising South African reptiles and molecularly screening these for the presence of Hepatozoon, that study identified H. fitzsimonsi in tortoise-associated ticks. Thus, the present study aimed to revisit the potential of ticks to act as vectors for H. fitzsimonsi in tortoises using a combined microscopy and molecular approach. METHODS: Specimens of Kinixys natalensis, Kinixys spekii, Kinixys zombensis and Stigmochelys pardalis were collected from Bonamanzi and Ndumo Game Reserve, South Africa. Upon capture, animals were examined for ticks, and these were collected along with blood and other tissues. Adult ticks were dissected and visceral impression slides were prepared along with thin blood and tissue smears on clean microscope slides. Smears and impression slides were stained with Giemsa, screened and micrographs of parasites were captured. Two primer sets were employed to target fragments of the 18S rRNA gene of parasites found in both tortoises and ticks and the resulting sequences were then compared with other known H. fitzsimonsi and haemogregarine sequences from the GenBank database. RESULTS: Peripheral blood gamont and liver merogonic stages were observed in S. pardalis, while the sporogonic stages were observed in the haemocoel of Amblyomma ticks. Gamont and sporocyst stages compared morphologically with previous descriptions of H. fitzsimonsi, identifying them as this species. Phylogenetic analysis revealed that the blood and tick sequences obtained in this study clustered in a monophyletic clade comprising known H. fitzsimonsi. CONCLUSIONS: The present study provides further support for ticks acting as the vectors of H. fitzsimonsi by molecularly identifying and linking observed developmental stages in tortoises (S. pardalis) with those in the invertebrate host (Amblyomma spp.).


Asunto(s)
Amblyomma , Filogenia , Tortugas , Animales , Tortugas/parasitología , Sudáfrica , Amblyomma/parasitología , Eucoccidiida/genética , Eucoccidiida/aislamiento & purificación , Eucoccidiida/clasificación , Coccidiosis/parasitología , Coccidiosis/veterinaria , Infestaciones por Garrapatas/veterinaria , Infestaciones por Garrapatas/parasitología , ARN Ribosómico 18S/genética
19.
Artículo en Inglés | MEDLINE | ID: mdl-37918557

RESUMEN

OBJECTIVE: SETD1A encodes a histone methyltransferase involved in various cell cycle regulatory processes. Loss-of-function SETD1A variants have been associated with numerous neurodevelopmental phenotypes, including intellectual disability and schizophrenia. While the association between rare coding variants in SETD1A and schizophrenia has achieved genome-wide significance by rare variant burden testing, only a few studies have described the psychiatric phenomenology of such individuals in detail. This systematic review and case report aims to characterize the neurodevelopmental and psychiatric phenotypes of SETD1A variant-associated schizophrenia. METHODS: A PubMed search was completed in July 2022 and updated in May 2023. Only studies that reported individuals with a SETD1A variant as well as a primary psychotic disorder were ultimately included. Additionally, another two previously unpublished cases of SETD1A variant-associated psychosis from our own sequencing cohort are described. RESULTS: The search yielded 32 articles. While 15 articles met inclusion criteria, only five provided case descriptions. In total, phenotypic information was available for 11 individuals, in addition to our own two unpublished cases. Our findings suggest that although individuals with SETD1A variant-associated schizophrenia may share a number of common features, phenotypic variability nonetheless exists. Moreover, although such individuals may exhibit numerous other neurodevelopmental features suggestive of the syndrome, their psychiatric presentations appear to be similar to those of general schizophrenia populations. CONCLUSIONS: Loss-of-function SETD1A variants may underlie the development of psychosis in a small percentage of individuals with schizophrenia. Identifying such individuals may become increasingly important, given the potential for advances in precision medicine treatment approaches.


Asunto(s)
Discapacidad Intelectual , Trastornos Psicóticos , Esquizofrenia , Humanos , Predisposición Genética a la Enfermedad , Discapacidad Intelectual/genética , Fenotipo , Trastornos Psicóticos/genética , Trastornos Psicóticos/psicología , Esquizofrenia/genética
20.
Am J Kidney Dis ; 61(3): 476-86, 2013 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-23089512

RESUMEN

BACKGROUND: Many patients with chronic kidney disease (CKD) have difficulty becoming actively engaged in the pursuit of preemptive living donor kidney transplantation. STUDY DESIGN: The Talking About Live Kidney Donation (TALK) Study was a randomized controlled trial of the effectiveness of educational and social worker interventions designed to encourage early discussions and active pursuit of preemptive living donor kidney transplantation in patients with progressive CKD. SETTING & PARTICIPANTS: We recruited participants with progressive CKD from academically affiliated nephrology practices in Baltimore, MD. INTERVENTION: Participants randomly received: (1) usual care (routine care with their nephrologists), the (2) TALK education intervention (video and booklet), or the (3) TALK social worker intervention (video and booklet plus patient and family social worker visits). OUTCOMES: We followed participants for 6 months to assess their self-reported achievement of behaviors reflecting their discussions about and/or pursuit of living donor kidney transplantation (discussions with family, discussions with physicians, initiating recipient evaluation, completing recipient evaluation, and identifying a potential living donor). MEASUREMENTS: We assessed outcomes through a questionnaire at 1-, 3-, and 6-months follow-up. RESULTS: Participants receiving usual care with their nephrologists (n = 44), TALK education (n = 43), and the TALK social worker (n = 43) were similar at baseline. TALK Study interventions improved participants' living donor kidney transplantation discussion and pursuit behaviors, with the social worker leading to greater patient activation (participants' predicted probability of achieving living donor kidney transplantation discussions, evaluations, or donor identification over 6 months): probabilities were 30% (95% CI, 20%-46%), 42% (95% CI, 33%-54%), and 58% (95% CI, 41%-83%), respectively, in the usual care, TALK education, and TALK social worker groups (P = 0.03). LIMITATIONS: Our population was well educated and mostly insured, potentially limiting generalizability of our findings. CONCLUSIONS: TALK interventions improved discussion and active pursuit of living donor kidney transplantation in patients with progressive CKD and may improve their use of preemptive living donor kidney transplantation.


Asunto(s)
Actitud Frente a la Salud , Trasplante de Riñón , Donadores Vivos , Educación del Paciente como Asunto , Insuficiencia Renal Crónica/cirugía , Servicio Social , Obtención de Tejidos y Órganos , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad
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