Structural changes in the retina as a potential biomarker in Parkinson's disease: an approach from optical coherence tomography.

Introduction: Parkinson's disease (PD) presents challenges in early diagnosis and follow-up due to the lack of characteristic findings. Recent studies suggest retinal changes in PD are possibly indicative of neurodegeneration. We explored these changes using optical coherence tomography (OCT) to assess retinal nerve fiber layer (RNFL) and ganglion cell complex (GCC) thickness. Methods: Thirty PD and non-PD patients were matched according to demographic characteristics and OCT and clinical evaluations to rule out other neurodegenerative and visual diseases. Results: We observed a significant thinning of the RNFL in patients diagnosed with PD compared to non-PD patients (p = 0.015). Additionally, this reduction in RNFL thickness was found to correlate with the severity of the disease (p = 0.04). Conclusion: The OCT serves as a tool for quantifying neurodegeneration in PD, showing a significant correlation with disease severity. These findings suggest that OCT could play a crucial role as a potential biomarker in the diagnosis and monitoring of PD.

Manifestaciones neurológicas por COVID-19. Reporte de casos en Hospital Militar Central Bogotá, Colombia, y revisión de la literatura / Neurological Manifestations due to COVID-19. Case Report at Hospital Militar Central Bogotá, Colombia, and Literature Review / Manifestações neurológicas pela COVID-19. Relato de casos no Hospital Militar Central Bogotá, Colombia, e revisão da literatura

Resumen: acorde a las fuentes epidemiológicas de la Organización Mundial de la Salud, en la última década, entre las principales causas de mortalidad más del 55 % resultaban de enfermedades no transmisibles, predominando la isquemia cardiaca y el accidente cerebrovascular como causales. En el 2019, con la aparición del nuevo coronavirus, COVID-19, como etiología de la pandemia que ha impactado tanto en salud como económica y socialmente al mundo, las cifras de la curva de las causas usuales de mortalidad han cambiado no solo a causa del efecto directo de la enfermedad en los múltiples órganos, sino también por los efectos indirectos en relación con falta de acceso a atención médica en enfermedades crónicas. Dado que es una enfermedad transmisible, el COVID-19 produce alteraciones, principalmente respiratorias y vasculares, sin embargo, el mayor conocimiento de los aspectos fisiopatológicos de la enfermedad ha revelado el compromiso de múltiples sistemas, destacando el sistema nervioso central como un objetivo del virus que impacta en las secuelas y los desenlaces de los pacientes, de modo que se documentan manifestaciones neurológicas hasta en un 55 %. El objetivo de esta revisión es caracterizar una serie de casos de pacientes en el Hospital Militar Central, mediante la descripción de aspectos fisiopatológicos y clínicos del compromiso neurológico.

Summary: according to the epidemiological sources of the World Health Organization, In the last decade, among the leading causes of mortality, more than 55 % resulted from non-communicable diseases, predominating cardiac ischemia, and stroke as the leading causes. In 2019, with the appearance of the new coronavirus, COVID-19, as an etiology of the pandemic that has Impacted health, economy, and society, the familiar figures of the mortality curve have changed, not only because of the direct effect of the disease on multiple organs, but also because of the Indirect effects, concerning lack of access to medical care in chronic diseases. Since it is a communicable disease, COVID-19 produces alterations, mainly respiratory and vascular; however, the greater knowledge of the pathophysiological aspects of the disease has revealed the involvement of multiple systems, highlighting the central nervous system as a target of the virus that impacts on the sequelae and outcomes of patients, so neurological manifestations are documented up to 55 %. The objective of this review Is to characterize a series of cases of patients in Hospital Militar Central, by the description of pathophysiological and clinical aspects of the neurological compromise.

Resumo: de acordo com fontes epidemiológicas da Organização Mundial da Saúde, na última década, entre as principais causas de mortalidade, mais de 55 % resultavam de doenças não transmissíveis, com predominância da Isquemia cardíaca e do acídente cerebrovascular como causais. Em 2019, com o surgimento no novo coronavirus (COVID-19), como etiologia da pandemia que vem Impactando tanto em saúde quanto económica e socialmente o mundo inteiro, as cifras da curva das causas usuais de mortalidade vêm mudando não somente devido ao efeito direto da doença nos múltiplos órgãos, mas também aos efeitos indiretos com relação à falta de acesso à atenção médica em doenças crónicas. Tendo em vista que é uma doença transmissível, a COVID-19 produz alterações principalmente respiratórias e vasculares, contudo o maior conhecimento dos aspectos fisiopatológicos da doença revela o comprometimento de vários sistemas, destacando o nervoso central como um objetivo do vírus, que Impacta nas sequelas e nos desenlaces dos pacientes, de modo que são registradas manifestações neurológicas de até 55 %. O objetivo desta revisão é caracterizar uma série de casos de pacientes no Hospital Militar Central, mediante a descrição de aspectos flsiopatológicos e clínicos do comprometimento neurológico.

Manifestaciones neurológicas del herpes virus simple y varicela zóster / Neurological manifestations of herpes simplex virus and varicella zoster

RESUMEN El espectro de manifestaciones neurológicas secundarias a la infección por la familia de virus Herpesviridae es heterogénea, depende de factores ambientales, de la susceptibilidad inmunológica del huésped (infección de por vida) y la susceptibilidad genética, entre otras variables. Así, el compromiso puede ser fatal en ausencia de un rápido diagnóstico y tratamiento. El objetivo de revisar la neuroinfección por herpesvirus tipo 1 (HSV-1), tipo 2 (HSV-2) y virus de la varicela zóster (VVZ) es profundizar en aquellas manifestaciones clínicas que generan compromiso del sistema nervioso central y periférico, así como contribuir a una detección y confirmación temprana de la infección, establecer un enfoque terapéutico adecuado, que depende del compromiso clínico, y, finalmente, minimizar las complicaciones y secuelas neurológicas a largo plazo.

SUMMARY The spectrum of neurological manifestations secondary to infection by the family of viruses Herpesviridae is heterogeneous depending on environmental factors, susceptibility host immunological (infection for life), genetic susceptibility among other variables. Thus, the compromise can be fatal in the absence of prompt diagnosis and treatment. He objective of reviewing neuroinfection by Herpes virus type 1 (HSV-1), type 2 (HSV-2) and virus varicella zoster (VVZ) is to delve into those clinical manifestations that generate central and peripheral nervous system involvement, seeks to detect and confirm early, and likewise establish an adequate therapeutic approach that depends on the clinical commitment, ultimately minimizing long-term neurological complications and sequelae term.

Neurodevelopmental findings in children 20-30 months of age with postnatal Zika infection at 1-12 months of age, Colombia, September-November 2017.

BACKGROUND: Zika virus (ZIKV) infection during pregnancy can cause infant brain and eye abnormalities and has been associated with adverse neurodevelopmental outcomes in exposed infants. Evidence is limited on ZIKV's effects on children infected postnatally within the first year of life. OBJECTIVE: To determine whether any adverse neurodevelopmental outcomes occurred in early childhood for children infected postnatally with ZIKV during infancy, given the neurotoxicity of ZIKV infection and the rapid brain development that occurs in infancy and early childhood. METHODS: The Colombia Instituto Nacional de Salud (INS) conducted health and developmental screenings between September and November 2017 to evaluate 60 children at ages 20-30 months who had laboratory-confirmed symptomatic postnatal ZIKV infection at ages 1-12 months. We examined the frequency of adverse neurologic, hearing, eye, and developmental outcomes as well as the relationship between age at Zika symptom onset and developmental outcomes. RESULTS: Nine of the 60 (15.0%) children had adverse outcomes on the neurologic, hearing, or eye examination. Six of the 47 (12.8%) children without these adverse findings, and who received a valid developmental screening, had an alert score in the hearing-language domain which signals the need for additional developmental evaluation. CONCLUSION: Neurologic, hearing, eye, and developmental findings suggest reassuring results. Since the full spectrum of neurodevelopmental outcomes in children postnatally infected with ZIKV remains unknown, routine paediatric care is advised to monitor the development of these children to ensure early identification of any adverse neurodevelopmental outcomes.

Effect of a High-Intensity Tandem Bicycle Exercise Program on Clinical Severity, Functional Magnetic Resonance Imaging, and Plasma Biomarkers in Parkinson's Disease.

Rationale: The optimal modality, intensity, duration, frequency, and dose-response of exercise as a therapy for Parkinson's Disease (PD) are insufficiently understood. Objective: To assess the impact of a high-intensity tandem bicycle program on clinical severity, biomarkers, and functional MRI (fMRI) in PD. Methods: A single-center, parallel-group clinical trial was conducted. Thirteen PD patients aged 65 or younger were divided in two groups: a control group and an intervention group that incorporated a cycling program at 80% of each individual's maximum heart rate (HR) (≥80 rpm), three times a week, for 16 weeks. Both groups continued their conventional medications for PD. At baseline and at the end of follow-up, we determined in all participants the Unified Parkinson's Disease Rating Scale, anthropometry, VO2max, PD biomarkers, and fMRI. Results: VO2max improved in the intervention group (IG) (+5.7 ml/kg/min), while it slightly deteriorated in the control group (CG) (-1.6 ml/kg/min) (p = 0.041). Mean Unified Parkinson's Disease Rating Scale (UPDRS) went down by 5.7 points in the IG and showed a small 0.9-point increase in the CG (p = 0.11). fMRI showed activation of the right fusiform gyrus during the motor task and functional connectivity between the cingulum and areas of the frontal cortex, and between the cerebellar vermis and the thalamus and posterior temporal gyrus. Plasma brain-derived neurotrophic factor (BDNF) levels increased more than 10-fold in the IG and decreased in the CG (p = 0.028). Larger increases in plasma BDNF correlated with greater decreases in UPDRS (r = -0.58, p = 0.04). Conclusions: Our findings suggest that high-intensity tandem bicycle improves motor function and biochemical and functional neuroimaging variables in PD patients. Trial registration number: ISRCTN 13047118, Registered on February 8, 2018.

Zika Virus Disease and Pregnancy Outcomes in Colombia.

BACKGROUND: In 2015 and 2016, Colombia had a widespread outbreak of Zika virus. Data from two national population-based surveillance systems for symptomatic Zika virus disease (ZVD) and birth defects provided complementary information on the effect of the Zika virus outbreak on pregnancies and infant outcomes. METHODS: We collected national surveillance data regarding cases of pregnant women with ZVD that were reported during the period from June 2015 through July 2016. The presence of Zika virus RNA was identified in a subgroup of these women on real-time reverse-transcriptase-polymerase-chain-reaction (rRT-PCR) assay. Brain or eye defects in infants and fetuses and other adverse pregnancy outcomes were identified among the women who had laboratory-confirmed ZVD and for whom data were available regarding pregnancy outcomes. We compared the nationwide prevalence of brain and eye defects during the outbreak with the prevalence both before and after the outbreak period. RESULTS: Of 18,117 pregnant women with ZVD, the presence of Zika virus was confirmed in 5926 (33%) on rRT-PCR. Of the 5673 pregnancies with laboratory-confirmed ZVD for which outcomes had been reported, 93 infants or fetuses (2%) had brain or eye defects. The incidence of brain or eye defects was higher among pregnancies in which the mother had an onset of ZVD symptoms in the first trimester than in those with an onset during the second or third trimester (3% vs. 1%). A total of 172 of 5673 pregnancies (3%) resulted in pregnancy loss; after the exclusion of pregnancies affected by birth defects, 409 of 5426 (8%) resulted in preterm birth and 333 of 5426 (6%) in low birth weight. The prevalence of brain or eye defects during the outbreak was 13 per 10,000 live births, as compared with a prevalence of 8 per 10,000 live births before the outbreak and 11 per 10,000 live births after the outbreak. CONCLUSIONS: In pregnant women with laboratory-confirmed ZVD, brain or eye defects in infants or fetuses were more common during the Zika virus outbreak than during the periods immediately before and after the outbreak. The frequency of such defects was increased among women with a symptom onset early in pregnancy. (Funded by the Colombian Instituto Nacional de Salud and the Centers for Disease Control and Prevention.).

Enfermedad de Parkinson y covid-19: una pandemia en medio de otra / Parkinson disease and COVID-19: two pandemics at once

RESUMEN La emergencia sanitaria que ha generado la infección por el covid-19 ha llevado a la necesidad de implementar diversas estrategias para disminuir y prevenir el riesgo de complicaciones en pacientes con enfermedades crónicas que requieren de un seguimiento periódico estricto. La enfermedad de Parkinson es uno de los trastornos neurodegenerativos que más rápido aumento ha mostrado en las últimas décadas, por lo que es importante establecer algunas recomendaciones para el manejo de estos pacientes. Aunque hasta el momento no hay evidencia contundente que demuestre que la enfermedad de Parkinson aumenta el riesgo de desenlaces adversos del covid-19, es posible que la presencia de diversas comorbilidades y la edad avanzada puedan aumentar las complicaciones y la probabilidad de estancia prolongada en caso de contraer la infección. El uso de herramientas de evaluación a distancia como la telemedicina garantizan una valoración oportuna y permiten la realización de ajustes al tratamiento en el momento en que éstos sean requeridos, mejorando la calidad de vida de los pacientes durante este periodo. Adicionalmente, en esta revisión se generan recomendaciones asociadas al manejo de terapias avanzadas como la cirugía de estimulación cerebral profunda y los dispositivos de infusión de medicamentos, y se exponen consideraciones relacionadas con las terapias de rehabilitación, actividad física y bienestar psicológico de estos pacientes en el transcurso de la pandemia.

SUMMARY Current global impact of the COVID-19 pandemic has generated new challenges to continue to provide optimal medical care in patients with chronic diseases in need of regular follow-up. The number of persons suffering from Parkinson disease (PD) has exponentially grown up in the last decade and according to the World Health Organization, this disease is expected to keep growing. For this reason, it is important to review some recommendations for treatment and follow-up of PD patients. Current knowledge does not support an increased risk of infection with COVID-19 in people with PD, but advanced age on average and the usual comorbidities of this population are well-known factors that increase mortality of this infection. Telemedicine and other technologies emerge as a powerful tool to deliver optimal clinical care and improve quality of life in the context of the pandemic. Additionally, this review presents recommendations for management of advanced therapies in PD such as deep brain stimulation and infusion therapies as well as useful strategies for adapt physical activities, rehabilitation, and psychosocial well-being during the mandatory lockdown.

Etiology of Microcephaly and Central Nervous System Defects during the Zika Epidemic in Colombia.

OBJECTIVE: To estimate the prevalence of microcephaly and central nervous system (CNS) defects during the Zika virus (ZIKV) epidemic in Colombia and proportion attributable to congenital ZIKV infection. STUDY DESIGN: Clinical and laboratory data for cases of microcephaly and/or CNS defects reported to national surveillance between 2015 and 2017 were reviewed and classified by a panel of clinical subject matter experts. Maternal and fetal/infant biologic specimens were tested for congenital infection and chromosomal abnormalities. Infants/fetuses with microcephaly and/or CNS defects (cases) were classified into broad etiologic categories (teratogenic, genetic, multifactorial, and unknown). Cases classified as potentially attributable to congenital ZIKV infection were stratified by strength of evidence for ZIKV etiology (strong, moderate, or limited) using a novel strategy considering birth defects unique or specific to ZIKV or other infections and laboratory evidence. RESULTS: Among 858 reported cases with sufficient information supporting a diagnosis of microcephaly or CNS defects, 503 were classified as potentially attributable to congenital ZIKV infection. Of these, the strength of evidence was considered strong in 124 (24.7%) cases; moderate in 232 (46.1%) cases; and limited in 147 (29.2%). Of the remaining, 355 (41.4%) were attributed to etiologies other than ZIKV infection (syphilis, toxoplasmosis, rubella, cytomegalovirus, herpes 1 and herpes 2 viruses only, n = 32 [3.7%]; genetic, n = 16 [1.9%]; multifactorial, n = 42 [4.9%]; unknown, n = 265 [30.9%]). CONCLUSIONS: Fifty-eight percent of cases of microcephaly and/or CNS defects were potentially attributable to congenital ZIKV infection; however, the strength of evidence varied considerably. This surveillance protocol might serve as a model approach for investigation and etiologic classification of complex congenital conditions.

Las diferentes facetas de la encefalitis autoinmune / The different facets of autoinmune encephalitis

RESUMEN INTRODUCCIÓN: La encefalitis autoinmune es causada por mecanismos inmunes antineuronales, su presentación clínica es heterogénea, los criterios clínicos y paraclínicos disponibles orientan el abordaje, sin embargo, el reto ocurre cuando no hay autoanticuerpos detectables en suero o líquido cefalorraquídeo (LCR). METODOLOGÍA: Reportamos cuatro casos destacando la variabilidad de las manifestaciones clínicas, que ante la ausencia de anticuerpos (negativos finalmente en tres de los casos) fueron tratados con inmunoterapia con buena respuesta. CONCLUSIÓN: En sitios donde no se dispone de medición de anticuerpos de manera expedita, o a pesar de ser estos negativos, ante la sospecha clínica, apoyado de estudios de LCR, resonancia magnética nuclear y registro electroencefalográfico, se sugiere iniciar inmunoterapia temprana, usualmente dando lugar a reversibilidad del trastorno neurológico.

SUMMARY INTRODUCTION: Autoimmune encephalitis is caused by antineuronal immune mechanisms, its clinical presentation is heterogeneous, clinical and paraclinical criteria guide the approach, however, the challenge occurs when there are no detectable autoantibodies in serum or cerebrospinal fluid. METHODOLOGY: We report four cases that highlight the variability of clinical manifestations, which in the absence of antibodies (finally negative in three of the cases) were treated with immunotherapy with good response. CONCLUSION: In places where antibody measurement is not available expeditiously, or despite it being negative, given clinical suspicion, supported by CSF studies, magnetic resonance imaging and electroencephalographic recording, it is suggested to start early immunotherapy, usually resulting in the reversibility of the neurological disorder.

Zika Virus Disease in Colombia - Preliminary Report.

BACKGROUND: Colombia began official surveillance for Zika virus disease (ZVD) in August 2015. In October 2015, an outbreak of ZVD was declared after laboratory-confirmed disease was identified in nine patients. METHODS: Using the national population-based surveillance system, we assessed patients with clinical symptoms of ZVD from August 9, 2015, to April 2, 2016. Laboratory test results and pregnancy outcomes were evaluated for a subgroup of pregnant women. Concurrently, we investigated reports of microcephaly for evidence of congenital ZVD. RESULTS: By April 2, 2016, there were 65,726 cases of ZVD reported in Colombia, of which 2485 (4%) were confirmed by means of reverse-transcriptase-polymerase-chain-reaction (RT-PCR) assay. The overall reported incidence of ZVD among female patients was twice that in male patients. A total of 11,944 pregnant women with ZVD were reported in Colombia, with 1484 (12%) of these cases confirmed on RT-PCR assay. In a subgroup of 1850 pregnant women, more than 90% of women who were reportedly infected during the third trimester had given birth, and no infants with apparent abnormalities, including microcephaly, have been identified. A majority of the women who contracted ZVD in the first or second trimester were still pregnant at the time of this report. Among the cases of microcephaly investigated from January 2016 through April 2016, four patients had laboratory evidence of congenital ZVD; all were born to asymptomatic mothers who were not included in the ZVD surveillance system. CONCLUSIONS: Preliminary surveillance data in Colombia suggest that maternal infection with the Zika virus during the third trimester of pregnancy is not linked to structural abnormalities in the fetus. However, the monitoring of the effect of ZVD on pregnant women in Colombia is ongoing. (Funded by Colombian Instituto Nacional de Salud and the Centers for Disease Control and Prevention.).

Trastorno de control de impulsos (TCI) en enfermedad de Parkinson / Impulse control disorders (ICD) in Parkinson's disease

RESUMEN Los trastornos del control de impulsos (TCI) son complicaciones psiquiátricas de la enfermedad de Parkinson (EP), cada vez más reconocidos, pero que persisten subdiagnosticados y pueden llegar a ser muy disruptivos para la vida familiar del paciente, en especial si no son detectados a tiempo. Si bien uno de sus principales riesgos es el uso de agonistas dopaminérgicos, estos no son su única causa, se pueden ver sin relación con medicamentos o con cualquier tratamiento para la EP. Por lo tanto, se debe interrogar sistemáticamente por su presencia y educar al paciente y su familia para que sean reportados en cualquier momento. El objetivo de este capítulo es describir los diferentes tipos de TCI, sus factores de riesgo y tratamiento.

SUMMARY Impulse Control Disorders (ICD) are psychiatric complications of Parkinson's Disease (PD), increasingly recognized, but which persist underdiagnosed and can be vert disruptive to the patient's family life, especially if they are not detected in time. Although one of its main risks is the use of dopamine agonists, these are not the only cause, they can be seen without realtion to medications ot any treatment for PD, therefore it should be questioned systematically by their presence and educate the patient and his family to be reported at any time. The objective of this chapter is to describe the different types of ICD, their risk factors and treatment.

Hospital-Associated Multicenter Outbreak of Emerging Fungus Candida auris, Colombia, 2016.

Candida auris is an emerging multidrug-resistant fungus that causes hospital-associated outbreaks of invasive infections with high death rates. During 2015-2016, health authorities in Colombia detected an outbreak of C. auris. We conducted an investigation to characterize the epidemiology, transmission mechanisms, and reservoirs of this organism. We investigated 4 hospitals with confirmed cases of C. auris candidemia in 3 cities in Colombia. We abstracted medical records and collected swabs from contemporaneously hospitalized patients to assess for skin colonization. We identified 40 cases; median patient age was 23 years (IQR 4 months-56 years). Twelve (30%) patients were <1 year of age, and 24 (60%) were male. The 30-day mortality was 43%. Cases clustered in time and location; axilla and groin were the most commonly colonized sites. Temporal and spatial clustering of cases and skin colonization suggest person-to-person transmission of C. auris. These cases highlight the importance of adherence to infection control recommendations.

The decline of dengue in the Americas in 2017: discussion of multiple hypotheses.

OBJECTIVE: Since the 1980s, dengue incidence has increased 30-fold. However, in 2017, there was a noticeable reduction in reported dengue incidence cases within the Americas, including severe and fatal cases. Understanding the mechanism underlying dengue's incidence and decline in the Americas is vital for public health planning. We aimed to provide plausible explanations for the decline in 2017. METHODS: An expert panel of representatives from scientific and academic institutions, Ministry of Health officials from Latin America and PAHO/WHO staff met in October 2017 to propose hypotheses. The meeting employed six moderated plenary discussions in which participants reviewed epidemiological evidence, suggested explanatory hypotheses, offered their expert opinions on each and developed a consensus. RESULTS: The expert group established that in 2017, there was a generalised decreased incidence, severity and number of deaths due to dengue in the Americas, accompanied by a reduction in reported cases of both Zika and chikungunya virus infections, with no change in distribution among age groups affected. This decline was determined to be unlikely due to changes in epidemiological surveillance systems, as similar designs of surveillance systems exist across the region. Although sudden surveillance disruption is possible at a country or regional level, it is unlikely to occur in all countries simultaneously. Retrospective modelling with epidemiological, immunological and entomological information is needed. Host or immunological factors may have influenced the decline in dengue cases at the population level through immunity; however, herd protection requires additional evidence. Uncertainty remains regarding the effect on the outcome of sequential infections of different dengue virus (DENV) types and Zika virus (ZIKV), and vice versa. Future studies were recommended that examine the epidemiological effect of prior DENV infection on Zika incidence and severity, the epidemiological effect of prior Zika virus infection on dengue incidence and severity, immune correlates based on new-generation ELISA assays, and impact of prior DENV/other arbovirus infection on ZIKV immune response in relation to number of infections and the duration of antibodies in relation to interval of protection. Follow-up studies should also investigate whether increased vector control intensification activities contributed to the decline in transmission of one or more of these arboviruses. Additionally, proposed studies should focus on the potential role of vector competence when simultaneously exposed to various arboviruses, and on entomological surveillance and its impact on circulating vector species, with a goal of applying specific measures that mitigate seasonal occurrence or outbreaks. CONCLUSIONS: Multifactorial events may have accounted for the decline in dengue seen in 2017. Differing elements might explain the reduction in dengue including elements of immunity, increased vector control, and even vector and\or viruses changes or adaptations. Most of the results of this expert consensus group meeting are hypothetical and based on limited evidence. Further studies are needed.

OBJECTIF: Depuis les années 1980, l'incidence de la dengue a été multipliée par 30. Cependant, en 2017, il y a eu une réduction notable du nombre de cas d'incidence de dengue rapportés dans les Amériques. Nous voulions fournir des explications plausibles à la baisse en 2017. MÉTHODES: Un groupe d'experts constitué de représentants d'institutions scientifiques et académiques, d'officiels des Ministères de la Santé d'Amérique Latine et de membres du personnel de l'OPS/OMS s'est réuni en octobre 2017 pour proposer et évaluer des hypothèses. RÉSULTATS: En 2017, il y a eu une baisse généralisée de l'incidence, de la sévérité et du nombre de décès dus à la dengue dans les Amériques, accompagnée d'une réduction des cas rapportés d'infections par le virus Zika et par le virus du chikungunya, sans modification dans la répartition entre les groupes d'âge affectés. Il a été déterminé que ce déclin était peu probablement dû aux changements dans les systèmes de surveillance épidémiologique, étant donné que des systèmes de surveillance similaires existaient dans toute la région. Bien que des perturbations soudaines dans la surveillance soient possibles au niveau national ou régional, il est peu probable que cela se produise simultanément dans tous les pays. Une modélisation rétrospective avec des informations épidémiologiques, immunologiques et entomologiques est nécessaire. Des facteurs liés à l'hôte ou immunologiques peuvent avoir influencé le déclin des cas de dengue au niveau de la population par le biais de l'immunité; cependant, l'évidence d'une protection conférée par l'effet du troupeau nécessite des données supplémentaires. Une incertitude subsiste quant à l'effet sur le résultat des infections séquentielles de différents types du virus de la dengue (DENV) et du virus Zika (ZIKV), et vice-versa. Les études à venir devraient examiner (1) l'effet épidémiologique d'une infection antérieure par le DENV sur l'incidence et la sévérité du virus Zika, (2) l'effet épidémiologique d'une infection antérieure par le virus Zika sur l'incidence et la sévérité de la dengue, (3) les corrélats immunitaires basés sur des tests ELISA de nouvelle génération, (4) l' impact d'une infection antérieure à DENV/autres arbovirus sur la réponse immunitaire au ZIKV en fonction du nombre d'infections et de la durée des anticorps en fonction de l'intervalle de protection, (5) si des activités d'intensification de la lutte antivectorielle ont contribué à la diminution de la transmission d'un ou plusieurs de ces arbovirus, (6) le rôle potentiel de la compétence vectorielle lorsqu'ils sont exposés simultanément à différents arbovirus, (7) la surveillance entomologique et son impact sur la circulation d'espèces de vecteurs, dans le but d'appliquer des mesures spécifiques qui réduisent l'occurrence saisonnière d'épidémies. CONCLUSIONS: Des événements multifactoriels pourraient expliquer le déclin observé de la dengue en 2017. La plupart des résultats de cette réunion du groupe de consensus d'experts sont hypothétiques, reposent sur des données limitées et requièrent des investigations supplémentaires.

Caracterización funcional y calidad de vida en pacientes con enfermedad de Parkinson en un hospital de tercer nivel de Bogotá D. C., Colombia / Functional characterization and quality of life in patients with Parkinson's disease in a third level hospital Bogotá D. C., Colombia

Introducción. La enfermedad de Parkinson es considerada la segunda enfermedad neurodegenerativa que más genera discapacidad motora y neuropsiquiátrica; es un trastorno de causa multifactorial cuyo síntoma cardinal es la bradicinesia, seguida de temblor, rigidez e inestabilidad postural, síntomas que impactan la funcionalidad y la calidad de vida del pacien- te. Estudios epidemiológicos muestran que la prevalencia del Parkinson en Colombia es de 4,7 afectados por cada 1.000 personas mayores de 50 años, por lo que es necesario cuantificar el compromiso y las necesidades de atención de estos pacientes. Objetivos. Hacer una caracterización funcional y de la calidad de vida de 60 pacientes con enfermedad de Parkinson atendidos en un hospital de tercer nivel de Bogotá D.C., Colombia, entre noviembre de 2015 y junio de 2016. Materiales y métodos. Estudio de corte transversal con componente analítico realizado en 60 pacientes que cumplieron los criterios de inclusión. Se aplicó el cuestionario de calidad de vida PDQ-39 y la escala de funcionalidad para pacientes con enfermedad de Parkinson MDS- UPDRS. Resultados. El promedio de edad de la muestra fue 67 años, con un rango entre 40 y 84 años, y el 55% eran hombres. El mayor deterioro se evidenció en los dominios de movilidad, activi- dades de la vida diaria, cognición y molestias corporales. Conclusiones. La muestra examinada evidenció un compromiso moderado en la calidad de vida, en los dominios de movilidad y las actividades de la vida diaria. En el aspecto funcional, clínicamente se encontró un compromiso motor en los aspectos de bradicinesia, marcha y rigidez.

Introduction. Parkinson's disease is considered the second neurodegenerative disease that most generates motor and neuropsychiatric disability; it is a multifactorial disorder whose cardinal symptom is bradykinesia, followed by tremor, rigidity and postural instability, symptoms that impact the functionality and quality of life of the patient. Epidemiological studies show that the prevalence of Parkinson's disease in Colombia is 4.7 affected per 1,000 people over 50 years of age, so it is necessary to quantify the commitment and care needs of these patients. Objectives. To make a functional and quality of life characterization of 60 patients with Parkinson's disease attended in a third level hospital in Bogotá D.C., Colombia, between November 2015 and June 2016. Materials and methods. Cross-sectional study with analytical component conducted in 60 patients who met the inclusion criteria. The PDQ-39 quality of life questionnaire and the functionality scale for patients with Parkinson's disease MDS- UPDRS were applied. Results. The average age of the sample was 67 years, with a range between 40 and 84 years, and 55% were men. The greatest impairment was evidenced in the domains of mobility, activities of daily living, cognition and body discomfort. Conclusions. The sample examined showed moderate compromise in quality of life, in the mobility domains and activities of daily living. In the functional aspect, clinically, motor compromise was found in the aspects of bradykinesia, gait and rigidity.

Huntington's disease-like disorders in Latin America and the Caribbean.

Diseases with a choreic phenotype can be due to a variety of genetic etiologies. As testing for Huntington's disease (HD) becomes more available in previously resource-limited regions, it is becoming apparent that there are patients in these areas with other rare genetic conditions which cause an HD-like phenotype. Documentation of the presence of these conditions is important in order to provide appropriate diagnostic and clinical care for these populations. Information for this article was gathered in two ways; the literature was surveyed for publications reporting a variety of genetic choreic disorders, and movement disorders specialists from countries in Latin America and the Caribbean were contacted regarding their experiences with chorea of genetic etiology. Here we discuss the availability of molecular diagnostics for HD and for other choreic disorders, along with a summary of the published reports of affected subjects, and authors' personal experiences from the regions. While rare, patients affected by non-HD genetic choreas are evidently present in Latin America and the Caribbean. HD-like 2 is particularly prevalent in countries where the population has African ancestry. The incidence of other conditions is likely determined by other variations in ethnic background and settlement patterns. As genetic resources and awareness of these disorders improve, more patients are likely to be identified, and have the potential to benefit from education, support, and ultimately molecular therapies.

Consenso de la Asociación Colombiana de Neurología sobre el uso de apomorfina en la enfermedad de Parkinson / Colombian Association of Neurology Consensus on the use of Apomorphine in Parkinson's disease

La apomorfina es un agonista dopa que se viene usando desde hace más 25 años en el tratamiento de la enfermedad de Parkinson avanzada con complicaciones motoras complejas, por lo cual sigue siendo de gran importancia en el tratamiento de esta etapa de la enfermedad. En el siguiente escrito, realizado por el Comité de Movimientos Anormales de la Asociación Colombiana de Neurología, se hace una revisión respecto a la medicación, su eficacia y el papel en el manejo de la enfermedad de Parkinson, así como una comparación entre las diferentes terapias avanzadas disponibles hoy en día. De la misma manera el Comité hace recomendaciones sobre las indicaciones, elección de candidatos y protocolos para el inicio de las diferentes formas de administración (intermitente e infusión continua) para optimizar el uso de esta terapia y facilitar la adherencia al tratamiento. Por otra parte, se revisan los efectos adversos relacionados con la terapia y se hacen recomendaciones sobre el manejo de las mismas, el seguimiento que se debe hacer a los pacientes que reciban apomorfina y las claves en el tratamiento a largo plazo. long term.

Apomorphine is a dopamine agonist that has been used for more than 25 years in the treatment of advanced Parkinson's disease with complex motor complications, becoming an important treatment option for this stage of the disease. In the following document, written by the movement disorders committee of the Colombian Association of Neurology, an extensive review is made about this medication, its efficacy and role in the management of Parkinson's disease as well as a comparison between the different advanced therapies available today. Additionally, recommendations about the indications, election of candidates and protocols for choosing between the different forms of administration (intermittent and continuous infusion) are establish according current evidence in order to help clinicians to optimize the use of this therapy and facilitate adherence to treatment. On the other hand, adverse effects related to the therapy are reviewed and recommendations are made about their management, as well as a protocol to follow-up patients receiving apomorphine and keys in the long term.

Estimación del subregistro de casos de enfermedad por el virus del chikungunya en Girardot, Colombia, noviembre de 2014 a mayo de 2015 / Estimation of underreporting of Chikungunya virus infection cases in Girardot, Colombia, from November, 2014, to May, 2015

Resumen Introducción. En Colombia, la enfermedad causada por el virus del chikungunya se constituyó en una epidemia en el 2015. Se estima que hubo un subregistro del número de casos notificados al sistema de vigilancia, lo cual resulta en sesgos en las proyecciones epidemiológicas que sirven para la adopción de decisiones, un grave problema que no permite apreciar la magnitud y la importancia epidemiológica real de la enfermedad. Objetivo. Estimar el subregistro de los casos de chikungunya en el municipio de Girardot, Cundinamarca, entre noviembre de 2014 y mayo de 2015. Materiales y métodos. Se hizo un estudio descriptivo y retrospectivo mediante encuestas en las viviendas de las 132 manzanas seleccionadas por muestreo aleatorio simple en la búsqueda activa comunitaria, y en el 100 % de los registros individuales de prestación de servicios y del Sivigila mediante búsqueda activa institucional. Los datos se analizaron en el programa EpiInfo, versión 7. Resultados. La tasa de ataque estimada fue de 64,7 %. El subregistro de casos se estimó en 36,1 % por no haber asistido a consulta y, en 24,9 %, por falta de notificación. Según las respuestas de los encuestados, la causa más frecuente para no haber consultado fue la automedicación (n=392; 43 %), seguida del colapso en la prestación de los servicios de salud (207; 23 %). Conclusión. El subregistro general fue del 87,05 %, desde el inicio de la epidemia en Girardot; en este estudio se explica el 60,9 % de este subregistro.

Abstract Introduction: Chikungunya virus infection in Colombia became epidemic in 2015. It is estimated that there is underreporting of cases to the public health surveillance system which can induce bias in epidemiological projections for decision making, a serious problem, as it veils the real magnitude and actual epidemiological importance of this disease. Objective: To estimate the underreporting of cases of chikungunya infection in the municipality of Girardot, Cundinamarca, from November, 2014, to May, 2015. Materials and methods: We conducted a descriptive and retrospective study using surveys in 132 blocks selected by simple random sampling for community active search and the revision of 100% of the individual records of health services and those from the public health surveillance system for institutional active search. The data were analyzed using EpiInfo, version 7. Results: The attack rate was 64.7%. The estimated underreporting was 36.1% for not attending medical consultation while 24.9% of cases were not reported to the public health surveillance system. The principal cause for not seeking medical consultation among those surveyed (n=392; 43%) was self-medication, followed by the collapse of health services (n=207; 23%) Conclusion: The overall underreporting since the beginning of the epidemic in Girardot was 87.05%. This research explains 60.9% of this underreporting.

Caracterización clínica de los pacientes con síncope / Clinical profile of patients with syncope

Resumen Introducción: Se hizo una caracterización clínica de los pacientes con síncope en un Hospital Universitario en Bogotá. Objetivo: Describir las características clínicas de los pacientes con síncope que consultaron al Hospital Militar Central en Bogotá en el período 2012-2015, y analizar la contribución de las ayudas diagnósticas y de las escalas EGSYS y OESIL para orientar el diagnóstico etiológico. Métodos: Se realizó un estudio observacional, descriptivo, de pacientes mayores de 18 años que ingresaron a urgencias del Hospital Militar Central por síncope; se analizaron características clínicas, estudios solicitados y puntajes de las escalas EGSYS y OESIL. Resultados: Se evaluaron 705 historias clínicas, de las cuales 116 fueron excluidas por datos faltantes; la edad promedio fue 58 años y el 46,52% eran mujeres. El 41,6% tenía hipertensión arterial y el 21% enfermedad cardiaca previa. Según el diagnóstico etiológico, 75% fueron clasificados como síncope no cardiaco, 23% como síncope cardiaco y en 2% no se identificó la etiología. El examen más solicitado fue el electrocardiograma (79%), seguido por troponina (63%) y TAC cerebral (58%). Al aplicar las escalas, 60% de los pacientes tuvo un puntaje menor a 3 (EGSYS) y 2 puntos (OESIL), lo que sugería que eran de etiología no cardiogénica/bajo riesgo de mortalidad respectivamente. Conclusiones: La etiología del síncope en la mayoría de los casos fue no cardiaca. El electrocardiograma debe ser solicitado a todos los pacientes con síncope. El uso rutinario de las escalas de riesgo puede contribuir a disminuir la solicitud de estudios no indicados, optimizar el uso de recursos y reducir los días de hospitalización.

Abstract Introduction: A clinical profile was constructed on patients with syncope in a Bogota University Hospital. Objective: To describe the clinical characteristics of patients with syncope that were seen in the Hospital Militar Central in Bogota in the period 2012-2015, as well as to analyse the contribution of diagnostic aids and the Evaluation of Guidelines in Syncope Study (EGSYS) and the Lazio epidemiological syncope Observation (OESIL) scores in order to determine the aetiological diagnosis. Methods: A descriptive observational study was performed on patients over 18 years admitted to the Emergency Department of the Hospital Militar Central due to syncope. An analysis was carried out on the clinical characteristics, examinations requested, and the scores on the EGSYS and OESI L scales. Results: A total of 705 clinical histories were evaluated, of which 116 were excluded due to lack of data. The mean age was 58 years, and 46.52% were women. Arterial hypertension was observed in 41.6%, and 21% had a previous heart disease. According to the aetiological diagnosis, 75% were classified as non-cardiac syncope, 23% as cardiac syncope, and 2% of unknown origin. The most requested examination was the electrocardiogram (79%), followed by troponin (63%), and a computed tomography brain scan (58%). On applying the scales, 60% of the patients had a score of less than 3 (EGSYS) and 2 points (OESIL), which suggested that they were of non-cardiogenic origin/low mortality risk, respectively. Conclusions: The origin of syncope in the majority of cases was non-cardiac. An electrocardiogram must be requested on all patients with syncope. The routine use of risk scales can contribute to reducing the number of non-indicated examinations, as well as optimise the use of resources and reduce hospital stay.

Manejo médico de la distonía / Medical management of dystonia

RESUMEN Para el manejo médico de la distonía se han utilizado tradicionalmente varios fármacos encaminados a disminuir esta condición y a mejorar la calidad de vida. Las terapias orales solas o combinadas proporcionan control parcial de los síntomas y en la mayoría de los casos hay que recurrir a terapias invasivas.

SUMMARY During the last years, several drugs has been tried in order to try to diminish the impact of this condition and improve the quality of life of patients who suffer from dystonia. Oral therapy alone or in combination, generates only partial symptom relief and most of the cases end up requiring other more invasive therapies.

Tratamiento quirúrgico de la distonía / Surgical management for dystonia

RESUMEN A pesar de los recientes avances en la comprensión de los circuitos cerebrales involucrados en la distonía, las técnicas quirúrgicas invasivas y no invasivas han fallado en proporcionar un beneficio substancial a los pacientes que sufren de distonía, en comparación con los resultados observados en la enfermedad de Parkinson, no obstante, la lesionectomía, la estimulación cerebral profunda y el ultrasonido enfocado pueden proporcionar mejoría en los casos refractarios al manejo médico.

SUMMARY Despite recent advances in understanding brain circuits involved in dystonia, surgical techniques both invasive and not invasive have fail to provide substantial benefit to patients suffering from dystonia compared to the results seeing in Parkinson's disease, nonetheless, lesionectomy, deep brain stimulation and focused ultrasound can provide relief in medical refractory cases.