Disfunção neurológica associada à COVID-19 / Neurological dysfunction associated with covid-19

RESUMO A COVID-19 foi declarada pandemia pela Organização Mundial de Saúde no dia 11 de março de 2020. O quadro clínico apresenta predominantemente sintomatologia respiratória, no entanto, na literatura atual, têm sido descritas diversas manifestações neurológicas associadas à infeção por SARS-CoV-2. Os autores apresentam o caso clínico de um homem de 45 anos internado por pneumonia com resultado positivo para SARS-CoV-2, sem antecedentes neurológicos, que, ao décimo sexto dia de internamento, apresentou alteração súbita do estado de consciência acompanhada de desvio conjugado do olhar para a direita e mioclonias da face e da região torácica à esquerda, seguidas de crise convulsiva tônico-clônica generalizada, associadas à hemiparesia esquerda persistente. Do estudo realizado salienta-se a existência de RT-PCR para SARS-CoV-2 no líquido cefalorraquidiano positiva. O doente apresentou evolução clínica com melhoria gradual, tendo o desfecho sido favorável.

ABSTRACT COVID-19 was declared a pandemic by the World Health Organization on March 11, 2020. The clinical presentation is predominantly respiratory symptoms; however, in the current literature, several neurological manifestations associated with SARS-CoV-2 infection have been described. The authors present the clinical case of a 45-year-old man hospitalized for pneumonia with a positive test result for SARS-CoV-2, without a neurological history, who, on the sixteenth day of hospitalization, presented a sudden change in his state of consciousness accompanied by conjugated right gaze deviation and myoclonus of the face and thoracic region to the left, followed by generalized tonic-clonic seizures associated with persistent left hemiparesis. The present study highlights a positive RT-PCR test for SARS-CoV-2 in cerebrospinal fluid. The patient progressed with gradual improvement, and the outcome was favorable.

Neurología hospitalaria y COVID-19: serie de 96 pacientes evaluados en un hospital universitario / Neurology and COVID-19: Case Series of Neurological Complications in 96 patients Admitted at a University Hospital

Background: There are multisystemic consequences secondary to SARS- CoV-2 infection. Aim: To characterize neurological complications in patients admitted due to SARS-CoV-2 infection. Methods: Review of medical records of patients aged over 15 years with COVID-19 evaluated by the neurology team between April and August 2020 at a university hospital. Severity of the infection, referral reasons, neurological diagnoses and laboratory results were registered. The diagnoses were defined by consensus among the members of the hospital neurology group. Cerebrovascular and inflammatory diseases of the central and peripheral nervous system were defined as "probably associated" or "possibly associated" to COVID-19. Results: Ninety-six patients had at least 1 new neu- rological complication. 74% were admitted due to pneumonia and 20% due to a neurological disease. The most common reasons for neurological referral were impaired consciousness (39%), focal neurological deficit (24%), headache (9%) and seizures (5%). The most relevant neurological diagnoses were delirium in 48 patients, stroke in 24, critical illness polyneuropathy and myopathy in 17, seizures in 14, brachial plexopathy in 3, compressive neuropathies in 5, encephalitis in 1, possible vasculitis in 1 and Guillain-Barré syndrome in 1. Stroke and epilepsy were associated with increased length of hospital stay, but without differences in mortality. Conclusions: The spectrum of neurological complications of COVID-19 is wide. There are clinical entities typical of critically ill patients and also diseases associated directly and indirectly with the SARS-CoV2 infection.

Compromiso neurológico en infección por COVID-19 en pacientes pediátricos / Neurologic compromise in pediatric COVID-19 infection

Resumen: La enfermedad por coronavirus ha extendido su compromiso más allá del sistema respiratorio con reportes crecientes de compromiso en diferentes sistemas, uno de ellos, el Sistema Nervioso. El potencial neuroinvasivo de este agente patógeno se explicaría por su neurotropismo dada la presencia de receptores de ACE2 a nivel de encéfalo y médula espinal, además del importante com promiso inflamatorio sistémico. El compromiso neurológico debido a la infección se ha dividido en Sistema Nervioso Central, destacando síntomas inespecíficos y leves como mareos y cefalea, así como cuadros graves con encefalitis y patología cerebrovascular, y Sistema Nervioso Periférico en donde la mayor relevancia guarda relación con la anosmia, ageusia y miositis. A nivel pediátrico el compromiso parece ser menor que en adultos, pero existe un reporte creciente en la literatura respecto a estos hallazgos. Es de gran importancia de contar con un adecuado registro y anamnesis que permita identificar precozmente el compromiso neurológico.

Abstract: Coronavirus disease has extended its involvement beyond the respiratory system, with increasing reports of involving different systems, such as Nervous System. The neuroinvasive potential of this pathogen would be explained by its neurotropism given the presence of ACE2 receptors in the brain and spinal cord, in addition to the important systemic inflammatory involvement. The neu rological involvement due to infection is divided between the central nervous system, highlighting non-specific and mild symptoms such as dizziness and headache, as well as severe symptoms with encephalitis and cerebrovascular pathology, and the peripheral nervous system, which mainly pre sents anosmia, ageusia, and myositis. Clinical symptomatology in pediatric patients seems to be less than in adults, but there is a growing report in the literature regarding these findings. There fore, it is very important to have an adequate registry and anamnesis that allow early identification of neurological involvement.

Neurological manifestations in coronavirus disease 2019 / Manifestaciones neurológicas en la enfermedad del coronavirus 2019

Abstract Coronavirus disease 2019 (COVID-19), an infection caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), is currently hitting the world in the form of a pandemic. Given that some reports suggest that this infection can also occur with neurologic manifestations, this narrative review addresses the basic and clinical aspects concerning the nervous system involvement associated with this disease. More than one third of patients hospitalized for COVID-19 can present with both central and peripheral neurological manifestations. The former includes dizziness and headache, while the latter includes taste and smell disturbances. Other reported neurological manifestations are cerebrovascular disease and epileptic seizures. According to published reports, neurological disorders are not uncommon in COVID-19 and can sometimes represent the first manifestation of the disease; therefore, neurologists should consider this diagnostic possibility in their daily practice. Since maybe not all COVID-19 neurological manifestations are due to SARS-CoV-2 direct effects, it is important to monitor the rest of the clinical parameters such as, for example, oxygen saturation. Similarly, follow-up of patients is advisable, since whether neurological complications may develop lately is thus far unknown.

Resumen La enfermedad del coronavirus 2019 (COVID-19), infección causada por el coronavirus 2 del síndrome respiratorio agudo grave (SARS-CoV-2), actualmente afecta al mundo en forma de una pandemia. Debido a que algunos reportes apuntan a que esta infección puede cursar también con manifestaciones neurológicas, en esta revisión narrativa se abordan los aspectos básicos y clínicos concernientes a la afectación del sistema nervioso por esta enfermedad. Más de un tercio de los pacientes hospitalizados por COVID-19 pueden presentar manifestaciones neurológicas, tanto centrales como periféricas. Entre las primeras se encuentran el mareo y la cefalea; y entre las segundas, las alteraciones del gusto y el olfato. Otras manifestaciones neurológicas reportadas son la enfermedad vascular cerebral y las crisis epilépticas. Según los informes publicados, los padecimientos neurológicos no son infrecuentes en COVID-19 y en ocasiones pueden representar la primera manifestación de la enfermedad, de modo que los neurólogos deberán considerar esta posibilidad diagnóstica en su práctica cotidiana. Dado que no todas las manifestaciones neurológicas de COVID-19 pudieran deberse a efectos directos de SARS-CoV-2, es importante monitorear el resto de los parámetros clínicos, por ejemplo, la oxigenación. De igual forma, es recomendable el seguimiento de los pacientes, ya que hasta el momento se ignora si las complicaciones neurológicas pueden desarrollarse tardíamente.

Role of SARS-CoV-2 neurotropism and neuroinvasion in COVID-19 patients disease severity / Papel del neurotropismo y neuroinvasión de SARS-CoV-2 en la gravedad de los pacientes con COVID-19

Abstract The disease caused by the new SARS-CoV-2 coronavirus (COVID-19) spread rapidly from China to the entire world. Approximately one third of SARS-CoV-2-infected patients have neurological disorders, especially those classified as severe cases and that require mechanical ventilation. On the other hand, almost nine out of 10 patients admitted to an Intensive Care Unit could not breathe spontaneously, thus requiring invasive and non-invasive ventilatory support. So far, whether early neurological disorders such as hyposmia or anosmia, dysgeusia or ageusia, headache and vertigo are significant in the progression to the severe form of the disease or whether they are related to entry to the central nervous system via peripheral nerves has not been determined. Considering the great similarity between SARS-CoV and SARS-CoV-2, and that the severity of the condition that leads to death cannot be explained solely by lung involvement, it is important to determine whether SARS-CoV-2 potential invasion to the central nervous system is partially responsible for the severe respiratory component observed in patients with COVID-19.

Resumen La enfermedad (COVID-19) producida por el nuevo coronavirus SARS-CoV-2 se extendió rápidamente desde China a todo el mundo. Aproximadamente una tercera parte de los pacientes infectados de SARS-CoV-2 presenta alteraciones neurológicas, con mayor frecuencia los clasificados como graves que requirieron ventilación mecánica. Por otro lado, casi nueve de cada 10 pacientes admitidos en una unidad de cuidados intensivos no podían respirar espontáneamente, por lo que ameritaron apoyo ventilatorio invasivo y no invasivo. Hasta el momento no se ha determinado si las alteraciones neurológicas tempranas como la hiposmia o anosmia, disgeusia o ageusia, cefalea y vértigo son significativas en la progresión a la forma grave de la enfermedad y se relacionan con la entrada al sistema nervioso central a través de los nervios periféricos. Considerando la gran similitud entre SARS-CoV y SARS-CoV-2 y que la severidad del cuadro que conduce a la muerte no puede ser explicado únicamente por la afección pulmonar, es importante determinar si la invasión potencial del SARS-CoV-2 al sistema nervioso central es parcialmente responsable del componente respiratorio severo que presentan los pacientes con COVID-19.

Complicações neurológicas associadas ao SARS-CoV-2 (COVID-19) no Brasil: organização do grupo NEUROCOVID-RIO e achados preliminares / Neurological complications associated with SARS-CoV-2 (COVID-19) in Brazil: organization of the NEUROCOVID-RIO group and preliminary findings

We live in moments of uncertainty due to the serious pandemic promoted by the Sars-CoV-2 virus. Furthermore, in our country, other viruses are there, such as H1N1, Dengue, Zika, Chikungunya, Measles, Yellow Fever, which often leave us perplexed by the differential diagnosis of different neurological syndromes that may, eventually, be associated. We created the NEUROCOVID-RIO Group comprising currently 44 health experts from several areas of the neurological sciences from different hospitals and laboratories from various institutions, including public and private universities. A database in which mathematical instruments are applied, including artificial intelligence, was organized. Preliminary findings show that well defined neurological syndromes seems to be more associated to Zika and Chikungunia viruses than with Sars-Cov-2.

Neurological implications of SARS-CoV-2 infection: review of literature / Implicações neurológicas da infecção por SARS-CoV-2: revisão da literatura

The infection caused by the new coronavirus had its first case described in December 2019, in Wuhan, China, and reached a pandemic status in March 2020. Since then, knowledge about the different aspects of this infection has evolved, as well as increased reports concerning related neurological manifestations. Thus, the neurologist assumes a fundamental role in the care of these patients, who may have a clinical phenotype that goes beyond respiratory aspects. In the present study, we highlight the data available in the literature so far regarding the main neurological implications related to COVID-19 infection, in addition to calling attention for some aspects related to patients with previous neurological diseases who contract this infection.

A infecção causada pelo novo Coronavírus teve seu primeiro caso descrito em dezembro de 2019, em Wuhan, China e alcançou o status de pandemia em março de 2020. Desde então, o conhecimento sobre os diferentes aspectos da referida infecção evolui assim como aumentam relatos de manifestações neurológicas relacionadas. Assim, o neurologista assume papel fundamental na assistência desses pacientes, que podem ter um fenótipo clínico que ultrapassa os aspectos respiratórios. No presente estudo, destacamos os dados disponíveis na literatura até o presente momento no tocante às principais implicações neurológicas relacionadas à infecção pelo COVID-19, além de destacar alguns aspectos relativos aos pacientes com doenças neurológicas prévias que contraem a referida infecção.

Demographic characteristics and neurological comorbidity of patients with COVID-19

SUMMARY ABSTRACT The COVID-19 infection that started in the Wuhan Province of the People's Republic of China and has now spread throughout the world is not limited to the respiratory system, but also causes other systemic symptoms through viremia. Recent data show that the central and peripheral nervous system involvement is particularly substantial. Thus, the present study aims to investigate the current neurological comorbidities and symptoms of patients with COVID-19 who were followed up by our clinic physicians.

RESUMO RESUMO A infecção de COVID-19 que começou na província de Wuhan, na República Popular da China, e já se espalhou por todo o mundo não se limita ao sistema respiratório, mas também causa outros sintomas sistêmicos através de viremia. Dados recentes mostram que seus efeitos no sistema nervoso central e periférico são particularmente significativos. Assim, o presente estudo tem como objetivo investigar as atuais comorbidades e sintomas neurológicos de pacientes com COVID-19 que foram acompanhados pelos médicos da nossa clínica.

Neurologic manifestations in emerging arboviral diseases in Rio de Janeiro City, Brazil, 2015-2016

Abstract INTRODUCTION Dengue has affected Rio de Janeiro City since the 1980s. The sequential Zika and chikungunya virus introductions during 2015 aggravated the health scenario, with 97,241 cases of arboviral diseases reported in 2015-2016, some with neurological disorders. METHODS Arbovirus-related neurologic cases were descriptively analyzed, including neurological syndromes and laboratory results. RESULTS In total, 112 cases with non-congenital neurologic manifestations (Guillain-Barré syndrome, 64.3%; meningoencephalitis, 24.1%; acute demyelinating encephalomyelitis, 8%) were arbovirus-related; 43.7% were laboratory-confirmed, of which 57.1% were chikungunya-positive. CONCLUSIONS Emerging arbovirus infections brought opportunities to study atypical, severe manifestations. Surveillance responses optimized case identification and better clinical approaches.

The relationship between atopy and neurological manifestations in HTLV-1 infection

Abstract INTRODUCTION: Human T-cell lymphotropic virus type 1 (HTLV-1)induces exaggerated Th1 responses, whereas atopy is associated with exacerbated Th2 responses. METHODS: Here, a cross-sectional study compared the prevalence of atopy in HTLV-1 carriers and HAM/TSP patients. It also compared the spontaneous cytokine production in HTLV-1-infected individuals. A retrospective cohort study evaluated the development of neurological manifestations in atopic and non-atopic carriers. RESULTS: Atopic HAM/TSP patients with high IFN-γ production exhibited higher IL-5 levels than non-atopic patients. Allergic rhinitis accelerated the development of Babinski signals and overactive bladders. CONCLUSIONS: Abnormal Th1 and Th2 responses coexist in HTLV-1-infected individuals and allergic diseases may worsen the clinical course of HTLV-1 infections.

Potential role of dengue virus, chikungunya virus and Zika virus in neurological diseases

This study showed that laboratory markers of recent infection by dengue, Zika or chikungunya arboviruses were detected in the biological samples of approximately one-third of patients with encephalitis, myelitis, encephalomyelitis or Guillain-Barré syndrome, in a surveillance programme in Piauí state, Brazil, between 2015-2016. Fever and myalgia had been associated with these cases. Since in non-tropical countries most infections or parainfectious diseases associated with the nervous system are attributed to herpesviruses, enteroviruses, and Campylobacter jejuni, the present findings indicate that in tropical countries, arboviruses may now play a more important role and reinforce the need for their surveillance and systematic investigation in the tropics.

Dengue infection in the nervous system: lessons learned for Zika and Chikungunya / Infecção por dengue no sistema nervoso: lições para Zika e Chikungunya

ABSTRACT Dengue, Zika and Chikungunya are emerging arboviruses and important causes of acute febrile disease in tropical areas. Although dengue does not represent a new condition, a geographic expansion over time has occurred with the appearance of severe neurological complications. Neglect has allowed the propagation of the vector (Aedes spp), which is also responsible for the transmission of other infections such as Zika and Chikungunya throughout the world. The increased number of infected individuals has contributed to the rise of neurological manifestations including encephalitis, myelitis, meningitis, Guillain-Barré syndrome and congenital malformations such as microcephaly. In this narrative review, we characterize the impact of the geographic expansion of the vector on the appearance of neurological complications, and highlight the lack of highly accurate laboratory tests for nervous system infections. This represents a challenge for public health in the world, considering the high number of travelers and people living in endemic areas.

RESUMO Dengue, Zika e Chikungunya são arbovírus emergentes e importante causa de doença febril aguda em áreas tropicais. Embora a dengue não represente uma doença nova, houve uma expansão geográfica ao longo do tempo, com o aparecimento de complicações neurológicas graves. A negligência desta situação permitiu a propagação do vetor (Aedes spp) em todo o mundo, que também é responsável pela transmissão de outras infecções pelos vírus Zika e Chikungunya. O grande número de casos infectados contribui para o aumento de manifestações neurológicas incluindo encefalite, mielite, meningite, síndrome de Guillain-Barré e má formações congênitas, como microcefalia. Nesta revisão narrativa, destaca-se o impacto da expansão geográfica do vetor no aparecimento de complicações neurológicas e a falta de testes laboratoriais de elevada acurácia para o diagnóstico da infecção neurológica. Estes aspectos representam desafio para a saúde pública mundial, considerando o grande número de indivíduos que moram ou viajam para áreas endêmicas.

Neurological manifestations of Chikungunya and Zika infections / Manifestações neurológicas das infecções pelos vírus Zika e Chikungunya

ABSTRACT The epidemics of Chikungunya virus (CHIKV) and Zika virus (ZIKV) infections have been considered the most important epidemiological occurrences in the Americas. The clinical picture of CHIKV infection is characterized by high fever, exanthema, myalgia, headaches, and arthralgia. Besides the typical clinical picture of CHIKV, atypical manifestations of neurological complications have been reported: meningo-encephalitis, meningoencephalo-myeloradiculitis, myeloradiculitis, myelitis, myeloneuropathy, Guillain-Barré syndrome and others. The diagnosis is based on clinical, epidemiological, and laboratory criteria. The most common symptoms of ZIKV infection are skin rash (mostly maculopapular), fever, arthralgia, myalgia, headache, and conjunctivitis. Some epidemics that have recently occurred in French Polynesia and Brazil, reported the most severe conditions, with involvement of the nervous system (Guillain-Barré syndrome, transverse myelitis, microcephaly and meningitis). The treatment for ZIKV and CHIKV infections are symptomatic and the management for neurological complications depends on the type of affliction. Intravenous immunoglobulin, plasmapheresis, and corticosteroid pulse therapy are options.

RESUMO As epidemias provocadas pelo vírus Chikungunya (CHIK) e Zika vírus (ZIKV) têm sido consideradas as ocorrências epidemiológicas mais importantes da América. O quadro clínico da infecção por CHIK caracteriza-se por febre alta, exantema, mialgia, cefaléia e artralgia. Além do quadro clínico típico, manifestações atípicas como complicações neurológicas foram relatadas: meningo-encefalite, mielorradiculopatia, mielorradiculite, mielite, mieloneuropatia, síndrome de Guillain-Barre (GBS), entre outras. O diagnóstico é baseado em critérios clínicos, epidemiológicos e laboratoriais. Em relação aos sinais e sintomas da infecção pelo ZIKV, erupção cutânea (principalmente maculopapular), febre, artralgia, mialgia, cefaléia e conjuntivite são os mais comuns. Algumas epidemias que ocorreram recentemente na Polinésia Francesa e Brasil relataram condições mais severas, com envolvimento do sistema nervoso (GBS, mielite transversa, microcefalia e meningite). O tratamento para ZIKV e CHIK é sintomático, e o manejo das complicações neurológicas dependerá do tipo da afecção. Imunoglobulina venosa, plasmaférese, e pulsoterapia com corticosteróides são opções.

Zika virus: what do we know about the viral structure, mechanisms of transmission, and neurological outcomes?

Abstract: The Zika virus epidemic that started in Brazil in 2014 has spread to >30 countries and territories in Latin America, leading to a rapid rise in the incidence of microcephalic newborns and adults with neurological complications. At the beginning of the outbreak, little was known about Zika virus morphology, genome structure, modes of transmission, and its potential to cause neurological malformations and disorders. With the advancement of basic science, discoveries of the mechanisms of strain variability, viral transfer to the fetus, and neurovirulence were published. These will certainly lead to the development of strategies to block vertical viral transmission, neuronal invasion, and pathogenesis in the near future. This paper reviews the current literature on Zika virus infections, with the aim of gaining a holistic insight into their etiology and pathogenesis. We discuss Zika virus history and epidemiology in Brazil, viral structure and taxonomy, old and newly identified transmission modes, and neurological consequences of infection.

Neurological complications in dengue infection: a review for clinical practice / Complicacoes neurologicas na dengue: uma revisao para a pratica clinica

Dengue is an important global public health problem. The World Health Organization estimates that 2/5 of entire world population are in risk of dengue infection. Almost 50 millions cases occur annually, with at least 20 thousand deaths. The etiological agent of this acute febrile disease is a single-strand positive-sense RNA virus of Flavivirus genus. It is an arboviral disease transmitted by Aedes sp. mosquitoes (Aedes aegypti and A. albopictus). Most infected individuals present asymptomatic infection, but some may develop clinical signs. Therefore, a wide spectrum of illness can be observed, ranging from unapparent, mild disease, called dengue fever, to a severe and occasionally fatal dengue hemorrhagic fever/dengue shock syndrome. Currently, neurological manifestations related to dengue infections are increasingly been observed and appears as a challenge for medical practice. In this study the neurological complications of dengue infection will be reviewed, focusing a better understanding of the disease for the clinical practice.

A dengue é um importante problema de saúde pública. A Organização Mundial de Saúde estima que 2/5 da população mundial encontra-se em risco de desenvolver a infecção. Cerca de 50 milhões de casos ocorrem anualmente, com ao menos 20 mil mortes. O agente etiológico desta doença febril aguda é um vírus RNA, do gênero Flavivirus. Este arbovírus é transmitido pelo mosquito Aedes sp. A maioria dos indivíduos infectados apresenta infecção assintomática, porém alguns desenvolvem sintomas clínicos. Estes manifestações podem variar desde uma doença inaparente, branda, conhecida como febre da dengue, até uma forma severa, sendo fatal em alguns casos como na febre hemorrágica da dengue/síndrome de choque da dengue. Atualmente, manifestações neurológicas associadas à dengue são cada vez mais frequentes, tornando-se um desafio na rotina médica. Neste estudo, as complicações neurológicas da dengue serão revisadas, com ênfase na melhor compreensão acerca da doença para a prática clínica.

Human T-cell lymphotropic virus types I and II infections in a cohort of patients with neurological disorders in Belém, Pará, Brazil

Amostras de soro e/ou líquido céfalo-raquidiano (LCR) foram obtidas de 190 pacientes com quadro de doença neurológica crônica e progressiva, com vistas à detecção de anticorpos para os vírus linfotrópicos humanos de células T dos tipos I (HTLV-I) e II (HTLV-II), durante um período de seis anos (1996 a 2001) em Belém, Pará, Brasil. O grupo compreendia ambos os sexos (homens, 52 por cento), com idades variando de 2 a 79 anos (média, 35,9 anos). Tomando-se os resultados como um todo, 15 (7,9 por cento) indivíduos, incluindo 12 (80 por cento) mulheres adultas, apresentaram anticorpos para HTLV-I/II a partir da triagem pelo procedimento imunoenzimático (ELISA). Soros de 14 desses pacientes também foram testados utilizando-se procedimento de Western blot (WB), alcançando-se freqüências de anticorpos para HTLV-I, HTLV-II e dupla reação (HTLV-I e HTLV-II) em 10 (71,4 por cento), 3 (21,4 por cento) e 1 (7,2 por cento) indivíduos, respectivamente. As freqüências anuais de positividade para HTLV-I/II variaram de 2,6 por cento (2001) a 21,7 por cento (2000), em escala crescente no período de 1998 a 2000. Em conjunto, dificuldade na deambulação (n = 5 pacientes), espasticidade (n = 4) e hipotonia crural compreenderam 80 por cento das manifestações clínicas registradas entre os 15 pacientes cujas amostras de soro continham anticorpos para HTLV-I/II, com base em ELISA. Tais resultados oferecem indicadores quanto a uma possível associação do HTLV-I e do HTLV-II à gênese das mielopatias crônicas em Belém, norte do Brasil.