In Depth Viral Diversity Analysis in Atypical Neurological and Neonatal Chikungunya Infections in Rio de Janeiro, Brazil.

Chikungunya virus (CHIKV) is an arthropod-borne virus (arbovirus) transmitted by Aedes mosquitoes. The human infection usually manifests as a febrile and incapacitating arthritogenic illness, self-limiting and non-lethal. However, since 2013, CHIKV spreading through the tropics and to the Americas was accompanied by an increasing number of cases of atypical disease presentation, namely severe neuropathies and neonatal infection due to intrapartum vertical transmission. The pathophysiological mechanisms underlying these conditions have not been fully elucidated. However, arbovirus intrahost genetic diversity is thought to be linked to viral pathogenesis. To determine whether particular viral variants could be somehow associated, we analyzed the intrahost genetic diversity of CHIKV in three infected patients with neurological manifestations and three mothers infected during the intrapartum period, as well as their babies following vertical transmission. No statistically supported differences were observed for the genetic variability (nucleotide substitutions/gene length) along the genome between the groups. However, the newborn and cerebrospinal fluid samples (corresponding to virus passed through the placenta and/or the blood-brain barrier (BBB)) presented a different composition of their intrahost mutant ensembles compared to maternal or patient serum samples, even when concurrent. This finding could be consistent with the unidirectional virus transmission through these barriers, and the effect of selective bottlenecks during the transmission event. In addition, a higher proportion of defective variants (insertions/deletions and stop codons) was detected in the CSF and maternal samples and those were mainly distributed within the viral non-structural genes. Since defective viral genomes in RNA viruses are known to contribute to the outcome of acute viral infections and influence disease severity, their role in these atypical cases should be further investigated. Finally, with the in silico approach adopted, we detected no relevant non-conservative mutational pattern that could provide any hint of the pathophysiological mechanisms underlying these atypical cases. The present analysis represents a unique contribution to our understanding of the transmission events in these cases and generates hypotheses regarding underlying mechanisms, that can be explored further.

Premature Ovarian Failure Related to SARS-CoV-2 Infection.

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection is known to have a wide spectrum of effects on the respiratory, cardiac, neurological, hematopoietic, gastrointestinal, ocular and urological systems, but there is very little information on its effects on the human ovary. Our aims are to describe a unique case that developed amenorrhea during and after SARS-CoV-2 infection and to push researchers to do more researches to understand the effects of SARS-CoV-2 infection on the ovaries. A 27-year-old female patient presented with amenorrhea. She had fever on the second day of the menstrual cycle, and her cycle had been interrupted on the same day. The patient had a sub-febrile temperature, myalgia, fatigue, sweating, loss of appetite, and mild sleep disorder. Based on clinical, laboratory, and reverse transcription polymerase chain reaction (RT-PCR) data of a nasopharyngeal swab sample, she had a positive result for SARS-CoV-2 infection. Till now there are limited publications on the effect of SARS-CoV-2 infection on the ovaries. In particular, the potential adverse effects of SARS-CoV-2 infection on fertility are unclear. Coronavirus disease 2019 (COVID-19) patients need to be followed up for a long time, and clinicians need to pay attention to menstrual disturbances, especially in young female patients. More evidence, through both epidemiologic and clinical studies, as well as long-term follow-up studies, is needed to understand the impact of this infection on the human ovary, especially in reproductive-aged women.

Atypical Manifestations of Severe Acute Respiratory Syndrome Coronavirus 2 Infection in Children: A Systematic Review.

BACKGROUND: In December 2019, a local outbreak of pneumonia was presented in Wuhan (China) and quickly identified to be caused by a novel coronavirus, Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2). The disease caused by SARS-CoV-2 was named COVID-19 and was soon declared a pandemic because of the millions of infections and thousands of deaths worldwide. Children infected with SARS-CoV-2 usually develop the asymptomatic or mild type of disease compared to adults. They are also more likely to have atypical and non-specific clinical manifestations than adults. METHODS: A literature search was performed through PubMed and Scopus to summarize the extrapulmonary manifestations of SARS-CoV-2 infection in children since the beginning of the pandemic. Peer-reviewed papers in English were retrieved using the following keywords and combinations: 'pediatric,' 'child,' 'infant,' 'neonate,' 'novel coronavirus,' 'SARS-CoV-2,' 'COVID 19' and 'gastrointestinal,' 'renal,' 'cardiac,' 'dermatologic' or 'ophthalmologic'. We included published case series and case reports providing clinical symptoms and signs in SARS-CoV2 pediatric patients. RESULTS: Although fever and symptoms of upper respiratory infection are the most frequently presented, a variety of other atypical presentations has also been reported. The clinical spectrum includes dermatological, ophthalmological, neurological, cardiovascular, renal, reproductive, and gastrointestinal presentations. In addition, a rare multi-inflammatory syndrome associated with SARS-- CoV-2 infection has been reported in children, often leading to shock and requiring inotropic support and mechanical ventilation. CONCLUSION: Clinicians need to be aware of the wider range of extrapulmonary atypical manifestations of SARS-CoV-2 infection in children, so that appropriate testing, treatment, and public health measures can be implemented rapidly.

Supporting and Protecting People with Dementia in the COVID-19 Pandemic.

We aimed to explore the awareness and preparedness of dementia caregivers and people with mild cognitive deficits on how to prevent COVID-19 infection and cope with the indirect consequences of the pandemic. A total of 139 patient-caregiver dyads received a telephone survey and 109 completed the survey. The majority of respondents reported having a moderate-to-good knowledge of the typical manifestations of COVID-19. Conversely, only few of them were informed of the atypical presentations and on how to recognize emergency warning signs. Filling the knowledge gaps on COVID-19 in the most vulnerable people may represent a significant resource to tackle the pandemic.

Hiccups and psychosis: two atypical presentations of COVID-19.

The WHO defines a possible case of COVID-19 as a person experiencing fever, cough, shortness of breath, and neurological signs including anosmia, ageusia, or dysgeusia. However, experiences from hospitals all over the world have shown that presentations vary widely. Some atypical presentations include cardiac, gastrointestinal, neurological, and cutaneous and while some are driven by the inflammatory response, others are a consequence of the hypercoagulable state. In our emergency department in a private hospital in Mexico City, we received two patients with very different symptoms on the same shift. Two previously healthy men in their 40s presented to the ER with very atypical manifestations of COVID-19. Neither of them complained of fever, cough, or shortness of breath. The first referred a 3-day history of hiccups that had not resolved with metoclopramide. The second presented with an acute episode of altered mental status. While the first case revealed lung involvement of the disease, the second case had a clean chest CT scan. These cases are relevant as manifestations of COVID-19 vary widely, especially in previously healthy young adults.