The coronavirus disease 2019 (COVID-19) pandemic is challenging health care systems worldwide. People with myotonic dystrophy type 1 (DM1) represent a high-risk population during infectious disease outbreaks, little is known about the potential impact of COVID-19 on patients with DM1. We studied the clinical course of COVID-19 in three hospitalized patients with myotonic dystrophy type 1 or Steinert's disease, between April 1, 2020-April 30-2020. All three had advanced Steinert's disease receiving non-invasive nocturnal home ventilatory support. Two of them lived in a residential care centre. Two patients had a limited respiratory capacity, whereas one patient had a rather preserved functional capacity but more comorbidities. Two out of three patients were obese, none of them had diabetes mellitus. Two patients received hydroxychloroquine. Despite maximal supportive care with oxygen therapy, antibiotics, intensive respiratory physiotherapy and noninvasive positive pressure ventilation, all three patients eventually died due to COVID-19. Our case series of three patients with DM1 admitted for COVID-19 confirms that they are at high risk for severe disease and poor outcome. Clinical trials are needed to define best practices and determinants of outcomes in this unique population.

'Chronic Lyme disease' is a controversial condition. As any hard evidence is lacking that unresolved systemic symptoms, following an appropriately diagnosed and treated Lyme disease, are related to a chronic infection with the tick-borne spirochaetes of the Borrelia genus, the term 'chronic Lyme disease' should be avoided and replaced by the term 'post-treatment Lyme disease syndrome.' The improper prescription of prolonged antibiotic treatments for these patients can have an impact on the community antimicrobial resistance and on the consumption of health care resources. Moreover, these treatments can be accompanied by severe complications. In this case report, we describe a life-threatening ceftriaxone-induced immune hemolytic anemia with an acute kidney injury (RIFLE-stadium F) due to a pigment-induced nephropathy in a 76-year-old woman, who was diagnosed with a so-called 'chronic Lyme disease.'

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