Background: Serious neurological complications of SARS-CoV-2 are increasingly being recognized. Case: We report a novel case of HHV6 myelitis with parainfectious MOG-IgG in the setting of COVID-19-induced lymphopenia and hypogammaglobulinemia. The patient experienced complete neurological recovery with gancyclovir, high dose corticosteroids, and plasma exchange. To our knowledge, this is the first case of HHV6 reactivation in the central nervous system in the setting of COVID19 infection and the first case of MOG-IgG myelitis in the setting of SARS-CoV-2 and HHV6 coinfection. Conclusion: Patients with neurological manifestations in the setting of COVID19-related immunodeficiency should be tested for opportunistic infections including HHV6. Viral infection is a known trigger for MOG-IgG and therefore this antibody should be checked in patients with SARS-CoV-2 associated demyelination.

Rhodococcus equi is an unusual zoonotic pathogen that can cause life-threatening diseases in susceptible hosts. Twelve patients with R. equi infection in Kentucky were compared to 137 cases reported in the literature. Although lungs were the primary sites of infection in immunocompromised patients, extrapulmonary involvement only was more common in immunocompetent patients (P < 0.0001). Mortality in R. equi-infected HIV patients was lower in the HAART era (8%) than in pre-HAART era (56%) (P < 0.0001), suggesting that HAART improves prognosis in these patients. Most (85–100%) of clinical isolates were susceptible to vancomycin, clarithromycin, rifampin, aminoglycosides, ciprofloxacin, and imipenem. Interestingly, there was a marked difference in susceptibility of the isolates to cotrimoxazole between Europe (35/76) and the US (15/15) (P < 0.0001). Empiric treatment of R. equi infection should include a combination of two antibiotics, preferably selected from vancomycin, imipenem, clarithromycin/azithromycin, ciprofloxacin, rifampin, or cotrimoxazole. Local antibiograms should be checked prior to using cotrimoxazole due to developing resistance.

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Introduction: Rhodococcus equi, previously called Corynebacterium equi, is known to cause pneumonia in foals and swine. Although it was known to cause infection rarely in humans, R equi infection in humans has increased with the advent of HIV and increased use of immunosuppressants. Case: We report a case of a 48-year-old male patient with newly diagnosed HIV/AIDS presenting with recurrent R equi bacteremia, pericardial effusion, and pericardial cyst. The infection was treated with drainage of the pericardial effusion and cyst and 2 weeks of intravenous vancomycin and 6 months of oral azithromycin and levofloxacin. Discussion: Rhodococcus equi causes pericarditis and pericardial effusion. It can be effectively treated with debridement, drainage, and a prolonged course of antibiotics. In vitro antibiotic susceptibility should be checked as resistance to antibiotics can develop, especially if drainage is inadequate.

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The novel coronavirus disease 2019 (COVID-19) pandemic has significantly impacted kidney transplantation worldwide. The rate of kidney transplantation decreased during the peak of the COVID-19 pandemic, especially living donor kidney transplantation. Kidney transplant recipients are at high risk of developing severe complications from COVID-19 due to underlying comorbidities and immunosuppressed status. Management of immunosuppression, including the induction therapy and maintenance immunosuppressive regimen, has been modified at many transplant centers during the pandemic. In severe acute respiratory virus syndrome coronavirus 2 (SARS-CoV-2) infected kidney transplant recipients, the immunosuppression is usually reduced. The acute rejection treatment is usually individualized based on the risks and benefits. Several COVID-19 therapies have received emergency use authorization to prevent the progression of COVID-19 severity. Use of oral antiviral therapies is faced with challenges in terms of drug-drug interaction, drug efficacy, and lack of data in the transplant population. For COVID-19 prophylaxis in kidney transplant recipients, the effectiveness of COVID-19 vaccines is lower compared to the general population. Pre-exposure prophylaxis with a long-acting antibody combination may be an adjunct strategy for vaccination in kidney transplant recipients or those for whom COVID-19 vaccination is not contraindicated. Post-exposure prophylaxis remains to be studied. Further studies are necessary to establish standard guidelines of immunosuppressive management in kidney transplant recipients diagnosed with COVID-19 and to better understand the outcomes and adverse drug reactions of the therapeutic and prophylactic modalities including vaccination in this high-risk population.

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