Humoral Response Following Triple Dose of mRNA Vaccines Against SARS-CoV-2 in Hemodialysis Patients: Results After 1 Year of Follow-Up.

Introduction: COVID-19 is associated with an increased mortality in hemodialysis patients. Therefore, achieving a long-lasting effective immune response to SARS-CoV-2 vaccines is essential. This study describes the humoral immune response in hemodialysis patients following three doses of mRNA vaccines against SARS-CoV-2, and explores the factors associated with a sustained immune response. Materials and Methods: We analyzed the monthly serological evolution of SARS-CoV-2 anti-S(RBD) antibodies for 1 year in 178 chronic hemodialysis patients who received three doses of SARS-CoV-2 mRNA vaccines. The primary outcome was sustained effective humoral response defined as anti-S(RBD) levels > 1,000 AU/ml after 4 months from the third dose. Multivariate logistic regression analyses were used to identify features associated with a sustained humoral immune response. Results: After the initial two SARS-CoV-2 mRNA vaccine doses, 77.8% of patients showed an immediate effective humoral response, decreasing to 52.5% after 4 months. Antibody levels were significantly higher in COVID-exposed patients and HBV vaccine responders. After the third dose, 97% of patients showed an effective humoral response, and remained in 91.7% after 4 months. The mean monthly rate of antibody titer decline decreased from 33 ± 14.5 to 25 ± 16.7%. Multivariate regression analysis showed that previous exposure to COVID-19 and response to HBV vaccines were associated with an effective sustained humoral immune response. Conclusion: Immunization with SARS-CoV-2 mRNA vaccines elicits an effective immediate humoral immune response in hemodialysis patients, with a progressive waning in antibody levels. A third booster dose enhances the immune response with significantly higher antibody levels and more sustained humoral immune response. COVID-naïve patients and patients without previous response to HBV vaccines are likely to benefit from receiving more booster doses to maintain an effective immune response.

Vitamin K antagonist-associated microscopic hematuria.

BACKGROUND: Vitamin K antagonists (VKA) are the most widely used anticoagulants for the prevention of thrombotic events. Several renal adverse effects have been associated with the use of VKA. The main aim of our study was to explore the association between international normalized ratio (INR) levels and microscopic hematuria in patients with VKA. METHODS: We performed a cross-sectional study of patients treated with VKA that attended the outpatient clinic for routine INR control. A simple urinalysis was performed on the day of the INR control and the precise number of red cells in the urine sediment was quantified. Demographic data, kidney function tests, comorbidities, anticoagulant dose and concomitant treatment were registered. RESULTS: A total of 337 patients were included with median INR levels of 2.6 (IQR 2.1-3.3). 11.9% of the patients presented microscopic hematuria (≥14 RBCs/µl). There was a significant correlation between INR levels and the number of red blood cells in the urine sediment (r = 0.201, p = 0.024). In the univariate analysis, microscopic hematuria was associated with having an INR >3.5 (19% vs. 10.2%, p = 0.046), bacteriuria (15.2% vs. 3.6%, p = 0.015), leukocyturia (14.8% vs. 6.6%, p =  0.026), hypertension (16.2% vs. 9.5%, p = 0.053), and the use of renin-angiotensin system (RAS) blockers (6.9% vs. 17.2%, p = 0.004). Multivariate logistic regression showed an association between microscopic hematuria and RAS blockade (OR 0.38, CI 95% 0.163-0.886, p = 0.025), independent from INR levels, hypertension, leukocyturia or bacteriuria. CONCLUSIONS: INR overdose was significantly associated with the presence of microscopic hematuria. RAS blockade is an independent protective factor for the presence of microscopic hematuria in anticoagulated patients.

Management of Persistent SARS-CoV-2 Infection in Patients with Follicular Lymphoma.

INTRODUCTION: There is no consensus on the management of the coronavirus disease (COVID-19) in patients with secondary immunosuppression due to either an underlying hematological disease or to the effects of immunochemotherapy (ICT). Some of them may present persistent infection with multiple relapses of COVID-19, requiring several admissions. This study evaluated the clinical characteristics and outcomes after treatment of 5 patients with follicular lymphoma (FL), previously treated with ICT, who developed several episodes of COVID-19. METHODS: We analyzed the clinical evolution and response to treatment with antiviral agent, steroids, and convalescent plasma in 5 patients with FL and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) persistent infection. Reverse transcriptase polymerase chain reaction tests and peripheral blood immunophenotype were performed for all patients. RESULTS: All patients required hospitalization due to pneumonia with severity criteria and were re-admitted after a median of 22 days (13-42) from the previous discharge. They all showed B-cell depletion by immunophenotyping, and no traces of immunoglobulin antibodies against SARS-CoV-2 were detected in any of the cases. The survival rate was 80%. CONCLUSION: The combination therapy evidenced clinical benefits, demonstrating its capacity to control infection in immunosuppressed FL patients treated with ICT.

Plan asistencial coordinado para la eliminación del virus de la hepatitis C en el centro de ayuda integral al drogodependiente (CAID) / Coordinated assistance plan for the elimination of hepatitis C virus at the centro de ayuda integral al drogodependiente (CAID (Comprehensive Care Centre for Drug Addicts))

Introducción: La población que se inyecta droga presenta una alta prevalencia de VHC y elevado riesgo de transmisión. Es prioritario establecer un plan ágil de diagnóstico y tratamiento. Objetivos1) Valorar la efectividad de un nuevo plan asistencial coordinado de derivación desde el Centro de Atención Integral al Drogodependiente (CAID) a atención especializada y 2) conocer la prevalencia del VHC, características clínicas, efectividad y seguridad del tratamiento en esta población. MétodosSe analizaron retrospectivamente 1.300 serologías solicitadas por el CAID entre 1998-2018, se calculó la seroprevalencia de VHC y se valoró la eficiencia del circuito clásico de derivación CAID-atención especializada. Se diseñó un plan asistencial coordinado entre especialistas implicados en el diagnóstico y tratamiento. Desde octubre de 2018 se incluyeron 11 pacientes en el nuevo plan y se comparó el rendimiento de ambos circuitos de derivación. Resultados: Con el circuito clásico, se perdió un 48,2% (83/172) de los pacientes. Un 14,5% (172/1.300) presentaron serología VHC positiva, en comparación con población general OR = 19; IC 95% 14,3-25. La prevalencia de infección activa fue del 80,3% (90/112). Con el nuevo circuito acudieron el 100% (11/11) (p = 0,0003). De los 11 pacientes derivados mediante el nuevo plan, 76,9% (8/11) tenían infección activa y el 100% (8/8) fueron tratados con agentes antivirales directos con éxito. Conclusiones: El nuevo plan asistencial coordinado CAID-atención especializada presenta alta efectividad, en comparación con el circuito clásico de derivación. La seroprevalencia y prevalencia de infección activa en la población del CAID es muy elevada. Los tratamientos con agentes antivirales directos son efectivos y seguros.(AU)

Introduction: The drug-injecting population has a high prevalence of hepatitis C virus (HCV) and high risk of transmission. It is a priority to establish an agile diagnostic and treatment plan. Objectives1) Assess the effectiveness of a new coordinated care plan of referral from the Comprehensive Care Centre for Drug Addicts (CAID) to specialised care and 2) Determine the prevalence of HCV, clinical characteristics, effectiveness and safety of treatment in this population. Methods: 1,300 serologies requested by the CAID between 1998 and 2018 were retrospectively analysed, the seroprevalence of HCV was calculated and the efficiency of the traditional CAID-specialised care referral system was evaluated. A care plan was designed and coordinated among specialists involved in diagnosis and treatment. Since October 2018, 11 patients have been included in the new plan and the performance of both referral systems was compared. Results: With the traditional system, 48.2% (83/172) of the patients were lost. 14.5% (172/1,300) presented positive HCV serology, compared to the general population OR = 19; 95% CI 14.3-25. The prevalence of active infection was 80.3% (90/112). The prevalence of active infection was 80.3% (90/112). Of the 11 patients referred by the new plan, 76.9% (8/11) had active infection and 100% (8/8) were treated with Direct Antiviral Agents successfully. Conclusions: The new coordinated CAID-specialised care plan presents high effectiveness in comparison with the traditional referral system. The seroprevalence and prevalence of active infection in the CAID population is very high. Treatments with Direct Antiviral Agents are effective and safe.(AU)

Coordinated assistance plan for the elimination of hepatitis C virus at the centro de ayuda integral al drogodependiente (CAID (Comprehensive Care Centre for Drug Addicts)). / Plan asistencial coordinado para la eliminación del virus de la hepatitis C en el centro de ayuda integral al drogodependiente (CAID).

INTRODUCTION: The drug-injecting population has a high prevalence of hepatitis C virus (HCV) and high risk of transmission. It is a priority to establish an agile diagnostic and treatment plan. OBJECTIVES: 1) Assess the effectiveness of a new coordinated care plan of referral from the Comprehensive Care Centre for Drug Addicts (CAID) to specialised care and 2) Determine the prevalence of HCV, clinical characteristics, effectiveness and safety of treatment in this population. METHODS: 1,300 serologies requested by the CAID between 1998 and 2018 were retrospectively analysed, the seroprevalence of HCV was calculated and the efficiency of the traditional CAID-specialised care referral system was evaluated. A care plan was designed and coordinated among specialists involved in diagnosis and treatment. Since October 2018, 11 patients have been included in the new plan and the performance of both referral systems was compared. RESULTS: With the traditional system, 48.2% (83/172) of the patients were lost. 14.5% (172/1,300) presented positive HCV serology, compared to the general population OR = 19; 95% CI 14.3-25. The prevalence of active infection was 80.3% (90/112). The prevalence of active infection was 80.3% (90/112). Of the 11 patients referred by the new plan, 76.9% (8/11) had active infection and 100% (8/8) were treated with Direct Antiviral Agents successfully. CONCLUSIONS: The new coordinated CAID-specialised care plan presents high effectiveness in comparison with the traditional referral system. The seroprevalence and prevalence of active infection in the CAID population is very high. Treatments with Direct Antiviral Agents are effective and safe.