Severe Acute Respiratory Syndrome Coronavirus 2 Neutralizing Antibody Titers in Convalescent Plasma and Recipients in New Mexico: An Open Treatment Study in Patients With Coronavirus Disease 2019.

BACKGROUND: Convalescent plasma (CP) is a potentially important therapy for coronavirus disease 2019 (COVID-19). However, knowledge regarding neutralizing antibody (NAb) titers in donor plasma and their impact in patients with acute COVID-19 remains largely undetermined. We measured NAb titers in CP and in patients with acute COVID-19 before and after transfusion through the traditional Food and Drug Administration investigational new drug pathway. METHODS: We performed a single-arm interventional trial measuring NAb and total antibody titers before and after CP transfusion over a 14-day period in hospitalized patients with laboratory-confirmed severe acute respiratory syndrome coronavirus 2 infection. RESULTS: NAb titers in the donor CP units were low (<1:40 to 1:160) and had no effect on recipient neutralizing activity 1 day after transfusion. NAb titers were detected in 6 of 12 patients on enrollment and in 11 of 12 at ≥2 time points. Average titers peaked on day 7 and declined toward day 14 (P = .004). Nab titers and immunoglobulin G levels were correlated in donor plasma units (ρ = 0.938; P < .001) and in the cumulative patient measures (ρ = 0.781; P < .001). CONCLUSIONS: CP infusion did not alter recipient NAb titers. Prescreening of CP may be necessary for selecting donors with high titers of neutralizing activity for infusion into patients with COVID-19. CLINICAL TRIALS REGISTRATION: NCT04434131.

Clinical, laboratory, diagnostic, and histopathologic features of diethylene glycol poisoning--Panama, 2006.

STUDY OBJECTIVE: Diethylene glycol is a toxic industrial solvent responsible for more than 13 mass poisonings since 1937. Little is known about the clinical spectrum, progression, and neurotoxic potential of diethylene glycol-associated disease because of its high mortality and the absence of detailed information in published mass poisoning reports. This incident includes the largest proportion of cases with neurotoxic signs and symptoms. We characterize the features of a diethylene glycol mass poisoning resulting from a contaminated cough syrup distributed in Panama during 2006. METHODS: This was a retrospective chart review and descriptive analysis in a tertiary level, urban health care facility. A case was a person admitted to the Social Security Metropolitan Hospital in Panama City between June 1 and October 22, 2006, with unexplained acute kidney injury and a serum creatinine level of greater than or equal to 2 mg/dL, or unexplained chronic renal failure exacerbation (>2-fold increase in baseline serum creatinine level) and history of implicated cough syrup exposure. Main outcomes and measures were demographic, clinical, laboratory, diagnostic, histopathologic, and mortality data with descriptive statistics. RESULTS: Forty-six patients met inclusion criteria. Twenty-four (52%) were female patients; median age was 67 years (range 25 to 91 years). Patients were admitted with acute kidney injury or a chronic renal failure exacerbation (median serum creatinine level 10.0 mg/dL) a median of 5 days after symptom onset. Forty patients (87%; 95% confidence interval [CI] 74% to 95%) had neurologic signs, including limb (n=31; 77%; 95% CI 62% to 89%) or facial motor weakness (n=27; 68%; 95% CI 51% to 81%). Electrodiagnostics in 21 patients with objective weakness demonstrated a severe sensorimotor peripheral neuropathy (n=19; 90%; 95% CI 70% to 99%). In 14 patients without initial neurologic findings, elevated cerebrospinal fluid protein concentrations without pleocytosis were observed: almost all developed overt neurologic illness (n=13; 93%; 95% CI 66% to 100%). Despite use of intensive care and hemodialysis therapies, 27 (59%) died a median of 19 days (range 2 to 50 days) after presentation. CONCLUSION: A high proportion of patients with diethylene glycol poisoning developed progressive neurologic signs and symptoms in addition to acute kidney injury. Facial or limb weakness with unexplained acute kidney injury should prompt clinicians to consider diethylene glycol poisoning. Elevated cerebrospinal fluid protein concentrations without pleocytosis among diethylene glycol-exposed persons with acute kidney injury may be a predictor for progressive neurologic illness.

Breaking the mold: Insights into the clinical management and outcomes of rhinocerebral mucormycosis in adults.

Background: Rhinocerebral mucormycosis is a rare, life-threatening fungal infection that affects the sinuses, nasal passages, and brain. Its management remains challenging owing to high mortality rates. Combination antifungal therapy is an area of ongoing research aimed at improving outcomes. We aimed to describe the clinical management and outcomes of patients with rhinocerebral mucormycosis who were treated with antifungal combination therapy. Methods: This retrospective case series included 10 patients diagnosed with rhinocerebral mucormycosis at two academic medical centers between January 2008 and July 2023 who received initial antifungal therapy with liposomal amphotericin B (L-AmB), alone or in combination, within 24 h of diagnosis. Clinical data were extracted from the medical records. Results: Most patients were males (70 %) with uncontrolled diabetes (71.4 %). L-AmB was used as the initial therapy in all patients, either as monotherapy (n = 4) or combination therapy (n = 6), followed by posaconazole maintenance. The combinations included L-AmB with posaconazole (n = 4), L-AmB with micafungin (n = 3), or both (n = 3). The overall mortality rate was 50 %. Survivors had high morbidity, with median 31-day hospitalizations and 50 % readmission rate. Conclusions: Despite aggressive management, rhinocerebral mucormycosis has high mortality and morbidity rates. While combination antifungal therapy aims to improve cure rates, our case series showed higher mortality rates than monotherapy. Additional research is warranted to optimize management approaches for this devastating infection.