SARS-CoV-2 Vaccination Rates and Uptake of Tixagevimab-Cilgavimab Among a Cohort of Pediatric Solid Organ Transplant Recipients.

Introduction: There is a lack of data regarding SARS-CoV-2 vaccination rates and tixagevimab-cilgavimab (TC) uptake among pediatric solid organ transplant recipients. The purpose of our study was to assess these rates.

Materials And Methods: We reviewed vaccination records of pediatric recipients of heart, kidney, and liver transplants at Mayo Clinic, Rochester, MN, who received a transplant between January 2011 and December 2021.

Prevention and management of human cytomegalovirus in pediatric HSCT recipients: A review.

Cytomegalovirus (CMV), like other herpesviruses, has the unique ability to establish latent infection with subsequent reactivation during periods of stress and immunosuppression. Herpesviruses cause potentially devastating disease, particularly in hematopoietic stem cell transplant (HSCT) recipients. CMV is especially of concern in HSCT recipients given the high community seroprevalence, high risk of reactivation and high risk of transmission from HSCT donors to recipients causing primary infection after transplantation.

Letermovir as Cytomegalovirus Prophylaxis in a Pediatric Cohort: A Retrospective Analysis.

Letermovir is an attractive cytomegalovirus (CMV) prophylactic agent, but published data in children are scarce. This retrospective chart review aimed to describe our experience using letermovir as CMV prophylaxis in pediatric hematopoietic cell transplantation (HCT) recipients. Pediatric patients (age <20 years) undergoing allogeneic HCT and receiving letermovir prophylaxis in the Mayo Clinic Pediatric Bone Marrow Transplant Program were eligible for inclusion in this retrospective chart review.

A Quality Improvement Project Aimed at Standardizing the Prescribing of Fluconazole Prophylaxis in a Level IV Neonatal Intensive Care Unit.

Introduction: Invasive candidiasis has a high morbidity and mortality among premature neonates. Antifungal prophylaxis with fluconazole significantly lowers the risk of invasive fungal infection in this population. We noted the use of fluconazole prophylaxis in our level IV neonatal intensive care unit (NICU) was variable and sought to standardize prescribing of prophylactic fluconazole.

Live virus vaccination of pediatric solid organ transplant candidates within 1 month prior to transplantation: A multicenter experience.

Background: Solid organ transplant (SOT) recipients are at increased risk of vaccine-preventable illness due to the high degree of immunosuppression required following transplantation. The current recommendation is to vaccinate with live attenuated vaccines, including Measles, Mumps, and Rubella (MMR) and Varicella (VAR) vaccines, at least 4 weeks prior to transplant. However, data to support the time interval between vaccine and transplant are limited.

Proposed Plasma Ammonia Reference Intervals in a Reference Group of Hospitalized Term and Preterm Neonates.

Background: Plasma ammonia is commonly measured in the diagnostic evaluation of hospitalized newborns, but reference values are not well defined.

Methods: We prospectively enrolled newborns admitted to the level III/IV neonatal intensive care unit and level II intermediate special care nursery from January 2017 to January 2018. Infants with inborn errors of metabolism or liver disease were excluded.

Whole-genome sequencing for methicillin-resistant Staphylococcus aureus (MRSA) outbreak investigation in a neonatal intensive care unit.

Objective: To evaluate whole-genome sequencing (WGS) as a molecular typing tool for MRSA outbreak investigation.

Design: Investigation of MRSA colonization/infection in a neonatal intensive care unit (NICU) over 3 years (2014-2017).

Setting: Single-center level IV NICU.

Central Nervous System Blastomycosis in Children: A Case Report and Review of the Literature.

We present a 7-year-old boy with chronic meningitis caused by Blastomyces dermatitidis. A review of the literature revealed 32 cases of central nervous system blastomycosis in children between 1983 and 2016, of which 18 represented parenchymal disease of the brain or spinal cord. Blastomycosis affecting the central nervous system is rare but should be considered in children with chronic meningitis.

Extensive Household Outbreak of Urinary Tract Infection and Intestinal Colonization due to Extended-Spectrum β-Lactamase-Producing Escherichia coli Sequence Type 131.

Background: Reasons for the successful global dissemination of multidrug-resistant Escherichia coli sequence type 131 (ST131) are undefined, but may include enhanced transmissibility or ability to colonize the intestine compared with other strains.

Methods: We identified a household in which 2 young children had urinary tract infection (UTI) caused by an extended-spectrum β-lactamase (ESBL)-producing, multidrug-resistant ST131 E. coli strain.

Optimization of vancomycin dosing in very low-birth-weight preterm neonates.

Objective: To compare vancomycin serum trough concentrations and 24-hour area under the serum concentration-versus-time curve (AUC24) among very low-birth-weight (VLBW) premature infants before and after implementation of an institution-wide increase in neonatal vancomycin dosing.

Study Design: We performed a retrospective analysis of vancomycin concentrations among preterm VLBW neonates before (2007-2010) and after (2010-2013) implementation of a new vancomycin dosing protocol consisting of increased vancomycin daily dose and frequency of administration.

Results: Neonates weighing < 1,500 g and receiving the new vancomycin dosing regimen had lower rates of undetectable trough concentrations (24 vs.

Prevalence of rectal colonization with multidrug-resistant Enterobacteriaceae among international patients hospitalized at Mayo Clinic, Rochester, Minnesota.

Rectal colonization with multidrug-resistant Enterobacteriaceae was found in 23 of 94 consecutively enrolled international patients hospitalized at Mayo Clinic, Rochester, Minnesota. No carbapenemase producers were detected. Twenty-one isolates were extended-spectrum β-lactamase-producing Escherichia coli.

The effect of age and weight on vancomycin serum trough concentrations in pediatric patients.

Background: Vancomycin treatment failure has been associated with low serum vancomycin trough concentrations, prompting recommendations to increase the daily doses in adults and children. Despite more aggressive vancomycin dosing, there continues to be significant variability in vancomycin trough concentrations in pediatric patients.

Methods: To determine if vancomycin trough concentrations in pediatric patients differ by age and weight, we reviewed records of hospitalized patients who received vancomycin between 2008 and 2012.

Characteristics and outcomes of outpatient parenteral antimicrobial therapy at an academic children's hospital.

Background: Use of outpatient parenteral antimicrobial therapy (OPAT) in pediatrics is widespread and may be increasing. Recent data quantifying use and characteristics of pediatric OPAT are lacking.

Methods: To evaluate the number of children receiving OPAT each year and their associated characteristics and outcomes, we conducted a retrospective review of all patients discharged with OPAT from the Mayo Clinic Children's Hospital between August 1, 2010 and December 31, 2011.