The KAAACI Guidelines for Sublingual Immunotherapy.

Allergen immunotherapy is regarded as the only disease-modifying treatment option for various allergic conditions, including allergic rhinitis and asthma. Among the routes of administration of allergens, sublingual immunotherapy (SLIT) has gained clinical interest recently, and the prescription of SLIT is increasing among patients with allergies. After 30 years of SLIT use, numerous pieces of evidence supporting its efficacy, safety, and mechanism allows SLIT to be considered as an alternative option to subcutaneous immunotherapy.

KAAACI Guidelines for Allergen Immunotherapy.

Allergen immunotherapy (AIT) is a causative treatment for various allergic diseases such as allergic rhinitis, allergic asthma, and bee venom allergy that induces tolerance to offending allergens. The need for uniform practice guidelines in AIT is continuously growing because of the increasing discovery of potential candidates for AIT and evolving interest in new therapeutic approaches. This guideline is an updated version of the Korean Academy of Asthma Allergy and Clinical Immunology recommendations for AIT published in 2010.

Assessment of variables associated with prolonged admission duration in children with Mycoplasma pneumoniae pneumonia.

Introduction: Macrolide-resistant Mycoplasma pneumoniae (MRMP) has become prevalent in children. This study investigated the clinical and laboratory variables of MRMP and macrolide-sensitive M. pneumoniae (MSMP) and identified factors associated with prolonged hospital admission in children.

Analysis of national surveillance of respiratory pathogens for community-acquired pneumonia in children and adolescents.

Background: Respiratory infections among children, particularly community-acquired pneumonia (CAP), is a major disease with a high frequency among outpatient and inpatient visits. The causes of CAP vary depending on individual susceptibility, the epidemiological characteristics of the community, and the season. We performed this study to establish a nationwide surveillance network system and identify the causative agents for CAP and antibiotic resistance in Korean children with CAP.

Effects of Antiviral Therapy and Glucocorticoid Therapy on Fever Duration in Pediatric Patients with Influenza.

: Considering developing resistance against neuraminidase inhibitors (NAIs) and their adverse reactions, restricted use of NAIs and use of alternative drugs should be considered for treating influenza. Although glucocorticoids (GCs) have been used for severe influenza, their effects on non-severe influenza have rarely been evaluated. This study aimed to evaluate the clinical responses to NAI therapy and GC therapy in pediatric patients with non-severe influenza.

One-year changes in the pediatric emergency department caused by prolonged coronavirus disease 2019 pandemic.

Background: With the coronavirus disease 2019 (COVID-19) pandemic lasting for more than a year, it is imperative to identify the associated changes in the use of emergency medical care for efficient operation of the pediatric emergency department (PED). This study was conducted to determine the long-term impact of the COVID-19 pandemic on patterns of PED visits.

Methods: This is a retrospective observational study of visits to the PED of six hospitals, between January 1, 2017, and December 31, 2020.

Macrolide-Resistant and Macrolide-Sensitive Pneumonia in Children Treated Using Early Corticosteroids.

We have found that early corticosteroid therapy was effective for reducing morbidity during five Korea-wide epidemics. We evaluated the clinical and laboratory parameters of 56 children who received early corticosteroid treatment for pneumonia that was caused by macrolide-resistant () or macrolide-sensitive between July 2019 and February 2020. All subjects had dual positive results from a PCR assay and serological test, and received corticosteroids within 24-36 h after admission.

Early Confirmation of Infection by Two Short-Term Serologic IgM Examination.

The aim of the present study is to re-evaluate the clinical application of two-times serologic immunoglobulin M (IgM) tests using microparticle agglutination assay (MAA), an enzyme-linked immunosorbent assay (ELISA), and polymerase chain reaction (PCR) assay in diagnosing (MP) infection. A retrospective analysis of 62 children with MP pneumonia during a recent epidemic (2019-2020) was conducted. The MAA and ELISA immunoglobulin M (IgM) and IgG measurements were conducted twice at admission and around discharge, and MP PCR once at presentation.

Circulating Respiratory Syncytial Virus Genotypes and Genetic Variability of the G Gene during 2017 and 2018/2019 Seasonal Epidemics Isolated from Children with Lower Respiratory Tract Infections in Daejeon, Korea.

Background: Respiratory syncytial virus (RSV) is a major pathogen causing respiratory tract infections in infants and young children. The aim of this study was to confirm the genetic evolution of RSV causing respiratory infections in children at Daejeon in Korea, through G gene analysis of RSV-A and RSV-B strains that were prevalent from 2017 to 2019.

Methods: Pediatric patients admitted for lower respiratory tract infections at The Catholic University of Korea Daejeon St.

Febrile urinary tract infection in children: changes in epidemiology, etiology, and antibiotic resistance patterns over a decade.

Background: Understanding the epidemiology and prevalence of febrile urinary tract infection (fUTI) in children is important for risk stratification and selecting appropriate urine sample collection candidates to aid in its diagnosis and treatment.

Purpose: This study aimed to analyze the epidemiology, etiology, and changes in antibiotic susceptibility patterns of the first fUTI in children.

Methods: This retrospective observational cohort study included children younger than 19 years of age who were diagnosed and treated for their first fUTI in 2006-2016.

Level of interleukin-18 binding protein is significantly different in patients with anaphylaxis than urticaria.

Background: Acute urticaria is a common cutaneous disease encountered in children, while anaphylaxis can show cutaneous symptoms as well as systemic symptoms. One study found that urticaria tends to precede anaphylaxis, but studies on the different role of eosinophils and related cytokines in anaphylaxis and urticaria are lacking.

Objective: The aim of this study was to compare the clinical features, total eosinophil count, serum levels of interleukin (IL)-18, IL-18 binding protein (BP), IL-1 receptor-like (RL) 1, and IL-33 and compare with tryptase to examine if any differences could be found between patients who experienced anaphylaxis and urticaria.

Early Corticosteroid Therapy for Pneumonia Irrespective of Used Antibiotics in Children.

Antibiotics' effect on (MP) infection still remains controversial. A prospective study of 257 children with MP pneumonia during a recent epidemic (2015-2016) was conducted. All MP pneumonia patients were treated with corticosteroids within 24-36 h after admission.

Nasal eosinophilia and eosinophil peroxidase in children and adolescents with rhinitis.

Background: Researchers have shown that eosinophil peroxidase (EPO) is a relatively accurate marker of eosinophilia and eosinophil activity. However, its use as a marker of eosinophilic inflammation in nasal secretions is limited because the diagnostic cutoff values of EPO for use as a one-time test for allergic diseases such as allergic rhinitis have not been established.

Purpose: To identify the correlation between nasal eosinophil count and EPO in children and adolescents with rhinitis.

Epidemiological relationship between pneumonia and recurrent wheezing episode in children: an observational study at a single hospital in Korea.

Objective: This study was aimed to evaluate epidemiological and clinical relationship between (MP) infection and childhood recurrent wheezing episode (RWE).

Design: Retrospective case note review.

Setting: Paediatric department at a single Korean institution.

Foreign body removal by flexible bronchoscopy using retrieval basket in children.

Objectives: Aspiration of foreign bodies into the tracheobronchial tree is a common accident in children. This study aimed to evaluate the safety and outcome of foreign body removal by flexible bronchoscopy using a retrieval basket in children.

Methods: This was a retrospective study of children treated for foreign bodies in the airway via flexible bronchoscopy using a retrieval basket at a tertiary hospital in Korea between February 2014 and October 2017.

Effects of Methylprednisolone Pulse Therapy on Refractory Mycoplasma pneumoniae Pneumonia in Children.

Purpose: Mycoplasma pneumoniae (M. pneumoniae) is one of the most common causes of community-acquired pneumonia in children. The clinical course is typically self-limited and benign; however, rare cases of severe pneumonia can develop despite appropriate antibiotic therapy.

Secondary renal amyloidosis in a 13-year-old girl with bronchiectasis.

A 13-year-old girl was diagnosed with non-cystic fibrosis (CF)-related multifocal bronchiectasis accompanied by nephrotic-range proteinuria of unknown cause. On renal biopsy, there were many segmental homogeneous deposits of amyloid tissue with positive Congo red staining in the glomeruli and interstitium. On electron microscopy, relatively straight, non-branching, randomly arranged amyloid fibrils were showed in the mesangium of the glomeruli.