Tract Infections In Children Research Articles

Overview of Pediatric Respiratory Syncytial Virus (RSV) infections: has risk perception for RSV changed in children with comorbid conditions?

Respiratory syncytial virus (RSV) is the primary etiology of lower respiratory tract infection in children. The fluctuating incidence of RSV, particularly in light of the COVID-19 pandemic, has shifted the spotlight onto preventive strategies. Our study aims to investigate both the risk factors and clinical symptoms of RSV. From February 2015 to February 2023, samples were analyzed during all seasons to identify viral respiratory infections. RSV was identified in a total of 835 individuals. In 2021, following the easing of limitations after the COVID-19 pandemic, the largest number of identified cases was recorded. January was the most commonly used month. The median age were 5 months (min-max: 1-204 months) and 128 (17.7%) cases had a history of prematurity. Around 24.7% of the patients had a preexisting medical condition. Neurological disease patients were followed up in the intensive care unit more often than others (53.3 vs. 35.8% p = 0.036). While the hospital stay of pediatric patients born under the 29th week of gestation is almost twice as long compared to other groups, the hospital stay is almost twice as long as that of patients between 29 and 32 weeks. (p = 0.046, p = 0.012 respectively). RSV was a powerful companion during the pandemic and a persistent reminder of its severity. Our initial data suggest that RSV prevention is difficult for children with pre-existing diseases, notably neurological abnormalities, who are not advised for preventive treatments. Given this outcome, late-premature newborns and children with medical issues should receive RSV prophylaxis first.

Innate immunity of the urothelium: A new step in decoding pathogenesis and improving therapeutic strategy for recurrent urinary tract infections in children

Innate immunity of the urothelium: A new step in decoding pathogenesis and improving therapeutic strategy for recurrent urinary tract infections in children

Bromelain Supplementation in the Management of Otitis Media with Effusion in Children

Background/Objectives: The respiratory system is prone to infectious diseases, especially in children below five years of age. Upper respiratory tract infections in children are often associated with Eustachian tube dysfunction and complicated by otitis media with effusion (OME), an inflammatory process within the middle ear, which can lead to hearing loss. Treatment for these infections involves a combination of medication and symptom relief, depending on the severity and cause of the infection. In recent years, natural therapeutic drugs derived from herbal medicines have been gaining popularity in treating various pathologies. Bromelain, one of the most studied natural compounds, has been investigated extensively due to its numerous pharmacological properties, offering a potential new avenue for treatment. Based on these promising findings, our study was designed to examine the efficacy of supplementation with bromelain in countering symptoms associated with OME. Methods: This study was conducted on data acquired from medical records from the Section of Audiology of the University of Palermo, focusing on the period of January 2022 to June 2023 and selecting 224 children (age range 1–8 years), namely 174 males and 50 females, who were evaluated for presumed OME at the audiology pediatric ambulatory. All patients selected before initiating pharmacological treatment underwent thorough screening regarding the functionality of the tympanic cavities, otoacoustic emissions, the auditory threshold, and the ear canal’s integrity. Results: The preliminary findings of this study are significant, demonstrating that supplementation with bromelain led to notable improvements in the symptoms accompanying OME after 15 days and 60 days of therapy. Notably, patients who received the bromelain supplement reported reduced mucus secretions and improved auditory function. Conclusions: These results underscore the potential of naturally occurring compounds as adjuvants to standard therapeutic strategies in treating OME.

Analysis of the incidence of influenza and acute upper respiratory tract infections under conditions of routine influenza vaccination

Background. Acute upper respiratory tract infections and influenza, while maintaining high epidemiological, social and economic significance, have a major effect on the public health of countries and individual regions.The aim. To study the impact of influenza vaccination on the manifestations of the epidemic process of influenza and acute upper respiratory tract infections in the Irkutsk region.Materials and methods. Epidemiological analysis of the incidence of acute upper respiratory tract infections and influenza, analysis of influenza mortality and the impact of vaccination on these infections were performed using continuous samples of statistical data from the Directorate of Rospotrebnadzor in the Irkutsk Region for the period of 2003–2022 (forms 2, 5).Results. The intensity of the epidemic process of acute upper respiratory tract infections among the general population, children and adults during the observation period was characterized by an uneven course with a tendency towards increase. The dynamics of the incidence of acute upper respiratory tract infections in children and adults demonstrates multidirectional trends over the compared periods. The incidence of influenza in the general population had a steady downward trend, the decrease rate was –8.4 %. At the same time, there are significant changes in the intensity of the epidemic process in the compared periods. The proportion of adults increased in the structure of cases of acute upper respiratory tract infections, and the proportion of children increased in the structure of cases of influenza. Significant changes in the epidemic seasons of influenza are shown. Since the beginning of routine influenza vaccination in the region, the number of vaccinated people has increased annually – from 23.6 to 61.7 % of the population. Against the background of the influenza vaccination campaign, a statistically significant decrease in the incidence of acute upper respiratory tract infections among the general population and children under 14 years of age was registered (p < 0.01).Conclusion. In the Irkutsk region, the epidemiological disadvantage for the studied infections persists. Increasing the regulated indicators of population coverage with preventive influenza vaccinations (75 % and more) will help reduce the incidence rate.

Clinical Study of Vitamin D Levels in Hospitalized Children with Acute Respiratory Infections.

The aim of our research was to evaluate and analyze serum 25(OH) vitamin D and parathyroid hormone (PTH) levels to investigate whether vitamin D deficiency serves as a risk factor for an increased incidence of acute respiratory infections (ARI) in children. Serum PTH levels were used as an indicator of vitamin D sufficiency, as normal PTH levels require an optimal concentration of 25(OH) vitamin D. The study included 129 children, divided into five subgroups: children with acute bronchopneumonia (n = 42), acute laryngotracheitis (n = 7), acute bronchiolitis (n = 32), acute bronchitis (n = 18), and a control group (n = 30). No statistically significant differences in 25(OH)D levels were observed between the overall population of children with ARI and the control group (p = 0.073). However, significant differences in 25(OH)D levels were identified between the control group and children with bronchopneumonia, acute bronchitis, and laryngotracheitis (p < 0.01, p < 0.05). Regarding PTH levels, statistical significance was found between the control group and the acute bronchiolitis group, due to the high percentage of children with hypervitaminosis in this subgroup. These results highlight the crucial role of vitamin D in the onset and progression of acute respiratory tract infections in children, emphasizing its impact on their overall respiratory health.

Analysis of the potentially pathogenic bacteria of lower respiratory tract infections in children per-, during and post-COVID-19: a retrospective study

Analysis of the potentially pathogenic bacteria of lower respiratory tract infections in children per-, during and post-COVID-19: a retrospective study

Urinary Tract Infection in Children: An Up-To-Date Study.

Urinary tract infections (UTIs) are common bacterial infections in children. UTIs may be limited to the bladder or involve the kidneys with possible irreversible damage. Congenital abnormalities of the kidney and urinary tract (CAKUT) are often associated with UTIs; kidney scars have been considered a consequence of untreated UTIs but may be congenital. The mechanism by which bacteria produce inflammation in the urinary system has been intensively investigated. Diagnostic tools, including invasive imaging procedures, have been advocated in infants and small children with UTIs but are not necessary in most cases. Effective antibiotic drugs are available, and prophylactic treatment has been questioned. Several guidelines on UTIs are available, but a simple one for general practitioners is needed.

Decreasing the Use of Cefdinir for Pediatric Urinary Tract Infections in a Rural Health Care System: A Quasi-experimental Study.

There are several antimicrobial options for treating urinary tract infection in children. Although cefdinir is commonly used, better options exist. We developed an intervention bundle to reduce the use of cefdinir in favor of cephalexin. The intervention bundle decreased cefdinir use by 19.1% while use of cephalexin increased by 19.8%.

Factors Influencing the Incident of Acute Respiratory Tract Infections in Children Aged 12-59 Months in Wallandimu East Nusa Tenggara

Background: Acute Respiratory Infection Disease is one of the highest causes of morbidity and mortality in children under five in Indonesia, especially in East Nusa Tenggara. The implementation of the ISPA disease control program focuses on finding and treating sufferers as early as possible by involving the active role of cadres, integrated health service support and referrals to related health facilities, however, these control efforts have not shown significant results. Purpose: The aim of this study was to determine the factors that influence the incidence of Acute Respiratory Infection Disease in children aged 12-59 months in the Wallandimu Community Health Center working area. Method: This research uses an analytical research design with a cross sectional approach. The population in this study were toddlers aged 12-59 months in the Wallandimu health center working area and the sample in this study was 30 toddlers. The sampling technique in this research was simple random sampling. The Chi-Square statistical test was used to determine the relationship between variables. Results: The results of the research from 18 respondents showed complete immunization status (76.7%), poor nutritional status (60.0%), and insufficient knowledge (56,7%) regarding the incidence of ISPA in the Wallandimu Health Center working area. The results of bivariate analysis showed no influence between immunization status and the incidence of ISPA (p= 0.896 &gt; 0.05), there was an influence between nutritional status and the incidence of ISPA (p= 0.007 &lt; 0.05), there was an influence between maternal knowledge and the incidence of ISPA (p = 0.010 &lt; 0.05). Conclusion: It is hoped that the Wallandimu Community Health Center will further improve its health programs, especially the Acute Respiratory Infection Disease control program for toddlers and provide education regarding maternal knowledge and the dangers of malnutrition for toddlers, so that the incidence of Acute Respiratory Infection Disease in children aged 12-59 months will decrease.

Assessment of Urinary Tract Infection and Estimation of Procalcitonin Serum Level Among Iraqi Children

Urinary tract infections (UTIs) considered as a serious public health issue, especially in children, which can be caused by a variety of organisms, especially gram-negative bacteria. Procalcitonin (PCT) is a precursor of the calcitonin hormone, which normally released in the thyroid gland, and this biomarker has become more effective in diagnosing bacterial infections in the last decade. Moreover, to establish the utility of procalcitonin for predicting urinary tract infections in children. The current study included two groups of patients of approximately sixty cases from patients with urinary tract infection (UTI), besides, sixty cases from healthy individuals. Samples were collected from Al Imamain Al-Kadhimain Medical City in Baghdad. The result showed a highly significant difference in procalcitonin levels in UTI patients compared to the control group. The results of this investigation support the use of PCT as an indicator for the diagnosis of UTI children.

How have respiratory tract infections changed in the post-covid era for children under 5 years?

Abstract Background Social distancing measures introduced in response to the covid-19 pandemic reduced transmission of all respiratory pathogens. Exposure to respiratory pathogens in early life affects future lung health. We aimed to describe changes in the incidence of respiratory tract infections (RTIs) in children &amp;lt;5 years in England in the post-pandemic era. Methods Population-based retrospective cohort study using electronic health records. We included all children aged &amp;lt;5 years registered with a primary care practice from April 2016 to March 2023. We compared monthly GP consultation rates for RTIs in the two post-pandemic years (April 2021 - March 2022 and April 2022 - March 2023) with corresponding months during pre-pandemic years (April 2016 - February 2020). Results There were 3 045 701 respiratory tract infections among 2 894 539 children &amp;lt;5 years registered with a GP practice during the study period. Pre-pandemic, monthly RTI rates varied from lows of 29.1 per 100 child-years in August to highs of 108.8 per 100 child-years in November. In 2021/22, monthly RTI rates were bimodal peaking in June and October, although the winter peak was lower than pre-pandemic years and mean monthly RTI rates were ∼15% lower overall. In 2022/23 mean monthly RTI rates remained ∼15% lower than pre-pandemic years, but there was a single peak in December 2022 of 117.6 RTIs per 100 child-years, exceeding the pre-pandemic winter peaks by 8.1%. Conclusions Overall, monthly RTIs in post-pandemic years were 15% lower than pre-pandemic years. However, there was a concerning peak in December 2022 that exceeded the winter peaks from previous years. Comparisons with national surveillance data suggest this peak reflects changes in RTI incidence, particularly among group A streptococcal infections, but this peak may also reflect changes in access to care or healthcare seeking behaviour. Continued monitoring of post-pandemic seasonal patterns will assist in planning for health service use. Key messages • Respiratory tract infections in children &amp;lt;5 years in post-pandemic years were 15% lower than pre-pandemic years, but winter peaks in incidence may be of greater magnitude in the post pandemic era. • Ongoing monitoring of patterns of respiratory tract infections in young children is important for future health service planning and delivery.

Value of Urinary Neutrophil Gelatinase-Associated Lipocalin in Diagnosing Urinary Tract Infections in Children: A Systematic Review and Meta-Analysis.

This study presents a comprehensive review of the literature regarding the use of urinary neutrophil gelatinase-associated lipocalin (uNGAL) as a diagnostic tool for urinary tract infection (UTI) in children. Meta-analysis was conducted to evaluate the effectiveness of uNGAL in diagnosing UTI and differentiating acute pyelonephritis (APN) from other sites infection in pediatric patients. We searched PubMed, Web of Science, the Cochrane Library and EMBASE for reports published up to January 2023. We only included published literature that addressed the diagnosis of UTI and APN with the use of uNGAL in children aged 0-18 years. Two authors independently reviewed the included studies and extracted the corresponding data according to the inclusion and exclusion criteria. The sensitivity, specificity and area under the curve for each study were pooled by using a bivariate mixed-effects model. A total of 13 studies met the inclusion criteria for this review: 8 reported on uNGAL diagnosis of UTI, 2 on uNGAL diagnosis of APN, and 3 on both UTI and APN. Among all included studies, uNGAL had good sensitivity (0.88, 95% CI 0.79-0.94) and good specificity (0.86, 95% CI 0.78-0.92) for the diagnosis of UTI. The sensitivity and specificity of uNGAL for the diagnosis of APN were 0.79 (95% CI 0.72-0.85) and 0.78 (95% CI 0.50-0.93), respectively. uNGAL has good sensitivity and specificity in the diagnosis of UTI in children and is a promising marker. However, the use of uNGAL still does not provide significant advantages in the diagnosis of APN in children. Consequently, there is a need to optimize and further explore the assay for improved diagnostic accuracy.

A Multicenter, Longitudinal Maternal and Birth Cohort Study in Latin America to Assess Prevalent Respiratory Tract Infections in Children from 0 to 5 Years of Age. The MINERVAL Study

Abstract Background A maternal and birth cohort study can assess the etiology and clinical course of lower respiratory tract infections and offers the opportunity to evaluate the relationship between sociodemographic, clinical, host characteristics and disease severity. In Latin America, a consortium of clinical research centers in Colombia and Panama has demonstrated its ability to conduct long-term longitudinal studies involving active surveillance of thousands of children with consistent retention rates. The MINERVAL cohort study aims to estimate the incidence, etiology, severity, and burden of lower respiratory tract infections (LRTI) and to identify microbiome and transcriptome profiles to help predict risk and assess disease severity in children from birth to 5 years of age. Methods We are establishing a maternal/birth cohort study in four sites (Cali, Bogota, Barranquilla and Panama), and will be recruiting 542 participants per center. Enrolled pregnant women between 24 and 27 weeks of gestation, and newborns under 4 weeks of age, will be closely followed with active surveillance weekly during the first 2 years for early detection of LRTI. Monthly telephone follow-up calls will continue until five years of age to assess the development of long-term respiratory morbidity and complications, including recurrent wheezing episodes. Clinical samples (NP swabs -for respiratory pathogen detection and microbiome analysis-, and blood -for cytokine and transcriptome analysis-) will be obtained in pregnant women, and in infants in the first 4 weeks of life and every 6 months for two years. Women and children who develop LRTI during the longitudinal follow-up will be evaluated clinically and samples will be collected. Results This cohort will provide prospective data and biological samples at crucial stages of children’s development, to allow estimation of the incidence and burden of LRTI by age and etiology, and the identification of risk factors and possible targets for intervention. Furthermore, the use of transcriptional profiling will allow early identification of variables to predict and guide clinical management in children, the use of antivirals and monoclonal antibodies, and to prioritize the population to be vaccinated according to age and risk factors. Conclusion The establishment of observational maternal and birth cohorts in Latin America could provide information to guide the development of strategies to prevent and mitigate the impact of respiratory tract infections in young children. Collaboration among investigators in the region and partnerships with international investigators optimizes resources and allows standardization of good surveillance practices, data exchange and the generation of new knowledge for future studies.

Antibiotic Appropriateness for Urinary Tract Infections in Children.

We examined local prescribing patterns across the entire treatment course for children treated for uncomplicated urinary tract infection (UTI) to determine opportunities for antibiotic stewardship initiatives. We conducted a retrospective review of emergency department and inpatient encounters for febrile and afebrile UTI in a children's hospital from 2021 to 2022. An antibiotic spectrum ranking was established, and providers' choices were assessed for appropriateness on the basis of the individuals' urine culture (UCx). Groups were stratified by fever presence and compared using χ2, Fisher's exact, and Mann-Whitney U tests. Of 172 encounters (83% emergency department), 99 (58%) had a positive UCx. Eighty (80%) grew Escherichia coli, with 67 (84%) being susceptible to cefazolin (minimum inhibitory concentration ≤16 mg/L). There were 229 antibiotic regimens and 39 (17%) were appropriate. Inappropriate antibiotic choices included unnecessary use of broad-spectrum antibiotics and misdiagnosed UTI. Grouping by encounter, at least 1 dose of a third cephalosporin was given in 51% of encounters, and 80% of these received it unnecessarily because of UTI misdiagnosis or suitability of a narrower-spectrum antibiotic. The median prescribed antibiotic duration was 7 days (interquartile range 7-10). Of 73 encounters with UCx growing mixed flora or a nonuropathogen, only 29 (40%) had antibiotics discontinued. Confirmed UTI was associated with fever and nitrite positivity. Our study revealed high prevalence of inappropriate antibiotics, particularly unnecessary prescribing of third cephalosporin, prescriptions not supported by laboratory data, and prolonged treatment courses. Our results identify factors that can be used to support UTI treatment pathways and ensure antibiotic stewardship.

Knowledge, Attitudes, and Practices of Parents Regarding Antibiotic Use for Acute Upper Respiratory Tract Infections in Children in Basrah, Iraq.

Upper respiratory tract infections (URTIs) are mainly caused by viral infections, but parental attitudes often lead to inappropriate antibiotic prescriptions, thereby increasing antibiotic resistance. This study aimed to evaluate parents' knowledge, attitudes, and practices (KAP) regarding antibiotic use for children with URTIs in Basrah, Iraq. A cross-sectional study was conducted at 14 primary healthcare centers in Basrah from November 2023 to April 2024. A questionnaire was designed and administered to determine parents' KAP regarding antibiotic use for children suffering from URTIs. Four hundred parents completed the questionnaire. The majority (81%) of parents were aware that antibiotic misuse leads to bacterial resistance. Sixty percent of respondents disagreed that viral infection is a leading cause of URTI and that it can be self-limited without antibiotics. A total of 67.6% of the parents were aware of the possibility of having side effects from antibiotic consumption. Moreover, more than half of parents (58.8%) never asked their pediatricians for an antibiotic prescription for their children. Educational interventions are necessary to raise parents' awareness of antibiotics to reduce inappropriate use and its consequences.

Prophylaxis of respiratory syncytial virus infection: current status and prospects for vaccine development

INTRODUCTION. Respiratory syncytial virus (RSV) is one of the most widespread pathogens that typically cause acute upper and lower respiratory tract infections in children and adults. Monoclonal antibody products have long been used for passive immunoprophylaxis in premature infants with bronchopulmonary dysplasia. However, vaccines have recently been licensed for the prophylactic immunisation of older adults with various risk factors for severe RSV infection (primarily, chronic cardiovascular and respiratory diseases and diabetes mellitus).AIM. This study aimed to review the current status of the development of vaccines for active immunisation against RSV infection, including the epidemiological rationale for their development, clinical trial results for licensed vaccines, recommendations for vaccination, and promising pipeline vaccines for RSV prevention.DISCUSSION. Initially hindered by the unique immunopathogenesis of RSV infection and the genetic hypervariability of RSV for a long time, attempts to develop an RSV vaccine succeeded when international researchers managed to identify a conservative neutralising antibody target capable of inducing specific immunity against RSV. This target, the RSV capsid protein stabilised in its prefusion (pre-F) conformation, can mediate viral entry into the cell following a conformational change. Several subunit vaccines based on recombinant pre-F proteins have successfully passed clinical trials and have been approved for the immunisation of older adults. In addition, one of these vaccines has been recommended for use during pregnancy to prevent RSV infection in newborns and infants. Currently, programmes are being implemented to develop novel RSV vaccines based on messenger RNA (mRNA) and non-replicating attenuated influenza vectors. This article examines and summarises the efficacy and safety parameters of two RSV vaccines approved in multiple countries around the world. Both vaccines have satisfactory safety profiles and comparable prophylactic efficacy parameters.CONCLUSIONS. Prelicensure clinical trials of novel RSV vaccines, including those being developed in the Russian Federation, should include prophylactic efficacy assessments in target patient populations. For vaccines approved by leading international regulators, clinical trials required for approval in the Russian Federation will be limited to bridging studies confirming the immunogenicity and safety of the vaccines.

Traditional Chinese Medicine in the treatment of recurrent respiratory tract infections in children: an overview of systematic reviews and Meta-analyses.

To evaluate and summarise the evidence from published Meta-analyses/systematic reviews (MAs/SRs) of Traditional Chinese Medicine (TCM) in the treatment of recurrent respiratory tract infections (RRTIs) and to provide a scientific basis for the clinical treatment of RRTIs with TCM. Studies were retrieved from Chinese and English databases including the China National Knowledge Infrastructure, Wanfang database, China Science and Technology Journal Database, SinoMed, PubMed, Web of Science, the Cochrane Library and EMbase from their establishment date to March 2023. Involved studies were screened, extracted, and evaluated for quality by two researchers independently. The a measurement tool to assess systematic reviews (AMSTAR) 2 scale was used for methodological quality evaluation, as well as the preferred reporting items for systematic reviews and Meta-analyses (PRISMA) 2020 statement for report quality evaluation, the risk of bias in systematic reviews (ROBIS) tool for risk of bias, and the grading of recommendations, assessment, development and evaluation (GRADE) quality assessment tool for evidence quality. Twenty MAs/SRs studies were included, including analyses of 274 original studies involving 38 335 patients with RRTIs. The AMSTAR 2 scale evaluation results showed that 19 studies were of very low quality and one of moderate quality. The ROBIS evaluation results showed that 11 MAs/SRs were at high risk and nine at low risk of bias. The PRISMA 2020 report quality showed the included studies had scores between 23.5 and 35.5, among them one with high quality, 17 with moderate quality and two with low quality. The GRADE system results showed that among 126 outcome indicators, only 17 had moderate quality of evidence, 27 had low quality, 82 had very low quality, and none had high quality. The MAs/SRs methodological quality of using TCM for treatment RRTIs is generally poor, the quality of reports as well as of evidence is generally low, and the risk of bias is high; therefore we should treat these results with caution.

Epidemiological Characteristics of Upper Respiratory Tract Pathogens in Children in Guangdong, China.

Researches on the epidemiology of various respiratory pathogens at multiple testing points in the pediatric population are limited, and these are crucial for the prevention of respiratory tract infections in children. We obtained 1788 upper respiratory tract swabs from children exhibiting symptoms of respiratory infection (notably fever with a body temperature exceeding 38.5°C) across five hospitals in Guangdong between November 2020 and June 2022. We used the multiplex probe amplification (MPA) PCR testing to identify 11 respiratory viruses and subsequently analyzed the prevalence characteristics of these pathogens among febrile children in hospitals. The overall detection rate of the pathogens was 58.1% (1039/1788). Human rhinovirus (HRV) exhibited the highest detection rate at 19.0% (339/1788), succeeded by human parainfluenza virus (HPIV), human adenovirus (HAdV), and respiratory syncytial virus (RSV). The positivity and coinfection rates were higher in children aged 5 years and below compared to those above 5 years. Moreover, a distinct pathogen spectrum was observed across different age groups. Hospitalized patients demonstrated a significantly higher positivity and coinfection rate compared to outpatients. During COVID-2019, RSV appeared a counter-seasonal trend. Respiratory viral infections in children display distinct characteristics concerning age, hospitalization status, and seasonality. Children under the age of 5 and minor patients admitted to hospitals at least be tested for RSV, HRV, HPIV, and HAdV. The epidemiological patterns of RSV in the post-epidemic period require ongoing surveillance.

Epidemiological and clinical characteristics of adenovirus-associated respiratory tract infection in children in Hangzhou, China, 2019-2024.

This study aimed to assess the impact of COVID-19 on the prevalence of adenovirus (AdV) infection in children. This study retrospectively analyzed the changes in the epidemiological and clinical features of AdV-associated respiratory infections in children in Hangzhou, China, between January 2019 and July 2024. A total of 771 316 samples were included in the study, and the positive rate was 6.10% (47 050/771 316). Among them, the positive rate of AdV infection was highest in 2019, reaching 11.29% (26 929/238 333), while the positive rates in the remaining years were between 2% and 9%. In terms of seasonal epidemic characteristics, the summer of 2019 was the peak of AdV incidence, with the positive rate peaking at around 16.95% (7275/45 268), followed by a gradual decline and a low-level epidemic in winter, with a positive rate of 8.79% (8094/92 060). However, during the period 2020-2024, the AdV epidemic season did not show any significant regularity. Gender analysis revealed that the positive rate of male patients was generally greater than that of female patients. In different age groups, the population susceptible to AdV changed before and after the epidemic. In the early and middle stages of the COVID-19 epidemic, the susceptible population was mainly 2-5 years old, whereas in the later stages of the epidemic, the susceptible population was 5-18 years old. In addition, the main clinical symptoms of AdV-positive children from 2019-2024 were respiratory tract symptoms and fever. In summary, the COVID-19 epidemic has had a certain impact on the prevalence of AdV. These findings provide an important basis and reference for the prevention and diagnosis of AdV, especially in the context of increasing age- and gender-specific public health strategies.

Screening for Lower Respiratory Tract Infections in Children with Cystic Fibrosis

Screening for Lower Respiratory Tract Infections in Children with Cystic Fibrosis