Acute Respiratory Tract Infections Patients Research Articles

Epidemiology of respiratory pathogens in patients with acute respiratory tract infection in Xiamen, China: A retrospective survey from 2020 to 2022

Acute respiratory tract infections (ARTI) are caused by respiratory pathogens and range from asymptomatic infections to severe respiratory diseases. These diseases can be life threatening with high morbidity and mortality worldwide. Under the pandemic of coronavirus disease 2019 (COVID-19), little has been reported about the pathogen etiologies and epidemiology of patients suffering from ARTI of all age in Xiamen. Region-specific surveillance in individuals with ARTI of all ages was performed in Xiamen from January 2020 to October 2022. Here, we observed the epidemiological characteristics of thirteen pathogens within ARTI patients and further revealed the difference of that between upper respiratory tract infections (URTI) and lower respiratory tract infections (LRTI). In total 56.36 % (2358/4184) of the ARTI patients were positive for at least one respiratory pathogen. Rhinovirus (RVs, 29.22 %), influenza A (FluA, 19.59 %), respiratory syncytial virus (RSV, 18.36 %), metapneumovirus (MPV, 13.91 %), and adenovirus (ADV, 10.31 %) were the five leading respiratory pathogens. Respiratory pathogens displayed age- and season-specific patterns, even between URTI and LRTI. Compared with other groups, a higher proportion of FluA (52.17 % and 68.75 %, respectively) infection was found in the adult group and the elder group, while the lower proportion of RVs (14.11 % and 11.11 %) infection was also observed in them. Although ARTI cases circulated throughout the year, RVs, FluB, and BoV peaked in autumn, and FluA circulated more in summer. Besides, the co-infectious rate was 8.7 % with the most common for RVs. Logistic regression analyses revealed the correlations between respiratory pathogens and disease types. These results are essential for replenishing epidemiological characteristics of common respiratory pathogens that caused ARTI in Xiamen during the epidemic of COVID-19, and a better understanding of it might optimize the local prevention and clinical control.

Epidemiological features of Streptococcus pneumoniae in patients with acute respiratory tract infection in Beijing, China during 2009–2020

BackgroundStreptococcus pneumoniae (S. pneumoniae) is one of the common pathogens causing acute respiratory tract infection (ARTI). The study aimed to investigate the prevalence of S. pneumoniae in patients with ARTI in Beijing, and to provide reference evidence for prevention and control of S. pneumoniae. MethodThe patients from the surveillance data of ARTI in Beijing from 2009 to 2020 were recruited in the study. All patients were tested for S. pneumoniae and other viral and bacterial pathogens. Logistic regression model was used to explore the epidemiological features of S. pneumoniae. ResultsTotally, 4.63% (253/5468) of the ARTI patients were positive for S. pneumoniae. The age, case type and antibiotic therapy in one week before sampling affected the positive rate of S. pneumoniae in patients. No significant difference on the positive rate of S. pneumoniae between the mild and severe pneumonia. Patients infected with S. pneumoniae had a higher risk of pneumonia in adults and the elderly, but a lower risk in children. The leading bacterial and viral pathogens in patients positive for S. pneumoniae were Haemophilus influenzae (36.36%) and human rhinovirus (35.59%), respectively. ConclusionThis study showed that the prevalence of S. pneumoniae in the patients with ARTI was at a low level in Beijing from 2009 to 2020, which was higher in elderly patients, outpatients and patients without antibiotic therapy. It is necessary to further explore the serotype of S. pneumoniae and PCVs vaccine coverage, and rationally develop vaccine manufacture and vaccination programs to reduce the burden of pneumococcal diseases.

Prevalence of human infection with respiratory adenovirus in China: A systematic review and meta-analysis.

Human adenovirus (HAdV) is a major pathogen that causes acute respiratory tract infections (ARTI) and is frequently associated with outbreaks. The HAdV prevalence and the predominant types responsible for ARTI outbreaks remains obscure in China. A systematic review was performed to retrieve literature that reported outbreaks or etiological surveillance of HAdV among ARTI patients in China from 2009 to 2020. Patient information was extracted from the literature to explore the epidemiological characteristics and clinical manifestations of the infection of various HAdV types. The study is registered with PROSPERO, CRD42022303015. A total of 950 articles (91 about outbreaks and 859 about etiological surveillance) meeting the selection criteria were included. Predominant HAdV types from etiological surveillance studies differed from those in outbreak events. Among 859 hospital-based etiological surveillance studies, positive detection rates of HAdV-3 (32.73%) and HAdV-7 (27.48%) were significantly higher than other virus types. While nearly half (45.71%) of outbreaks were caused by HAdV-7 with an overall attack rate of 22.32% among the 70 outbreaks for which the HAdVs were typed by the meta-analysis. Military camp and school were main outbreak settings with significantly different seasonal pattern and attack rate, where HAdV-55 and HAdV-7 were identified as the leading type, respectively. Clinical manifestations mainly depended on the HAdV types and patient's age. HAdV-55 infection tends to develop into pneumonia with poorer prognosis, especially in children <5 years old. This study improves the understanding of epidemiological and clinical features of HAdV infections and outbreaks with different virus types, and helps to inform future surveillance and control efforts in different settings.

Mycoplasma pneumoniae triggers pneumonia epidemic in autumn and winter in Beijing: a multicentre, population-based epidemiological study between 2015 and 2020

ABSTRACT The objective of this paper is to explore the characteristics of Mycoplasma pneumoniae (MP) epidemics in Beijing, China. Patients with acute respiratory tract infection (ARTI) were enrolled from 35 sentinel hospitals in Beijing, 2015–2020. Their medical records were reviewed and respiratory specimens were collected for assay for nucleic acids of 24 respiratory pathogens, including MP. The genotypes of MP were analysed using a real-time PCR method. The domain V of 23s rRNA gene was sequenced to identify macrolide-resistant mutations. A total of 41,677 specimens of ARTI patients were included, with an MP positive rate of 6.16%. MP prevalence mainly occurred between August and January, and peaked in October. The increase in the MP detection rate was coincident with the elevation of the reported number of patients with pneumonia in the 35 sentinel hospitals. One or more respiratory pathogens were co-detected in 27.1% of the MP-positive patients. Type 1 MP remained predominant, and the macrolide-resistant rate of MP had exceeded over 90%. A2063G mutation accounted for 99.0% of macrolide-resistant MP infections. MP epidemic in Beijing mainly occurred between August and January with a remarkable high macrolide-resistant rate. MP is one of the important contributors to the pneumonia epidemic in autumn and winter in Beijing.

Telemedicine diagnosis of acute respiratory tract infection patients is not inferior to face-to-face consultation: a randomized trial.

ABSTRACTObjective To analyze telemedicine diagnostic accuracy in patients with respiratory infections during COVID-19 pandemic compared to face-to-face evaluation in the emergency department.Methods Randomized, unicentric study between September 2020 and November 2020 in patients with any respiratory symptom (exclusion criteria: age >65 years, chronic heart or lung diseases, immunosuppressed). Patients were randomized 1:1 for brief telemedicine followed by face-to-face consultation or direct face-to-face evaluation. The primary endpoint was the International Classification of Diseases code. The secondary analysis comprised length of stay, diagnostic test ordering, medical prescription, and proposed destination.Results Ninety-eight patients were enrolled. The mean age was 36.3±9.7 years old, 57.1% were women, and 81.6% had diagnostic test ordered. Mean grouped by International Classification of Diseases code for upper respiratory tract infection, pharyngotonsillitis, and sinusitis showed no difference between study groups or secondary endpoints. The Telemedicine Group was representative of the population usually evaluated in this center. In the Telemedicine Group (n=48), 18.7% patients would be referred for evaluation at the emergency department. The distribution of diagnoses by telemedicine was 67.4% for upper respiratory tract infection, 2.3% for pharyngotonsillitis, and 0% for sinusitis, being statistically similar to the subsequent face-to-face assessment, respectively: 72.1%, 11.6% and 7% (Kappa 0.386 [95%CI: 0.112-0.66]; p=0.536). Telemedicine ordered COVID-19 molecular (RT-PCR) tests in 76.5% versus 79.4% in face-to-face evaluation (Kappa 0.715 [95%CI: 0.413-1]; p>0.999).Conclusion Diagnostic telemedicine consultation of low-risk patients with acute respiratory symptoms is not inferior to face-to-face evaluation at emergency department. Telemedicine is to be reinforced in the health care system as a strategy for the initial assessment of acute patients. ClinicalTrials.gov Identifier: NCT04806477

Sapovirus, Norovirus and Rotavirus Detections in Stool Samples of Hospitalized Finnish Children With and Without Acute Gastroenteritis.

Background:Sapovirus, norovirus and rotavirus are major causes of childhood acute gastroenteritis (AGE) globally. Asymptomatic infections of these viruses have not been extensively studied.Aim:To examine the prevalence and the genetic variations of sapovirus, norovirus and rotavirus in children with and without symptoms of AGE.Methods:We collected 999 stool samples from children under 16 years old from September 2009 to August 2011 at Tampere University Hospital, Finland. In total 442 children (44%) had symptoms of AGE and 557 patients (56%) had acute respiratory tract infection (ARTI) only. Samples were examined for sapovirus, norovirus and rotavirus using reverse transcription-polymerase chain reaction and the positive amplicons were sequenced.Results:Totally 54% and 14% of the patients in AGE and ARTI groups, respectively, tested positive. All viruses were more frequently detected in AGE patients than in ARTI patients (norovirus, 25% vs. 7.2%, respectively; rotavirus, 24% vs. 6.1%; sapovirus, 5.2% vs. 1.4%). In ARTI patients, the cases were seen most frequently during the first two years of life. Norovirus was the most detected pathogen in both groups with genogroup GII covering ≥97% of norovirus strains. Sapovirus was mostly detected in children under 18 months old without predominating genotype. Rotavirus was often detected after recent rotavirus vaccination and 18% and 88% of the strains were rotavirus vaccine-derived in AGE and ARTI groups, respectively.Conclusions:We showed that the most common viruses causing gastroenteritis in children may be found in the stools of an asymptomatic carrier which may function as a potential reservoir for AGE.

Risk of Hospitalization in Under-five Children With Community-Acquired Pneumonia: A Multicentric Prospective Cohort Study

To evaluate factors associated with risk of hospitalization in children with community-acquired pneumonia (CAP). Prospective cohort study. Multi-site hospital based study. A separate acute respiratory tract infection (ARI) treatment unit (ATU) was established. The revised WHO case definition for ARI was used across all the study sites to ensure uniformity in management of ARI patients (2-59 months). Clinical history, examination findings and investigations of enrolled patients were recorded on a predesigned case record form. Children were followed up at 1 week (± 1 day). Risk factors for hospitalization among pneumonia patients. A total of 7026 children with the diagnosis of ARI were enrolled. Pneumonia was diagnosed in 938 (13.4%) patients (median (IQR) age: 15 (8, 25) months; 63.5% boys). Hospitalization was needed in 56.8% of pneumonia patients. On multi-variate analysis, factors associated with risk of hospitalization were: Oxygen saturation on pulse oximetry (SpO2) <92% in room air (OR 7.04; 95% CI 1.6, 30.8, P=0.01), procalcitonin level >0.5 ng/mL (OR: 7.5, 95% CI: 1.0, 57.7, P=0.05), and lower weight for height z-score (OR 0.8; 95% CI: 0.6, 0.9, P=0.02). Present study found SpO2 <92% at room air, serum procalcitonin level >0.5 ng/mL and lower weight for height z-score to be predictors for risk of hospitalization in under-five children presenting with community acquired pneumonia. These factors can be utilized to assess a child with CAP regarding the need of hospitalization.

Etiological and epidemiological features of acute respiratory infections in China

Nationwide prospective surveillance of all-age patients with acute respiratory infections was conducted in China between 2009‒2019. Here we report the etiological and epidemiological features of the 231,107 eligible patients enrolled in this analysis. Children <5 years old and school-age children have the highest viral positivity rate (46.9%) and bacterial positivity rate (30.9%). Influenza virus, respiratory syncytial virus and human rhinovirus are the three leading viral pathogens with proportions of 28.5%, 16.8% and 16.7%, and Streptococcus pneumoniae, Mycoplasma pneumoniae and Klebsiella pneumoniae are the three leading bacterial pathogens (29.9%, 18.6% and 15.8%). Negative interactions between viruses and positive interactions between viral and bacterial pathogens are common. A Join-Point analysis reveals the age-specific positivity rate and how this varied for individual pathogens. These data indicate that differential priorities for diagnosis, prevention and control should be highlighted in terms of acute respiratory tract infection patients’ demography, geographic locations and season of illness in China.

Prevalence, serotype distribution, and antimicrobial susceptibility profile of Streptococcus pneumoniae among patients with acute respiratory tract infection.

We investigated the nasopharyngeal (NP) carriage and antimicrobial susceptibility profile of Streptococcus pneumoniae among adults and children with acute respiratory tract infection (ARTI). NP swabs were collected from ARTI patients in Tabanan, Bali, Indonesia, in 2017. Serotyping of S. pneumoniae and antibiotic susceptibility profile were performed by multiplex sequential PCR and the disk diffusion method, respectively. Out of 200 ARTI patients, S. pneumoniae strains were carried by 22.6% and 2.4% of children (36/159) and adults (1/41), respectively. Serotype 6A/6B was the most common serotype among cultured strains (21%) followed by 19F (18%) and 14 (8%). Most isolates were susceptible to chloramphenicol (87%), followed by clindamycin (74%), erythromycin (72%), sulfamethoxazole-trimethoprim (59%), and tetracycline (44%). This finding provides baseline information on the serotype distribution of S. pneumoniae carriage among ARTI patients in Indonesia.

Are functional gastrointestinal disorders a clinically significant comorbid factor for acute respiratory infection in children?

Rationale: Functional gastrointestinal disorders (FGID) are highly prevalent in children worldwide. Current concept of FGID pathophysiology implies contributions from various mechanisms. Information in the role of acute respiratory infections in the development of FGID in children is lacking.Aim: To determine the prevalence of FGID in children hospitalized to the department of infectious diseases with acute respiratory tract infections (ARTI) and their association with demographic, medical biological factors and clinical manifestations.Materials and methods: We performed observational and cross-sectional study with continuous patient sampling. The study included 180 ARTI patients, whose mothers agreed to fill in the proposed questionnaire of 41 items. The diagnosis of FGID during in-hospital stay was made based on clinical data in accordance with the Rome criteria IV (2016) and by standard collection of the information from the parents. The stool characteristics were assessed with the Bristol scale. The rate of recurrent ARTI was assessed by the resistance index of above 0.5. We considered clinical symptoms of ARTI at the admittance, the rates of bacterial complications and the need in antibacterial treatment.Results: The prevalence of FGID in hospitalized children with ARTI below 4 years of age (n = 134) was 35.1% (95% confidence interval [CI]) 27.0– 43.9); they had higher rates of functional diarrhea (14.9%, 95% CI 9.4–22.1) and constipation (14.2%, 95% CI 8.8–21.3). Among those above 4 years of age (n = 46), FGID were diagnosed in 50% (95% CI 34.9–65.1) of the cases; with most frequent symptoms being abdominal pain (39.1%, 95% CI 25.1–54.6) and irritable bowel syndrome (10.8%). Irrespective of their age, the children with FGID had higher rates of ARTI recurrence (by 34.0%, 95% CI 20.0–48.1; relative risk 1.98, 95% CI 1.47–2.69; odds ratio 4.13, 95% CI 2.18–7.85) and intestinal infections in their past history, compared to those without any gastrointestinal symptoms during the index hospitalization. In children with FGID, ARTI were more frequently complicated by otitis and they had higher requirement in antibiotics. The mothers of the infants and toddlers with FGID had lower educational level (smaller proportion of those with high school education) and were less satisfied with their home and living conditions, whereas their fathers were older and more frequently employed in vehicle operations and less frequently were occupied in communication-related professions.Conclusion: Acute respiratory infections, especially recurring, may plaу a significant role in the development and maintenance of FGID in children. Further studies are necessary, which may result in useful information for the development of tailored strategies to treatment and prevention.

Burden of respiratory syncytial virus infection in community-dwelling older adults in Europe (RESCEU): an international prospective cohort study.

Respiratory syncytial virus (RSV) infection in older adults is recognised as an important health issue. We aimed to assess the community burden of RSV in Europe in older adults aged ≥60 years. This international, prospective, observational cohort study is part of work by the REspiratory Syncytial virus Consortium in EUrope (RESCEU). Participants were recruited through general practitioners' (GPs) offices before two independent RSV seasons. Participants reported weekly about symptoms of acute respiratory tract infection (ARTI) during one RSV season. ARTI patients were tested for RSV during home visits and completed a daily symptom diary. RSV illness included PCR-confirmed ARTI and those showing seroconversion over the season. RSV ARTI was based on PCR alone (ClinicalTrials.gov, NCT03621930). We recruited 1040 participants (527 in season 2017-2018 and 513 in season 2018-2019) with a median age of 75 years (range 60-100 years). Of these, 1023 (99%) lived independently at home at baseline. RSV illness incidence was 22 out of 527 (4.2%) and 37 out of 513 (7.2%) in the respective seasons. RSV illness did not affect frailty or cardiopulmonary status during the course of the study. No patients were hospitalised or died from RSV illness. In the 36 patients with PCR confirmed RSV ARTI, symptom duration averaged 19 days, while a doctor's visit took place in 11 out of 36 cases (31%). RSV ARTI could not be differentiated clinically from all other ARTIs based on symptoms. This European study showed that RSV is prevalent in community-dwelling older adults and rarely causes severe disease. This suggests that watchful waiting, using a continuity of care approach to identify those who do need more intensive care, is often justified when RSV is suspected in family practice.

Respiratory severity score and pediatric respiratory severity score criteria in grading and management of pediatric acute respiratory illness

Background and Purpose: Acute respiratory tract infections (ARI) are the leading cause of death in children in the world with the greatest number of deaths occurring in developing countries like India. Considering the prevalence of ARI the use of an objective measure of severity of respiratory illness would have implications in clinical management as well as clinical research. So we compared respiratory severity scoring system RSS (Respiratory Severity Score) with PRESS (Pediatric Respiratory Severity Score), so that we can find out which of the above scores are better and whether they can be implemented to assess pediatric ARI patients. Method: This prospective observational study was conducted in Pediatrics wards, Shri Vasantrao Naik Government Medical College, Yavatmal, Maharashtra India and data was collected from 290 children below 12 years of age by purposive sampling. All the children presenting with respiratory symptoms were subjected to these scoring system (RSS AND PRESS) at the time of admission and were classified based on the scores obtained in respective scoring system. Data was analysed using frequencies, percentages and contingency tables and comparison was made between the above scoring systems to find which one is better applicable in pediatric ARI patient. Results: Incidence of pediatric patients presenting with only respiratory tract infections who are admitted in ward was 25.15 %, with more incidence being reported in children below 12 months (49.31%), males more affected. For both the ARI scoring systems (RSS and PRESS) as the severity increased so is the number of patients requiring oxygen and duration of hospitalization increased significantly (p<0.05) suggesting positive correlation, with RSS having stronger association. Conclusion: Both the scoring systems predicted that on admission if the score is more than chances of requirement of oxygen is more and also duration of hospitalization is more, with RSS being better predictor.

IDENTIFICATION OF DRUG-RELATED PROBLEMS IN PATIENTS WITH UPPER ACUTE RESPIRATORY TRACT INFECTIONS IN TEBET SUBDISTRICT HEALTH CENTER

Objective: Acute respiratory tract infection (ARTI) is common and has the highest death rate in children, especially in growing countries such asIndonesia. The aim of the research is to identify drug-related problems (DRPs) in pediatric ARTI patients based on the DRP classification by Cipolle,Strand, and Morley, which included categories such as unnecessary drug therapy, need additional therapy, ineffective drug, dosage adjustments suchas too low or too high, and adverse drug reaction which is drug interaction.Methods: The design of the study was cross-sectional and descriptive with a retrospective method. The sample of the study was the overall prescriptionsto upper respiratory tract infection patients in Tebet Subdistrict Health Center from July to December 2018 that fulfilled all of the inclusion criteria,using the total sampling method. Total samples that were analyzed were from 179 sheets of prescription with a total of 498 prescriptions.Results: The results of the research based on each parameter were inaccurate drug selection (9.5%), inaccurate indication (12.8%), mismatched dose(79.9%), and drug interaction (0.6%).Conclusion: DRPs in ARTI pediatric patients resulted in a high-risk condition so that the health facilities need to improve their prescribing pattern andmonitor and manage each therapy as well as do a routine prescription assessment to minimize the incidence of DRPs and achieve a rational drug usage.

Corticosteroid Use for Acute Respiratory Tract Infections in Direct-to-Consumer Telemedicine

BackgroundSystemic corticosteroids are not indicated for acute respiratory tract infections yet are nonetheless prescribed in outpatient care. Acute respiratory tract infections are the most common diagnosis in direct-to-consumer telemedicine. The objective of this study was to characterize use of corticosteroids for acute respiratory tract infections in this setting and to assess the association between corticosteroid receipt and patient satisfaction. MethodsEncounters with acute respiratory tract infection patients 18 years and older on a nationwide direct-to-consumer telemedicine platform were conducted by physicians between July 2016 and July 2018. Mixed-effects logistic regression was used to assess differences in the odds of corticosteroid prescription. A second mixed-effects model assessed differences in patient satisfaction by corticosteroid or antibiotic receipt. Adjusted prescribing rates for individual physicians were estimated. Models included diagnoses, patient age and geographic region, physician specialty and geographic region, and antibiotic prescription. ResultsOf the 85,972 encounters with 465 physicians, 11% resulted in the physician prescribing corticosteroids. The median physician prescribing rate was 4.0% (range: <1%-81%). Corticosteroid receipt was associated with higher satisfaction versus receiving nothing (odds ratio: 2.54; 95% confidence interval: 2.25-2.87). Patients who received both an antibiotic and a corticosteroid reported the highest satisfaction (odd ratio: 3.91; 95% confidence interval: 3.27-4.68). There was no correlation between individual physicians’ corticosteroid and antibiotic prescribing rates. ConclusionsCorticosteroid receipt was associated with patient satisfaction. Most physicians rarely prescribed corticosteroids, yet a small number prescribed them frequently. Identification of high-prescribing physicians for educational interventions could reduce use of corticosteroids for acute respiratory tract infections.

Antibiotic resistance: Evaluation of levofloxacin treatment in acute respiratory tract infections cases at the Tasikmalaya City Health Center, Indonesia.

Acute respiratory tract infections (ARTIs) are an acute inflammation of the upper and lower respiratory tract caused by the infection of microorganisms or bacteria, viruses, without or accompanied by inflammation of the lung parenchyma. The use of antibiotics is one way to treat respiratory diseases. This study aims to determine the level of resistance of levofloxacin antibiotics to clinical isolates from ARTIs patients at the Tasikmalaya Health Center, Indonesia. The stages of the research included rejuvenation of clinical single isolates from ARTIs patients, identification of bacteria, and antibiotic resistance testing using the paper-disc method. The results of resistance tests from 142 single clinical isolates of acute respiratory infections showed that levofloxacin antibiotics had high levels of resistance of 50.0%, 30.95% of resistance with intermediate levels, and 19.04% were still sensitive. Bacterial identification test results showed bacteria that have been resistant to levofloxacin are from the genus Haemophillus, Streptococcus, Corynebacterium, Staphylococcus, and Bordetella. Treatment of ARTIs with the antibiotic levofloxacin shows that there has been a relatively large resistance, where the results of the identification of all bacteria showed the bacteria that cause ARTIs.

The burden of respiratory syncytial virus in adults: a systematic review and meta-analysis.

Respiratory syncytial virus (RSV) is the most common pathogen associated with acute lower respiratory tract infections in young children. RSV is also a major viral pathogen causing severe lung disease in the adult population, particularly among the elderly. We conducted a review of adult RSV studies published from January 1970 to February 2017 to determine the burden of disease among adults worldwide. There were no restrictions on health care setting or definition of RSV infection. A total of 1530 published studies were identified, 95 of which were included in this review. The incidence rates of hospitalised RSV acute respiratory tract infection (ARI) in adults >65 years old ranged from 7.3 to 13.0/105 population in Africa and Asia and from 190 to 254/105 population in the USA. Higher incidence rates (195-1790/105 population) were observed in adults ≥50 years old for outpatient or emergency visits in the USA. Of all ARI patients, RSV accounted for 1-10% in adults and 2-14% in patients with chronic diseases or transplantation. Given the limitations in the existing data, significant efforts should be made to generate evidence on the burden of RSV infections in adults and to estimate the potential impact of future preventive interventions.

A system dynamics model of infection risk, expectations, and perceptions on antibiotic prescribing in the United States.

Inappropriate antibiotic prescribing is still a major concern that can lead to devastating outcomes including antibiotic resistance. This study aimed to simulate the antibiotic prescribing behaviour by providers for acute respiratory tract infections (ARTIs) and to evaluate the impact of patient expectation, provider's perception of patient's expectation to receive a prescription, and patient's risk for bacterial infection, on the decision to prescribe. We developed a unique system dynamics (SD) simulation model based on the significant factors that impact the interaction between provider and patient during visits for ARTIs and the decision to prescribe antibiotics. In order to validate the model for different age groups and regions in the United States, we used the sample of 53000 ARTI patient visits made at outpatient settings between 1993 and 2015, based on the National Ambulatory Medical Care Survey (NAMCS). Simulation results reveal that physician diagnosis for prescribing antibiotics is based on physician's experience from their prior prescribing behaviour, their perception of patient's infection risk, and patient's expectation to receive antibiotics. Also, there are some variations depending on patient's age and residential region. The simulation analysis also depicts the decreasing trend in patient's expectation over the past two decades for most age groups and regions. Given the high number of unnecessary prescriptions for ARTI, we found that policies are needed to influence provider's prescribing behaviour through patient's expectation and provider's perception regarding those expectations. Our simulation framework can further be used by policymakers to design and evaluate interventions that may modify the interaction between health providers and patients to optimize antibiotic prescriptions among ARTI patients for different regions and age groups.

Detection of Respiratory Viruses from ARTI Patients by xTAG RVP Fast v2 Assay and Conventional Methods

Acute respiratory tract infections (ARTIs) are a major cause of morbidity and mortality in paediatric patients. Therefore, early detection of the viral aetiologies of ARTIs is essential for patient management and infection control. In this study, we evaluated the performance of a new multiplex polymerase chain reaction (PCR) assay (xTAG Respiratory Viral Panel [RVP] Fast v2) in the detection of respiratory viruses by comparing it with that of viral culture and direct immunofluorescence (IF) staining. Nasopharyngeal swab and aspirate samples were collected prospectively from 199 patients who presented with ARTIs at the University Malaya Medical Centre (UMMC) in Kuala Lumpur, Malaysia during a 10-month period. The PCR assay was conducted in parallel with conventional culture and direct IF staining methods. The positive rate of the xTAG RVP Fast v2 assay (78.4%) in detecting respiratory viruses was higher than that of the viral isolation (7.5%) and direct IF (23.1%) methods. Using the xTAG RVP Fast v2 assay, human enterovirus/human rhinovirus (HEV/HRV) was the most frequently detected (46.2%). The xTAG RVP Fast v2 assay revealed mixed infection caused by two or three respiratory viruses in 40 specimens, and these were undetected by the viral isolation and direct IF methods. The xTAG RVP Fast v2 assay was superior to conventional methods in the identification of common respiratory viruses, with higher sensitivity and shorter turnaround times for laboratory results.

Vitamin D supplementation in paediatric acute respiratory tract infection– is it really advocated?

Objectives: 1.To estimate the level of serum 25 hydroxyvitamin D [25(OH)D] levels in patients of Acute respiratory tract infections (ARTI) admitted in the pediatric ward of a rural hospital. 2. To study the association between vitamin D deficiency and respiratory tract infections by estimating serum 25 hydroxyvitamin D [25(OH)D] levels in these patients. Materials and Methods: A hospital-based observational study was carried out in the patients admitted for ARTI from pediatric ward over 6 month’s duration. A total of 52 subjects between the age group 2 to 60 months were selected for the study. Results: Average Vitamin D levels were 39.6 ng/dl. On the basis of results of Vitamin D level it has been divided into four categories namely, deficient, insufficient, sufficient, and toxic. The number of children with deficient levels and insufficient levels were 33 (63%), sufficient levels were 11 (21 %), where as those with toxic levels were 8 (15%). Conclusion: Vitamin D levels are found to be lower in 63% cases of ARTI. However 15% children had Vitamin D levels in a toxic range. Therefore Vitamin D should not be arbitrarily administered in a therapeutic dose in all children with ARTI. Vitamin D supplementation is to be given after estimation of Vitamin D levels in all ARTI patients. There is a need of more studies to be done on a larger sample size to reach to a certain conclusion.

Prognostic value of procalcitonin in respiratory tract infections across clinical settings.

IntroductionWhether the inflammatory biomarker procalcitonin provides prognostic information across clinical settings and different acute respiratory tract infections (ARIs) is poorly understood. In the present study, we investigated the prognostic value of admission procalcitonin levels to predict adverse clinical outcome in a large ARI population.MethodsWe analysed data from 14 trials and 4,211 ARI patients to study associations of admission procalcitonin levels and setting specific treatment failure and mortality alone at 30 days. We used multivariable hierarchical logistic regression and conducted sensitivity analyses stratified by clinical settings and ARI diagnoses to assess the results’ consistency.ResultsOverall, 864 patients (20.5%) experienced treatment failure and 252 (6.0%) died. The ability of procalcitonin to differentiate patients with from those without treatment failure was highest in the emergency department setting (treatment failure area under the curve (AUC): 0.64 (95% confidence interval (CI): 0.61, 0.67), adjusted odds ratio (OR): 1.85 (95% CI: 1.61, 2.12), P <0.001; and mortality AUC: 0.67 (95% CI: 0.63, 0.71), adjusted OR: 1.82 (95% CI: 1.45, 2.29), P <0.001). In lower respiratory tract infections, procalcitonin was a good predictor of identifying patients at risk for mortality (AUC: 0.71 (95% CI: 0.68, 0.74), adjusted OR: 2.13 (95% CI: 1.82, 2.49), P <0.001). In primary care and intensive care unit patients, no significant association of initial procalcitonin levels and outcome was found.ConclusionsAdmission procalcitonin levels are associated with setting specific treatment failure and provide the most prognostic information regarding ARI in the emergency department setting.