Community Acquired Pneumonia

This trial aims to determine whether treatment with inhaled levofloxacin (an antibiotic) is equal to systemic antibiotic treatment (usual care) for patients admitted to a hospital with community-acquired pneumonia in regards to treatment-effect and safety parameters. Additionally, this study will assess if treatment with inhaled antibiotics leads to fewer antibiotic side-effects and a more preserved gastro-intestinal microbial environment. The main question this study aims to answer is: Does inhaled levofloxacin 240mg twice daily result in comparable days alive and out of hospital at 14 days compared to standard-of-care (usual care) antibiotic treatment for community-acquired pneumonia in admitted patients? Secondary questions this study aims to answer are: 1. Does treatment with inhaled levofloxacin reduce proportion of patients with antibiotic side-effects? 2. Does treatment with inhaled levofloxacin lead to preserved diversity in the gut microbiome? 3. Is treatment with inhaled levofloxacin comparable with usual care in regards to patient reported outcomes? The above list is not the complete list of questions this study aims to answer, but serves as highlights.

This is an international, open-label, stratified randomized controlled trial with Bayesian adaptive stopping rules to compare the effects of therapeutic-dose heparin vs. usual care pharmacological thromboprophylaxis on outcomes in patients admitted to hospital with community acquired pneumonia (CAP).

The purpose of this study is to compare effectiveness and safety of Azithromycin versus Doxycycline in adult patients hospitalized with community acquired pneumonia (CAP) treated with Beta-lactams.

This randomized controlled trial aims to compare the efficacy and safety of high-velocity nasal insufflation (HVNI) versus standard noninvasive ventilation (NIV) in adult patients experiencing acute exacerbations of community-acquired pneumonia (CAP) accompanied by hypoxemic respiratory failure. The primary focus is on assessing treatment failure within 48 hours, defined as the need for intubation or death. Secondary outcomes include evaluations of gas exchange parameters, patient comfort levels, duration of ICU stay, and 28-day mortality rates.

The main objective of the trial is to assess the efficacy and safety of trimodulin as adjunctive treatment to standard of care (SoC) compared to placebo plus SoC in hospitalized subjects with sCAP on invasive mechanical ventilation (IMV). Other objectives are to determine detailed pharmacokinetic (PK) properties of trimodulin in a PK substudy and to determine its pharmacodynamic (PD) properties.

This study will evaluate the relative vaccine effectiveness of quadrivalent adjuvanted inactivated influenza vaccine (aIIV4) versus quadrivalent high-dose inactivated influenza vaccine (HD-IIV4) in preventing polymerase chain reaction (PCR)-confirmed influenza and influenza-related outcomes in adults ≥65 years of age during the 2023/24, 2024/25, and 2026/27 influenza seasons. The study is an observational study conducted at Kaiser Permanente Northern California (KPNC), an integrated health care system in the United States.

Almost 90 out of 100 people carry herpes simplex viruses (HSV). Once a person has been infected with the herpes viruses, he or she can't get rid of them for the rest of her/his life. For the most part, the viruses are in a dormant state. Only when the immune system is weakened, for example in the case of a serious illness or stress, are the viruses reactivated. They then mainly cause cold sores, which are harmless for healthy people and usually heal without therapy. However, especially in people with a weakened immune system, HSV can also cause serious infections, such as meningitis. In almost every second mechanically ventilated patient in intensive care who has pneumonia, HSV can be detected in the respiratory tract. This is caused by reactivation of the viruses as a result of the severe underlying disease and stress during intensive care therapy. Whether treatment of the herpes viruses (e.g. with acyclovir) is necessary in this situation and helps the patients to cure has not been clarified, especially as acyclovir can also cause side effects such as a deterioration in kidney function. Currently, the physicians decide to treat the herpes viruses in about half of the patients. Several studies have shown that patients for whom the physician decided to treat the viruses survived more often. However, all of these studies looked at the course of the disease only retrospectively and thus are subject to many biases (including physician selection of who receives treatment, missing data). A definitive conclusion as to whether herpesvirus therapy can be recommended cannot be drawn without doubt from these studies. Therefore, the investigators would like to investigate in a randomized controlled trial, i.e. patients are randomly assigned to the experimental (therapy of herpesviruses) or control group (no therapy of herpesviruses), the effect of therapy with acyclovir on survival in ventilated intensive care patients with lower respiratory tract infection (pneumonia) in whom a large amount of HSV was found in the respiratory tract. The goal of the study is to provide clarity on whether therapy will help patients recover.

This international retrospective Franco-Swiss study focuses on community-acquired pneumonia (CAP) caused by Chlamydia pneumoniae. The working hypothesis is that the prevalence of C. pneumoniae pneumonia is overestimated by the medical community. The primary objective is to determine the true prevalence of C. pneumoniae infections among patients with pneumonia who underwent simplex or multiplex PCR testing. Secondary objectives include; 1. Outpatient management 2. Hospitalization in a medical ward 3. Admission to the intensive care unit 4. In-hospital mortality 5. Radiological presentation of patients with community-acquired pneumonia (CAP) caused by Chlamydia pneumoniae 6. Prevalence of viral or bacterial co-infections associated with C. pneumoniae CAP

Pneumonia is the most common infection in children and leading to most common cause of mortality and morbidity in in children globally. Bacterial cause is mostly streptococcus pneumonia in children of 3 months to 5 years of age. Traditionally 7-10 antibiotic is used for uncomplicated community acquired pneumonia. World health organization (WHO) recommends 5 days of antibiotic for non-severe pneumonia with oral amoxicillin while National institute for health and care excellence (NICE) guidelines 2025 recommends 3-days course of amoxicillin in uncomplicated community acquired pneumonia.1,2 Most studies show Short course antibiotic is as effective as long course of antibiotic with fewer side effect. The Khyber Pakhtunkhwa province faces particular challenges due to limited healthcare access, malnutrition, and suboptimal vaccination coverage which leads to major burden of pneumonia in less than 5 years' children.7 There is need of local data about effectiveness of short course antibiotic in uncomplicated community acquired pneumonia. 3-day oral amoxicillin has better compliance and less side effect of medicine. Short course of oral amoxicillin is cost effective as pneumonia is more common in low socioeconomic population and 3-day course antibiotic is more economical and has better compliance. Long course of antibiotic leads to antibiotic resistance and adverse effects like diarrhea and other gastrointestinal symptoms.

The main objective of this study is to investigate prevalence and risk factors for community-acquired pneumonia (CAP) and its interaction with comorbidities in an unselected group of adult patients receiving outpatient and inpatient care. In addition, information on HIV as a risk factor for CAP and on CAP in immunocompromised patients is collected.

Community acquired pneumonia, in particular when requiring oxygen therapy because of acute hypoxemic respiratory failure and meeting acute respiratory distress syndrome (ARDS) criteria frequently leads to tracheal intubation and poor outcome. Among invasively mechanically ventilated patients with ARDS and presenting a PaO2/FiO2 ratio (arterial partial pressure of oxygen to inspired fraction of oxygen) of less than 150 mmHg, the prone position significantly reduces mortality and represents standard care (Guérin 2013). Among non-intubated COVID-19 patients, a subtype of viral community acquired pneumonia, a recent study showed that awake prone positioning reduces the composite outcome of intubation or death among patients requiring nasal high flow therapy. Furthermore, it favored weaning of nasal high flow therapy. Prone position in patients with non-COVID ARDS treated with high nasal flow was evaluated in 20 patients with predominantly viral pneumonia (Ding 2020) and was associated with improved oxygenation. Coordinating investigator hypothesize that prone positioning of patients suffering non-COVID community acquired pneumonia and undergoing nasal high flow therapy can significantly improve outcome by reducing the need for intubation and associated therapies such as sedation and muscle relaxation.

Reduce inappropriate antibiotic use is a priority of public health agencies. Community-acquired pneumonia (CAP) is one of the most important indications for antibiotic prescriptions. In the majority of the studies of CAP, there is a large proportion of cases with no pathogen identified. Thus, the choice of the empirical antibiotic depends on the most likely pathogen, individual risk factors, comorbidities, and allergies. Patients aged 65 years or older are often treated with amoxicillin/clavulanate or with another broad-spectrum antibiotic (third-generation cephalosporins, antipneumococcal fluoroquinolone). However, broad-spectrum antibiotic prescription in CAP is debated and concerns exist about side-effects and selective pressure for resistance. Due to lack of head-to-head antibiotic comparisons, a recent Cochrane review concluded that current evidence from Randomized Clinical Trials (RCTs) is insufficient to make evidence-based recommendations for the choice for antibiotic to be used, highlighting an important evidence gap.

Pneumonia is one of the leading causes of infection-related mortality in the older population. Traditional severity scores used in emergency departments, such as the Pneumonia Severity Index (PSI) and CURB-65, primarily focus on acute physiological derangements and may not adequately capture biological reserve and frailty in older adults. Frailty is a geriatric syndrome reflecting increased vulnerability to stressors and reduced recovery capacity. This prospective observational cohort study aims to evaluate the predictive value of the Clinical Frailty Scale (CFS) for in-hospital mortality, 30-day mortality, and morbidity in patients aged 65 years and older presenting to the emergency department with pneumonia. Additionally, the study will assess whether incorporating frailty assessment into existing pneumonia severity scores improves prognostic accuracy.

The goal of this clinical trial is to determine if a "watch and wait" antibiotic strategy, called Safety Net Antibiotic Prescribing (SNAP), can safely reduce unnecessary antibiotic use while ensuring that children diagnosed with community-acquired pneumonia get better from their illness. The main aims of this study are: * To compare the effectiveness of SNAP versus immediate antibiotic prescribing in children with mild community-acquired pneumonia (CAP) * To identify which patient groups benefit most from the SNAP strategy * To identify factors that shape implementation of each prescribing strategy. Researchers will compare the SNAP strategy (where parents or guardians are instructed to give antibiotics only if their child is not improving after 72 hours, or sooner if they are worsening) to the immediate antibiotic prescribing strategy (where parents or guardians are instructed to give the antibiotics right after their healthcare visit) to see if one strategy is more effective than the other. Participants will be randomly assigned to either the immediate antibiotic group or the SNAP group at enrollment. Participation lasts 14 days with follow-up surveys at 4, 7, and 14 days after enrollment.

This is a prospective, multicenter, interventional cohort study aimed at constructing a high-quality, dynamic multimodal database for patients with acute respiratory failure caused by community-acquired pneumonia (CAP-ARF). The study focuses on bacterial CAP-ARF patients receiving standardized glucocorticoid therapy to investigate the heterogeneity of treatment responses under different etiologies and immune statuses. The goal is to provide a data foundation for precise immune stratification and identification of glucocorticoid-sensitive populations.

The aim of this work is to assess the benefit of coenzyme Q10 supplementation, in addition to standard antibiotic and other supportive therapy, in the management of hospitalized children with community acquired pneumonia

Complementary and adjunctive therapies are increasingly being explored to enhance asthma control and reduce airway inflammation. Nigella sativa (black seed) is a medicinal plant used traditionally in multiple regions and has demonstrated anti-inflammatory, immunomodulatory, and bronchodilator effects. Its potential as an adjuvant therapy in asthma has attracted attention in both preclinical and clinical research

The primary objective of the REACT randomized clinical trial (RCT) is to optimize the clinical benefit from adjunctive clarithromycin treatment shown in the ACCESS trial and to provide evidence for the clinical benefit of early start of adjunctive oral clarithromycin guided by suPAR to prevent the progression into sepsis in patients with community-acquired pneumonia (CAP) at risk. This can be achieved by endpoints incorporating clinical benefit with the effect of treatment on the improvement of the immune dysregulation of CAP. The secondary objectives of REACT are to investigate the impact of early adjunctive treatment with clarithromycin on the resolution of CAP at the test-of-cure (TOC) visit.

This prospective cohort study aims to characterize the natural progression and outcomes of acute respiratory infections among patients presenting to fever clinics. At enrollment, patients' clinical symptoms, laboratory findings, and chest imaging data will be collected. Longitudinal follow-up will be conducted to evaluate disease progression, complications, and long-term outcomes. As an observational study, no interventions are involved; all patients receive routine clinical management as directed by their attending physicians. This real-world study design enables the assessment of the natural course of acute respiratory infections and the identification of factors associated with clinical outcomes.

This study aims to identify the clinical factors that predict the severity of community-acquired pneumonia (CAP) in pediatric patients. Children admitted to Assiut University Children's Hospital with a diagnosis of CAP will be evaluated through clinical examination, vital signs, laboratory investigations, and radiological findings. The study focuses on determining which clinical features are associated with more severe disease, higher need for oxygen therapy, intensive care admission, or complications. Understanding these predictors may help clinicians recognize severe cases earlier and improve patient management and outcomes.

Community-acquired infections such as community-acquired pneumonia (CAP) and urinary tract infection (UTI) remain leading causes of hospitalization and death due to infections in older persons in Europe. Hospitalization often results in further disabilities and frailty for older and frail individuals, from which some may never recover. Physical activity is well-established as a cornerstone in the primary prevention and treatment of several noncommunicable diseases. However, there is currently no established rehabilitation model following a pneumonia or other infection, nor is there any evidence to support the impact of rehabilitation on the mental and physical health of older and frail individuals following a pneumonia hospitalization or other infection. The aim of the feasibility study is to evaluate a patient-centered and individualized exercise intervention that is kick-started during hospitalization and continued for 3 months after discharge with video-supervised home-based exercise training to patients hospitalized with CAP or UTI compared to standard care with regard to safety, clinical outcomes, patients' perception, functional ability, organizational aspects, and economic aspects.

The aim of this randomised controlled trial is to identify the optimal treatment duration with phenoxymethylpenicillin for community-acquired pneumonia diagnosed in general practice. Eligible participants are adults (≥18 years) presenting in general practice with symptoms of an acute LRTI (i.e., acute illness (≤ 21 days) usually with cough and minimum one other symptom such as dyspnea, sputum production, wheezing, chest discomfort or fever) in whom the GP finds it relevant to treat with antibiotics. Consenting patients who meet all the eligibility criteria will be randomised (1:1:1:1:1) to either three, four, five, six or seven days of treatment with phenoxymethylpenicillin 1.2 MIE four times daily.

This study adopted a prospective, single-center, open-label design, aiming to evaluate the efficacy of the RTI clinical outcome prediction model in predicting clinical outcomes in subjects with acute respiratory tract infections. In this study, the subjects were divided into the community-acquired pneumonia group and the sepsis group, including one baseline visit, one visit on the 7th day, and one visit on the 28th day. During the research process, blood samples will be collected at the corresponding visiting points for the validation of the predictive model.

This is a phase 2 study to evaluate the efficacy and safety of SR1375 in hospitalized adult patients with CAP. Patients will receive SR1375 or placebo for 8 weeks. The study duration for each patient is up to 10 weeks.

The aim of this study will be to evaluate whether a twice-daily antibiotic regimen is non-inferior to a thrice-daily regimen for the treatment of non-severe community acquired pneumonia in children presenting at a paediatric Emergency Department (ED).