Related Experiment Video
Updated: Jun 25, 2026
Capsular Serotyping of Streptococcus pneumoniae by Latex Agglutination
Published on: September 25, 2014
The alphabet soup of pneumonia: CAP, HAP, HCAP, NHAP, and VAP
1Division of Pulmonary and Critical Care Medicine, Washington University School of Medicine, St. Louis, Missouri 63110, USA.
Abstract:
The classification of pneumonia is increasingly complex as the patient population becomes more diverse. More and more patients are identified with pneumonia attributed to multidrug-resistant (MDR) bacteria, occurring both in the hospital setting and outside of the hospital. This is likely related to the expanding pool of patients at risk for colonization with MDR bacteria. These expanding patient populations include individuals residing in nonhospital health care facilities (e.g., long-term nursing facilities, assisted living environments, rehabilitation centers), patients undergoing outpatient procedures or therapies (hemodialysis, wound care, infusion therapy), patients who have been recently discharged from the hospital setting, and those with significant underlying immunosuppression. Patients exposed to these nonhospital risks who develop pneumonia have traditionally been categorized as having community-acquired pneumonia (CAP). However, the new designation for pneumonia acquired in these environments is healthcare-associated pneumonia (HCAP). Additionally, some authors have categorized patients in nursing homes as developing nursing home-acquired pneumonia (NHAP) because there may be distinct epidemiological associations with this infection. Although HCAP is currently treated with the same protocols as CAP in many hospitals, recent evidence indicates that HCAP differs from CAP with respect to pathogens and prognosis, and in fact, more closely resembles hospital-acquired pneumonia (HAP) and ventilator-associated pneumonia (VAP) requiring broader empirical antimicrobial therapy than CAP.
Insights
Healthcare-associated pneumonia (HCAP) is a growing concern, often caused by multidrug-resistant bacteria. This pneumonia type, distinct from community-acquired pneumonia (CAP), requires different treatment strategies.
Area of Science:
- Infectious Diseases
- Pulmonology
- Epidemiology
Background:
- Pneumonia classification is complicated by a diverse patient population and increasing rates of multidrug-resistant (MDR) bacteria.
- Patients in nonhospital healthcare settings, undergoing outpatient therapies, recently discharged, or immunocompromised are at increased risk.
- Traditionally, pneumonia in these at-risk populations was classified as community-acquired pneumonia (CAP).
Purpose of the Study:
- To introduce and define healthcare-associated pneumonia (HCAP) as a distinct category.
- To differentiate HCAP from CAP and explore its unique epidemiological associations, including nursing home-acquired pneumonia (NHAP).
- To highlight the need for revised treatment protocols for HCAP based on emerging evidence.
Main Methods:
- Review of current literature and clinical classifications of pneumonia.
- Analysis of epidemiological data linking patient populations to specific pneumonia types.
- Comparison of pathogens, prognosis, and treatment requirements for CAP, HCAP, hospital-acquired pneumonia (HAP), and ventilator-associated pneumonia (VAP).
Main Results:
- HCAP encompasses pneumonia acquired in various nonhospital healthcare settings.
- Evidence suggests HCAP pathogens and prognosis differ from CAP, more closely resembling HAP.
- HCAP may necessitate broader empirical antimicrobial therapy compared to CAP.
Conclusions:
- HCAP represents a significant and evolving challenge in pneumonia management.
- Current treatment protocols for CAP may be inadequate for HCAP.
- Further research and revised clinical guidelines are needed to address HCAP effectively, considering its distinct characteristics and increased severity.
More Related Videos
14:49A Quantitative Dot Blot Assay for AAV Titration and Its Use for Functional Assessment of the Adeno-associated Virus Assembly-activating Proteins
Published on: June 12, 2018
08:10Production of High-Titer Infectious Influenza Pseudotyped Particles with Envelope Glycoproteins from Highly Pathogenic H5N1 and Avian H7N9 Viruses
Published on: January 15, 2020
Related Concept Videos
01:29Pneumonia I: Introduction
01:30Pneumonia I: Introduction
Risk Factors
Various factors influence the likelihood of developing pneumonia. Age plays a crucial role, with infants, children under two, and individuals over 65 at increased risk due to their...
01:14Atypical Pneumonia
01:28Pneumonia IV: Management
Bacterial Pneumonia Treatment
For bacterial pneumonia, antibiotics serve as the cornerstone of therapy. Initial treatment often begins with empirical antibiotics, tailored to the anticipated causative organism and adjusted based on culture results. Key antibiotic choices include:
01:25Hepatitis
01:18Viral Meningitis