Respond to your peer
Community-acquired pneumonia (CAP) is an infectious disease that although common could become deadly when combined with the patients’ comorbidities: COPD, Hypertension and Diabetes. Treatment includes antimicrobial medications and sufficient oxygenation. It can be caused by bacteria, viruses, or fungi and can be prevented through vaccination with pneumococcal, influenza, and COVID-19 vaccines (Rothberg, M.B., 2022). The CAP causing pathogen will be the deciding factor for the pharmacological approach, but allergies to empiric drug therapies such as penicillin further complicate treatment options. Treatment should include: rapid diagnosis, microbiological investigation, prevention and management of complications (eg, respiratory failure, sepsis, and multiorgan failure), empirical antibiotic therapy (Aliberti, S., et al. 2021).
Commonly used pharmacological treatment of CAP include:
Macrolides: Such as azithromycin, clarithromycin, and erythromycin. These medications are considered first-line therapy for mild to moderate CAP (Metlay, J. P., 2019). Macrolides is a broad-spectrum antibiotic and can treat both Gram-positive and some Gram-negative organisms. The mechanism of action of macrolides is the disruption of the bacterial protein synthesis, specifically targeting the ribosomes.
Fluoroquinolones: Include levofloxacin and moxifloxacin and are reserved to treat severe cases of CAP or patients with co-morbidities not allowing for the use of Macrolides. The mechanism of action of this class of medication includes targeting the bacteria’s DNA process itself through the interference of DNA gyrase and topoisomerase IV which is responsible for DNA repair and replication.
Penicillin and their derivatives: Penicillin and their derivatives are prescribed for CAP caused by the Streptococcus pneumoniae. The mechanism of action of this drug includes inhibiting the bacterial wall synthesis which leads to cell death.
Third generation cephalosporins like ceftriaxone as well as Doxycycline are antibiotic options for patients who cannot take macrolides or fluoroquinolones. The mechanism of action of this treatment is like Penicillin in which they target the cell wall but also go a step further and cause osmotic lysis.
The patient in this case study was treated with empiric antibiotics which included ceftriaxone and azithromycin due to the causative agent of the community acquired pneumonia currently being unknown. The patient will require blood and sputum cultures to be able to prescribe a more specific pharmacological treatment. The antibiotic regimen will need to continue for 7-10 days taking care not to exceed the recommended time to avoid the development of antibiotic resistance.
Due to the patient’s current issues with diet an infusion of D5 ½ NS would be necessary for the replenishment of electrolytes. Accu-checks would also be required to establish blood sugar levels. The patient’s COPD condition should be managed through the administration of a short acting beta agonist (Albuterol) for exacerbation as well as their long-acting bronchodilators for sustained bronchodilation.
Patient education should include the emphasize of the importance of completing the full course of antibiotics even if symptoms subside. If being discharged the patient’s need for in home oxygen should be assessed and monitoring of oxygen levels should be reiterated. The use of the spirometer should be demonstrated as a tool for lung expansion.
References:
Aliberti, S., Dela Cruz, C. S., Amati, F., Sotgiu, G., & Restrepo, M. I. (2021). Community-acquired pneumonia. Lancet (London, England), 398(10303), 906–919. https://doi.org/10.1016/S0140-6736(21)00630-9
Liapikou, A., Cilloniz, C., Palomeque, A., & Torres, T. (2019). Emerging antibiotics for community-acquired pneumonia. Expert opinion on emerging drugs, 24(4), 221–231. https://doi.org/10.1080/14728214.2019.1685494
Metlay, J. P., Waterer, G. W., Long, A. C., Anzueto, A., Brozek, J., Crothers, K., Cooley, L. A., Dean, N. C., Fine, M. J., Flanders, S. A., Griffin, M. R., Metersky, M. L., Musher, D. M., Restrepo, M. I., & Whitney, C. G. (2019). Diagnosis and Treatment of Adults with Community-acquired Pneumonia. An Official Clinical Practice Guideline of the American Thoracic Society and Infectious Diseases Society of America. American journal of respiratory and critical care medicine, 200(7), e45–e67. https://doi.org/10.1164/rccm.201908-1581ST
Rothberg M. B. (2022). Community-Acquired Pneumonia. Annals of internal medicine, 175(4), ITC49–ITC64. https://doi.org/10.7326/AITC202204190
Williams, D. J., Creech, C. B., Walter, E. B., Martin, J. M., Gerber, J. S., Newland, J. G., Howard, L., Hofto, M. E., Staat, M. A., Oler, R. E., Tuyishimire, B., Conrad, T. M., Lee, M. S., Ghazaryan, V., Pettigrew, M. M., Fowler, V. G., Jr, Chambers, H. F., Zaoutis, T. E., Evans, S., Huskins, W. C., … The DMID 14-0079 Study Team (2022). Short- vs Standard-Course Outpatient Antibiotic Therapy for Community-Acquired Pneumonia in Children: The SCOUT-CAP Randomized Clinical Trial. JAMA pediatrics, 176(3), 253–261. https://doi.org/10.1001/jamapediatrics.2021.5547