Bonus Material-03_Viral_Fungi_NocActin_Pulm_infx_2025

Pdf Summary

This document is a comprehensive lecture by Dr. Marcos I. Restrepo on pulmonary infections caused by major viral, fungal, and less common bacterial pathogens. It covers pathogenesis, clinical features, diagnosis, treatment, and prevention strategies relevant to each category.

<strong>Viral Pulmonary Infections:</strong>  
Focuses on influenza viruses (A, B, C), their transmission, complications (encephalitis, myositis, and bacterial superinfection), diagnostic methods (rapid antigen tests and RT-PCR), and treatments including neuraminidase inhibitors. COVID-19 therapies per NIH guidelines and prevention (vaccination) are highlighted. Respiratory syncytial virus (RSV) infection risks and vaccines (e.g., RSVPreF for pregnant women and older adults) are discussed. Herpesviridae family members (CMV, HSV, VZV) cause pneumonia mainly in immunocompromised hosts, diagnosed via PCR and treated with antivirals like ganciclovir or acyclovir.

<strong>Fungal Pulmonary Infections:</strong>  
Covers a range of fungal diseases including invasive aspergillosis, mucormycosis, aspergilloma, chronic cavitary pulmonary aspergillosis (CCPA), allergic bronchopulmonary aspergillosis (ABPA), candidiasis, blastomycosis, coccidioidomycosis, histoplasmosis, pneumocystis jirovecii pneumonia (PCP), and cryptococcosis. The document details clinical presentations, radiologic signs (e.g., halo sign in aspergillosis), diagnostics (culture, antigen assays), and treatments (voriconazole for aspergillosis, amphotericin B for mucormycosis, itraconazole for blastomycosis). It emphasizes prophylaxis, risk factors, and challenges in management, especially in immunocompromised patients.

<strong>Less Common Bacterial Pulmonary Infections:</strong>  
Focuses on filamentous bacteria such as Nocardia and Actinomyces species. Nocardia is weakly acid-fast, causes pulmonary and disseminated infections, mostly in immunosuppressed individuals, treated primarily with TMP-SMX and combination regimens. Actinomyces, anaerobic gram-positive bacilli found in the mouth, cause indolent pulmonary infections often mistaken for malignancy, diagnosed by sulfur granules in tissue, and require prolonged penicillin therapy.

The lecture summarizes key pathogens causing pulmonary infections, their diagnosis, therapeutic options, and preventive measures, providing a valuable resource for clinicians managing complex respiratory infections.

Meta Tag

Concept Pulmonary Infection

Concept Influenza

Concept Viral Pathogens

Concept Fungal Pathogen

Concept Respiratory Syncytial Virus

Keywords

pulmonary infections

viral pneumonia

influenza

COVID-19

respiratory syncytial virus

herpesviridae

fungal infections

aspergillosis

mucormycosis

nocardia actinomyces