1. CPA as an Immune Dysfunction Syndrome – Not Just Structural Lung Disease

Two papers (Janssen et al., Aegerter et al.) add weight to the concept that chronic pulmonary aspergillosis (CPA) is driven not only by underlying lung architecture but by defects in host immunity, including:

Impaired IFN-γ production
Inflammatory effects of Charcot–Leyden crystals (CLC) in mucus
These findings support future directions in host-directed therapy and targeted immunological profiling.

2. Improved Diagnostics: Molecular, Imaging & Bronchoscopy

Significant focus this week on diagnostic innovation:

PCR and multi-target molecular testing in cancer patients (Rickerts et al.)
Radiolabelled siderophore imaging capable of identifying infected regions early (Dvorakova Bendova et al.)
Bronchoscopic signatures of tracheobronchial aspergillosis (Tapia Barredo et al.)
Together, these highlight a shift toward rapid, non-invasive, high-sensitivity diagnostics for invasive and chronic disease.

3. Global Variation in Antifungal Resistance

The Indian susceptibility study (Nikhil et al.) reinforces the strong geographic variability in Aspergillus susceptibility patterns. This may influence both local empiric practice and global surveillance needs.

4. Increasing Recognition of ABPA Beyond Classic Asthma

ABPA continues to be diagnosed in wider groups, including asthma–COPD overlap (Wang et al.), eosinophilic diseases, and cases overlapping with autoimmune conditions (Chakravarty et al.).
This implies:

A need for broader screening,
Awareness that ABPA can mimic inflammatory or autoimmune disease.

5. High ICU Burden – Viral/Fungal Interactions Persist

Papers on influenza-associated aspergillosis (Cabug et al.) and severe ICU presentations (multiple case reports) reflect continuing evidence that viral infections—especially influenza—significantly increase risk for IA hospitalization and mortality.

6. Uncommon Presentations & Rare Pathogens

Reports of hydropneumothorax, prosthetic joint infection (A. penicillioides), endophthalmitis, and DiGeorge-associated aspergillosis show the wide clinical spectrum and the need for clinical suspicion—especially in immunocompromised hosts.

📚 Detailed Summaries of This Week’s Publications

1. Clinical Case Reports & Presentations

Tolosa-Hunt Syndrome Lookalikes Including Orbital Aspergillosis

Bommala S et al. | Cureus | 1 Dec 2025
DOI: https://doi.org/10.7759/cureus.74532
This case of painful ophthalmoplegia outlines key mimics of Tolosa-Hunt syndrome, including orbital aspergillosis, carotid–cavernous fistula, Burkitt lymphoma metastasis, and Miller-Fisher syndrome.
Key takeaway: Orbital aspergillosis remains an important differential in patients with severe unilateral headache and ocular motor palsies.

**Survival from A. terreus IPA on Sequential VA–VV ECMO**

Ordaz EGM | Research Square (preprint) | 28 Nov 2025
DOI (preprint): https://doi.org/10.21203/rs.3.rs-1127632/v1
Describes a critically ill patient requiring sequential extracorporeal support who survived proven invasive pulmonary aspergillosis (A. terreus).
Key takeaway: ECMO does not eliminate diagnostic challenges; persistent bronchoscopy and culture remain essential.

Recurrent Hydropneumothorax in CPA

Tang C et al. | BMJ Case Reports | 26 Nov 2025
DOI: https://doi.org/10.1136/bcr-2024-268568
An immunocompetent patient developed recurrent hydropneumothorax ultimately linked to chronic cavitary pulmonary aspergillosis.
Key takeaway: CPA may present with pleural complications such as hydropneumothorax, not only cavities or haemoptysis.

Bronchoscopic Appearance of Tracheobronchial Aspergillosis

Tapia Barredo L et al. | Med Intensiva | 27 Nov 2025
DOI: https://doi.org/10.1016/j.medin.2025.10.001
Provides macroscopic descriptions of TBA during bronchoscopy.
Key takeaway: Helps clinicians recognise TBA early, especially in ventilated or immunosuppressed patients.

Prosthetic Knee Joint Infection by Aspergillus penicillioides

Nakano H et al. | BMC Infect Dis | 24 Nov 2025
DOI: https://doi.org/10.1186/s12879-025-1645-8
A very rare cause of prosthetic joint infection, requiring prolonged antifungal therapy.
Key takeaway: Rare species can cause deep tissue infections; species identification and susceptibility testing essential.

2. Epidemiology & Burden

ABPA in Asthma–COPD Overlap (China)

Wang W et al. | Respiratory Medicine | 27 Nov 2025
DOI: https://doi.org/10.1016/j.rmed.2025.108547
Reports rates of ABPA in adults with both asthma and COPD.
Key takeaway: ACO populations may have significantly higher ABPA prevalence than asthma alone, suggesting under-recognition.

Aspergillosis-Related Mortality in the United States

Walsh TJ et al. | Clinical Infectious Diseases | 24 Nov 2025
DOI: https://doi.org/10.1093/cid/ciaf653
Analysis of national death certificates shows invasive aspergillosis frequently listed as a primary cause of death.
Key takeaway: High mortality persists, reinforcing the importance of early detection and aggressive management.

3. Diagnostics & Imaging

Molecular Diagnostics in Cancer Patients with Suspected IA

Rickerts V et al. | J Clin Microbiol | 26 Nov 2025
DOI: https://doi.org/10.1128/jcm.01201-25
Evaluates multi-target PCR and antigen testing in BAL and serum.
Key takeaway: Supports wider adoption of rapid molecular diagnostics in high-risk oncology settings.

Radiolabelled Siderophores for Aspergillosis Imaging

Dvorakova Bendova K et al. | npj Imaging | 26 Nov 2025
DOI: https://doi.org/10.1038/s44304-025-00163-y
Rat studies show radiolabelled siderophores accumulate specifically in infected lung tissue.
Key takeaway: Potential groundbreaking tool for early non-invasive localisation of IA lesions.

4. Immunology & Pathogenesis

Defective IFN-γ Responses in CPA

Janssen NAF et al. | J Infect Dis | 29 Nov 2025
DOI: https://doi.org/10.1093/infdis/jiaf596
CPA patients demonstrate impaired interferon-gamma production.
Key takeaway: Suggests a consistent, measurable immune defect—opening doors for immunomodulatory therapies.

Charcot–Leyden Crystals in ABPA (Preprint)

Aegerter H et al. | medRxiv | 27 Nov 2025
DOI: https://doi.org/10.1101/2025.11.27.1126628
Shows that CLCs are present in ABPA sputum and directly promote airway inflammation.
Key takeaway: CLCs are not passive by-products—they drive pathology, especially in mucus-plugging conditions.

IL-18Rα Expression and Viral–Fungal Interactions

Cabug AF et al. | Nat Commun | 24 Nov 2025
DOI: https://doi.org/10.1038/s41467-025-50342-1
Demonstrates how IL-18Rα high-expressing T cells influence severe viral disease and contribute to influenza-associated pulmonary aspergillosis.
Key takeaway: Connects viral immunopathology with susceptibility to IAPA.

5. Treatment & Resistance

Antifungal Susceptibility in Eastern India

Nikhil A et al. | MicrobiologyOpen | 1 Dec 2025
DOI: https://doi.org/10.1002/mbo3.70136
Includes 431 CPA isolates, plus ABPA and other pulmonary forms.
Key takeaway: Confirms significant regional variation in azole susceptibility—important for stewardship.

Off-label Use of Novel Antimicrobials

Retamar-Gentil P et al. | JAC-AMR | 24 Nov 2025
DOI: https://doi.org/10.1093/jacamr/dlaf184
Provides expert consensus on off-label antifungal use, including isavuconazole in refractory cases.
Key takeaway: Practical guidance for difficult-to-treat IA and mucormycosis.

IMI in Children – Progress & Barriers

Yeoh DK et al. | Clin Microbiol Infect | 27 Nov 2025
DOI: https://doi.org/10.1016/j.cmi.2025.11.015
Comprehensive review of invasive mould infections in paediatrics.
Key takeaway: Diagnostics remain limited; clinical suspicion remains essential.

6. Other Notable Reports

HES Mimicking ABPA/EGPA

Chakravarty K et al. | Oxf Med Case Rep | 26 Nov 2025
DOI: https://doi.org/10.1093/omcr/omaf238
Key takeaway: Eosinophilic disorders can closely mimic ABPA, requiring careful differential diagnosis.

Traumatic Fungal Endophthalmitis

Farnan R et al. | BMC Ophthalmol | 25 Nov 2025
DOI: https://doi.org/10.1186/s12886-025-0661-5
Key takeaway: Aspergillus and Fusarium remain major causes of post-traumatic fungal endophthalmitis.

22q11.2 Deletion Syndrome & Disseminated Aspergillosis

Liebling E et al. | Orphanet J Rare Dis | 24 Nov 2025
DOI: https://doi.org/10.1186/s13023-025-04041-x
Key takeaway: Severe immunodeficiency predisposes to disseminated fungal infection; vigilance required.

⭐ Key Themes This Week (weekly updates Early December 2025: week 49)