Coccidioidomycosis in an Immunocompetent Host After Brief Exposure History
Bibliographic record
Abstract
Abstract Coccidioidomycosis, commonly known as “Valley fever,” is caused by Coccidioides immitis or C. posadasii. Although most infections are asymptomatic or limited to mild respiratory symptoms, approximately 1% of cases disseminate to involve other organs, such as the skin, bones, and central nervous system (CNS). The risk of dissemination is higher in individuals with weakened immune systems; however, it can also occur in immunocompetent individuals. The patient is a 48-year-old male who presented with generalized weakness and shortness of breath. Symptoms have been ongoing for four weeks since being diagnosed and treated for pneumonia with oral antibiotics, without improvement. Patient continued to have nonproductive cough and shortness of breath with exertion. He was subsequently given another course of antibiotics and steroids which mildly improved symptoms. Prior to admission he started experiencing worsening weakness particularly in the lower extremities. He noted an intermittent fever, weight loss, and chills. History revealed recent travel to Canada. He denied smoking, occupational exposures, any exotic pets, and no history of lung disease or serious infections. A Computed Tomography scan of the chest was significant for scattered bilateral ground-glass and consolidative airspace opacities compatible with multifocal airspace disease, particularly with a tree in-bud pattern. Labs significant for eosinophilia. Autoimmune and infectious workup was performed, specifically for fungal organisms. Coccidioides antibody was positive. Targeted history revealed some time working in the southwest at construction sites prior to developing symptoms. Bronchoscopy with bronchoalveolar lavage and transbronchial biopsy was performed. The patient was started on fluconazole and discharged to follow up closely. Post-discharge, fungal lavage cultures grew Coccidioides posadasii. Coccidioidomycosis generally presents as a self-limited respiratory illness; however, dissemination can occur, particularly in patients with risk factors, including immunosuppression or recent exposure in endemic regions. This case highlights the potential severity of disease in previously healthy individuals following exposure to the fungus. The patient's generalized weakness, exacerbated by dehydration and hyponatremia, coupled with eosinophilia, raised concerns for possible autoimmune or hypersensitivity reactions. Fluconazole remains the first-line treatment for disseminated disease, while amphotericin B may be necessary in severe cases. The patient showed improvement with antifungal therapy, and no CNS involvement was detected. This case emphasizes the importance of considering coccidioidomycosis in patients presenting with pneumonia, particularly following travel to endemic areas. Disseminated coccidioidomycosis can occur even in immunocompetent individuals and may involve multiple systems. Early diagnosis and appropriate antifungal therapy are critical for ensuring a favorable outcome.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.002 | 0.002 |
| Insufficient payload (model declined to judge) | 0.004 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".