In this episode of the Infectious Disease Puscast, Dr. Daniel Griffin provides a solo review of notable infectious disease literature from late July 2025. The discussion spans a range of current challenges and advancements, including the significant long-term health burdens and prolonged viral shedding observed in survivors of the Sudan ebolavirus outbreak. It also highlights the alarming prevalence of multidrug-resistant organisms among war-injured Ukrainian refugees, emphasizing the global implications of antimicrobial resistance in conflict zones. Diagnostic innovations are explored with the evaluation of oral washes for tuberculosis detection. The podcast further addresses the progression of Candida auris from colonization to clinical infection, presents an optimized prophylactic regimen for Pneumocystis pneumonia in lung transplant patients, and delves into the neurological impact of Toxoplasma gondii on brain cell communication. The episode concludes with a cautionary review of severe pediatric raccoon roundworm infections and an overview of the emerging tick-borne Alpha-gal syndrome.
Highlights from Infectious Disease Puscast #86
1:16 Sudan Ebolavirus's Lasting Impact: A study on the 2022 Ugandan outbreak reveals that two years after infection, a majority of Sudan ebolavirus survivors (57.5%) still experience significant musculoskeletal, neurological, and ophthalmological symptoms. The study also found that viral RNA can be shed in semen for up to 210 days and in breast milk for up to 199 days post-infection, highlighting potential ongoing transmission risks.
4:17 The Hidden Cost of War: A study of 166 Ukrainian refugees in Finland found alarmingly high rates of multi-drug resistant (MDR) organisms, particularly among those with war injuries (78.6%). The most common were carbapenemase-producing Enterobacterales (CPE) and MRSA, underscoring the severe challenge of antimicrobial resistance in conflict zones.
6:40 A Simpler Way to Diagnose Tuberculosis: Researchers evaluated oral washes and tongue swabs as an alternative to sputum for diagnosing TB with the Xpert MTB/RIF Ultra test. Oral washes demonstrated a high sensitivity of 80%, suggesting a promising, less-invasive diagnostic method for patients who cannot produce sputum.
9:32 The Threat of Candida auris: An analysis from 2016-2023 shows that nearly 7% of patients screened and found to be colonized with C. auris later developed a clinical infection. With a median time of 86 days from colonization to infection, the findings underscore the importance of strict infection control measures to prevent spread.
13:19 Less is More for PJP Prophylaxis: A single-center study over eight years found that a twice-weekly regimen of single-strength TMP-SMX (Bactrim) was completely effective at preventing Pneumocystis jirovecii pneumonia (PJP) in 105 lung transplant recipients. This reduced frequency may lead to better tolerance and fewer discontinuations, improving patient adherence.
16:12 How Toxoplasma Hijacks Brain Cells: New research shows that neurons infected with Toxoplasma gondii alter their extracellular vesicles, which then change the function of astrocytes (a type of brain cell). This leads to inflammation and a loss of the glutamate transporter GLT-1, revealing a key mechanism behind the parasite's neurological effects.
18:08 Raccoon Roundworm Dangers: An MMWR report details two tragic cases of Baylisascariasis (raccoon roundworm infection) in young, unrelated children in Los Angeles County. The infection, caused by ingesting raccoon feces, led to severe encephalopathy. A delay in diagnosis for one child resulted in permanent, severe neurological damage, emphasizing the need for prompt recognition.
20:40 Understanding Alpha-Gal Syndrome: A review article summarizes Alpha-gal syndrome (AGS) for clinicians. This emerging allergy to red meat is triggered by a bite from the Lone Star tick. Because symptoms like hives or gastrointestinal distress are delayed by several hours after meat consumption, diagnosis can be missed for years, necessitating a high index of suspicion.