Episode 90 of the Infectious Disease Podcast, hosted by Dr. Daniel Griffin and Dr. Sarah Dong, provides a comprehensive review of recent literature across virology, bacteriology, mycology, and parasitology. Key viral topics include the efficacy of crushed Biktarvy for HIV patients with feeding tubes, the launch of a new measles tracker by Johns Hopkins amidst rising cases, the severe risk of influenza-associated encephalopathy in unvaccinated children, and new CDC guidelines strongly recommending the twice-yearly injectable Lenacapavir for HIV PrEP. Bacterial discussions cover a study on using primary oral vancomycin prophylaxis to control a C. diff outbreak in an ICU and a review of Q fever spinal infections, which are often misdiagnosed. Parasitology is heavily featured, with reports establishing Chagas disease as endemic in the southern United States, a proposal to simplify mass ivermectin administration with age-based dosing, a phase 1 trial of a monoclonal antibody for malaria protection, and a highly effective trial using permethrin-treated baby wraps to prevent malaria in Uganda. The episode concludes by examining a study on ambient documentation technology (AI scribes), which was associated with significant reductions in clinician burnout.
Infectious Disease Literature Review: HIV PrEP, Endemic Chagas, and AI Scribes
0:02:59 Crushed HIV Medication Efficacy: A retrospective study found that the HIV medication Biktarvy, when crushed and administered via an enteral tube, was effective at maintaining viral suppression in 89% of patients, providing valuable data for inpatient care.
0:04:10 New Measles Tracker Highlights Vaccine Importance: A JAMA research letter details a new Johns Hopkins University dashboard for tracking U.S. measles cases at the county level. This provides an alternative data source and underscores the severity of measles, which caused millions of cases and tens of thousands of hospitalizations annually before the vaccine.
0:07:02 Pediatric Influenza-Associated Encephalopathy: An MMWR report on the 2024-2025 flu season identified 109 cases of pediatric influenza-associated encephalopathy, a severe neurologic complication. 55% of affected children were previously healthy, and only 16% of those eligible had received a flu vaccine, highlighting the critical need for childhood flu vaccination.
0:10:17 New Injectable HIV PrEP Recommended: The CDC has strongly recommended injectable Lenacapavir, administered just twice a year, as a new option for HIV pre-exposure prophylaxis (PrEP). While highly effective (96-100% efficacy in trials), its U.S. list price is over $28,000 per year, compared to a production cost of under $50.
0:13:52 C. diff Prophylaxis in ICU Outbreak: During a C. diff outbreak in a Brooklyn ICU, targeted primary prophylaxis with oral vancomycin (125 mg daily) in high-risk patients successfully reduced infection rates back to baseline. However, the intervention was associated with a non-significant rise in VRE.
0:17:05 Q Fever Spinal Infections: A literature review highlights that Q fever can cause spinal infections that are often misdiagnosed as tuberculosis (TB), especially in endemic areas. The paper emphasizes considering Q fever in patients with spinal infections who do not respond to TB treatment, particularly with relevant exposures like contact with sheep manure.
0:23:11 Chagas Disease is Now Endemic in the U.S.: An MMWR report concludes that Chagas disease is an endemic disease in the United States. The "kissing bugs" that transmit the parasite T. cruzi are found in 32 states, and locally acquired human infections have already been confirmed in eight southern states, including Texas, California, and Louisiana.
0:28:06 Simplified Ivermectin Dosing for Mass Administration: A meta-analysis of over 700,000 individuals suggests that a fixed, age-based dosing regimen for ivermectin is as effective as traditional height or weight-based dosing. This approach would simplify logistics and improve coverage in mass drug administration programs for neglected tropical diseases.
0:31:17 Rat Lungworm Outbreak from Raw Slugs: An outbreak of eosinophilic meningitis in Brazil was traced to the ingestion of raw slugs during a religious ritual. The report emphasizes the importance of culturally sensitive history-taking, as patients were initially reluctant to disclose the exposure due to stigma.
0:34:04 Monoclonal Antibody for Malaria Protection: A phase 1 clinical trial tested a monoclonal antibody, MAM01, for preventing malaria. The antibody was well-tolerated, and at the highest intravenous dose (40 mg/kg), it provided 100% protection against controlled human malaria infection.
0:38:15 Insecticide-Treated Baby Wraps Prevent Malaria: In a randomized controlled trial in Uganda, infants carried in permethrin-treated baby wraps had a 66% reduction in the incidence of clinical malaria compared to infants in untreated wraps. This simple, culturally integrated intervention shows significant promise for protecting young children.
0:41:23 AI Scribes Associated with Reduced Clinician Burnout: A study published in JAMA found that the use of ambient documentation technology—an AI system that listens to patient visits and drafts clinical notes—was associated with a significant decrease in clinician burnout (from ~50% to ~30%) and an improved sense of well-being related to documentation.