May 17, 2024
Colloquium Topic: What if Fungi Win?
Humans and fungi share nearly 50 percent of the same DNA. Because we're related, designing drugs to combat the varieties that attack us is a challenge. Meanwhile, in an ever hotter, wetter world, fungi may be finding new ways to thrive, queueing up global outbreak potentials for which no vaccine and woefully few medications exist; some fungi are already beginning to resist treatment. Among other lifeforms, bats, amphibians, and essential crops are also increasingly threatened by these pathogens.
Enter fungal kingdom frontiersman Dr. Arturo Casadevall, an epidemiologist, professor, and inventor. Casadevall shares how the 1990s AIDS epidemic's fungal complications drove his medical mycology work, how COVID-19's fungal incidences underscore the continuing threat to the immunocompromised, and how he and his Johns Hopkins University laboratory team are discovering ways to counter the threats posed by these cunning, hungry combatants.
What If Fungi Win? describes the beneficial roles of fungi along with their mischievous and deadly impacts and illustrates how committed experts like Casadevall are researching ways to save us and our food supplies. In addition to an overview of blights, lichens, molds, mushrooms, rusts, and smuts, readers will learn about:
- how fungi proliferated following the mass dinosaur extinction
- Oregon's ancient 2,384-acre Armillaria ostoyae—Earth's largest organism
- the rye fungus ergot that may have fueled the Salem witch trials
- mushrooms used to create vegan leather and eco-friendly packaging, as well as plastic-consuming fungi
- why it's critical that funding institutions pay attention to fungal risks and aid scientists in their work.
Colloquium Speaker: Arturo Casadevall
Dr. Arturo Casadevall is a microbiologist and immunologist and a Bloomberg Distinguished Professor at the Bloomberg School of Public Health in the School of Medicine at Johns Hopkins. His laboratory studies two fundamental questions: First, how do microbes cause disease? Second, how do hosts, such as humans, protect themselves against microbes? To address these large questions, the laboratory has a multidisciplinary research program spanning several areas of basic immunology and microbiology.
A major focus of the laboratory is the fungus Cryptococcus neoformans, a ubiquitous environmental microbe that is a frequent cause of disease in individuals with impaired immunity. The fungus causes lung infection, including a particularly dangerous fungal meningitis observed primarily in immune-compromised patients such as those with AIDS. Many of the laboratory’s projects seek to understand how hosts defend against C. neoformans and how the Cryptococcus organism’s virulence contributes to disease. For example, melanin production in C. neoformans, is associated with virulence. Melanin is a pigment with an undefined chemical structure and tremendous physical stability. This pigment accumulates in the cell wall of C. neoformans and allows growth and budding to occur. But melanin research also has wide reach: an antibody to fungal melanin made in the Casadevall laboratory is currently in evaluation for the treatment of melanoma, a type of skin cancer.
In recent years the laboratory has also worked with other microorganisms including Bacillus anthracis, a bacterium that causes anthrax and is a major agent of biological warfare because it produces spores that can be easily dispersed. The laboratory is interested in devising antibody-based countermeasures to protect against anthrax.