Borneo’s ‘Parasite of Parasites’ Could Reshape Antimicrobial Research

Researchers from Universiti Malaysia Sabah have identified a new species of hyperparasitic fungus in the Danum Valley region of Sabah, Borneo. The organism, formally described in the journal Phytotaxa as Pleurocordyceps cornusynnemata, targets Ophiocordyceps, a well-known pathogen that infects ants by manipulating their nervous systems to facilitate spore dispersal.

The discovery was made during field expeditions in the remote tropical forest. According to Jaya Seelan Sathiya Seelan, deputy director of the university’s Institute for Tropical Biology and Conservation (ITBC), the team encountered the fungus almost by chance while examining a dead ant. Unlike Ophiocordyceps, which controls the host insect, Pleurocordyceps cornusynnemata infiltrates and feeds directly on the zombie fungus tissue growing inside the ant.

Seelan noted that while hyperparasites exist in other ecosystems, this is the first identified with the species’ distinctive horn-shaped structure. The finding highlights the complex, often hidden layers of biodiversity within tropical environments, with the ITBC describing the event as evidence of how much remains unknown about forest ecosystems.

During the same expeditions, researchers also documented a new fungal species lethal to spiders, which spreads its spores throughout the arachnid’s body before killing it. These discoveries extend beyond academic interest, with Seelan telling AFP that the newly documented fungi hold immense potential for practical applications.

The university highlighted that these organisms could serve as sources for developing next-generation antimicrobial drugs and highly effective biocontrol agents against agricultural pests. While the practical benefits are prospective, the identification of such a specialized hyperparasite marks a significant step in understanding biological interactions that could inform future health and agricultural strategies.