Peculiar instances of ocular ailments have surfaced in China, the root cause being a virus previously recognized solely as a pathogen affecting aquatic life. The findings of this investigation are detailed in the journal Nature Microbiology.
A subset of the afflicted developed symptoms reminiscent of glaucoma: inflammation, elevated intraocular pressure, and, in some instances, permanent vision impairment.
Experts from the Chinese Academy of Fishery Sciences examined 70 individuals diagnosed with “persistent ocular hypertension.” In every patient, the so-called latent mottling virus of fish mortality—an agent previously found only in fish, shrimp, and crabs—was detected. Researchers theorize that infection most likely occurred through the consumption of raw seafood or close interaction with aquatic animals. Furthermore, there is circumstantial evidence suggesting potential intrafamilial transmission of the virus.
Over half of those affected were involved in raising marine organisms at home. Experiments conducted on mice also demonstrated that the virus induced damage to the cornea and retina, as reported by Nature Microbiology.
This marks the inaugural documented instance where a virus originating from aquatic animals has directly caused illness in humans. The pathogen itself has already been identified across 49 species of aquatic creatures globally—ranging from shrimp to sea cucumbers. Scientists suggest that the infection might be more widespread than currently assumed, especially given the rising temperatures in oceans and water bodies. Nevertheless, Australian virologist Edward Holmes emphasizes that there is currently no evidence supporting widespread human-to-human transmission, meaning the situation does not pose an epidemic threat.
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