Researchers at Florida Atlantic University's Harbor Branch Oceanographic Institute identified three previously unknown Helicobacter bacterial genotypes in pygmy sperm whales (Kogia breviceps) through analysis of stranded animal samples.

The study, published in the Journal of Wildlife Diseases, revealed that these bacteria caused significant digestive damage including inflammation, ulcers, scarring, and parasite infestations in four infected whales.While the bacteria were not confirmed as the direct cause of death, their presence raises concerns about potential impacts on marine wildlife health.The discovery highlights the challenges of studying elusive deep-diving whales, as most knowledge comes from stranded specimens.

Two of the bacterial genotypes showed genetic similarities to known species in dolphins and humans, while the third represented a more divergent lineage.The findings underscore the possibility of numerous undiscovered marine bacteria and their potential role in ocean ecosystem health.This research emphasizes the value of long-term stranding response programs in uncovering critical biological insights about marine mammals.