Study Finds Nearly Half of Traded Wild Mammal Species Carry Human Pathogens

A study published in the journal Nature examined the prevalence of pathogens in wild mammals traded for various purposes. Researchers analyzed data on more than 4,000 wild mammal species, focusing on those involved in trade for food, fur, research, and traditional medicines. The findings revealed that 47% of these traded species carry at least one pathogen known to cause disease in humans.

The study identified 802 pathogens with zoonotic potential among the traded mammals. These pathogens include viruses, bacteria, and parasites that can transmit from animals to humans. The research drew from global databases on wildlife trade and pathogen records to assess the overlap between traded species and disease risks.

the 1,740 wild mammal species documented in trade, 820 species were found to host at least one human-infecting pathogen.

Bats and rodents emerged as particularly significant groups, with high proportions carrying multiple pathogens. The study noted that trade activities increase contact between humans and these animals, potentially facilitating pathogen spillover. The research emphasized that not all traded species pose equal risks, but the overall pattern indicates widespread exposure.

For instance, species like primates and carnivores also showed notable pathogen loads. This analysis builds on prior work linking wildlife trade to outbreaks such as Ebola and SARS.

The study's authors called for enhanced surveillance and regulation of wildlife trade to mitigate zoonotic disease risks.

They pointed to the need for better data on pathogen circulation in traded animals. International bodies like the World Health Organization and Convention on International Trade in Endangered Species may use these findings to inform policies. Affected parties include traders, consumers, and researchers handling these mammals, as well as communities near trade hubs.

Next steps could involve targeted testing of high-risk species and international cooperation to reduce trade volumes of pathogen-carrying animals. The full study provides detailed methodologies and species lists for further reference.