The deaths of dozens of imported sloths at a planned tourist attraction in Florida have reignited concerns among scientists and public health experts over the risks posed by the global wildlife trade—not only to animal welfare but also to human health and future pandemic threats.

Necropsy examinations conducted on sloths imported into Florida revealed a disturbing combination of parasites, bacteria and viruses in animals already weakened by transport stress and poor conditions. According to inspection records and veterinary findings, many animals showed signs of severe illness, including pneumonia, gastrointestinal distress and dehydration.

The sloths had been brought into the United States for a proposed attraction known as Sloth World in Orlando. Before opening to the public, however, the facility closed amid growing scrutiny and public criticism following revelations about animal deaths and conditions.

More than 50 sloths reportedly died.

While the incident drew immediate attention for its animal welfare implications, researchers say it also exposes a much larger issue: the hidden public health dangers embedded in the legal international wildlife trade.

Experts note that approximately three-quarters of emerging infectious diseases affecting humans originate in animals. The movement of wild species across borders, often under stressful and crowded conditions, creates opportunities for pathogens to spread, mutate and potentially cross into new hosts.

Public health specialists argue that wildlife trade systems unintentionally create ideal environments for disease emergence. Animals captured from natural ecosystems are frequently transported long distances, mixed with species they would never encounter in the wild and exposed to stress that weakens immune responses—conditions that can increase pathogen shedding and transmission.

Scientists point to historical examples to illustrate these concerns. The 2002 SARS outbreak in China was linked to live animal markets, while the 2003 mpox outbreak in the United States was associated with the exotic pet trade. Many experts also continue to support the view that COVID-19 likely emerged through animal-related transmission pathways, although alternative theories remain under discussion.

Recent scientific findings have strengthened these concerns. A long-term analysis of international wildlife trade records found that species involved in global trade are significantly more likely to share pathogens with humans than species that are not commercially traded. Researchers observed that the longer species remained in trade networks, the greater the overlap of pathogens.

Scientists emphasize that the concern is not simply the existence of pathogens but the conditions created by wildlife commerce that enable diseases to become zoonotic—crossing from animals into people.

The scale of the trade further amplifies the challenge. Tens of millions of wild animals move internationally every year through legal channels for purposes ranging from the pet industry and entertainment to research and fashion. Additional millions are believed to move through illegal networks.

Yet experts argue that regulatory systems have failed to keep pace with the biological risks.

The Florida sloths entered the country legally and passed through customs procedures. However, according to investigations and agency responses, once imported, responsibility for monitoring zoonotic disease risks appeared fragmented across multiple authorities.

Federal and state agencies referenced one another when asked who held primary responsibility for disease oversight of imported wildlife. Public health experts say this lack of coordination leaves significant gaps in surveillance and response.

Researchers warn that many imported wild animals may later move across states or between owners with limited monitoring and minimal disease screening.

Some regulatory interventions have occurred in response to emerging threats. In recent years, authorities introduced restrictions on importing certain species, including salamanders, to prevent the spread of dangerous fungal pathogens. Florida has also announced temporary restrictions on sloth imports following the recent deaths.

However, scientists caution that reactive bans alone cannot address systemic weaknesses.

Veterinary and public health experts advocate a layered approach to risk reduction—combining quarantine protocols, transport standards, species-specific controls, pathogen testing and stronger coordination among agencies. This strategy, often described as the “Swiss cheese model” of risk management, recognizes that no single safeguard is sufficient, but multiple overlapping protections can reduce the chances of catastrophic failure.

The Florida sloth deaths, experts say, should not be viewed as an isolated tragedy. Instead, they offer a warning about how global wildlife trade, when insufficiently regulated, can become both a conservation concern and a public health challenge with consequences extending far beyond the animals involved.