Chiang Mai, Thailand – A devastating outbreak of canine distemper virus (CDV) and a bacterial infection has led to the deaths of at least 72 tigers at two wildlife parks in the northern province of Chiang Mai, Thailand. The outbreak, which began in early February 2026, has prompted an investigation by the Department of Livestock Development and raised concerns about the welfare of captive big cats.
The majority of the fatalities occurred at Tiger Kingdom Mae Taeng and Tiger Kingdom Mae Rim, both privately operated parks that allow visitors close interaction with tigers. Between February 8 and February 19, a total of 51 tigers died at Mae Taeng and 21 at Mae Rim, according to a report by the Protected Area Regional Office 16 (Chiang Mai). The Mae Rim site has temporarily closed for 14 days as authorities work to contain the spread of the disease.
Identifying the Threat: Canine Distemper and Mycoplasma
Initial laboratory tests ruled out influenza A, but subsequent analysis revealed the presence of both canine distemper virus (CDV) and Mycoplasma spp., a bacteria associated with respiratory disease. According to the Department of Livestock Development, the co-infection likely contributed to severe pneumonia and complications, ultimately leading to the high number of deaths. CDV, although commonly found in canids like dogs, can too affect large wild cats, impacting their respiratory, gastrointestinal, and sometimes nervous systems.
“When tigers fall ill, it is more difficult to detect than in animals like cats or dogs,” explained Somchuan Ratanamungklanon, director-general of Thailand’s department of livestock development, to local media. “By the time we realised they were sick, it was already too late.”
Disease Control Measures and Quarantine
Following the outbreak, a veterinary disease investigation team from the Chiang Mai Provincial Livestock Office inspected the Mae Rim Tiger Kingdom, collecting samples from tiger carcasses and feed for detailed analysis at the Faculty of Veterinary Medicine at Chiang Mai University. The remaining live tigers have been relocated to a nursing center in Mae Taeng district for quarantine and care. Authorities have ordered strict disease control measures, including thorough cleaning and disinfection of animal enclosures, isolation of sick animals, and preparation of vaccinations for the remaining tigers to mitigate further spread.
Officials have also emphasized that CDV is not a zoonotic disease, meaning it cannot be transmitted from animals to humans, alleviating public health concerns. The Nation Thailand reports that disinfectant has been sprayed across the affected sites, and ongoing monitoring of the remaining tigers is underway.
Captivity and Vulnerability
Investigators are also examining contributing factors to the outbreak, including the potential for inbreeding within the captive tiger populations, which can weaken their immune systems and increase susceptibility to infection. The natural behavior of tigers can also make early detection of illness challenging, as symptoms may not become apparent until the disease has progressed significantly.
Animal welfare organizations have used the tragedy to highlight concerns about the ethics of keeping tigers in captivity for entertainment. PETA Asia stated, “These tigers died the way they lived – in misery, confinement and fear.” The organization argues that reducing tourism to these facilities would ultimately decrease their profitability and potentially prevent future tragedies. The Independent reported on PETA Asia’s statement.
Looking Ahead
The Thai authorities are urging the public to report any unusual animal illnesses or deaths to local livestock authorities immediately to facilitate rapid response and control measures. The ongoing investigation will focus on understanding the origin of the outbreak and refining protocols to prevent similar incidents in the future. The long-term impact on the tiger populations at these parks, and the broader implications for captive tiger welfare in Thailand, remain to be seen.
This is a developing story, and we will continue to provide updates as more information becomes available. Please share your thoughts and concerns in the comments below.
Disclaimer: This article provides informational content about a public health and animal welfare issue. It is not intended to be a substitute for professional veterinary or medical advice.
