Chiang Mai, Thailand – A highly contagious virus and bacterial infection have led to the deaths of at least 72 tigers at two private animal parks in northern Thailand in recent weeks, raising concerns about animal welfare and disease control. The outbreak, first detected in early February 2026, has prompted authorities to expedite post-mortem examinations and implement quarantine measures.
The affected facilities, Mae Rim Tiger Kingdom in Chiang Mai and a second location in the Mae Taeng district, reported an unusually high number of tiger deaths between February 8 and February 19. A total of 21 tigers died at Mae Rim, while 51 succumbed to the illness at the Mae Taeng site, according to a report by Protected Area Regional Office 16 (Chiang Mai). Mae Rim Tiger Kingdom has temporarily closed for a 14-day period to prevent further spread of the disease.
Identifying the Threat: Canine Distemper and Mycoplasma
Initial investigations ruled out influenza A virus, but laboratory results confirmed the presence of canine distemper virus (CDV) and Mycoplasma spp. In the deceased tigers. The Department of Livestock Development is leading the investigation, with samples analyzed at the Faculty of Veterinary Medicine at Chiang Mai University. CDV, a virus commonly found in canids, can also affect large wild cats, while Mycoplasma spp. Are bacteria associated with respiratory disease. The co-infection of these pathogens is believed to have caused severe pneumonia and complications, contributing to the high mortality rate.
According to the The Guardian, officials are racing to contain the outbreak. Somchuan Ratanamungklanon, director of the national livestock department, noted that detecting illness in tigers can be challenging, stating, “When tigers fall ill, it is more difficult to detect than in animals like cats or dogs. By the time we realised they were sick, it was already too late.”
Impact and Response
Remaining live tigers have been relocated to a nursing center in Mae Taeng district for quarantine and care. Authorities have stressed that CDV is not a zoonotic disease, meaning it cannot be transmitted from animals to humans, alleviating public health concerns. However, the incident has reignited debate surrounding the ethical implications of keeping tigers in captivity for tourism and entertainment.
Animal rights organizations have criticized the conditions in which these tigers are kept. Peta Asia stated, as reported by the New Zealand Herald, “These tigers died the way they lived – in misery, confinement and fear.” The organization argues that reduced tourism would make such facilities unprofitable, potentially preventing future tragedies.
Disease Progression and Symptoms
The disease affects the respiratory and gastrointestinal systems and can, in some cases, progress to the nervous system. The combination of CDV and Mycoplasma spp. Creates a particularly dangerous scenario, leading to severe complications. The France24 reports that authorities are continuing to monitor the situation closely.
The Department of Livestock Development is continuing its investigation, focusing on understanding the origin of the outbreak and preventing future occurrences. The investigation includes thorough post-mortem examinations and analysis of tiger feed.
As the investigation continues, authorities are focused on containing the spread of the virus and providing care for the surviving tigers. The incident serves as a stark reminder of the vulnerability of captive animal populations to infectious diseases and the importance of robust biosecurity measures.
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.
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