The strain the animals have contains a mutation allowing it to more easily transmit between mammals. It is also a different variation than the ones found in dairy cows and commercial poultry. This one is Eurasian in origin, first seen in 2022. It has been detected in birds that fly along the Pacific Flyway, and is responsible for a mass mortality event in 2023 in northern fur seals on an island in eastern Russia.
Risks of outbreaks with pandemic potential rise with increasing land-use change, biodiversity loss and climate change. The Pandemic Agreement adopted by the World Health Assembly in 2025 marks a historic shift that establishes the One Health approach as a legally binding obligation for pandemic prevention.
Bats carry a lot of very deadly pathogens like Ebola virus, Nipah, Hendra, coronavirus, and also rabies virus. People are finding more and more bat-borne viruses. When such viruses are transmitted to humans, the results are often fatal so there's a lot of interest in trying to prevent spillover in the first place.
In a study published in Science Advances, researchers in China fed Aedes aegypti mosquitoes blood that contained either a vaccine against Nipah virus or the rabies virus. The viruses, contained in the vaccines, replicated inside the insects and reached their salivary glands, allowing them to pass on the vaccine when feeding on bats or when the bats ate the insects.
For the first time, cameras in Africa captured a 'dynamic network' of wildlife interacting with thousands of infected bats believed to be carrying the Marburg virus, which is a rare but extremely dangerous disease that belongs to the same family as Ebola. The new videos revealed at least 14 different types of animals, including leopards, hyenas, monkeys, birds and rats, actively hunting herds of Egyptian fruit bats.
This is exceptionally rapid detection of an outbreak in free-ranging marine mammals, said professor Christine Johnson, director of the Institute for Pandemic Insights at UC Davis' Weill School of Veterinary Medicine. We have most likely identified the very first cases here because of coordinated teams that have been on high alert with active surveillance for this disease for some time.
A statement by the government's region 5 livestock office for Chiang Mai, said the animals had been infected with canine distemper virus, with veterinarians also identifying mycoplasma bacteria as a secondary infection. Earlier however, Somchuan Ratanamungklanon, director general of the department of livestock development within the Thai agricultural ministry, told the Thai outlet Matichon that the tigers had been infected with feline panleukopenia.
Remember that moment at the dog park when you see two golden retrievers, with one bouncing around with bright eyes and a glossy coat, and the other just going through the motions with a dull expression despite being perfectly groomed? Both dogs are clearly loved and cared for, but something deeper separates them: It's the difference between a dog that's genuinely flourishing and one that's simply being maintained.
During a routine exam, veterinarians found Baylisascaris eggs in the dog's system - the first such formal report of raccoon roundworm in a dog in county history, according to a Los Angeles County Department of Public Health news release. In 2024, two South Bay residents were sickened by the parasite, which can infect the brain, spinal cord and eyes and lead to eye disease and swelling of the brain.
One type of flu virus, called A H3N2, historically has caused the most hospitalizations and deaths in older people. So far this season, that's the type most frequently reported. Even more concerning, more than 91% of the H3N2 infections analyzed were a new version known as the subclade K variant that differs from the strain in this year's flu shots.