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Chlamydia psittaci in birds is often systemic, and infections can be inapparent, severe, acute, or chronic with intermittent shedding. [2] [3] [4] C. psittaci strains in birds infect mucosal epithelial cells and macrophages of the respiratory tract.
Psittacosis—also known as parrot fever, and ornithosis—is a zoonotic infectious disease in humans caused by a bacterium called Chlamydia psittaci and contracted from infected parrots, such as macaws, cockatiels, and budgerigars, and from pigeons, sparrows, ducks, hens, gulls and many other species of birds.
The 1929–1930 psittacosis pandemic, also known as the psittacosis outbreak of 1929–1930 and the great parrot fever pandemic, [2] was a series of simultaneous outbreaks of psittacosis (parrot fever) which, accelerated by the breeding and transportation of birds in crowded containers for the purpose of trade, was initially seen to have its origin in parrots from South America.
By the 2010s this reclassification "was not wholly accepted or adopted" [8] among microbiologists, which "resulted in a reversion to the single, original genus Chlamydia, which now encompasses all 9 species including Chlamydia psittaci." [8] As of 2013, Chlamydophila was still mentioned in some databases, but controversial. [9]
A US farmworker who caught bird flu after working with dairy cattle in Texas appears to be the first known case of mammal-to-human transmission of the virus, a new study shows.
The birds received 100 to 1,000 times the concentration that wild birds would encounter in nature. "We couldn't infect the pigeons", Swayne said. "So that's good news." [36] [37] Chlamydophila psittaci is endemic among pigeons [10] and causes psittacosis in humans. It is generally transmitted from handling pigeons or their droppings (more ...
Health officials in San Francisco first reported the bird flu case in the child earlier this month before it was confirmed by the CDC. The child experienced symptoms of fever and eye irritation ...
Bird flu infections in humans remain rare. There is no evidence that H5N1 is spreading from person to person. The CDC says the risk to the public remains low, although people who work on farms and ...