definitions
one of a group of minute infectious agents, with certain exceptions (e.g., poxviruses) not resolved in the light microscope, and characterized by a lack of independent metabolism and by the ability to replicate only within living host cells. Like living organisms, they are able to reproduce with genetic continuity and the possibility of mutation. They […]
Read more →see under encephalitis and virus
Read more →1. any of various tickborne diseases due to infection with protozoa of the genus Babesia, occurring in wild animals, in domestic animals including cattle, horses, sheep, goats, pigs, cats, and dogs, and in humans as a zoonosis. 2. human infection with species of Babesia, particularly B. divergens and B. microti, a classic type of zoonosis […]
Read more →a general term encompassing a number of diseases that are caused by Borrelia burgdorferi and have similar manifestations, including Lyme disease, acrodermatitis chronica atrophicans, Bannwarth’s syndrome, and erythema chronicum migrans.
Read more →a genus of bacteria of the family Bartonellaceae, order Rickettsiales, made up of gram-negative cells in chains found in fixed tissue cells and in or on erythrocytes. The organism occurs in humans, sometimes asymptomatically, and in arthropod vectors. The genus includes organisms formerly classified in the genus Rochalimaea.
Read more →a genus of protozoa of the order Piroplasmida, occurring as single or paired parasites within the erythrocytes of various vertebrates, causing babesiosis and other diseases in domestic and wild animals and humans and transmitted by ticks, in which a sexual multiplicative cycle occurs. Certain species have been reported to cause a malarialike disease in both […]
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