an·​a·​plas·​mo·​sis | \ ˌa-nə-ˌplaz-ˈmō-səs How to pronounce anaplasmosis (audio) \
plural anaplasmoses\ ˌa-​nə-​ˌplaz-​ˈmō-​ˌsēz How to pronounce anaplasmosis (audio) \

Definition of anaplasmosis

: a tick-borne disease of cattle and sheep caused by a bacterium (Anaplasma marginale) and characterized especially by anemia and by jaundice

Examples of anaplasmosis in a Sentence

Recent Examples on the Web Cases of Lyme disease, Powassan virus; spotted fever rickettsiosis, including Rocky Mountain spotted fever, anaplasmosis, ehrlichiosis, babesiosis and tularemia all increased last year. Ashley Welch, CBS News, "Diseases spread by ticks hit record level in U.S.," 14 Nov. 2018 And in Michigan, health officials are warning against anaplasmosis, a tick borne disease that mimics COVID-19 symptoms. Alex Connor, USA TODAY, "Just another day in democracy," 6 July 2020 Howe says pets with anaplasmosis may experience lack of appetite, joint pain, fever, lethargy or lameness. Chanel Stitt, Detroit Free Press, "Tick disease with coronavirus-like symptoms is on a rise in Michigan," 6 July 2020 The state also experienced increases in two other tickborne diseases, with 685 cases of anaplasmosis and 138 cases of babesiosis. USA TODAY, "Condom conflict, ghost net, smart trash bins: News from around our 50 states," 18 Jan. 2020 For both anaplasmosis and ehrlichiosis, symptoms typically start within two weeks after the bite. Patia Braithwaite, SELF, "8 Tick-Borne Illnesses That Aren’t Lyme Disease," 26 July 2019 The clinical signs for tickborne diseases like Lyme, ehrlichia, and anaplasmosis generally share a lot of similarities, Dr. de Jong says. Caroline Picard, Good Housekeeping, "What to Do If Your Dog Has a Tick Bite," 19 Apr. 2019 Ticks that transmit Lyme disease can also transmit other pathogens causing less-common diseases such as anaplasmosis and babesiosis. Sumathi Reddy, WSJ, "New Effort for Lyme Disease Vaccine Draws Early Fire," 9 July 2018 These include the bacterial infection anaplasmosis, which can lead to symptoms like fever, nausea, vomiting, and more, Rocky Mountain spotted fever, which can cause similar issues along with a splotchy rash, and other illnesses. Kate Sheridan, SELF, "Here’s Exactly What to Do if a Tick Bites You," 14 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'anaplasmosis.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of anaplasmosis

1910, in the meaning defined above

History and Etymology for anaplasmosis

New Latin Anaplasma, genus of gram-negative bacteria (from ana- ana- — perhaps erroneously for a- a- entry 2 — + -plasma -plasm) + -osis

Note: The genus name Anaplasma was introduced by the Swiss veterinarian Arnold Theiler (1867-1936) in "Anaplasma marginale (Gen. and spec. nov.): The Marginal Points in the Blood of Cattle Suffering from a Specific Disease," Transvaal Department of Agriculture, Report of the Government Veterinary Bacteriologist for the Year 1908-09 (Pretoria, 1910), pp. 7-63. Anaplasma marginale was the first rickettsial pathogen to be investigated, and Theiler was unsure of the nature of the organism: "All these various reasons induce me to consider the marginal points as parasites of protozoic character. They differ from any known blood parasite by the absence of a protoplasmatic body and consist only of chromatin substance, thus resembling, to a certain extent, the bacteria. They represent, in my opinion, a new genus of protozoa which I propose to call Anaplasma, and the species under consideration Anaplasma marginale" (p. 29). This comment would lead one to believe that Theiler actually had alpha privative in mind, and should have named the organism Aplasma rather than Anaplasma—it is not evident what significance the spatio-temporal prefix ana- could have here.

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The first known use of anaplasmosis was in 1910

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“Anaplasmosis.” Dictionary, Merriam-Webster, Accessed 21 Jan. 2021.

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More Definitions for anaplasmosis


an·​a·​plas·​mo·​sis | \ -ˌplaz-ˈmō-səs How to pronounce anaplasmosis (audio) \
plural anaplasmoses\ -​ˌsēz How to pronounce anaplasmosis (audio) \

Medical Definition of anaplasmosis

: infection with or a disease caused by bacteria of the genus Anaplasma affecting both humans and animals (such as dogs, horses, and cattle): such as
a : a disease of humans that is typically marked by fever, headache, chills, muscle aches, and fatigue and is caused by a bacterium (A. phagocytophilum synonym Ehrlichia phagocytophila) infecting granulocytes

called also ehrlichiosis, human granulocytic anaplasmosis, human granulocytic ehrlichiosis

b : a disease of cattle that is typically marked by anemia, fever, jaundice, weight loss, and death especially in adult animals and is caused by a bacterium (A. marginale) which infects and destroys red blood cells

called also gall sickness, galziekte

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