Anaplasmosis – United States

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July 26, 2021 – 18 case of Anaplasmosis reported in Butler, Pennsylvania. Demographic information for the cases are not identified in this source. No deaths were reported.

Anaplasmosis is transmitted from infected ticks. It is suspected that the individual cases have come in contact with an infected tick, though not confirmed in source. Symptoms from anaplasmosis are fevers, muscle aches, and nausea.

Current plan of action includes keeping physicians aware of this infectious disease and what to look for when a patient reports feeling ill.

Photo: Rickettsial bacterium Anaplasma centrale infecting red blood cells of a cow. Arrow points to typical infected cell.

Anaplasmosis is a disease caused by a rickettsial parasite of ruminants (large hoofed herbivores). It can be contracted from tick bites. The most common tick that carries the bacterium is Ixodes scapularis, also known as the black-legged tick or the deer tick.

Classic signs and symptoms of anaplasmosis include fever, a decreased number of white blood cells, platelets in the bloodstream, and abnormally elevated levels of liver enzymes. A rash may appear at the site of the tick bite, as it is sometimes co-transmitted with Lyme disease.

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