Anaplasmosis comes from parasites, specifically ticks that generally target ruminants such as cattle, deer, goats, and sheep. Though it is rare, these ticks may also latch onto dogs and humans and directly transmit anaplasmosis. Symptoms tend to vary depending on the age and general health of the infected animal or person.
Anaplasmosis results from infections of the bacteria Anaplasma and its many variations. Most human cases of anaplasmosis are due to Anaplasma phagocytophilum. Ticks tend to receive the disease by feeding on already-infected animals, though some females transmit it through their eggs. Most people contract the disease via a tick bite, though it is possible for a person to contract the disease without being bitten by a tick. In some cases, anaplasmosis is asymptomatic, and a person may have the disease and not be aware of it. If this person donates blood, recipients may contract anaplasmosis.
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