Anaplasmosis is a bacterial infection caused by the bacterium Anaplasma phagocytophilum. It is primarily transmitted to humans through tick bites and commonly affects people in the upper Midwest and northeastern United States, as well as parts of Europe and Asia. It can cause a range of flu-like symptoms.
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Human granulocytic anaplasmosis (HGA) was first recognized as a distinct human disease in the United States in 1990 in Wisconsin and Minnesota. It was initially identified as human granulocytic ehrlichiosis before the causative agent was reclassified. Its discovery highlighted the expanding spectrum of tick-borne diseases affecting humans.
Anaplasmosis is primarily transmitted to humans through the bite of an infected tick. In the United States, the **blacklegged tick** (*Ixodes scapularis*) is the main vector in the Northeast and Midwest, and the **western blacklegged tick** (*Ixodes pacificus*) on the Pacific coast. Ticks acquire the bacteria by feeding on infected animals such as white-footed mice and other small mammals, then transmit it during subsequent blood meals.
Période de Contagiosité : Varies by disease
1 country with reported activity. Updated from real-time surveillance data.
Renseignements en temps réel issus de la surveillance sanitaire mondiale et de la surveillance par IA
Sources de données : BEACON, ProMED, OMS, CDC et plus de 50 agences nationales de santé
✓ Données en direct mises à jour en temps réel depuis les sources de santé mondiales
On his sprawling property in the heart of the Ottawa Valley, Martin Haché has seen deer, wild turkeys and even a mama bear with her cubs. But the 80-year-old retired accountant has never spotted a tick.
So, in July, 2025, ticks were the furthest thing from Mr. Haché's mind when he suddenly became ill and collapsed in the bathroom, too weak to even lift his head. After he fell two more times, his wife, Kathleen, called 911 and Mr. Haché was rushed to a nearby hospital, where he became deliriou
đź“° 14 news sources reporting on this story.
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Informations fiables provenant des principales organisations de santé
Directives officielles des Centers for Disease Control and Prevention des États-Unis
Voir les Ressources du CDC →Surveillance mondiale des maladies et directives de l'Organisation Mondiale de la Santé
Voir les Ressources de l'OMS →Les informations sur les maladies sur Virus Watcher sont révisées par notre Épidémiologiste en Chef, ancien analyste principal du CDC pour les prévisions FluSight. Les données épidémiques sont agrégées à partir de sources vérifiées notamment BEACON, ProMED, OMS, CDC et plus de 50 agences nationales de santé. Ces informations sont à des fins éducatives et ne doivent pas remplacer les conseils médicaux professionnels.
Dernière révision : 2026-08-13
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