Anaplasmosis is a disease caused by parasites, primarily ticks, which commonly affect ruminant animals such as cattle, deer, goats, and sheep. However, it is important to note that while rare, these ticks can also attach themselves to dogs and humans, leading to the direct transmission of anaplasmosis. The symptoms of this disease can vary, depending on factors such as the age and overall health of the infected individual.
Transmission
Anaplasmosis is caused by various strains of the bacteria Anaplasma. The most common strain that affects humans is known as Anaplasma phagocytophilum. Ticks become infected with the bacteria by feeding on animals that are already infected. Female ticks can also pass on the infection to their offspring. The primary mode of transmission to humans is through tick bites, although it is possible to contract the disease without being bitten by a tick. In some cases, individuals can have anaplasmosis without experiencing any symptoms, making it difficult to detect. However, if a person with undiagnosed anaplasmosis donates blood, the recipients may also become infected with the disease.
Understanding the Origins of Anaplasmosis in Humans
The emergence of anaplasmosis in humans dates back to 1990 when the first documented case was reported. A resident of Wisconsin fell victim to this tick-borne illness following a bite from an infected tick. Tragically, the patient succumbed to the disease a mere two weeks later. It wasn’t until 1994 that scientists were able to definitively identify the specific strain responsible for this condition, known as human granulocytic anaplasmosis (HGA), following years of dedicated research.
Interestingly, the symptoms of HGA closely resemble those of other tick-borne diseases such as Lyme disease and human monocytic ehrlichiosis. This makes it challenging to accurately diagnose the condition without thorough testing. From 1994 to 2010, the incidence rate of HGA infections has experienced a significant surge. In fact, prior to the year 2000, there were fewer than 300 reported cases annually. However, between 2009 and 2010 alone, there was a staggering 52 percent spike in the number of recorded cases.