4/30/2024 0 Comments Tick identification chart nh![]() 5, 6 For example, deer ticks are mostly active when temperatures are above 45˚F, and they thrive in areas with at least 85-percent humidity. ![]() The life cycle and prevalence of deer ticks are strongly influenced by temperature. Studies provide evidence that climate change has contributed to the expanded range of ticks, 4 increasing the potential risk of Lyme disease, such as in areas of Canada where the ticks were previously unable to survive. Deer do not harbor the bacteria that cause Lyme disease, but certain other hosts such as white-footed mice do, and ticks pick up the bacteria by feeding on these infected hosts. These ticks live not only on deer, but also on rodents, birds, and other host animals. 2, 3 Lyme disease is transmitted through the bite of certain species of infected ticks (referred to commonly as deer ticks) that carry the bacteria that cause Lyme disease. 1 However, the actual number of illnesses is likely greater than what is reported to health officials. In recent years, approximately 20,000–30,000 confirmed cases of Lyme disease per year have been reported to the Centers for Disease Control and Prevention (CDC). Lyme disease is the most common vector-borne disease (that is, a disease transmitted by mosquitoes, ticks, or fleas) in the United States. Lyme disease is a bacterial illness that can cause fever, fatigue, joint pain, and skin rash, as well as more serious joint and nervous system complications.
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