What are common diseases associated with ticks in the U.S. and what early symptoms should be monitored after exposure?

• A. Lyme disease, RMSF, anaplasmosis; early symptoms include fever, headache, fatigue, and sometimes a rash.
• B. Malaria, Dengue, Zika; early symptoms include nausea and joint pain.
• C. Tularemia, plague; early symptoms include cough and chest pain.
• D. West Nile, Chikungunya; early symptoms include vomiting and blurry vision.

Answer: (A)

Ticks are known to transmit several infections in the United States, and recognizing the early signs after exposure helps prompt care. The diseases listed are among the most commonly encountered tick-borne illnesses in the U.S., and the early symptoms—fever, headache, and fatigue—are typical nonspecific warning signs after a bite. Sometimes a rash accompanies these infections, especially in Lyme disease, though not everyone develops one, and the rash’s presence or absence can vary by illness.

Lyme disease, RMSF, and anaplasmosis are all associated with ticks and often begin with fever and malaise, with headaches as a frequent accompanying symptom. Lyme disease may reveal an erythema migrans rash at the bite site, but absence of a rash does not rule it out. RMSF commonly presents with fever and headache and may later show a rash. Anaplasmosis usually causes fever and flu-like symptoms, with rash occurring less consistently.

The other options mix illnesses that are not tick-borne or do not fit the typical early tick-borne presentation. Malaria, dengue, Zika, West Nile, and Chikungunya are transmitted primarily by mosquitoes, not ticks. Tularemia and plague have different transmission and classic early symptoms than the ones listed here. So the best choice focuses on the tick-borne infections and their common early signs after exposure.