Final answer:
The symptoms described suggest an infectious process consistent with a tickborne disease like Lyme disease, which is associated with Borrelia burgdorferi. The presentation aligns with relapsing fever symptoms, and for a patient with fever and swollen lymph nodes after a visit to New Mexico, Borrelia burgdorferi testing is indicated.
Step-by-step explanation:
The question describes a scenario where an individual experiences a sudden fever with myalgia (muscle pain). This symptomatology suggests an infectious process that could be related to various conditions, including tickborne diseases like Lyme disease caused by Borrelia burgdorferi.
The fever, headache, and muscle aches mentioned in the Clinical Focus sections resemble the presentation of conditions such as relapsing fever and possible bacterial infections sustained from environmental exposures or insect bites. Regarding the question about a person arriving in England with fever and swollen lymph nodes after a visit to New Mexico, the doctor should test for Borrelia burgdorferi, which is the bacteria responsible for Lyme disease, as the presentation suggests a tickborne disease rather than Salmonellosis caused by Salmonella enterica.