A 10-Year-Old Boy Is Brought to the Office by His

A 10-year-old boy is brought to the office by his mother after being bitten on his leg by a tick.  The mother noticed a tick behind the boy's knee after a day trip to a nearby state park yesterday.  The tick was not present when the mother applied sunscreen to the boy at the park earlier that morning.  She was able to pull off the tick easily using household tweezers.  This morning, the patient had a red rash at the site of the bite but has no other symptoms.  The mother shows the small, non-engorged, brown tick wrapped in a tissue.  The patient has no prior medical problems and is up to date with recommended vaccines.  He has no known drug allergies.  The family recently moved to Massachusetts.  Vital signs are within normal limits.  There is a 0.5-cm erythematous macule in the left popliteal area with no lymphadenopathy.  The patient's mother is concerned that the patient may have contracted Lyme disease.  Which of the following is the best response?

A) He already has manifestations of early Lyme disease and needs antibiotic treatment.
B) He is not at increased risk of Lyme disease based on the color of the tick.
C) He most likely has local irritation from the tick bite, which needs no specific treatment.
D) There is always some risk of Lyme disease even if the tick has not yet started feeding.
E) We need to do a blood test to determine if his rash is from Lyme disease.