A nurse is collecting data from a client who was bitten by a tick one week ago. Which of the following client manifestations should the nurse identify as an indication of the development of Lyme disease?

Choice A rationale Necrosis at the site of a bite is more commonly associated with certain spider bites, such as the brown recluse, rather than a tick bite leading to Lyme disease. Borrelia burgdorferi, the causative spirochete of Lyme disease, triggers an inflammatory response but does not typically cause tissue death or necrotic sloughing at the inoculation site. Identifying necrosis would lead the nurse to investigate other environmental exposures or different bacterial infections like ecthyma or localized cellulitis. Choice B rationale An expanding circular rash, known as erythema migrans, is the classic early localized manifestation of Lyme disease, appearing in approximately 70 to 80 percent of infected individuals. It typically develops 3 to 30 days after the tick bite and often resembles a bullseye. This occurs as the spirochetes migrate outward through the dermis, triggering a localized immune reaction characterized by central clearing and a red peripheral ring. It is a key diagnostic indicator for starting antibiotics. Choice C rationale A decreased level of consciousness is an extreme neurological finding that is not typical of early-stage Lyme disease. While late-stage Lyme disease can involve the central nervous system, leading to meningitis, encephalitis, or encephalopathy, these manifestations usually take months or years to develop. One week after a tick bite, the infection is still in the early localized stage. Acute changes in consciousness would more likely suggest sepsis, severe meningitis, or other unrelated acute neurological events. Choice D rationale Swollen, painful joints, or Lyme arthritis, are characteristic of the late disseminated stage of the infection. This manifestation usually occurs months after the initial tick bite and involves large joints, most commonly the knees. One week after exposure, the client is in the early localized phase, where systemic symptoms are usually limited to flu-like malaise, fever, and the characteristic rash. While joint aches can occur early, frank swelling and severe arthritis are delayed inflammatory responses.