The nurse is caring for an older adult client with heart failure (HF) and multiple comorbidities. Which finding(s) in the client’s history are consistent with the client developing HF? (Select all that apply)

Choice A reason: A furuncle is a painful abscess caused by Staphylococcus aureus infecting a hair follicle, leading to purulent, tender nodules. This bacterial etiology is the primary risk factor, as S. aureus colonizes skin and invades follicles, causing localized infection. This aligns with dermatological pathology for furuncle development.

Choice B reason: Insect or spider bites may cause secondary infections but are not the primary etiology of furuncles. Furuncles specifically result from S. aureus folliculitis. Bites cause different lesions, like cellulitis, making this incorrect for the typical pathological process leading to a furuncle’s formation.

Choice C reason: Inadequate blood supply may impair healing but does not directly cause furuncles. S. aureus infection of hair follicles is the primary etiology. Poor perfusion is a risk for chronic wounds, not acute folliculitis, making this incorrect for the pathological etiology of a furuncle.

Choice D reason: Sexual contact with an infected partner may transmit STDs but is unrelated to furuncles, which are caused by S. aureus skin infections. Furuncles are not sexually transmitted, making this incorrect, as the etiology is bacterial colonization of hair follicles, not interpersonal transmission.

Choice A reason: Pre-existing skin organisms, like Staphylococcus, colonize burn wounds and eschar, thriving in damaged tissue with impaired barriers. Burns disrupt skin integrity, allowing microbial invasion and biofilm formation, increasing infection risk. This is a primary reason for burn wound infections, supported by wound care microbiology.

Choice B reason: Burned epithelium loses its ability to produce antimicrobial peptides, which normally inhibit bacterial growth. This reduction weakens local defenses, allowing pathogens to proliferate in the wound. Compromised epithelial function is a key factor in burn infections, as it diminishes the skin’s innate immune response.

Choice C reason: Increased basal metabolic rate and heat radiation in burns elevate systemic stress but do not directly cause wound infections. While metabolism impacts healing, it is not a primary infection driver. Local factors like microbial colonization and loss of skin barriers are more directly responsible for burn wound infections.

Choice D reason: The skin’s acidic pH, which inhibits bacterial growth, is compromised in burns due to tissue destruction. This loss of the protective acid mantle allows pathogens to invade more easily, increasing infection risk. This is a critical pathophysiological reason for burn wound susceptibility, per dermatological infection models.

Choice E reason: Loss of serum proteins in burns, due to exudative leakage, impairs humoral immunity, including complement and antibody function. This weakens systemic defenses against wound pathogens, increasing infection risk. Protein loss is a recognized factor in burn-related immunosuppression, contributing to the high incidence of wound infections.