Nokea
A client has a Staphylococcus infection in a decubitus ulcer. In this case, Staphylococcus is the:
Correct Answer: B
Rationale: In the Agent-Host-Environment Model, Staphylococcus is the agent the causative factor triggering illness, here infecting a decubitus ulcer. The client is the host, whose skin integrity and immunity determine susceptibility. The environment bedridden conditions or hygiene sets the stage for infection. The disease is the resulting pathology, like the ulcer's worsening. This model dissects causation: Staphylococcus (bacteria) invades the host (client) in a conducive environment (immobility), driving nursing interventions cleaning wounds, repositioning to disrupt the triad. Understanding the agent's role guides targeted care, like antibiotics, breaking the infection cycle. It's a practical lens for nurses, pinpointing external triggers to prevent or manage illness effectively, especially in chronic wound scenarios.