Final answer:
When a patient from Hawaii presents with conjunctival injection, Leptospirosis is a possible condition to consider given the prevalence in tropical climates, but a thorough patient history and examination are necessary to explore other potential causes.
Step-by-step explanation:
If a patient presents with conjunctival injection and they are from Hawaii, one possible condition to consider is Leptospirosis. This bacterial disease is often contracted through exposure to water contaminated with the urine of infected animals. Conjunctival injection, which is the redness of the membrane covering the whites of the eyes, is one of the symptoms associated with Leptospirosis, along with fever, headache, muscle pain, and sometimes a rash. Considering Hawaii’s tropical climate and outdoor activities involving water exposure, Leptospirosis may be a higher concern. However, it is critical to conduct a thorough patient history and examination, and potentially consider other differential diagnoses that can present with conjunctival injection, such as viral conjunctivitis, allergic reactions or other systemic infectious diseases.