问题
单项选择题
The nurse is planning care for a female client diagnosed with acute hepatitis A virus (HAV). What's the primary mode of transmission for HAV ？（）
A．Fecal contamination and oral ingestion.
B．Exposure to contaminated blood.
C．Sexual activity with an infected partner.
D．Sharing a contaminated needle or syringe.
答案
参考答案：A
解析：
HAV is predominantly transmitted by the ingestion of fecally contaminated food. Transmission is more likely to occur with poor hygiene, crowded conditions, and poor sanitation. Hepatitis B and C may be transmitted through exposure to contaminated blood and blood products. Sexual activity with an infected partner and sharing contaminated needles or syringes may also transmit hepatitides B and C.