any infection caused by a microorganism that does not normally cause disease in humans; occurs in persons with abnormally functioning immune systems (as AIDS patients or transplant patients receiving immunosuppressive drugs)
双语例句
Or the fungus may simply be an opportunistic infection following a more profound sickness sweeping the animals. 也有可能是，蝙蝠受到一种更严重疾病的侵袭，之后真菌才有机会感染。
In some instances, patients develop opportunistic infections during this early phase of infection. 在某些时候，病人在感染初期会有机会感染的可能。
