Difficulty in choosing a Research Topic

I am enrolled in a fully funded PhD program. And pursuing my PhD from Ohio State University. I am in my first year and facing problems in deciding a proper research topic, our guide has given us a task of coming up with 5 fresh topics on which we can work on and for which resources are available in the university. My request is to provide me suggestion about who can guide me in deciding a research topic.My field of study is Epidemiology of Microbial Diseases. Thanks in advance for your valuable suggestions.

Posted in: Dissertation, Research