Hey there,
Several UCs offer Medical Microbiology / Immunology major/coursework but it doesn't seem like something you'd just "take" as part of a pre-requisite. It appears as though, for UC Irvine's Medical Microbio class, you must have completed "first term curriculum". I am sure this class would require you to be a matriculated UCI student. Anyway, for your information:
210A Medical Microbiology (4 to 6). Lecture, five hours; laboratory, three
hours. The biology of infectious agents, including viruses, bacteria, fungi,
and parasites, to provide the foundation in microbiology for the subsequent
study of infectious diseases. Lectures, small group sessions with clinicians,
and laboratory sessions are used to teach the molecular bases of microbial
pathogenesis, diagnostic testing, antimicrobial therapy, and prevention strategies.
Prerequisites: first-year curriculum. Graduate students must have
approval of the course director and enroll through the Department of Microbiology
and Molecular Genetics.
I am sure that every UC will have a similar policy. Taking a cursory glance through a random sampling of general catalogs in the Bio Science departments of 5 popular CCs in California, "medical microbiology" doesn't exist.
Bioethics turned up mostly the same stuff. From UCI:
M176 Bioethics (4) S. Lecture, three hours; discussion, one hour. Discusses
the ethical and social responsibilities of the pharmaceutical scientist and
entrepreneur. Issues explored include animal experimentation, clinical trials,
medicine, and economics as they are related to pharmaceutical sciences and
drug discovery and development.
An interesting note is that this is offered through a program called the Degree of Pharmaceutical Sciences.
UC Davis also offers Bioethics as a program of study through their medical school (As well as Med. Micro.)
http://www.ucdmc.ucdavis.edu/bioethics/
But again, in terms of CCs/online courses (Kaplan, Walden, UoPhoenix, Capella, etc) you look to be out of luck.
Have you considered a post-bacc program like the one UCSF and UCD offer? These are year-long courses though and very competitive, and I doubt they'd be very useful to you if you only require Bioethics and Med. Micro.
I see that you did say where you applied to... Might I suggest you call their admissions officer(s) and ask what classes, if any, can be of use to fulfill their pre-requisites. Perhaps Mississippi has different wording for classes? It's possible.
Good luck and I hope I could help.