Rickettsia prowazekii causes epidemic typhus. It is spread by lice. Brill-Zinsser disease is a mild form of epidemic typhus. It occurs when the bacteria re-activates in a person who was previously infected.It is more common in the elderly.t is spread by lice. Brill-Zinsser disease is a mild form of epidemic typhus. It occurs when the bacteria re-activates in a person who was previously infected. It is more common in the elderly.
In this article. When you look at your prescription for eyeglasses, you will see numbers listed under the headings of OS and OD. They are Latin abbreviations: OS (oculus sinister) means the left eye and OD (oculus dextrus) means the right eye. Occasionally, you will see a notation for OU, which means something involving both eyes.
Report Abuse. A&O refers to Awake and Oriented. So if the say the patient is A&O x O that means the person is awake, but they do not know who they are, where they are, or what time it is. Melissa K Â· 8 years ago.Thumbs up. 1. Thumbs down. 1. Comment. Add a comment. Submit.ou can add a 4th (for AOx4), and that would be if they are able to describe recent events leading up to the accident, illness, or whatever. To avoid confusion, if a patient is not AOx3 (or 4) I describe exactly what the deviation is.