A defining and extremely limiting trait of the Roman numeral system is that it lacks a character to designate the number 0. The system also has no way to represent negative or decimal numbers. This all goes back to the fact that Roman numerals were developed primarily to count and keep track of things for commerce. defining and extremely limiting trait of the Roman numeral system is that it lacks a character to designate the number 0. The system also has no way to represent negative or decimal numbers. This all goes back to the fact that Roman numerals were developed primarily to count and keep track of things for commerce.
Francisella tularensis is a common gram negative bacteria that is found throughout the United States, but is most commonly located in the central states (Missouri, Arkansas, Illinois, Oklahoma, Tennesee). This small microbe is the cause of a medical condition diagnosed as rabbit fever (Tularemia).
Salmonella was discovered in 1884 by American scientist, Dr. Daniel Salmon. Salmonella enterica are rod shaped (baccillus) bacteria. They are commonly found in raw meat, chicken, contaminated water, and even egg shells. Upon entering the host such as an animal, it stays in its intestinal tract. Three variasions of Salmonella enterica are Typhi, Enteritidis, and Typhimurium. They DNA are almost identical.