SERRATIA MARCESCENS by Carter Stanley is a background research paper for a science fair project based on the virus Serratis Marcescens and its antibiotics Tetracycline and Streptomycin.

SERRATIA MARCESCENS

Serratia marcescens is a pathogen that at atomic number 53 time, was considered to be harmless. However, testing conducted in the 20th century accidentally revealed just the opposite. The pivotal think over called Operation Sea Spray was conducted in the early 1950s. The unify States Army was testing how wind currents affected the spread of biochemical weapons. Giant balloons were filled with Serratia marcescens and floated over the city of San Francisco. The balloons were after burst and the supposed harmless Serratia marcescens was released over the city. within a matter of days, markedly high increases in pneumonia and urinary tract infections were reported by local doctors. Serratia marcescens was no longer thought to be innocuous.

Serratia marcescens is actually a hateful pathogen. A pathogen is an agent that causes disease or infection. Pathogens can normally be identified by their ability to metabolize lactose. Fermenters of lactose argon non-pathogenic and non-fermenters argon pathogenic. Anti-pathogenic agents, called antibiotics, are used to fight these diseases and infections. Antibiotics go away by targeting special diseased cells and not healthy full of life cells. Each antibiotic is usually able to fight one type of organism. Two examples are of antibiotics are Tetracycline and Streptomycin.

        The ubiquitous Serratia marcescens is a member of the family Enterobactieriaceae.



Members of this family are known to be some of the most pathogenic and common organisms encountered in microbiological studies. These bacterium are gram negative, rod shaped, and are most commonly seen causing intestinal infections. Although usually found in the intestine, they are also found in most natural habitats. few other sicknesses caused by these organisms are: Meningitis, Bacillary Dysentery, Typhoid, and food poisoning. Since legion(predicate) of the species in this family are very much alike, biochemical tests are necessary to differentiate among them. Laboratory tests used to differentiate among the species are...

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