1 An associate's degree in plumbing technology costs $3,000-$23,000. 2  Southwestern Illinois College offers an associate's degree program for $6,080 for in-district students and $23,744 for out-of-state tuition. Additional costs for plumbing training range from $500-$10,000, and may include books, tools, uniforms and living costs. 2  AC/C Tech in Indianapolis estimates additional plumbing program costs as $328 for tools and $369 for books, uniforms and safety equipment.
Louis Pasteur furthered the concept through his work in microbiology. The immunization was called vaccination because it was derived from a virus affecting cows (Latin: vaccaâcow). Smallpox was a contagious and deadly disease, causing the deaths of 20â60% of infected adults and over 80% of infected children.
Ferdinand Cohn was also the first to formulate a scheme for the taxonomic classification of bacteria. Louis Pasteur (1822â1895) and Robert Koch (1843â1910) were contemporaries of Cohnâs and are often considered to be the founders of medical microbiology. Pasteur is most famous for his series of experiments designed to disprove the then widely held theory of spontaneous generation, thereby solidifying microbiologyâs identity as a biological science.