Variability in Antimicrobial Testing


Scientific fields such as physics and math are considered to be exact sciences. Biology, including microbiology, is different. Microbiological systems possess a greater number of uncontrollable variables which results in increased experimental complexity and decreased experimental accuracy.  The great number of variables at play in a given microbiological study arise from the inherent complexity of living systems. Each variable contributes a certain degree of error which, depending on the system, may propagate linearly or non-linearly.

Scientific & Regulatory Consultants, Inc

Scientific & Regulatory Consultants, Inc. (SRC) was started in 1996 by Sally Hayes and Rhonda Jones.

SRC offers over 90 years of combined service to the pesticide and antimicrobial industry. Their staff draws from a broad range of expertise including research, development, manufacturing, quality, and registration experience in the antimicrobial industry, as well as, extensive knowledge in chemistry, toxicology, and microbiology.


Toxcel is a medium-sized consulting firm with offices in Gainesville, Virginia and an affiliate location in the United Kindgom. It provides a range of scientific, technical, and regulatory consulting services including federal, state, and regional registrations in North America, Europe, and other international markets. One of Toxcel's main areas of expertise is the Federal Insecticide, Fungicide, and Rotenticide Act (FIFRA).

Delta Analytical Corporation

Delta Analytical Corporation is an antimicrobial and pesticide regulatory consulting firm located near EPA headquarters in the Washington, D.C. Metro area. The firm is most experienced with regard to federal and state registration of antimicrobial agents and pesticides, but well equipped to assist clients with other regulatory questions and issues in addition to US EPA pesticide registration.

Floor and Carpet Cleaners


Home floor care started way back in the early 19th century. With the advent of lavish home furnishings and the beginnings of carpeted and tiled floor, the need for cleaning devices grew rapidly. The Industrial Revolution sparked a great increase in technology and new machinery. As expected, the first floor cleaning devices were very rudimentary and could be difficult to use. As the 20th century got underway, floor cleaning technology leaped ahead. The modern vacuum design we know today took shape in 1905 and was manually powered.