Polymer emulsions, also referred to as polymer dispersions, latexes, latex emulsions, or latex dispersions, are used in an increasingly wide variety of applications including production of emulsion paints, adhesives, paper and textile coatings, nonwoven fabrics, and carpet-backing compounds. The pH of these polymer emulsions varies greatly, being acidic in the case of some ethylene vinyl acetate and polyvinyl acetate types while some acrylic, styrene acrylic, and styrene butadiene products can be relatively alkaline. Many types are susceptible to biodeterioration by microorganisms, although growth will depend on a number of environmental and nutritional factors. Once growth occurs, a number of effects may be noticed, including viscosity changes, production of gases and odors, color changes, and enzyme production with concomitant effects on manufactured end products. Microbiological infection and its effects can be avoided by controlling the quality of and use of less susceptible raw materials and intermediates, by improving plant design, cleanliness and hygiene, and by the use of effective, broad spectrum biocides.