Persistence biological factors affecting

Aguilar, A., BorreH, A., and Pastor, T. (1999) Biological factors affecting variability of persistent pollutant levels in cetaceans. J. Cetacean Res. Manag., 1, 83-116. 

The interfacial microenvironment around a microbial community, that is the sum of the physical, chemical, and biological parameters which affect a microorganism, determines whether a particular microorganism will survive and/or metabolize. The occurrence and abundance of microorganisms in an environment are determined by nutrient availability, and various physicochemical factors such as pH, redox potential, temperature, and solid phase texture and moisture. Because a limitation imposed by any one of these factors can inhibit biodegradation, the cause of the persistence of a pollutant is sometimes difficult to pinpoint. The summary follows [39,92,94,97,109,110,172,173,176,189,190, 195,248-252,256-300]. 

The development of control strategies to reduce E. coli 0157 H7 will require the identification of biological, environmental, and/or management factors that affect its incidence in cattle and their production environments. Research investigations and epidemiological studies have identified a number of risk factors or management practices that can or may contribute to the occurrence of this pathogen, and that may be exploitable to reduce its numbers, persistence, and transmission in cattle. 

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