In this month's Research Update, Dr. Brown looks at the consistent interest among scientists in mechanisms by which microbes adapt to challenge of antibiotics and how the microbes then pass these adaptations, via antibiotic resistant genes (ARGs), out into the world. This is an important issue for the big picture issue of the diminishing effectiveness of antibiotics in protecting from human diseases. A spotlight has been shone on wastewater treatment plants, concentrated animal feeding operations, and fish farms as principal environmental pathways for the spread of ARGs. Biosolids-borne ARGs are in the umbrella of this spotlight.  Her bottom line, after a review of 5 journal articles is that ARGs in biosolids are not a major concern, 

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