Only recently have we begun to appreciate the role of microbiome in health and disease. Environmental factors and change of life style including diet significantly shape human microbiome that in turn appears to modify gut barrier function affecting nutrient & electrolyte absorption and inflammation. Approaches that can reverse the gut dysbiosis represent as reasonable and novel strategies for restoring the balance between host and microbes. In the book, we offer summary and discussion on the advances in understanding of pathophysiological mechanisms of microbial host interactions in human diseases. We will not only discuss intestinal bacterial community, but also viruses, fungi and oral microbiome. Microbiome studies will facilitate diagnosis, functional studies, drug development and personalized medicine. Thus, this book will further highlight the microbiome in the context of health and disease, focusing on mechanistic concepts that underlie the complex relationships between host and microbes.

The objective of the first chapter is to explain fertility preservation decisions as related to reproductive-aged cancer patients experiences and desires for future fertility. The second chapter discusses fertility preservation and how it can be used to help cancer patients retain their fertility. It is an emerging discipline that now plays a central role in the care of reproductive women with cancer. This chapter examines several key factors underlying why more men who have sex with other men are not using Pre-Exposure Prophylaxis, including (1) lack of awareness of Pre-Exposure Prophylaxis, (2) lack of exposure to other Pre-Exposure Prophylaxis users, (3) general lack of interest in learning more about Pre-Exposure Prophylaxis, (4) lack of willingness to avail themselves of existing information sources and resources to learn more about Pre-Exposure Prophylaxis, (5) perceived stigma associated with the use of Pre-Exposure Prophylaxis, and (6) perceived obstacles needing to be overcome in order to give Pre-Exposure Prophylaxis adoption more serious consideration. The aims of this chapter is to describe some of these recent studies, showing the potential of the flavonoids anthocyanins, flavones, quercetin, hesperetin and naringenin in the control of adipocyte inflammation. The possible biochemical pathways will be presented, as well as the results observed in in vitro and in vivo studies. Chapter five explains how plasma transthyretin measures the methionine role in metabolic processes that requires deregulating the transsulfuration pathway and methylating homocysteine. It measures nutritional wellbeing and the impact of metabolism on the outcomes of human disease in relationship to severe inflammatory disorders, chronic disease, and cancer. The final chapter examines chronic kidney disease and how it is a significant burden on the economy and healthcare system globally as the patients suffering from it requires long term renal replacement therapy in the form of dialysis or renal transplant.