Correction to: Chapter 1 in: D. Biswas, S.O. Rahaman (eds.), Gut Microbiome and Its Impact on Health and Diseases, https://doi.org/10.1007/978-3-030-47384-6_1

The original version of this chapter was revised. The co-author Dr. Ashley Houser’s name has been incorrectly mentioned as “Ashely” instead of “Ashley”. This is now updated in the chapter “Contribution of Human and Animal to the Microbial World and Ecological Balance.”