Dr. Abdulanser  Salah Ibrahim and Dr. Ali Abdullah Al-Salama for their translation from English into Arabic the book of Michael Wilson " Bacteriology of Humans: An Ecological Perspective". The book offers a comprehensive study of microbial communities in human and their effect on growing and developing of human growth and development. Bacteriology of Humans: An Ecological Perspective book is a scientific reference that is rare in Arabic and this translation is a distinctive addition to the Arabic library and a step toward translating natural sciences and scientific references for university students.  Dr. Ibrahim and Dr. Al-Salama have succeeded to translate the original text in a correct wording and translation style.