I gratefully acknowledge the contributions of the following people who help to create this report. I would like to express my sincere gratitude and appreciation to my advisor, Dr. Sujinan Meelai and the other two committee members: Dr. Saran Promsai and Dr. Yaowanoot Promnuan who kindly gave me beneficial advice, guidance, encouragement and empathetic understanding.
I would like to express my warm thanks to the microbiology students and staffs at Department of Microbiology, Faculty of Science, Silpakorn University for their friendship and help. Permission from various local authorities to collect in many sites is gratefully acknowledged. Appreciation goes to Dr. Sujinan Meelai for help with the report’s English.
This work was funded by the National Research University under the Office of the Higher Education Commission, and was also financially supported by the Faculty of Science, Silpakorn University-Sanam Chandra Palace Campus.
Finally, I would like to express my deepest gratitude to all members in “Rudeekijdumrong” family. Without their love, understanding, encouragement and faith in me, I would have never succeeded.