Masaaki Kitajima

Hi, thank you for visiting Masaaki Kitajima's Personal Website. I specialize in environmental engineering and microbiology and currently work at Hokkaido University in Japan as an Assistant Professor. I love working with passionate people and sharing what I've learned with them. This website is my window to the world where you can find more about me and then get in touch for a chat about potential projects.

Number of papers published/accepted: 92

• Total citations: 1487 (Scopus)
• h-index: 25 (Scopus)

(* Corresponding author)

2007

1. Eiji Haramoto*, Masaaki Kitajima, Hiroyuki Katayama, Shinichiro Ohgaki. 2007. Detection of koi herpesvirus DNA in river water in Japan. Journal of Fish Diseases. 30(1):59-61. (DOI: 10.1111/j.1365-2761.2007.00778.x)

2008

1. Masaaki Kitajima*, Yukinobu Tohya, Koichi Matsubara, Eiji Haramoto, Etsuko Utagawa, Hiroyuki Katayama, Shinichiro Ohgaki. 2008. Use of murine norovirus as a novel surrogate to evaluate resistance of  human norovirus to free chlorine disinfection in drinking water supply system. Environmental Engineering Research. 45:361-370. [In Japanese] [Environmental Engineering Forum Best Paper Award]

2. Nguyen Thi Van Ha*, Masaaki Kitajima, Nguyen Vo Minh Hang, Koichi Matsubara, Satoshi Takizawa, Hiroyuki Katayama, Kumiko Oguma, Shinichiro Ohgaki. 2008. Bacterial contamination of raw vegetables, vegetable-related water and river water in Ho Chi Minh City, Vietnam. Water Science and Technology. 58(12):2403-2411. (DOI: 10.2166/wst.2008.435)

2009

1. Eiji Haramoto*, Masaaki Kitajima, Hiroyuki Katayama, Takafumi Ito, Shinichiro Ohgaki. 2009. Development of virus concentration methods for detection of koi herpesvirus in water. Journal of Fish Diseases. 32(3):297-300. (DOI: 10.1111/j.1365-2761.2008.00977.x)
2. Eiji Haramoto*, Masaaki Kitajima, Hiroyuki Katayama, Mari Asami, Michihiro Akiba, Shoichi Kunikane. 2009. Application of real-time PCR assays to genotyping of F-specific phages in river water and sediments in Japan. Water Research. 43(15):3759-3764. (DOI: 10.1016/j.watres.2009.05.043)
3. Masaaki Kitajima*, Koichi Matsubara, Sethy Sour, Eiji Haramoto, Hiroyuki Katayama, Shinichiro Ohgaki. 2009. First detection of genotype 3 hepatitis E virus RNA in river water in Cambodia. Transactions of the Royal Society of Tropical Medicine and Hygiene. 103(9):955-957. (DOI: 10.1016/j.trstmh.2009.04.004)
4. Masaaki Kitajima*, Tomoichiro Oka, Yukinobu Tohya, Hiroyuki Katayama, Naokazu Takeda, Kazuhiko Katayama. 2009. Development of a broadly reactive nested reverse transcription-PCR assay to detect  murine noroviruses, and investigation of the prevalence of murine noroviruses in laboratory mice in Japan. Microbiology and Immunology. 53(9):531-534. (DOI: 10.1111/j.1348-0421.2009.00152.x)

5. Masaaki Kitajima*, Eiji Haramoto, Chanetta Phanuwan, Hiroyuki Katayama, Shinichiro Ohgaki. 2009. Detection of genogroup IV norovirus in wastewater and river water in Japan. Letters in Applied Microbiology. 49(5):655-658. (DOI: 10.1111/j.1472-765X.2009.02718.x)

6. Yuko Shimizu, Hiroshi Ushijima*, Masaaki Kitajima, Hiroyuki Katayama, Yukinobu Tohya. 2009. Murine norovirus as a novel surrogate to evaluate disinfectants for human norovirus. Japanese Journal of Environmental Infections. 24(6):388-394. [in Japanese]

2010

1. Eiji Haramoto*, Masaaki Kitajima, Hiroyuki Katayama, Shinichiro Ohgaki. 2010. Real-time PCR detection of adenoviruses, polyomaviruses, and torque teno viruses in river water in Japan. Water Research. 44(6):1747-1752. (DOI: 10.1016/j.watres.2009.11.043)
2. Masaaki Kitajima*, Tomoichiro Oka, Eiji Haramoto, Hiroyuki Katayama, Naokazu Takeda, Kazuhiko Katayama, Shinichiro Ohgaki. 2010. Detection and genetic analysis of human sapoviruses in river water in Japan. Applied and Environmental Microbiology. 76(8):2461-2467. (DOI: 10.1128/AEM.02739-09)
3. Masaaki Kitajima*, Yukinobu Tohya, Koichi Matsubara, Eiji Haramoto, Etsuko Utagawa, Hiroyuki Katayama. 2010. Chlorine inactivation of human norovirus, murine norovirus and poliovirus in drinking water. Letters in Applied Microbiology. 51(1):119-121. (DOI: 10.1111/j.1472-765X.2010.02869.x)
4. Eiji Haramoto*, Mikie Otagiri, Masaaki Kitajima, Kei Nishida, Yasushi Sakamoto. 2010. Analysis of human-animal fecal contamination in aquatic environments using F-specific RNA coliphages. Journal of Water and Waste. 52 (8):640-646. [In Japanese]
5. Masaaki Kitajima*, Tomoichiro Oka, Eiji Haramoto, Naokazu Takeda, Kazuhiko Katayama, Hiroyuki Katayama. 2010. Seasonal distribution and genetic diversity of genogroups I, II, and IV noroviruses in the Tamagawa River, Japan. Environmental Science & Technology. 44(18):7116-7122. (DOI: 10.1021/es100346a)
6. Masaaki Kitajima*, Tomoichiro Oka, Hirotaka Takagi, Yukinobu Tohya, Hiroyuki Katayama, Naokazu Takeda, Kazuhiko Katayama. 2010. Development and application of a broadly reactive real-time reverse transcription-PCR assay to detect murine noroviruses. Journal of Virological Methods. 169(2):269-273. (DOI: 10.1016/j.jviromet.2010.07.018)
7. Masaaki Kitajima*, Hiroyuki Katayama, Charles N. Haas, Hiroaki Furumai. 2010. Quantitative risk assessment of H5N1 highly pathogenic avian influenza virus infections through water. Environmental Engineering Research. 47:485-496. [In Japanese] [Environmental Engineering Forum Best Paper Award for Young Professionals] [Japan Society of Civil Engineers (JSCE) Best Paper Award for Young Professionals]

2011

1. Masaaki Kitajima*, Tomoichiro Oka, Eiji Haramoto, Chanetta Phanuwan, Naokazu Takeda, Kazuhiko Katayama, Hiroyuki Katayama. 2011. Genetic diversity of genogroup IV noroviruses in wastewater in Japan. Letters in Applied Microbiology. 52(2):181-184. (DOI: 10.1111/j.1472-765X.2010.02980.x)
2. Kyungju Kim*, Hiroyuki Katayama, Masaaki Kitajima, Yukinobu Tohya, Shinichiro Ohgaki. 2011. Development of a real-time RT-PCR assay combined with ethidium monoazide treatment for RNA viruses and its application to detect viral RNA after heat exposure. Water Science and Technology. 63(3):502-507. (DOI: 10.2166/wst.2011.249)
3. Masaaki Kitajima*, Eiji Haramoto, Chanetta Phanuwan, Hiroyuki Katayama. 2011. Prevalence and genetic diversity of Aichi viruses in wastewater and river water in Japan. Applied and Environmental Microbiology. 77(6):2184-2187. (DOI: 10.1128/AEM.02328-10)
4. Yuko Shimizu, Masaaki Kitajima, Yuko Hayakawa, Yukinobu Tohya, Hiroshi Ushijima*. 2011. Inactivation of murine norovirus in breast milk by heat treatment. Journal of Environmental Infections. 26(2):79-82. [In Japanese]
5. Masaaki Kitajima*, Eiji Haramoto, Chanetta Phanuwan, Hiroyuki Katayama. 2011. Genotype distribution of human sapoviruses in wastewater in Japan. Applied and Environmental Microbiology. 77(12):4226-4229. (DOI: 10.1128/AEM.00088-11)
6. Akihiko Hata*, Hiroyuki Katayama, Masaaki Kitajima, Chettiyappan Visvanathan, Chea Nol, Hiroaki Furumai. 2011. Validation of internal controls for nucleic acid extraction and amplification of enteric viruses in water samples. Applied and Environmental Microbiology. 77(13):4336-4343. (DOI: 10.1128/AEM.00077-11)
7. Masaaki Kitajima*, Yin Huang, Toru Watanabe, Hiroyuki Katayama, Charles N. Haas. 2011. Dose-response time modelling for highly pathogenic avian influenza A (H5N1) virus infection. Letters in Applied Microbiology. 53(4):438-444. (DOI: 10.1111/j.1472-765X.2011.03128.x)

2012

1. Masaaki Kitajima*, Eiji Haramoto, Chanetta Phanuwan, Hiroyuki Katayama, Hiroaki Furumai. 2012. Molecular detection and genotyping of human noroviruses in influent and effluent water at a wastewater treatment plant in Japan. Journal of Applied Microbiology. 112(3):605-613. (DOI: 10.1111/j.1365-2672.2012.05231.x)
2. Eiji Haramoto*, Mikie Otagiri, Hiroshi Morita, Masaaki Kitajima. 2012. Genogroup distribution of F-specific coliphages in wastewater and river water in the Kofu basin in Japan. Letters in Applied Microbiology. 54(4):367-373. (DOI: 10.1111/j.1472-765X.2012.03221.x)
3. Eiji Haramoto*, Masaaki Kitajima, Naohiro Kishida, Hiroyuki Katayama, Mari Asami, Michihiro Akiba. 2012. Occurrence of viruses and protozoa in drinking water sources of Japan and their relationship to indicator microorganisms. Food and Environmental Virology. 4(3):93-101. (DOI: 10.1007/s12560-012-9082-0)

2013

1. Akihiko Hata*, Masaaki Kitajima, Hiroyuki Katayama. 2013. Occurrence and reduction of human viruses, F-specific RNA coliphage genogroups and microbial indicators at a full-scale wastewater treatment plant in Japan. Journal of Applied Microbiology. 114(2):545-554. (DOI: 10.1111/jam.12051)
2. Brandon C. Iker, Kelly R. Bright, Ian L. Pepper, Charles P. Gerba, Masaaki Kitajima*. 2013. Evaluation of commercial kits for the extraction and purification of viral nucleic acids from environmental and fecal samples. Journal of Virological Methods. 191(1):24-30. (DOI: 10.1016/j.jviromet.2013.03.011)
3. Setsuko Iizuka, Reiko Takai-Todaka, Hitoshi Ohshiro, Masaaki Kitajima, Qiuhong Wang, Linda J. Saif, Takaji Wakita, Mamoru Noda, Kazuhiko Katayama, Tomoichiro Oka*. 2013. Detection of multiple human sapoviruses from imported frozen individual clams. Food and Environmental Virology. 5(2):119-125. (DOI: 10.1007/s12560-013-9109-1)
4. Eiji Haramoto*, Masaaki Kitajima, Mikie Otagiri. 2013. Development of a reverse transcription-quantitative PCR assay for detection of salivirus/klassevirus. Applied and Environmental Microbiology. 79(11):3529-3532. (DOI: 10.1128/AEM.00132-13)
5. Masaaki Kitajima*, Akihiko Hata, Teruo Yamashita, Eiji Haramoto, Hiroko Minagawa, Hiroyuki Katayama. 2013. Development of a reverse transcription-quantitative PCR system for detection and genotyping of Aichi viruses in clinical and environmental samples. Applied and Environmental Microbiology. 79(13):3952–3958. (DOI: 10.1128/AEM.00820-13)
6. Gerardo U. Lopez*, Charles P. Gerba, Akrum Tamimi, Masaaki Kitajima, Sheri Maxwell, Joan B. Rose. 2013. Transfer efficiency of bacteria and viruses from porous and nonporous fomites to fingers under different relative humidity conditions. Applied and Environmental Microbiology. 79(18):5728–5734. (DOI: 10.1128/AEM.01030-13)
7. Eiji Haramoto*, Masaaki Kitajima, Naohiro Kishida, Yoshiaki Konno, Hiroyuki Katayama, Mari Asami, Michihiro Akiba. 2013. Occurrence of pepper mild mottle virus in drinking water sources in Japan. Applied and Environmental Microbiology. 79(23):7413-7418. (DOI: 10.1007/s12560-012-9082-0)

2014

1. Akihiko Hata*, Hiroyuki Katayama, Keisuke Kojima, Shoichi Sano, Ikuro Kasuga, Masaaki Kitajima, Hiroaki Furumai. 2014. Effects of rainfall events on the occurrence and detection efficiency of viruses in river water impacted by combined sewer overflows. Science of the Total Environment. 468-469:757-763. (DOI: 10.1016/j.scitotenv.2013.08.093)
2. Akihiko Hata*, Masaaki Kitajima, Etsuko Tajiri-Utagawa, Hiroyuki Katayama. 2014. Development of a high resolution melting analysis for detection and differentiation of human astroviruses. Journal of Virological Methods. 200:29-34. (DOI: 10.1016/j.jviromet.2014.01.023)
3. Damian H. Gilling, Masaaki Kitajima, Jason R. Torrey, Kelly R. Bright*. 2014. Antiviral efficacy and mechanisms of action of oregano essential oil and its primary component carvacrol against murine norovirus. 2014. Journal of Applied Microbiology. 116(5): 1149-1163. (DOI: 10.1111/jam.12453)
4. Masaaki Kitajima*, Eiji Haramoto, Brandon C. Iker, Charles P. Gerba. 2014. Occurrence of Cryptosporidium, Giardia, and Cyclospora in influent and effluent water at wastewater treatment plants in Arizona. 2014. Science of the Total Environment. 484:129-136. (DOI: 10.1016/j.scitotenv.2014.03.036)
5. Gerardo U. Lopez, Masaaki Kitajima, Aaron Havas, Charles P. Gerba, Kelly A. Reynolds*. 2014. Evaluation of a disinfection wipe intervention on fomite-to-finger microbial transfer. Applied and Environmental Microbiology. 80(10):3113-3118. (DOI: 10.1128/AEM.04235-13)
6. Masaaki Kitajima*, Brandon C. Iker, Ian L. Pepper, Charles P. Gerba. 2014. Relative abundance and treatment reduction of viruses during wastewater treatment processes – Identification of potential viral indicators. Science of the Total Environment. 488-489:290-296. (DOI: 10.1016/j.scitotenv.2014.04.087)
7. Damian H. Gilling, Masaaki Kitajima, Jason R. Torrey, Kelly R. Bright*. 2014. Mechanisms of antiviral action of plant antimicrobials against murine norovirus. Applied and Environmental Microbiology. 80(16):4898-910 (DOI: 10.1128/AEM.00402-14)
8. Masaaki Kitajima*, Brandon C. Iker, Andri T. Rachmadi, Eiji Haramoto, Charles P. Gerba. 2014. Quantification and genetic analysis of salivirus/klassevirus in wastewater in Arizona, USA. Food and Environmental Virology. 6(3):213-216. (DOI: 10.1007/s12560-014-9148-2)
9. Walter Q. Betancourt, Masaaki Kitajima, Alexandre D. Wing, Julia Regnery, Jörg E. Drewes, Ian L. Pepper, Charles P. Gerba*. Assessment of virus removal by managed aquifer recharge at three full-scale operations. 2014. Journal of Environmental Science and Health, Part A. 49(14):1685-1692. (DOI: 10.1080/10934529.2014.951233)
10. Samendra P. Sherchan*, Masaaki Kitajima, Charles P. Gerba, Ian L. Pepper. Rapid detection technologies for monitoring microorganisms in water. Biosensors Journal. 3(1):109. (DOI: 10.4172/2090-4967.1000109)

2015

1. Akihiko Hata*, Katsuhito Matsumori, Masaaki Kitajima, Hiroyuki Katayama. 2015. Concentration of enteric viruses in large volumes of water using a cartridge-type mixed cellulose ester membrane. Food and Environmental Virology. 7(1):7-13. (DOI: 10.1007/s12560-014-9169-x)
2. Masaaki Kitajima*, Charles P. Gerba. 2015. Aichi virus 1: Environmental occurrence and behavior. Pathogens. 4(2):256-268. (DOI: 10.3390/pathogens4020256)
3. Masaaki Kitajima*, Andri T. Rachmadi, Brandon C. Iker, Eiji Haramoto, Ian L. Pepper, Charles P. Gerba. 2015. Occurrence and genetic diversity of human cosavirus in raw and treated wastewater in Arizona, United States. Archives of Virology. 160(7):1775-1779. (DOI: 10.1007/s00705-015-2435-x)
4. Akihiko Hata*, Hiroyuki Katayama, Masaaki Kitajima, Hiroaki Furumai. 2015. Wastewater analysis indicates that genetically diverse astroviruses, including strains belonging to novel clades MLB and VA, are circulating within Japanese populations. Applied and Environmental Microbiology. 81(15):4932-4939. (DOI: 10.1128/AEM.00563-15)
5. Anne Magill-Collins, Marlene Gaither, Charles P. Gerba, Masaaki Kitajima, Brandon C. Iker, James D. Stoehr*. 2015. Norovirus outbreaks among Colorado River rafters in the Grand Canyon, summer 2012. Wilderness & Environmental Medicine. 26(3):312-318. (DOI: 10.1016/j.wem.2015.02.007)
6. Gerardo U. Lopez*, Masaaki Kitajima, Samendra P. Sherchan, Jonathan D. Sexton, Laura Y. Sifuentes, Charles P. Gerba, Kelly A. Reynolds. 2015. Impact of disinfectant wipes on the risk of Campylobacter jejuni infection during raw chicken preparation in domestic kitchens. Journal of Applied Microbiology. 119(1):245-252. (DOI: 10.1111/jam.12834)

2016

1. Chen-Xi Sun, Masaaki Kitajima, Karina Yew-Hoong Gin*. 2016. Sunlight inactivation of somatic coliphage in the presence of natural organic matter. Science of the Total Environment. 541:1-7. (DOI: 10.1016/j.scitotenv.2015.08.136)
2. Andri T. Rachmadi, Masaaki Kitajima, Ian L. Pepper, Charles P. Gerba*. 2016. Enteric and indicator virus removal by surface flow wetlands. Science of the Total Environment. 542(Part A): 976-982. (DOI: 10.1016/j.scitotenv.2015.11.001)
3. Bradley W. Schmitz*, Masaaki Kitajima, Maria E. Campillo, Charles P. Gerba, Ian L. Pepper. 2016. Virus reduction during advanced Bardenpho and conventional wastewater treatment processes. Environmental Science & Technology. 50(17), 9524–9532. (DOI: 10.1021/acs.est.6b01384)
4. Andri T. Rachmadi, Jason R. Torrey, Masaaki Kitajima*. 2016. Human polyomavirus: Advantages and limitations as a human-specific viral marker in aquatic environments. Water Research. 105, 456-469. (DOI: 10.1016/j.watres.2016.09.010)
5. Masaaki Kitajima*, Andri T. Rachmadi, Brandon C. Iker, Eiji Haramoto, Charles P. Gerba. 2016. Genetically distinct genogroup IV norovirus strains identified in wastewater. Archives of Virology. 161(12), 3521-3525. (DOI: 10.1007/s00705-016-3036-z)
6. Masaaki Kitajima*, Nan Wang, Martin Q.X. Tay, Jianmin Miao, Andrew J. Whittle. 2016. Development of a MEMS-based electrochemical aptasensor for norovirus detection. Micro & Nano Letters. 11(10), 582-585. (DOI: 10.1049/mnl.2016.0295)
7. Toshihiro Ito, Mamoru Oshiki, Naohiro Kobayashi, Tsuyoshi Kato, Takahiro Segawa, Masashi Hatamoto, Takashi Yamaguchi, Hideki Harada, Masaaki Kitajima, Satoshi Okabe, Daisuke Sano*. 2016. Determination of performance target values for enteric virus removal in wastewater reclamation. Journal of Japan Society of Civil Engineers. 72(7), 305-313. [in Japanese]
8. Yi Yang, Masaaki Kitajima, Thuy T. Pham, Ling Yu, Ran Ling, Karina Y.-H. Gin, Martin Reinhard*. 2016. Using Pseudomonas aeruginosa PAO1 to evaluate hydrogen peroxide as a biofouling control agent in membrane treatment systems. Letters in Applied Microbiology. 63(6), 488-494. (DOI: 10.1111/lam.12674)

2017

1. Charles P. Gerba, Walter Q. Betancourt*, Masaaki Kitajima. How much reduction of virus is needed for recycled water: A continuous changing need for assessment? Water Research. 108, 25-31. (DOI: 10.1016/j.watres.2016.11.020)
2. Masaaki Kitajima*, Brandon C. Iker, Anne Magill-Collins, Marlene Gaither, James D. Stoehr, Charles P. Gerba. 2017. Genetic analysis of norovirus strains that caused gastroenteritis outbreaks among river rafters in the Grand Canyon, Arizona. Food and Environmental Virology. (DOI: 10.1007/s12560-017-9282-8)
3. Eiji Haramoto*, Masaaki Kitajima. 2017. Quantification and genotyping of Aichi virus 1 in water samples in the Kathmandu Valley, Nepal. Food and Environmental Virology. 9(3), 350-353. (DOI:10.1007/s12560-017-9283-7)
4. Mohan Amarasiri, Masaaki Kitajima, Thanh H. Nguyen, Satoshi Okabe, Daisuke Sano*. 2017. Bacteriophage removal efficiency as a validation and operational monitoring tool for virus log reduction in wastewater reclamation: Review. Water Research. 121, 258-269. (DOI:10.1016/j.watres.2017.05.035)
5. Toshihiro Ito, Masaaki Kitajima, Tsuyoshi Kato, Satoshi Ishii, Takahiro Segawa, Satoshi Okabe, Daisuke Sano*. 2017. Target virus log₁₀ reduction values determined for two reclaimed wastewater irrigation scenarios in Japan based upon tolerable annual disease burden. Water Research. 125, 438-448. (DOI:10.1016/j.watres.2017.08.057)
6. Ya Zhang, Masaaki Kitajima, Andrew J. Whittle, Wen-Tso Liu*. 2017. Benefits of genomic insights and CRISPR-Cas signatures to monitor potential pathogens across drinking water production and distribution systems. Frontiers in Microbiology. 8, 2036. (DOI:10.3389/fmicb.2017.02036)

1. Daisuke Sano*, Megumi Tazawa, Manami Inaba, Syunsuke Kadoya, Ryosuke Watanabe, Takayuki Miura, Masaaki Kitajima, Satoshi Okabe. 2018. Selection of cellular genetic markers for the detection of infectious poliovirus. Journal of Applied Microbiology. 124(4), 1001-1007. (DOI:10.1111/jam.13621)
2. Charles P. Gerba, Walter Q. Betancourt*, Masaaki Kitajima, Channah M. Rock. Reducing uncertainty in estimating virus reduction by advanced water treatment processes. Water Research. 133, 282-288. (DOI: 10.1016/j.watres.2018.01.044)
3. Masaaki Kitajima, Andri T. Rachmadi, Brandon Iker, Eiji Haramoto, Charles P. Gerba. 2018. Temporal variations in genotype distribution of human sapoviruses and Aichi virus 1 in wastewater in southern Arizona, United States. Journal of Applied Microbiology. 124(5), 1324-1332. (DOI:10.1111/jam.13712)
4. Eiji Haramoto*, Masaaki Kitajima, Akihiko Hata, Jason R. Torrey, Yoshifumi Masago, Daisuke Sano, Hiroyuki Katayama. 2018. A review on recent progress in the detection methods and prevalence of human enteric viruses in water. Water Research. 135, 168-186. (DOI:10.1016/j.watres.2018.02.004)
5. Mohan Amarasiri*, Masaaki Kitajima, Akiho Miyamura, Ricardo Santos, Silvia Monteiro, Takayuki Miura, Shinobu Kazama, Satoshi Okabe, Daisuke Sano. 2018. Reverse transcription-quantitative PCR assays for genotype-specific detection of human noroviruses in clinical and environmental samples. International Journal of Hygiene and Environmental Health. 221(3), 578-585. (DOI:10.1016/j.ijheh.2018.02.008)
6. Hannah P. Sassi, Koiya D. Tuttle, Walter Q. Betancourt, Masaaki Kitajima, Charles P. Gerba*. Persistence of viruses by qPCR in three effluent-dominated rivers in the western United States. Food and Environmental Virology. 10(3), 297-304. (DOI:10.1007/s12560-018-9343-7)
7. Andri Rachmadi, Masaaki Kitajima,Kozo Watanabe, Sakiko Yaegashi, Joeselle Serrana, Arata Nakamura, Toyoko Nakagomi, Osamu Nakagomi, Kazuhiko Kazuhiko Katayama, Satoshi Okabe, and Daisuke Sano*. Free chlorine disinfection as a selection pressure on norovirus. Applied and Environmental Microbiology. 84(13), e00244-18.(DOI:10.1128/AEM.00244-18)
8. Masaaki Kitajima*, So Ishizaki, Jeonghwan Jang, Satoshi Ishii, Satoshi Okabe. Complete genome sequence of Klebsiella quasipneumoniaestrain S05, a fouling-causing bacterium isolated from a membrane bioreactor. Genome Announcement. 6(23), e00471-18. (DOI:10.1128/genomeA.00471-18)
9. Nazanin Saeidi, Xiaoqiong Gu, Tran Ngoc Han, Shin Giek Goh, Masaaki Kitajima, Ariel Kushmaro, Bradley Schmitz, Karina Yew-Hoong Gin*. Occurrence of traditional and alternative fecal indicators in tropical urban environments under different land use patterns. Applied and Environmental Microbiology. 84(14), e00287-18. (DOI:10.1128/AEM.00287-18)
10. Bradley W. Schmitz*, Hitoha Moriyama, Eiji Haramoto, Masaaki Kitajima, Samendra, Sherchan, Charles P. Gerba, Ian L. Pepper. Reduction of Cryptosporidium, Giardia, and fecal indicators by Bardenpho wastewater treatment. Environmental Science & Technology. 52(12), 7015-7023. (DOI:10.1021/acs.est.7b05876)
11. Akihiko Hata*, Masaaki Kitajima, Eiji Haramoto, Suntae Lee, Masaru Ihara, Charles P. Gerba, Hiroaki Tanaka. Next-generation amplicon sequencing identifies genetically diverse human astroviruses, including recombinant strains, in environmental waters. Scientific Reports. 8(1), 11837. (DOI:10.1038/s41598-018-30217-y)
12. Masaaki Kitajima*, Hannah P. Sassi, Jason R. Torrey. Pepper mild mottle virus as a water quality indicator. npj Clean Water. 1(19), s41545-018-0019-5. (DOI: 10.1038/s41545-018-0019-5)

1. Shin Giek Goh, Nazanin Saeidi, Xiaoqiong Gu, Genevieve Gabrielle Rose Vergara, Liang Liang, Haoming Fang, Masaaki Kitajima, Ariel Kushmaro, Karina Yew-Hoong Gin. Occurrence of microbial indicators, pathogenic bacteria and viruses in tropical surface waters subject to contrasting land use. Water Research.2019, 150, 200-205. (DOI: 10.1016/j.watres.2018.11.058)
2. Jennifer G. Lamori, Jia Xue, Andri T. Rachmadi, Gerardo U. Lopez, Masaaki Kitajima, Charles P. Gerba, Ian L. Pepper, John Brooks, Samendra Sherchan*.Removal of fecal indicator bacteria and antibiotic resistant genes in constructed wetlands. Environmental Science and Pollution Research. 26(10), 10188-10197. (DOI: 10.1007/s11356-019-04468-9)
3. Mohan Amarasiri, Hiroki Kawai, Masaaki Kitajima, Satoshi Okabe, Daisuke Sano D*. Specific interactions of rotavirus HAL1166 with Enterobacter cloacaeSENG-6 and their contribution on rotavirus HAL1166 removal. Water Science & Technology. 79(2), 342-348. (DOI: 10.2166/wst.2019.050)
4. Masaaki Kitajima*, Satoshi Ishii, Tatsuma Takagi, Satoshi Okabe. 2019. Complete genome sequence of a novel Myoviridae phage SfΦ01 infecting Shigella. Microbiology Resource Announcements. 8(23), e00349-19. (DOI:10.1128/MRA.00349-19).
5. Rajani G. Shrestha, Samendra P. Sherchan, Masaaki Kitajima, Yasuhiro Tanaka, Charles P. Gerba, and Eiji Haramoto*. Reduction of Arcobacter at two conventional wastewater treatment plants in southern Arizona, USA. Pathogens. 8, 175. (DOI: 10.3390/pathogens8040175)

1. Manish Kumar, Keisuke Kuroda, Kiran Dhangar, Payal Mazumder, Christian Sonne, Jörg Rinklebe, Masaaki Kitajima. Potential emergence of antiviral-resistant pandemic viruses via environmental drug exposure of animal reservoirs. Environmental Science & Technology. (in press)
2. Aaron Bivins, Devin North, Arslan Ahmad, Warish Ahmed, Eric Alm, Frederic Been, Prosun Bhattacharya, Lubertus Bijlsma, Alexandria B. Boehm, Joe Brown, Gianluigi Buttiglieri, Vincenza Calabro, Annalaura Carducci, Sara Castiglioni, Zeynep Cetecioglu Gurol, Sudip Chakraborty, Federico Costa, Stefano Curcio, Francis L. de los Reyes III, Jeseth Delgado Vela, Kata Farkas, Xavier Fernandez-Casi, Charles Gerba, Daniel Gerrity, Rosina Girones, Raul Gonzalez, Eiji Haramoto, Angela Harris, Patricia A. Holden, Md. Tahmidul Islam, Davey L. Jones, Barbara Kasprzyk-Hordern, Masaaki Kitajima, Nadine Kotlarz, Manish Kumar, Keisuke Kuroda, Giuseppina La Rosa, Francesca Malpei, Mariana Mautus, Sandra L. McLellan, Gertjan Medema, John Scott Meschke, Jochen Mueller, Ryan J. Newton, David Nilsson, Rachel T. Noble, Alexander van Nuijs, Jordan Peccia, T. Alex Perkins, Amy J. Pickering, Joan Rose, Gloria Sanchez, Adam Smith, Lauren Stadler, Christine Stauber, Kevin Thomas, Tom van der Voorn, Krista Wigginton, Kevin Zhu, Kyle Bibby*. 2020. Wastewater-based epidemiology: Global collaborative to maximize contributions in the fight against COVID-19. Environmental Science & Technology. 54(13), 7754–7757.
3. Andri Rachmadi, Masaaki Kitajima, Kozo Watanabe, Satoshi Okabe, Daisuke Sano*.Disinfection as a selection pressure on RNA virus evolution. Environmental Science & Technology. 52(5):2434-2435.
4. Seiya Hirano, Daisuke Sano, Satoshi Okabe, Masaaki Kitajima*. 2017. Aptamer: The potential application to norovirus research, diagnosis, and therapeutics. pp. 223-242. In Jesús L. Romalde (ed.), Noroviruses: Outbreaks, Control and Prevention Strategies. Nova Science Publishers, Inc., NY. (ISBN: 978-1-53611-959-6)
5. Brandon C. Iker, Masaaki Kitajima*, Charles P. Gerba. 2016. Extraction and purification of viral nucleic acids from environmental samples. pp. 315-324. In Miodrag Micic (ed.), Sample Preparation Techniques for Soil, Plant, and Animal samples. Springer Science + Business Media New York, New York, NY. (DOI: 10.1007/978-1-4939-3185-9_22)
6. Masaaki Kitajima*, Eiji Haramoto, Charles P. Gerba. 2014. Salivirus/klassevirus: an emerging virus associated with children’s diarrhea/acute flaccid paralysis and environmental contamination. pp. 111-122. In Roxanne H. Bishop (ed.), Influenza and RNA Viruses: Emergence, Classification and Management. Nova Science Publishers, Inc., NY. (ISBN: 978-1-63321-811-6)
7. Masaaki Kitajima*, Toru Watanabe. 2013. Risk assessment of highly pathogenic avian influenza virus infections through water. pp. 1-22. In Kyle M. Taylor and Bruce O’Connor (eds.), Avian Influenza: Molecular Evolution, Outbreaks and Prevention/Control. Nova Science Publishers, Inc., NY. (ISBN: 978-1-62417-415-5)
8. Charles P. Gerba*, Masaaki Kitajima, Brandon C. Iker. 2013. Viral presence in waste water and sewage and control methods. pp. 293-315. In Nigel Cook (ed.), Viruses in food and water: Risks, surveillance and control. Woodhead Publishing Ltd., Cambridge, UK. (ISBN: 978-0-85709-430-8)
9. Koichi Matsubara*, Chanetta Phanuwan, Nguyen Thi Van Ha, Masaaki Kitajima, Eiji Haramoto, Hiroyuki Katayama, Satoshi Takizawa, Shinichiro Ohgaki. 2009. Noroviruses and faecal contamination in Saigon River and urban canals in Ho Chi Minh City, Vietnam. pp.95-102. In Satoshi Takizawa, Futoshi Kurisu, and Hiroyasu Satoh (eds.), Southeast Asian Water Environment 3. IWA Publishing, London, UK. (ISBN: 978-1-84339-276-7)