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Streptococcus agalactiae Anterior Cervical Space and Superior Mediastinum Abscess in a Liver Transplant Recipient

Infectious Microbes & Diseases 2019年第2期1卷 75-77页

作者： Derek L.L.Hung Man-Fai Leung Jade L.L.Teng herman tse Susanna K.P.Lau Patrick C.Y.Woo Department of Microbiology The University of Hong KongHong KongChina State Key Laboratory of Emerging Infectious Diseases The University of Hong KongHong KongChina Carol Yu Centre for Infection The University of Hong KongHong KongChina Public Health Laboratory Services Branch Centre for Health ProtectionHong Kong Department of HealthThe University of Hong KongHong KongChina Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases The University of Hong KongHong KongChina

Introduction Streptococcus agalactiae is most commonly associated with pregnancy-related infections,neonatal sepsis,and infections in patients with immunocompromised states,such as diabetes mellitus and malignancies.1 Although abscesses caused by *** are sometimes encountered in immunocompromised patients,*** abscess in transplant recipients is extremely *** abscesses have never been reported in liver transplant *** this article,we report a case of *** abscess in the anterior cervical space extending to the superior mediastinum in a liver transplant recipient.

关键词： Streptococcus agalactiae liver transplant abscess

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Leptotrichia hongkongensis ***.,a novel Leptotrichia species with the oral cavity as its natural reservoir

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第6期11卷 391-401页

作者： Patrick C. Y. WOO Samson S. Y. WONG Jade L. L. TENG Kit-Wah LEUNG Antonio H. Y. NGAN Dong-qing ZHAO herman tse Susanna K. P. LAU Kwok-Yung YUEN State Key Laboratory of Emerging Infectious Diseases The University of Hong Kong Hong Kong China Research Centre of Infection and Immunology The University of Hong Kong Hong Kong China Department of Microbiology The University of Hong Kong Hong Kong China Carol Yu Centre for Infection The University of Hong Kong Hong Kong China

A straight, non-sporulating, Gram-variable bacillus (HKU24T) was recovered from the blood culture of a patient with metastatic breast carcinoma. After repeated subculturing in BACTEC Plus Anaerobic/F blood culture broth, HKU24T grew on brucella agar as non-hemolytic, pinpoint colonies after 96 h of incubation at 37 °C in an anaerobic environment and aerobic environment with 5% CO2. Growth was enhanced with a streak of Staphylococcus aureus. HKU24T was non-motile and catalase-negative, but positive for alkaline phosphatase, β-glucosidase, and α-glucosidase. It hydrolyzed phenylphosphonate and reduced resazurin. 16S rRNA, groEL, gyrB, recA, and rpoB sequencing showed that HKU24T occupies a distinct phylogenetic position among the Leptotrichia species, being most closely related to Leptotrichia trevisanii. Using HKU24T groEL, gyrB, recA, and rpoB gene-specific primers, fragments of these genes were amplified from one of 20 oral specimens. Based on phenotypic and genotypic characteristics, we propose a new species, Leptotrichia hongkongensis sp. nov., to describe this bacterium.

关键词： Leptotrichia hongkongensis Bacterium Blood culture Anaerobic bacteria Novel species

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Proactive infection control measures to prevent nosocomial transmission of carbapenem-resistant Enterobacteriaceae in a non-endemic area

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Chinese Medical Journal 2013年第23期126卷 4504-4509页

作者： CHENG Vincent Chi-Chung CHAN Jasper Fuk-Woo WONG Sally Cheuk-Ying CHEN Jonathan Hon-Kwan TAI Josepha Wai-Ming YAN Mei-Kum KWAN Grace See-Wai tse herman TO Kelvin Kai-Wang HO Pak-Leung YUEN Kwok-Yung Department of Microbiology Queen Mary Hospital Hong KongChina Infection Control Team Queen Mary Hospital Hong Kong China

Background Identification of hospitalized carbapenem-resistant Enterobacteriaceae （CRE）-positive patient is important in preventing nosocomial *** objective of this study was to illustrate the implementation of proactive infection control measures in preventing nosocomial transmission of CRE in a healthcare region of over 3200 beds in Hong Kong between October 1,2010 and December 31,*** The program included active surveillance culture in patients with history of medical tourism with hospitalization and surgical operation outside Hong Kong within 12 months before admission,and ＂added test＂ as an opportunistic CRE screening in all fecal specimens submitted to the *** investigation and contact tracing were conducted for CRE-positive *** quantitative culture was performed on CRE-positive patients and the duration of fecal carriage of CRE was *** During the study period,a total of 6533 patients were screened for CRE,of which 76 patients were positive （10 from active surveillance culture,65 from ＂added test＂,and 1 secondary case from contact tracing of 223 patients with no nosocomial outbreak）,resulting in an overall rate of CRE fecal carriage of 1.2％.The median time of fecal carriage of CRE was 43 days （range,13-119 days）.Beta-lactam-beta-lactamase-inhibitors,cephalosporins,and fluoroquinolones were associated significantly with high fecal bacterial load when used 90 days before CRE detection,while use of cephalosporins,carbapenems,and fiuoroquinolones after CRE detection are significantly associated with longer duration of *** duration of fecal carriage of CRE also correlates significantly with the initial fecal bacterial load （Pearson correlation：0.53; P=0.02）.Conclusion Proactive infection control measures by enhanced surveillance program identify CRE-positive patients and data obtained are useful for the planning of and resource allocation for CRE control.

关键词： surveillance nosocomial transmission carbapenem-resistant Enterobacteriaceae

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Synthesis and characterization of MH···HOR dihydrogen bonded ruthenium and osmium complexes（η~5-C_5H_4CH_2OH）MH（PPh_3）_2（M = Ru, Os）

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Science China Chemistry 2014年第8期57卷 1079-1089页

作者： BAI Wei tse Sunny Kai San LEE Ka Ho SUNG herman Ho-Yung WILLIAMS Ian Duncan LIN ZhenYang JIA GuoChen Department of Chemistry Institute for Advanced Study The Hong Kong University of Science and Technology

Treatment of RuCl2(PPh3)3 with 6-dimethylaminopentafulvene in THF in the presence of water produced(η5-C5H4CHO) RuCl(PPh3)2, which was reduced by NaBH4 to give the Ru–H···HO dihydrogen bonded complex(η5-C5H4CH2OH) RuH(PPh3)2. The dihydrogen bonded complex(η5-C5H4CH2OH)RuH(PPh3)2 could also be synthesized by the reduction of complex(η5-C5H4CHO)RuH(PPh3)2, which was obtained by the reaction of RuHCl(PPh3)3 with 6-dimethylaminopentafulvene in the presence of water. The analogous dihydrogen bonded osmium complex(η5-C5H4CH2OH)OsH(PPh3)2 was similarly prepared. Single crystal structures and DFT calculations support the presence of intra-molecular H···H interaction, with separations of around 1.9 to 2.0 .

关键词： ruthenium osmium hydride dihydrogen bonding H/D exchange

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Substituted Cyclopentadienyl Osmium Complexes from the Reactions of OsH3Cl（PPh3）3 with Fulvenes and Cyclopentadienes

Substituted Cyclopentadienyl Osmium Complexes from the React...

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第十七届全国金属有机化学学术讨论会

作者： Sunny Kai San tse Wei Bai herman Ho-Yung Sung Ian Duncan Williams Guochen Jia Department of Chemistry The Hong Kong University of Science and Technology

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