41 results on '"Ayibieke, A."'
Search Results
2. Insights and genetic features of extended-spectrum beta-lactamase producing Escherichia coli isolates from two hospitals in Ghana
- Author
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Mahazu, Samiratu, Sato, Wakana, Ayibieke, Alafate, Prah, Isaac, Hayashi, Takaya, Suzuki, Toshihiko, Iwanaga, Shiroh, Ablordey, Anthony, and Saito, Ryoichi
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- 2022
- Full Text
- View/download PDF
3. Insights and genetic features of extended-spectrum beta-lactamase producing Escherichia coli isolates from two hospitals in Ghana
- Author
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Samiratu Mahazu, Wakana Sato, Alafate Ayibieke, Isaac Prah, Takaya Hayashi, Toshihiko Suzuki, Shiroh Iwanaga, Anthony Ablordey, and Ryoichi Saito
- Subjects
Medicine ,Science - Abstract
Abstract Recently, the emergence and rapid dissemination of extended-spectrum beta-lactamase (ESBL)-producing bacteria, particularly of the family Enterobacteriaceae, has posed serious healthcare challenges. Here, we determined the antimicrobial susceptibility and genetic characteristics of 164 Escherichia coli strains isolated from infected patients in two hospitals in Ghana. In total, 102 cefotaxime-resistant isolates (62.2%) were identified as ESBL-producers. Multilocus sequence typing of the ESBL-producers identified 20 different sequence types (STs) with ST131 (n = 25, 24.5%) as the dominant group. Other detected STs included ST410 (n = 21, 20.6%) and ST617 (n = 19, 18.6%). All identified ESBL-producers harbored bla CTX-M-14, bla CTX-M-15, or bla CTX-M-27, with bla CTX-M-15 (n = 96, 94.1%) being the most predominant ESBL allele. Further analysis showed that the immediate genetic environment around bla CTX-M-15 is conserved within bla CTX-M-15 containing strains. Five of the 25 ST131 isolates were clustered with clade A, one with sub-clade C1, and 19 with the dominant sub-clade C2. The results show that fluoroquinolone-resistant, bla CTX-M-14- and bla CTX- M-15-producing ESBL E. coli ST131 strains belonging to clade A and sub-clades C1 and C2 are disseminating in Ghanaian hospitals. To the best of our knowledge, this is the first report of the ST131 phylogeny in Ghana.
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- 2022
- Full Text
- View/download PDF
4. Emergence of oxacillinase-181 carbapenemase-producing diarrheagenic Escherichia coli in Ghana
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Isaac Prah, Alafate Ayibieke, Samiratu Mahazu, Chihiro Tani Sassa, Takaya Hayashi, Shoji Yamaoka, Toshihiko Suzuki, Shiroh Iwanaga, Anthony Ablordey, and Ryoichi Saito
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ST410 ,oxacillinase-181 ,diarrheagenic E. coli ,IncX3 ,IncFIC(FII) and B4/H24RxC clade ,Infectious and parasitic diseases ,RC109-216 ,Microbiology ,QR1-502 - Abstract
The emergence and spread of carbapenemase-producing bacteria are serious threats to public health. We characterized two OXA-181-producing Escherichia coli isolates from pediatric patients with diarrhea from Ghana. blaOXA-181 was localized on the self-conjugative IncX3-containing plasmid in the E. coli ST410 isolate, belonging to an emerging lineage, and an IncFIC(FII)-containing plasmid in E. coli ST940. The blaOXA-181-qnrS1 region was found on the IS26 composite transposon, which contained a 366-bp deletion in the region encoding the Rep A protein for the IncX3-containing plasmid. The IncFIC(FII) plasmid was novel and integrated with an approximately 39-kb IncX1 plasmid through conjugal transfer. Both plasmids clustered close to plasmids from Switzerland. To the best of our knowledge, this is the first report describing the presence of an IncX3 plasmid containing blaOXA-181 in strains closely related to the B4/H24RxC clade in Africa, suggesting its emergence and the need to strengthen antimicrobial resistance surveillance.
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- 2021
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5. A nosocomial cluster of Roseomonas mucosa bacteremia possibly linked to contaminated hospital environment
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Okamoto, Koh, Ayibieke, Alafate, Saito, Ryoichi, Ogura, Kenichi, Magara, Yuki, Ueda, Reiko, Ogawa, Hina, and Hatakeyama, Shuji
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- 2020
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6. Impact of deoxycholate on Clostridioides difficile growth, toxin production, and sporulation
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Usui, Yukino, Ayibieke, Alafate, Kamiichi, Yuko, Okugawa, Shu, Moriya, Kyoji, Tohda, Shuji, and Saito, Ryoichi
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- 2020
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7. Hypervirulent clade 2, ribotype 019/sequence type 67 Clostridioides difficile strain from Japan
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Ryoichi Saito, Yukino Usui, Alafate Ayibieke, Jun Nakajima, Isaac Prah, Kazunari Sonobe, Yoshibumi Aiso, Shiori Ito, Yasuhiro Itsui, Yoshiro Hadano, Yoko Nukui, Ryuji Koike, and Shuji Tohda
- Subjects
Clostridioides difficile ,Hypervirulent clade 2 ,Ribotype 019 ,Sequence type 67 ,Toxin A ,Toxin B ,Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
Abstract Background Clostridioides difficile ribotype (RT) 019/sequence type (ST) 67 strains belong to a hypervirulent lineage closely related to RT027/ST1; however, limited data are available for hypervirulent clade 2 lineages in Japan. Herein, we report the draft genome of a C. difficile strain B18-123 belonging to clade 2, RT019/ST67 for the first time in Japan. Results The pathogenicity locus carried by B18-123 (19.6 kb) showed higher homology (97.29% nucleotide identity) with strain R20291 (RT027/ST1) than the reference strain 630 (RT012/ST54), and B18-123 harbored 8-nucleotide substitutions in tcdC. However, it did not contain an 18-base pair (bp) deletion or a single-bp deletion at position 117 in tcdC, which was identified in the previous strain R20291. A cytotoxicity assay revealed similar cytotoxicity levels between strains B18-123 and ATCC BAA-1870 (RT027/ST1). The B18-123 strain was found to be susceptible to metronidazole and vancomycin. Conclusion Our findings contribute to the further understanding of the characteristics of hypervirulent clade 2 including RT019/ST67 lineages.
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- 2019
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8. Possible Dissemination of Escherichia coli Sequence Type 410 Closely Related to B4/H24RxC in Ghana
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Samiratu Mahazu, Isaac Prah, Alafate Ayibieke, Wakana Sato, Takaya Hayashi, Toshihiko Suzuki, Shiroh Iwanaga, Anthony Ablordey, and Ryoichi Saito
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Extra-intestinal pathogenic E. coli (ExPEC) ,ST410 ,B3/H24Rx ,B4H24RxC ,Oxacillinase-181 (OXA-181) ,Microbiology ,QR1-502 - Abstract
Extra-intestinal pathogenic Escherichia coli (ExPEC) is one of the world’s leading causes of bloodstream infections with high mortality. Sequence type 410 (ST410) is an emerging ExPEC clone resistant to a wide range of antibiotics. In this study, we investigated the epidemiology of 21 ST410 E. coli isolates from two Ghanaian hospitals. We also investigated the isolates within a global context to provide further insight into the dissemination of this highly pathogenic clone. A phylogenetic tree of the 21 isolate genomes, along with 102 others from global collection, was constructed representing the ensuing clades and sub-clades of the ST: A/H53, B2/H24R, B3/H24Rx, and B4/H24RxC. The carbapenem-resistant sub-clade B4/H24RxC is reported to have emerged in the early 2000s when ST410 acquired an IncX3 plasmid carrying a blaOXA–181 carbapenemase gene, and a second carbapenemase gene, blaNDM–5, on a conserved IncFII plasmid in 2014. We identified, in this study, one blaOXA–181–carrying isolate belonging to B4/H24RxC sub-lineage and one carrying blaNDM–1 belonging to sub-lineage B3/H24Rx. The blaOXA–181 gene was found on a 51kb IncX3 plasmid; pEc1079_3. The majority (12/21) of our Ghanaian isolates were clustered with international strains described by previous authors as closely related strains to B4/H24RxC. Six others were clustered among the ESBL-associated sub-lineage B3/H24Rx and three with the globally disseminated sub-lineage B4/H24RxC. The results show that this highly pathogenic clone is disseminated in Ghana and, given its ability to transmit between hosts, it poses a serious threat and should be monitored closely.
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- 2021
- Full Text
- View/download PDF
9. Prevalence and Characterization of Carbapenem-Hydrolyzing Class D β-Lactamase-Producing Acinetobacter Isolates From Ghana
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Alafate Ayibieke, Ayumi Kobayashi, Masato Suzuki, Wakana Sato, Samiratu Mahazu, Isaac Prah, Miyuki Mizoguchi, Kyoji Moriya, Takaya Hayashi, Toshihiko Suzuki, Shiroh Iwanaga, Anthony Ablordey, and Ryoichi Saito
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carbapenem-hydrolyzing class D β-lactamases ,carbapenem-resistant Acinetobacter ,multilocus sequence typing ,whole-genome sequencing ,Acinetobacter baumannii ,OXA-type beta-lactamase ,Microbiology ,QR1-502 - Abstract
Multidrug resistance, especially carbapenem resistance in Acinetobacter bacteria is a global healthcare concern. However, available data on the phenotypic and genotypic characteristics of Acinetobacter isolates from West Africa, including Ghana is scanty. Our aim was to investigate the antibiotic resistance profile and genotypic characteristics of Acinetobacter isolates from Ghana and to characterize carbapenemase producers using whole-genome sequencing (WGS). A total of 36 Acinetobacter isolates collected at three hospitals in Ghana between 2016 and 2017 were analyzed. MICs were determined by commercial antibiotic plates. Acinetobacter baumannii MLST was determined using the Pasteur scheme. WGS of OXA-carbapenemase producers was performed using short- and long-read sequencing strategies. The resistance rate was highest for trimethoprim/sulfamethoxazole (n = 22; 61%). Six (16.7%) and eight (22.2%) isolates were resistant to ceftazidime and colistin, respectively. Two (5.6%) isolates were resistant and one (2.8%) isolate had intermediate sensitivity to three carbapenems. Fifteen STs were identified in 24 A. baumannii isolates including six new STs (ST1467 ∼ ST1472). ST78 was the predominant (n = 6) followed by ST1469 (n = 3). Four carbapenemase-producing A. baumannii isolates also were identified. Isogenic ST103 isolates Ab-B004d-c and Ab-D10a-a harbored blaOXA–23 within Tn2007 on identical plasmids, pAb-B004d-c_3, and pAb-D10a-a_3. ST1472 isolate Ab-C102 and ST107 isolate Ab-C63 carried blaOXA–58 and blaOXA–420, a rare blaOXA–58 variant, respectively, within novel genetic contexts. Our results show that A. baumannii isolates of diverse and unique genotypes, including OXA-carbapenemase producers, are circulating in Ghana highlighting the need for a wider surveillance of antimicrobial resistance.
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- 2020
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10. Impact of deoxycholate on Clostridioides difficile growth, toxin production, and sporulation
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Yukino Usui, Alafate Ayibieke, Yuko Kamiichi, Shu Okugawa, Kyoji Moriya, Shuji Tohda, and Ryoichi Saito
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Microbiology ,Hepatobiliary system ,Infectious disease ,Medical microbiology ,Microbiology epidemiology ,Bacteriology ,Science (General) ,Q1-390 ,Social sciences (General) ,H1-99 - Abstract
Purpose: Bile acids play an important role in Clostridioides difficile life cycle. Deoxycholate (DCA), one of the most abundant secondary bile acids, is known to inhibit vegetative growth and toxin production. However, limited data are available on the role of DCA on C. difficile sporulation. Here, we investigated the phenotypic and genotypic impact of DCA on the growth, toxin production, and sporulation of C. difficile. Methodology: Four genetically divergent C. difficile strains were cultured in nutrient-rich broth with and without DCA at various concentrations, and growth activity was evaluated for each strain. Cytotoxicity assays using culture supernatants from cells grown in nutrient-rich broth with and without 0.01% DCA were conducted. Sporulation efficiency was determined using sporulation media with and without 0.01% DCA. Transcript levels of tcdB and spo0A were analyzed using quantitative reverse-transcription polymerase chain reaction. Results: We found that DCA led to growth reduction in a dose-depended manner and regulated toxin production by repressing tcdB expression during vegetative growth. To our knowledge, we have also provided the first evidence that DCA reduces C. difficile sporulation efficiency through the downregulation of spo0A expression during the sporulation stage. Conclusions: DCA modulates C. difficile sporulation, vegetative growth, and toxin production.
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- 2020
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11. Gene expression analysis during the conversion from a viable but nonculturable to culturable state in Vibrio cholerae
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Ayibieke, Alafate, primary, Nishiyama, Ayae, additional, Senoh, Mitsutoshi, additional, and Hamabata, Takashi, additional
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- 2023
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12. Hypervirulent clade 2, ribotype 019/sequence type 67 Clostridioides difficile strain from Japan
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Saito, Ryoichi, Usui, Yukino, Ayibieke, Alafate, Nakajima, Jun, Prah, Isaac, Sonobe, Kazunari, Aiso, Yoshibumi, Ito, Shiori, Itsui, Yasuhiro, Hadano, Yoshiro, Nukui, Yoko, Koike, Ryuji, and Tohda, Shuji
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- 2019
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13. Molecular characterisation of the NDM-1-encoding plasmid p2189-NDM in an Escherichia coli ST410 clinical isolate from Ghana.
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Alafate Ayibieke, Wakana Sato, Samiratu Mahazu, Isaac Prah, John Addow-Thompson, Mitsuko Ohashi, Toshihiko Suzuki, Shiroh Iwanaga, Anthony Ablordey, and Ryoichi Saito
- Subjects
Medicine ,Science - Abstract
Global dissemination of New Delhi metallo-β-lactamase (NDM)-producing bacteria has become a major health threat. However, there are few reports regarding the identification and characterisation of NDM-producing bacteria from West Africa, including Ghana. An Escherichia coli strain with resistance to meropenem was isolated from the Tamale Teaching Hospital in Ghana. Its identification and determination of antibiotic susceptibility profile were carried out using commercial systems. The antibiotic resistance mechanism was analysed by phenotypic detection kits, PCR, and DNA sequencing. Conjugation experiments, S1 nuclease pulsed field gel electrophoresis, and Southern blotting were performed. Finally, the NDM-1-harbouring plasmid was characterised using next-generation sequencing and phylogenetic analysis. The meropenem-resistant Escherichia coli strain EC2189 harboured blaNDM-1 and belonged to sequence type 410. blaNDM-1 was located on the IncHI type transferrable plasmid p2189-NDM (248,807 bp long), which co-carried multiple resistance genes, such as blaCTX-M-15, aadA1, aac(6')-Ib, sul3, dfrA12, and cmlA1. p2189-NDM phylogenetically differed from previously identified blaNDM-1-positive IncHI type plasmids. A truncated Tn125 containing blaNDM-1 was bracketed by an ISSm-1-like insertion sequence upstream and by a site-specific integrase downstream. To the best of our knowledge, we have, for the first time identified and molecularly characterised an NDM-1-producing Enterobacteriaceae strain in Ghana with blaNDM-1 that had a novel genetic structure. Our findings indicate a possibility of NDM-1 dissemination in Ghana and underscore the need for constant monitoring of carbapenemase-producing bacteria.
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- 2018
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14. Gene expression analysis during the conversion from a viable but nonculturable to culturable state in Vibrio cholerae
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Alafate Ayibieke, Ayae Nishiyama, Mitsutoshi Senoh, and Takashi Hamabata
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Genetics ,General Medicine - Published
- 2023
15. Virulence Profiles of Diarrheagenic Escherichia coli Isolated from the Western Region of Ghana
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Shoji Yamaoka, Wakana Sato, Isaac Prah, Ryoichi Saito, Samiratu Mahazu, Alafate Ayibieke, Anthony Ablordey, Shiroh Iwanaga, Thi Thu Huong Nguyen, Atsushi Iguchi, Toshihiko Suzuki, and Takaya Hayashi
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0301 basic medicine ,Microbiology (medical) ,Serotype ,030106 microbiology ,Outbreak ,Virulence ,General Medicine ,Biology ,Microbiology ,03 medical and health sciences ,Diarrhea ,0302 clinical medicine ,Infectious Diseases ,Antigen ,parasitic diseases ,Genotype ,medicine ,Colonization ,030212 general & internal medicine ,medicine.symptom ,Gene - Abstract
Diarrheagenic Escherichia coli (DEC), an important agent of infectious diarrhea, is constantly evolving, making its periodic monitoring necessary. However, the DEC genotypes in Ghana remain uncharacterized. We focused on characterizing the molecular serotypes, virulence factors, multilocus sequence types, and the phylogenetic relatedness among different DEC pathotypes recovered from stool samples of pediatric patients with symptoms of diarrhea from the Western region of Ghana. We detected all five common DEC pathotypes, with the majority of the isolates being enterotoxigenic E. coli (ETEC) harboring the heat-labile enterotoxin gene. The DEC strains exhibited diverse serotypic identity with novel and previously reported outbreak strains. Sequence types (ST) ST38, ST316, and ST1722 were most prevalent, and clonal complex 10 (CC10) was the most common CC. A close evolutionary distance was observed among most of the isolates. Coli surface antigen 6 was the most prevalent (44%, n = 11) ETEC-specific colonization factor. Nearly all the isolates harbored lpfA, and the frequencies of other virulence genes such as pap and cnf1 were 7.9% and 18.4%, respectively. This study provides insights into the important and novel genotypes circulating in the Western region of Ghana that should be monitored for public health.
- Published
- 2021
16. Emergence of oxacillinase-181 carbapenemase-producing diarrheagenic Escherichia coli in Ghana
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Toshihiko Suzuki, Takaya Hayashi, Samiratu Mahazu, Ryoichi Saito, Alafate Ayibieke, Anthony Ablordey, Isaac Prah, Shiroh Iwanaga, Shoji Yamaoka, and Chihiro Tani Sassa
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0301 basic medicine ,Epidemiology ,Diarrheagenic Escherichia coli ,030106 microbiology ,Immunology ,General Medicine ,Carbapenemase producing ,Biology ,medicine.disease_cause ,biology.organism_classification ,Microbiology ,03 medical and health sciences ,030104 developmental biology ,Infectious Diseases ,Virology ,Drug Discovery ,medicine ,bacteria ,Parasitology ,Escherichia coli ,Bacteria - Abstract
The emergence and spread of carbapenemase-producing bacteria are serious threats to public health. We characterized two OXA-181-producing Escherichia coli isolates from pediatric patients with diar...
- Published
- 2021
17. Possible Dissemination of Escherichia coli Sequence Type 410 Closely Related to B4/H24RxC in Ghana
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Mahazu, Samiratu, primary, Prah, Isaac, additional, Ayibieke, Alafate, additional, Sato, Wakana, additional, Hayashi, Takaya, additional, Suzuki, Toshihiko, additional, Iwanaga, Shiroh, additional, Ablordey, Anthony, additional, and Saito, Ryoichi, additional
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- 2021
- Full Text
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18. Possible Dissemination of
- Author
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Samiratu, Mahazu, Isaac, Prah, Alafate, Ayibieke, Wakana, Sato, Takaya, Hayashi, Toshihiko, Suzuki, Shiroh, Iwanaga, Anthony, Ablordey, and Ryoichi, Saito
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Extra-intestinal pathogenic E. coli (ExPEC) ,B3/H24Rx ,B4H24RxC ,Oxacillinase-181 (OXA-181) ,Microbiology ,Original Research ,ST410 - Abstract
Extra-intestinal pathogenic Escherichia coli (ExPEC) is one of the world’s leading causes of bloodstream infections with high mortality. Sequence type 410 (ST410) is an emerging ExPEC clone resistant to a wide range of antibiotics. In this study, we investigated the epidemiology of 21 ST410 E. coli isolates from two Ghanaian hospitals. We also investigated the isolates within a global context to provide further insight into the dissemination of this highly pathogenic clone. A phylogenetic tree of the 21 isolate genomes, along with 102 others from global collection, was constructed representing the ensuing clades and sub-clades of the ST: A/H53, B2/H24R, B3/H24Rx, and B4/H24RxC. The carbapenem-resistant sub-clade B4/H24RxC is reported to have emerged in the early 2000s when ST410 acquired an IncX3 plasmid carrying a blaOXA–181 carbapenemase gene, and a second carbapenemase gene, blaNDM–5, on a conserved IncFII plasmid in 2014. We identified, in this study, one blaOXA–181–carrying isolate belonging to B4/H24RxC sub-lineage and one carrying blaNDM–1 belonging to sub-lineage B3/H24Rx. The blaOXA–181 gene was found on a 51kb IncX3 plasmid; pEc1079_3. The majority (12/21) of our Ghanaian isolates were clustered with international strains described by previous authors as closely related strains to B4/H24RxC. Six others were clustered among the ESBL-associated sub-lineage B3/H24Rx and three with the globally disseminated sub-lineage B4/H24RxC. The results show that this highly pathogenic clone is disseminated in Ghana and, given its ability to transmit between hosts, it poses a serious threat and should be monitored closely.
- Published
- 2021
19. Fistula between the right pulmonary artery and the left atrium coexisting with a secundum-type atrial septal defect: An unusual case of cyanosis in a girl
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Jun Liu, Zonggang Zhang, Naibi Ayibieke, Aizezi Maimaitiaili, Tangsakar Ermek, Hai-Xu Zhu, Shi-Guo Li, and Wei-Min Zhang
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medicine.medical_specialty ,Heart disease ,business.industry ,Fistula ,media_common.quotation_subject ,Left atrium ,Septum secundum ,030204 cardiovascular system & hematology ,medicine.disease ,Right pulmonary artery ,Surgery ,Shunt (medical) ,03 medical and health sciences ,0302 clinical medicine ,medicine.anatomical_structure ,030228 respiratory system ,medicine.artery ,Pulmonary artery ,medicine ,Radiology, Nuclear Medicine and imaging ,Girl ,Cardiology and Cardiovascular Medicine ,business ,media_common - Abstract
A fistula between the pulmonary artery (PA) and the left atrium (LA) is a rare congenital heart disease that usually presents with cyanosis, clubbing, and dyspnea, as well as the signs and symptoms of a right-to-left shunt. Herein, we report a 16-year-old girl with a fistula between the right PA and the LA. This type of fistula could lead to systemic desaturation. This patient also had an atrial septal defect of the secundum type and has been followed up without treatment. The clinical manifestations and treatment of fistulas located between the PA and LA are also reviewed in this report.
- Published
- 2019
20. Insights and genetic features of extended-spectrum beta-lactamase producing Escherichia coli isolates from two hospitals in Ghana
- Author
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Samiratu Mahazu, Wakana Sato, Alafate Ayibieke, Isaac Prah, Takaya Hayashi, Toshihiko Suzuki, Shiroh Iwanaga, Anthony Ablordey, and Ryoichi Saito
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Multidisciplinary ,Genotype ,Science ,Escherichia coli Proteins ,Bacteriology ,Microbial Sensitivity Tests ,biochemical phenomena, metabolism, and nutrition ,bacterial infections and mycoses ,Antimicrobial resistance ,Ghana ,beta-Lactamases ,Article ,Anti-Bacterial Agents ,Phenotype ,Drug Resistance, Bacterial ,polycyclic compounds ,Escherichia coli ,Medicine ,Humans ,Microbial genetics ,Escherichia coli Infections ,Phylogeny - Abstract
Recently, the emergence and rapid dissemination of extended-spectrum beta-lactamase (ESBL)-producing bacteria, particularly of the family Enterobacteriaceae, has posed serious healthcare challenges. Here, we determined the antimicrobial susceptibility and genetic characteristics of 164 Escherichia coli strains isolated from infected patients in two hospitals in Ghana. In total, 102 cefotaxime-resistant isolates (62.2%) were identified as ESBL-producers. Multilocus sequence typing of the ESBL-producers identified 20 different sequence types (STs) with ST131 (n = 25, 24.5%) as the dominant group. Other detected STs included ST410 (n = 21, 20.6%) and ST617 (n = 19, 18.6%). All identified ESBL-producers harbored blaCTX-M-14, blaCTX-M-15, or blaCTX-M-27, with blaCTX-M-15 (n = 96, 94.1%) being the most predominant ESBL allele. Further analysis showed that the immediate genetic environment around blaCTX-M-15 is conserved within blaCTX-M-15 containing strains. Five of the 25 ST131 isolates were clustered with clade A, one with sub-clade C1, and 19 with the dominant sub-clade C2. The results show that fluoroquinolone-resistant, blaCTX-M-14- and blaCTX- M-15-producing ESBL E. coli ST131 strains belonging to clade A and sub-clades C1 and C2 are disseminating in Ghanaian hospitals. To the best of our knowledge, this is the first report of the ST131 phylogeny in Ghana.
- Published
- 2021
21. Virulence Profiles of Diarrheagenic Escherichia coli Isolated from the Western Region of Ghana
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Prah, Isaac, primary, Ayibieke, Alafate, additional, Nguyen, Thi Thu Huong, additional, Iguchi, Atsushi, additional, Mahazu, Samiratu, additional, Sato, Wakana, additional, Hayashi, Takaya, additional, Yamaoka, Shoji, additional, Suzuki, Toshihiko, additional, Iwanaga, Shiroh, additional, Ablordey, Anthony, additional, and Saito, Ryoichi, additional
- Published
- 2021
- Full Text
- View/download PDF
22. Virulence Profiles of Diarrheagenic Escherichia coli Isolated from the Western Region of Ghana
- Author
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Isaac, Prah, Alafate, Ayibieke, Thi Thu Huong, Nguyen, Atsushi, Iguchi, Samiratu, Mahazu, Wakana, Sato, Takaya, Hayashi, Shoji, Yamaoka, Toshihiko, Suzuki, Shiroh, Iwanaga, Anthony, Ablordey, and Ryoichi, Saito
- Subjects
DNA, Bacterial ,Diarrhea ,Genotype ,Virulence ,Virulence Factors ,Infant ,Ghana ,Enteropathogenic Escherichia coli ,Enterotoxins ,Genes, Bacterial ,Child, Preschool ,Escherichia coli ,Enterotoxigenic Escherichia coli ,Humans ,Escherichia coli Infections ,Phylogeny ,Multilocus Sequence Typing - Abstract
Diarrheagenic Escherichia coli (DEC), an important agent of infectious diarrhea, is constantly evolving, making its periodic monitoring necessary. However, the DEC genotypes in Ghana remain uncharacterized. We focused on characterizing the molecular serotypes, virulence factors, multilocus sequence types, and the phylogenetic relatedness among different DEC pathotypes recovered from stool samples of pediatric patients with symptoms of diarrhea from the Western region of Ghana. We detected all five common DEC pathotypes, with the majority of the isolates being enterotoxigenic E. coli (ETEC) harboring the heat-labile enterotoxin gene. The DEC strains exhibited diverse serotypic identity with novel and previously reported outbreak strains. Sequence types (ST) ST38, ST316, and ST1722 were most prevalent, and clonal complex 10 (CC10) was the most common CC. A close evolutionary distance was observed among most of the isolates. Coli surface antigen 6 was the most prevalent (44%, n = 11) ETEC-specific colonization factor. Nearly all the isolates harbored lpfA, and the frequencies of other virulence genes such as pap and cnf1 were 7.9% and 18.4%, respectively. This study provides insights into the important and novel genotypes circulating in the Western region of Ghana that should be monitored for public health.
- Published
- 2020
23. A nosocomial cluster of Roseomonas mucosa bacteremia possibly linked to contaminated hospital environment
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Ryoichi Saito, Alafate Ayibieke, Yuki Magara, Kenichi Ogura, Shuji Hatakeyama, Hina Ogawa, Reiko Ueda, and Koh Okamoto
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0301 basic medicine ,Microbiology (medical) ,DNA, Bacterial ,Epidemiology ,030106 microbiology ,Clone (cell biology) ,Bacteremia ,Biology ,Disease cluster ,Microbiology ,03 medical and health sciences ,0302 clinical medicine ,Fatal Outcome ,RNA, Ribosomal, 16S ,Roseomonas mucosa ,Waterborne Diseases ,medicine ,Pulsed-field gel electrophoresis ,Water environment ,Humans ,Pharmacology (medical) ,030212 general & internal medicine ,Aged ,Aged, 80 and over ,Cross Infection ,business.industry ,Sequence Analysis, RNA ,Contamination ,medicine.disease ,biology.organism_classification ,Hospitals ,Roseomonas ,Anti-Bacterial Agents ,Electrophoresis, Gel, Pulsed-Field ,Infectious Diseases ,Treatment Outcome ,Female ,business ,Gram-Negative Bacterial Infections ,Methylobacteriaceae ,Bacteria - Abstract
Background: The genus Roseomonas, containing pink-pigmented glucose nonfermentative bacteria, has been associated with various primary and nosocomial human infections; however, to our knowledge, its nosocomial transmission has never been reported in the literature. Here, we report a nosocomial cluster of Roseomonas mucosa bacteremia. Methods: Two cases of R. mucosa bacteremia in 2018 are described. Clinical and epidemiological investigations were undertaken. Environmental surfaces prone to water contamination in the patient wards were sampled and cultured. The sampled surfaces included sinks, faucets, toilets, sewage, showerheads, refrigerators, exhaust vents, and washing machines. The 2 clinical isolates and all environmental isolates that showed growth of pink colonies were identified using matrix-assisted laser desorption/ionization time of flight mass spectrometry and 16S rRNA gene sequencing. Pulse-field gel electrophoresis (PFGE) was performed and fingerprinting software was used to analyze the DNA restriction patterns and determine their similarity. Results: Two patients who developed R. mucosa bacteremia had received care from the same treatment team. The patients were on different wards but had overlapping hospital stays. In addition to the treatment team, no other shared exposure was identified. Moreover, 126 environmental surfaces were sampled, of which 7 samples grew pink colonies. The 9 isolates from the patients and the environmental samples were examined using 16S rRNA gene sequencing. Overall, 7 isolates, including isolates from both patients, were identified as R. mucosa, and the other 2 isolates were identified as Roseomonas gilardii subsp. rosea (Fig. 1). With 80% similarity as a cutoff, PFGE analysis revealed that the R. mucosa isolates from 2 patients’ blood cultures and 3 environmental isolates (a washing machine in the ward, a sink in the shared washroom, and a sink in the patient room) belonged to the same clone (Fig. 2). Conclusions: The hospital water environment was contaminated with R. mucosa, and the same clone caused bacteremia in 2 separate patients, suggesting nosocomial transmission of R. mucosa possibly linked to contaminated water, environment, and/or patient care.Funding: NoneDisclosures: None
- Published
- 2020
24. Hypervirulent clade 2, ribotype 019/sequence type 67 Clostridioides difficile strain from Japan
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Ryuji Koike, Shiori Ito, Shuji Tohda, Jun Nakajima, Yasuhiro Itsui, Yoshibumi Aiso, Isaac Prah, Yukino Usui, Ryoichi Saito, Alafate Ayibieke, Kazunari Sonobe, Yoko Nukui, and Yoshiro Hadano
- Subjects
0301 basic medicine ,Pathogenicity locus ,030106 microbiology ,Short Report ,Clostridium difficile toxin A ,Toxin B ,Clostridium difficile toxin B ,Locus (genetics) ,Toxin A ,Biology ,Microbiology ,Genome ,Cdt locus ,Homology (biology) ,03 medical and health sciences ,Virology ,medicine ,lcsh:RC799-869 ,Clade ,Genetics ,Clostridioides difficile ,Gastroenterology ,Hypervirulent clade 2 ,stomatognathic diseases ,030104 developmental biology ,Infectious Diseases ,Parasitology ,Sequence type 67 ,Vancomycin ,Ribotype 019 ,lcsh:Diseases of the digestive system. Gastroenterology ,medicine.drug ,Binary toxin - Abstract
Background Clostridioides difficile ribotype (RT) 019/sequence type (ST) 67 strains belong to a hypervirulent lineage closely related to RT027/ST1; however, limited data are available for hypervirulent clade 2 lineages in Japan. Herein, we report the draft genome of a C. difficile strain B18-123 belonging to clade 2, RT019/ST67 for the first time in Japan. Results The pathogenicity locus carried by B18-123 (19.6 kb) showed higher homology (97.29% nucleotide identity) with strain R20291 (RT027/ST1) than the reference strain 630 (RT012/ST54), and B18-123 harbored 8-nucleotide substitutions in tcdC. However, it did not contain an 18-base pair (bp) deletion or a single-bp deletion at position 117 in tcdC, which was identified in the previous strain R20291. A cytotoxicity assay revealed similar cytotoxicity levels between strains B18-123 and ATCC BAA-1870 (RT027/ST1). The B18-123 strain was found to be susceptible to metronidazole and vancomycin. Conclusion Our findings contribute to the further understanding of the characteristics of hypervirulent clade 2 including RT019/ST67 lineages.
- Published
- 2019
25. Whole-genome analysis of EC129, an NDM-5-, CTX-M-14-, OXA-10- and MCR-1-co-producing Escherichia coli ST167 strain isolated from Japan
- Author
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Shuji Tohda, Yoko Nukui, Saki Kanehira, Ryuji Koike, Yuka Shibuya, Yoshibumi Aiso, Makoto Taniguchi, Ryoichi Saito, Alafate Ayibieke, Yoshiro Hadano, Kazunari Sonobe, and Jun Nakajima
- Subjects
0301 basic medicine ,Microbiology (medical) ,030106 microbiology ,Immunology ,Microbial Sensitivity Tests ,medicine.disease_cause ,Microbiology ,Genome ,beta-Lactamases ,03 medical and health sciences ,0302 clinical medicine ,Japan ,Drug Resistance, Multiple, Bacterial ,Escherichia coli ,medicine ,Immunology and Allergy ,030212 general & internal medicine ,Gene ,Whole genome sequencing ,Whole Genome Sequencing ,biology ,Escherichia coli Proteins ,Antimicrobial ,biology.organism_classification ,Enterobacteriaceae ,Anti-Bacterial Agents ,Carbapenem-Resistant Enterobacteriaceae ,Genes, Bacterial ,Colistin ,MCR-1 ,Genome, Bacterial ,medicine.drug - Abstract
Objectives The emergence and spread of carbapenemase-producing Enterobacteriaceae is a worldwide concern. This study reports the whole genome sequence of an NDM-5-, CTX-M-14-, OXA-10- and MCR-1-co-producing Escherichia coli sequence type 167 (ST167) multidrug-resistant clinical strain (EC129) isolated from a sputum sample of a hospitalised patient diagnosed with pneumonia. Methods The genome of E. coli EC129 was subjected to next-generation sequencing and reads were assembled. The draft genome was annotated using DDBJ Read Annotation Pipeline DFAST server, followed by subsequent in silico analysis. Results The genome of E. coli ST167 strain EC129 is 5 319 159 bp in length and contains 5022 protein-coding sequences. The blaNDM-5, blaCTX-M-14, blaOXA-10 and mcr-1 genes were detected along with other antimicrobial resistance genes conferring resistance to aminoglycosides, fluoroquinolones, sulfonamides, trimethoprim and tetracyclines. Antimicrobial susceptibility testing revealed that the isolate was resistant to all antimicrobial agents except colistin. Conclusion To our knowledge, this study is the first to report anE. coli ST167 strain co-producing NDM-5, CTX-M-14, OXA-10 and MCR-1 isolated from a sputum sample of an individual with pneumonia in Japan, thus elucidating the molecular characteristics and resistance gene diversity of this strain.
- Published
- 2019
26. Emergence of oxacillinase-181 carbapenemase-producing diarrheagenic Escherichia coli in Ghana
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Prah, Isaac, primary, Ayibieke, Alafate, additional, Mahazu, Samiratu, additional, Sassa, Chihiro Tani, additional, Hayashi, Takaya, additional, Yamaoka, Shoji, additional, Suzuki, Toshihiko, additional, Iwanaga, Shiroh, additional, Ablordey, Anthony, additional, and Saito, Ryoichi, additional
- Published
- 2021
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27. Prevalence and Characterization of Carbapenem-Hydrolyzing Class D β-Lactamase-Producing Acinetobacter Isolates From Ghana
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Ayibieke, Alafate, primary, Kobayashi, Ayumi, additional, Suzuki, Masato, additional, Sato, Wakana, additional, Mahazu, Samiratu, additional, Prah, Isaac, additional, Mizoguchi, Miyuki, additional, Moriya, Kyoji, additional, Hayashi, Takaya, additional, Suzuki, Toshihiko, additional, Iwanaga, Shiroh, additional, Ablordey, Anthony, additional, and Saito, Ryoichi, additional
- Published
- 2020
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28. Whole-genome analysis of EC129, an NDM-5-, CTX-M-14-, OXA-10- and MCR-1-co-producing Escherichia coli ST167 strain isolated from Japan
- Author
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Nukui, Yoko, Ayibieke, Alafate, Taniguchi, Makoto, Aiso, Yoshibumi, Shibuya, Yuka, Sonobe, Kazunari, Nakajima, Jun, Kanehira, Saki, Hadano, Yoshiro, Tohda, Shuji, Koike, Ryuji, and Saito, Ryoichi
- Published
- 2019
- Full Text
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29. A Nosocomial Cluster of Roseomonas mucosa Bacteremia Possibly Linked to Contaminated Hospital Environment
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Okamoto, Koh, primary, Ayibieke, Alafate, additional, Saito, Ryoichi, additional, Magara, Yuki, additional, Ogura, Kenichi, additional, Ueda, Reiko, additional, Ogawa, Hina, additional, and Hatakeyama, Shuji, additional
- Published
- 2020
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30. Possible Dissemination of Escherichia co li Sequence Type 410 Closely Related to B4/H24RxC in Ghana.
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Mahazu, Samiratu, Prah, Isaac, Ayibieke, Alafate, Sato, Wakana, Hayashi, Takaya, Suzuki, Toshihiko, Iwanaga, Shiroh, Ablordey, Anthony, and Saito, Ryoichi
- Subjects
ESCHERICHIA ,CARBAPENEMASE ,ESCHERICHIA coli ,TWO thousands (Decade) ,KLEBSIELLA pneumoniae ,GENOMES ,ENTEROBACTERIACEAE - Abstract
Extra-intestinal pathogenic Escherichia coli (ExPEC) is one of the world's leading causes of bloodstream infections with high mortality. Sequence type 410 (ST410) is an emerging ExPEC clone resistant to a wide range of antibiotics. In this study, we investigated the epidemiology of 21 ST410 E. coli isolates from two Ghanaian hospitals. We also investigated the isolates within a global context to provide further insight into the dissemination of this highly pathogenic clone. A phylogenetic tree of the 21 isolate genomes, along with 102 others from global collection, was constructed representing the ensuing clades and sub-clades of the ST: A/H53, B2/H24R, B3/H24Rx, and B4/H24RxC. The carbapenem-resistant sub-clade B4/H24RxC is reported to have emerged in the early 2000s when ST410 acquired an IncX3 plasmid carrying a bla
OXA– 181 carbapenemase gene, and a second carbapenemase gene, blaNDM– 5 , on a conserved IncFII plasmid in 2014. We identified, in this study, one blaOXA– 181 –carrying isolate belonging to B4/H24RxC sub-lineage and one carrying blaNDM– 1 belonging to sub-lineage B3/H24Rx. The blaOXA– 181 gene was found on a 51kb IncX3 plasmid; pEc1079_3. The majority (12/21) of our Ghanaian isolates were clustered with international strains described by previous authors as closely related strains to B4/H24RxC. Six others were clustered among the ESBL-associated sub-lineage B3/H24Rx and three with the globally disseminated sub-lineage B4/H24RxC. The results show that this highly pathogenic clone is disseminated in Ghana and, given its ability to transmit between hosts, it poses a serious threat and should be monitored closely. [ABSTRACT FROM AUTHOR]- Published
- 2021
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31. Molecular characterisation of the NDM-1-encoding plasmid p2189-NDM in an Escherichia coli ST410 clinical isolate from Ghana
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John Addow-Thompson, Anthony Ablordey, Toshihiko Suzuki, Wakana Sato, Isaac Prah, Samiratu Mahazu, Mitsuko Ohashi, Ryoichi Saito, Alafate Ayibieke, and Shiroh Iwanaga
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0301 basic medicine ,medicine.disease_cause ,Ghana ,Biochemistry ,Geographical Locations ,Database and Informatics Methods ,Plasmid ,Japan ,Antibiotics ,Mobile Genetic Elements ,Drug Resistance, Multiple, Bacterial ,Medicine and Health Sciences ,Insertion sequence ,Phylogeny ,Data Management ,Genetics ,Multidisciplinary ,Antimicrobials ,Enterobacteriaceae Infections ,Drugs ,Phylogenetic Analysis ,Genomics ,Enterobacteriaceae ,Anti-Bacterial Agents ,Nucleic acids ,Phylogenetics ,Medicine ,Sequence Analysis ,Research Article ,Plasmids ,Computer and Information Sciences ,Asia ,Forms of DNA ,Bioinformatics ,Science ,030106 microbiology ,Sequence Databases ,Microbial Sensitivity Tests ,Biology ,Research and Analysis Methods ,Microbiology ,beta-Lactamases ,03 medical and health sciences ,Antibiotic resistance ,Genetic Elements ,Microbial Control ,medicine ,Pulsed-field gel electrophoresis ,Escherichia coli ,Humans ,Evolutionary Systematics ,Taxonomy ,Pharmacology ,Evolutionary Biology ,Bacteria ,Organisms ,Biology and Life Sciences ,DNA ,biology.organism_classification ,Biological Databases ,Antibiotic Resistance ,People and Places ,Africa ,Multilocus sequence typing ,Antimicrobial Resistance ,Multilocus Sequence Typing - Abstract
Global dissemination of New Delhi metallo-β-lactamase (NDM)-producing bacteria has become a major health threat. However, there are few reports regarding the identification and characterisation of NDM-producing bacteria from West Africa, including Ghana. An Escherichia coli strain with resistance to meropenem was isolated from the Tamale Teaching Hospital in Ghana. Its identification and determination of antibiotic susceptibility profile were carried out using commercial systems. The antibiotic resistance mechanism was analysed by phenotypic detection kits, PCR, and DNA sequencing. Conjugation experiments, S1 nuclease pulsed field gel electrophoresis, and Southern blotting were performed. Finally, the NDM-1-harbouring plasmid was characterised using next-generation sequencing and phylogenetic analysis. The meropenem-resistant Escherichia coli strain EC2189 harboured blaNDM-1 and belonged to sequence type 410. blaNDM-1 was located on the IncHI type transferrable plasmid p2189-NDM (248,807 bp long), which co-carried multiple resistance genes, such as blaCTX-M-15, aadA1, aac(6')-Ib, sul3, dfrA12, and cmlA1. p2189-NDM phylogenetically differed from previously identified blaNDM-1-positive IncHI type plasmids. A truncated Tn125 containing blaNDM-1 was bracketed by an ISSm-1-like insertion sequence upstream and by a site-specific integrase downstream. To the best of our knowledge, we have, for the first time identified and molecularly characterised an NDM-1-producing Enterobacteriaceae strain in Ghana with blaNDM-1 that had a novel genetic structure. Our findings indicate a possibility of NDM-1 dissemination in Ghana and underscore the need for constant monitoring of carbapenemase-producing bacteria.
- Published
- 2018
32. Impact of deoxycholate on Clostridioides difficile growth, toxin production, and sporulation
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Shuji Tohda, Kyoji Moriya, Yuko Kamiichi, Shu Okugawa, Ryoichi Saito, Alafate Ayibieke, and Yukino Usui
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0301 basic medicine ,Vegetative reproduction ,medicine.disease_cause ,Microbiology ,Article ,law.invention ,03 medical and health sciences ,0302 clinical medicine ,Downregulation and upregulation ,law ,Microbiology epidemiology ,medicine ,Bacteriology ,lcsh:Social sciences (General) ,lcsh:Science (General) ,Cytotoxicity ,Polymerase chain reaction ,Infectious disease ,Multidisciplinary ,Clostridioides difficile ,Chemistry ,Toxin ,Vegetative growth ,Medical microbiology ,Deoxycholate ,Phenotype ,Spore ,Toxin production ,030104 developmental biology ,Sporulation ,lcsh:H1-99 ,Hepatobiliary system ,030217 neurology & neurosurgery ,lcsh:Q1-390 - Abstract
Purpose Bile acids play an important role in Clostridioides difficile life cycle. Deoxycholate (DCA), one of the most abundant secondary bile acids, is known to inhibit vegetative growth and toxin production. However, limited data are available on the role of DCA on C. difficile sporulation. Here, we investigated the phenotypic and genotypic impact of DCA on the growth, toxin production, and sporulation of C. difficile. Methodology Four genetically divergent C. difficile strains were cultured in nutrient-rich broth with and without DCA at various concentrations, and growth activity was evaluated for each strain. Cytotoxicity assays using culture supernatants from cells grown in nutrient-rich broth with and without 0.01% DCA were conducted. Sporulation efficiency was determined using sporulation media with and without 0.01% DCA. Transcript levels of tcdB and spo0A were analyzed using quantitative reverse-transcription polymerase chain reaction. Results We found that DCA led to growth reduction in a dose-depended manner and regulated toxin production by repressing tcdB expression during vegetative growth. To our knowledge, we have also provided the first evidence that DCA reduces C. difficile sporulation efficiency through the downregulation of spo0A expression during the sporulation stage. Conclusions DCA modulates C. difficile sporulation, vegetative growth, and toxin production., Microbiology; Hepatobiliary System; Infectious Disease; Medical Microbiology; Microbiology Epidemiology; Bacteriology; deoxycholate; Clostridioides difficile; sporulation; toxin production; vegetative growth.
- Published
- 2020
33. Antibiotic resistance among GRAM-negative glucose non-fermenting bacilli from Ghana
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A. Ablordy, S. Mahazu, I. Prah, R. Saito, W. Sato, A. Kobayashi, A. Ayibieke, S. Iwanaga, and J. Addow-Thompson
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Bacilli ,Antibiotic resistance ,biology ,Biochemistry (medical) ,Clinical Biochemistry ,Fermentation ,General Medicine ,biology.organism_classification ,Biochemistry ,Gram ,Microbiology - Published
- 2019
34. Fistula between the right pulmonary artery and the left atrium coexisting with a secundum-type atrial septal defect: An unusual case of cyanosis in a girl
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Zhang, Wei-Min, primary, Zhu, Hai-xu, additional, Maimaitiaili, Aizezi, additional, Ayibieke, Naibi, additional, Ermek, Tangsakar, additional, Liu, Jun, additional, Zhang, Zong-gang, additional, and Li, Shi-guo, additional
- Published
- 2019
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35. Antimicrobial susceptibility and extended-spectrum β-lactamase profiles of Escherichia coli and Klebsiella spp. isolated from Ghana
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Sato, W., primary, Mahazu, S., additional, Prah, I., additional, Addow-Thompson, J., additional, Ayibieke, A., additional, Iwanaga, S., additional, Ablordey, A., additional, and Saito, R., additional
- Published
- 2019
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36. Antibiotic resistance among GRAM-negative glucose non-fermenting bacilli from Ghana
- Author
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Ayibieke, A., primary, Kobayashi, A., additional, Mahazu, S., additional, Sato, W., additional, Prah, I., additional, Addow-Thompson, J., additional, Iwanaga, S., additional, Ablordy, A., additional, and Saito, R., additional
- Published
- 2019
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37. Left ventricular remodeling in patients with acute type B aortic dissection after thoracic endovascular aortic repair: Short- and mid-term outcomes
- Author
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Du, Yukui, primary, Aizezi, Maimaitiaili, additional, Lin, Hao, additional, Xie, Xiaobing, additional, He, Jinxia, additional, Qi, Baowen, additional, Zhang, Weimin, additional, Naibi, Ayibieke, additional, Guo, Sheng, additional, Guo, Yongzhong, additional, Liu, Jun, additional, Zhang, Zonggang, additional, Tang, Henian, additional, and Yang, Xiubin, additional
- Published
- 2019
- Full Text
- View/download PDF
38. Molecular characterisation of the NDM-1-encoding plasmid p2189-NDM in an Escherichia coli ST410 clinical isolate from Ghana
- Author
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Ayibieke, Alafate, primary, Sato, Wakana, additional, Mahazu, Samiratu, additional, Prah, Isaac, additional, Addow-Thompson, John, additional, Ohashi, Mitsuko, additional, Suzuki, Toshihiko, additional, Iwanaga, Shiroh, additional, Ablordey, Anthony, additional, and Saito, Ryoichi, additional
- Published
- 2018
- Full Text
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39. [Study on standard of Ferula sinkinangensis seed quality classification]
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Xin, Zhao, Sulaiman, Kaisa, Guo-Qiang, Zhu, and Rehemudula, Ayibieke
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Quality Control ,China ,Plants, Medicinal ,Seeds ,Water ,Germination ,Reference Standards ,Ferula - Abstract
Study on the standard of Ferula sinkinangensis seed quality classification.Chose 30 samples of Ferula sinkiangensis seed. Weight per 1000 seeds, seed germination percentage, seed viability, seed purity, and content of water were mensurated. According to the data, standard of the seed quality classification was set up.Seed germination percentage and weight per 1000 seeds are described as major standard of seed quality classification and others as reference. The first grading seed were described as that, seed viability percentage more than 85.9% and weight per 1000 seeds more than 25.7 g. The second grading seed were described as that, seed viability percentage more than 59.1% and weight per 1000 seeds more than 22.1 g.Set up standard of Ferula sinkinangensis seed quality classification.
- Published
- 2011
40. A Nosocomial Cluster of Roseomonas mucosaBacteremia Possibly Linked to Contaminated Hospital Environment
- Author
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Okamoto, Koh, Ayibieke, Alafate, Saito, Ryoichi, Magara, Yuki, Ogura, Kenichi, Ueda, Reiko, Ogawa, Hina, and Hatakeyama, Shuji
- Abstract
Background:The genus Roseomonas,containing pink-pigmented glucose nonfermentative bacteria, has been associated with various primary and nosocomial human infections; however, to our knowledge, its nosocomial transmission has never been reported in the literature. Here, we report a nosocomial cluster of Roseomonas mucosabacteremia. Methods:Two cases of R. mucosabacteremia in 2018 are described. Clinical and epidemiological investigations were undertaken. Environmental surfaces prone to water contamination in the patient wards were sampled and cultured. The sampled surfaces included sinks, faucets, toilets, sewage, showerheads, refrigerators, exhaust vents, and washing machines. The 2 clinical isolates and all environmental isolates that showed growth of pink colonies were identified using matrix-assisted laser desorption/ionization time of flight mass spectrometry and 16S rRNA gene sequencing. Pulse-field gel electrophoresis (PFGE) was performed and fingerprinting software was used to analyze the DNA restriction patterns and determine their similarity. Results:Two patients who developed R. mucosabacteremia had received care from the same treatment team. The patients were on different wards but had overlapping hospital stays. In addition to the treatment team, no other shared exposure was identified. Moreover, 126 environmental surfaces were sampled, of which 7 samples grew pink colonies. The 9 isolates from the patients and the environmental samples were examined using 16S rRNA gene sequencing. Overall, 7 isolates, including isolates from both patients, were identified as R. mucosa, and the other 2 isolates were identified as Roseomonas gilardiisubsp. rosea(Fig. 1). With 80% similarity as a cutoff, PFGE analysis revealed that the R. mucosaisolates from 2 patients’ blood cultures and 3 environmental isolates (a washing machine in the ward, a sink in the shared washroom, and a sink in the patient room) belonged to the same clone (Fig. 2). Conclusions:The hospital water environment was contaminated with R. mucosa, and the same clone caused bacteremia in 2 separate patients, suggesting nosocomial transmission of R. mucosapossibly linked to contaminated water, environment, and/or patient care.Funding:NoneDisclosures:None
- Published
- 2020
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41. Whole-genome analysis of EC129, an NDM-5-, CTX-M-14-, OXA-10- and MCR-1-co-producing Escherichia coliST167 strain isolated from Japan
- Author
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Nukui, Yoko, Ayibieke, Alafate, Taniguchi, Makoto, Aiso, Yoshibumi, Shibuya, Yuka, Sonobe, Kazunari, Nakajima, Jun, Kanehira, Saki, Hadano, Yoshiro, Tohda, Shuji, Koike, Ryuji, and Saito, Ryoichi
- Abstract
The emergence and spread of carbapenemase-producing Enterobacteriaceae is a worldwide concern. This study reports the whole genome sequence of an NDM-5-, CTX-M-14-, OXA-10- and MCR-1-co-producing Escherichia colisequence type 167 (ST167) multidrug-resistant clinical strain (EC129) isolated from a sputum sample of a hospitalised patient diagnosed with pneumonia.
- Published
- 2019
- Full Text
- View/download PDF
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