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Sasa K, Son R, Oguchi A, Ashizawa K, Hasegawa N, Kubota D, Suehara Y, Takagi T, Okubo T, Akaike K, Sugimoto K, Takahashi M, Sakamoto K, Hashimoto T, Mine S, Fukunaga T, Ishijima M, Hayashi T, Yao T, Murakawa Y, Saito T. NTRK2 expression in gastrointestinal stromal tumors with a special emphasis on the clinicopathological and prognostic impacts. Sci Rep 2024; 14:768. [PMID: 38191907 PMCID: PMC10774370 DOI: 10.1038/s41598-024-51211-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 01/02/2024] [Indexed: 01/10/2024] Open
Abstract
Gastrointestinal stromal tumors (GISTs) are typically characterized by activating mutations of the KIT proto-oncogene receptor tyrosine kinase (KIT) or platelet-derived growth factor receptor alpha (PDGFRA). Recently, the neurotrophic tyrosine receptor kinase (NTRK) fusion was reported in a small subset of wild-type GIST. We examined trk IHC and NTRK gene expressions in GIST. Pan-trk immunohistochemistry (IHC) was positive in 25 (all 16 duodenal and 9 out of 16 small intestinal GISTs) of 139 cases, and all pan-trk positive cases showed diffuse and strong expression of c-kit. Interestingly, all of these cases showed only trkB but not trkA/trkC expression. Cap analysis of gene expression (CAGE) analysis identified increased number of genes whose promoters were activated in pan-trk/trkB positive GISTs. Imbalanced expression of NTRK2, which suggests the presence of NTRK2 fusion, was not observed in any of trkB positive GISTs, despite higher mRNA expression. TrkB expression was found in duodenal GISTs and more than half of small intestinal GISTs, and this subset of cases showed poor prognosis. However, there was not clear difference in clinical outcomes according to the trkB expression status in small intestinal GISTs. These findings may provide a possible hypothesis for trkB overexpression contributing to the tumorigenesis and aggressive clinical outcome in GISTs of duodenal origin.
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Affiliation(s)
- Keita Sasa
- Department of Human Pathology, Juntendo University School of Medicine, Tokyo, Japan
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University School of Medicine, Tokyo, Japan
| | - Raku Son
- RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Akiko Oguchi
- RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Karin Ashizawa
- Department of Human Pathology, Juntendo University School of Medicine, Tokyo, Japan
| | - Nobuhiko Hasegawa
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University School of Medicine, Tokyo, Japan
| | - Daisuke Kubota
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University School of Medicine, Tokyo, Japan
| | - Yoshiyuki Suehara
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University School of Medicine, Tokyo, Japan
| | - Tatsuya Takagi
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University School of Medicine, Tokyo, Japan
| | - Taketo Okubo
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University School of Medicine, Tokyo, Japan
| | - Keisuke Akaike
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University School of Medicine, Tokyo, Japan
- Department of Orthopaedic Surgery, Yamanashi Central Hospital, Yamanashi, Japan
| | - Kiichi Sugimoto
- Department of Coloproctological Surgery, Graduate School of Medicine, Juntendo University, Tokyo, 113-8421, Japan
| | - Makoto Takahashi
- Department of Coloproctological Surgery, Graduate School of Medicine, Juntendo University, Tokyo, 113-8421, Japan
| | - Kazuhiro Sakamoto
- Department of Coloproctological Surgery, Graduate School of Medicine, Juntendo University, Tokyo, 113-8421, Japan
| | - Takashi Hashimoto
- Department of Upper Gastroenterological Surgery, Juntendo University Hospital, Bunkyo-ku, Tokyo, 113-8431, Japan
| | - Shinji Mine
- Department of Upper Gastroenterological Surgery, Juntendo University Hospital, Bunkyo-ku, Tokyo, 113-8431, Japan
| | - Tetsu Fukunaga
- Department of Upper Gastroenterological Surgery, Juntendo University Hospital, Bunkyo-ku, Tokyo, 113-8431, Japan
| | - Muneaki Ishijima
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University School of Medicine, Tokyo, Japan
- Intractable Disease Research Center, Graduate School of Medicine, Juntendo University, Tokyo, 113-8421, Japan
| | - Takuo Hayashi
- Department of Human Pathology, Juntendo University School of Medicine, Tokyo, Japan
| | - Takashi Yao
- Department of Human Pathology, Juntendo University School of Medicine, Tokyo, Japan
| | - Yasuhiro Murakawa
- RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
- Institute for the Advanced Study of Human Biology (ASHBi), Kyoto University, Kyoto, Japan
- IFOM ETS - the AIRC Institute of Molecular Oncology, Milan, Italy
| | - Tsuyoshi Saito
- Department of Human Pathology, Juntendo University School of Medicine, Tokyo, Japan.
- Intractable Disease Research Center, Graduate School of Medicine, Juntendo University, Tokyo, 113-8421, Japan.
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Son R, Yamazawa K, Oguchi A, Suga M, Tamura M, Yanagita M, Murakawa Y, Kume S. Morphomics via next-generation electron microscopy. J Mol Cell Biol 2023:mjad081. [PMID: 38148118 DOI: 10.1093/jmcb/mjad081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2023] Open
Abstract
The living body is composed of innumerable fine and complex structures. Although these structures have been studied in the past, a vast amount of information pertaining to them still remains unknown. When attempting to observe these ultra-structures, the use of electron microscopy (EM) has become indispensable. However, conventional EM settings are limited to a narrow tissue area, which can bias observations. Recently, new trends in EM research have emerged that provide coverage of far broader, nano-scale fields of view for two-dimensional wide areas and three-dimensional large volumes. Moreover, cutting-edge bioimage informatics conducted via deep learning has accelerated the quantification of complex morphological bioimages. Taken together, these technological and analytical advances have led to the comprehensive acquisition and quantification of cellular morphology, which now arises as a new omics science termed 'morphomics'.
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Affiliation(s)
- Raku Son
- RIKEN-IFOM Joint Laboratory for Cancer Genomics, RIKEN Center for Integrative Medical Sciences, Yokohama 230-0045, Japan
- Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Kenji Yamazawa
- Advanced Manufacturing Support Team, RIKEN Center for Advanced Photonics, Wako 351-0198, Japan
| | - Akiko Oguchi
- RIKEN-IFOM Joint Laboratory for Cancer Genomics, RIKEN Center for Integrative Medical Sciences, Yokohama 230-0045, Japan
- Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
| | - Mitsuo Suga
- Multimodal Microstructure Analysis Unit, RIKEN-JEOL Collaboration Center, Kobe 650-0047, Japan
| | - Masaru Tamura
- Technology and Development Team for Mouse Phenotype Analysis, RIKEN BioResource Research Center, Tsukuba 305-0074, Japan
| | - Motoko Yanagita
- Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
- Institute for the Advanced Study of Human Biology (ASHBi), Kyoto University, Kyoto 606-8501, Japan
| | - Yasuhiro Murakawa
- RIKEN-IFOM Joint Laboratory for Cancer Genomics, RIKEN Center for Integrative Medical Sciences, Yokohama 230-0045, Japan
- Institute for the Advanced Study of Human Biology (ASHBi), Kyoto University, Kyoto 606-8501, Japan
- IFOM-the FIRC Institute of Molecular Oncology, Milan 20139, Italy
| | - Satoshi Kume
- Laboratory for Pathophysiological and Health Science, RIKEN Center for Biosystems Dynamics Research, Kobe 650-0047, Japan
- Center for Health Science Innovation, Osaka City University, Osaka 530-0011, Japan
- Osaka Electro-Communication University, Neyagawa 572-8530, Japan
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Son R, Nagahama M, Tanemoto F, Ito Y, Taki F, Tsugitomi R, Nakayama M. Hyponatremia presenting with hourly fluctuating urine osmolality. Endocrinol Diabetes Metab Case Rep 2020; 2020:EDM190155. [PMID: 32408271 PMCID: PMC7274548 DOI: 10.1530/edm-19-0155] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 04/21/2020] [Indexed: 11/08/2022] Open
Abstract
SUMMARY The etiology of hyponatremia is assessed based on urine osmolality and sodium. We herein describe a 35-year-old Asian man with pulmonary tuberculosis and perforated duodenal ulcer who presented with hyponatremia with hourly fluctuating urine osmolality ranging from 100 to 600 mosmol/kg, which resembled urine osmolality observed in typical polydipsia and SIADH simultaneously. Further review revealed correlation of body temperature and urine osmolality. Since fever is a known non-osmotic stimulus of ADH secretion, we theorized that hyponatremia in this patient was due to transient ADH secretion due to fever. In our case, empiric exogenous glucocorticoid suppressed transient non-osmotic ADH secretion and urine osmolality showed highly variable concentrations. Transient ADH secretion-related hyponatremia may be underrecognized due to occasional empiric glucocorticoid administration in patients with critical illnesses. Repeatedly monitoring of urine chemistries and interpretation of urine chemistries with careful review of non-osmotic stimuli of ADH including fever is crucial in recognition of this etiology. LEARNING POINTS Hourly fluctuations in urine osmolality can be observed in patients with fever, which is a non-osmotic stimulant of ADH secretion. Repeated monitoring of urine chemistries aids in the diagnosis of the etiology underlying hyponatremia, including fever, in patients with transient ADH secretion. Glucocorticoid administration suppresses ADH secretion and improves hyponatremia even in the absence of adrenal insufficiency; the etiology of hyponatremia should be determined carefully in these patients.
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Affiliation(s)
- Raku Son
- Department of Nephrology, St. Luke’s International Hospital, Tokyo, Japan
| | - Masahiko Nagahama
- Department of Nephrology, St. Luke’s International Hospital, Tokyo, Japan
| | - Fumiaki Tanemoto
- Department of Nephrology, St. Luke’s International Hospital, Tokyo, Japan
| | - Yugo Ito
- Department of Nephrology, St. Luke’s International Hospital, Tokyo, Japan
| | - Fumika Taki
- Department of Nephrology, St. Luke’s International Hospital, Tokyo, Japan
| | - Ryosuke Tsugitomi
- Department of Pulmonary Medicine, Thoracic Center, St. Luke’s International Hospital, Tokyo, Japan
| | - Masaaki Nakayama
- Department of Nephrology, St. Luke’s International Hospital, Tokyo, Japan
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Son R, Fujimaru T, Kimura T, Taki F, Futatsuyama M, Nagahama M, Nakayama M, Komatsu Y. Association between serum ferritin levels and clinical outcomes in maintenance hemodialysis patients: a retrospective single-center cohort study. Ren Replace Ther 2019. [DOI: 10.1186/s41100-019-0212-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Kanie T, Mizuno A, Kawai F, Iri T, Suzuki T, Oshima S, Fukui S, Son R, Matsuo T. Bibliographic title search for medical cardiological "signs" (eponyms). J Gen Fam Med 2018; 19:223-225. [PMID: 30464873 PMCID: PMC6238235 DOI: 10.1002/jgf2.208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 08/30/2018] [Indexed: 11/07/2022] Open
Abstract
BACKGROUND The word "sign" refers to important physical findings or observations that are useful in diagnosis; however, there are no scientific reviews of "signs." The aim of this paper was to list and review these terms using a bibliographic approach. METHODS We performed a title search of "sign" using a bibliographic search and review approach in MEDLINE and EMBASE. RESULTS We detected 398 papers including 217 medical signs in cardiology. CONCLUSIONS This is the first literature review of eponyms specifically for signs using a bibliographic method, which is useful for the discussion of the appropriateness of eponyms.
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Affiliation(s)
- Takayoshi Kanie
- Department of CardiologySt. Luke's International HospitalTokyoJapan
| | - Atsushi Mizuno
- Department of CardiologySt. Luke's International HospitalTokyoJapan
| | - Fujimi Kawai
- St. Luke's International University LibraryTokyoJapan
| | - Takanobu Iri
- Department of Internal MedicineOkinawa Chubu HospitalOkinawaJapan
| | - Takahiro Suzuki
- Department of Internal MedicineSt. Luke's International HospitalTokyoJapan
| | - Shinichirou Oshima
- Department of Internal MedicineSt. Luke's International HospitalTokyoJapan
| | - Sho Fukui
- Department of Internal MedicineSt. Luke's International HospitalTokyoJapan
| | - Raku Son
- Kidney CenterSt. Luke's International HospitalTokyoJapan
| | - Takahiro Matsuo
- Infectious Diseases DepartmentSt. Luke's International HospitalTokyoJapan
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Son R, Higuchi T, Mizuno A, Koyamada R, Okada S, Yamashiro Y. A Newly Characterized Hemoglobin Variant with a High Oxygen Affinity, Hb Fuchu-II, Presenting with Acute Myocardial Infarction. Intern Med 2016; 55:285-7. [PMID: 26831025 DOI: 10.2169/internalmedicine.55.5311] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A 65-year-old Japanese man presented with acute myocardial infarction (AMI) and polycythemia. Biochemical studies of the patient's hemoglobin (Hb) and the sequencing of his globin genes revealed that the polycythemia was secondary to a high oxygen affinity Hb variant, Hb Fuchu-II. Hb variants with high oxygen affinity can be an additional thrombotic risk factor in older patients and/or those with other risk factors. The patient was diagnosed with hemoglobinopathy after the development of AMI and exemplifies the importance of recognizing such conditions and of taking appropriate prophylactic interventions.
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Affiliation(s)
- Raku Son
- Internal Medicine, St. Luke's International Hospital, Japan
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Elexson N, Afsah-Hejri L, Rukayadi Y, Soopna P, Lee H, Tuan Zainazor T, Nor Ainy M, Nakaguchi Y, Mitsuaki N, Son R. Effect of detergents as antibacterial agents on biofilm of antibiotics-resistant Vibrio parahaemolyticus isolates. Food Control 2014. [DOI: 10.1016/j.foodcont.2013.07.020] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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N E, Son R, Rukayadi Y, Tuan Zainazor TC, Nor Ainy M, Nakaguchi Y, Mitsuaki N. Biosafety of Vibrio Parahaemolyticus Biofilm From Seafood Using Herbs and Spices. ACTA ACUST UNITED AC 2013. [DOI: 10.14511/jlm.2013.010305] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Goh S, Kuan C, Loo Y, Chang W, Lye Y, Soopna P, Tang J, Nakaguchi Y, Nishibuchi M, Afsah-Hejri L, Son R. Listeria monocytogenes in retailed raw chicken meat in Malaysia. Poult Sci 2012; 91:2686-90. [DOI: 10.3382/ps.2012-02349] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Learn-Han L, Yoke-Kqueen C, Shiran MS, Vui-Ling CMW, Nurul-Syakima AM, Son R, Andrade HM. Identification of actinomycete communities in Antarctic soil from Barrientos Island using PCR-denaturing gradient gel electrophoresis. Genet Mol Res 2012; 11:277-91. [PMID: 22370930 DOI: 10.4238/2012.february.8.3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The diversity of specific bacteria taxa, such as the actinomycetes, has not been reported from the Antarctic island of Barrientos. The diversity of actinomycetes was estimated with two different strategies that use PCR-denaturing gradient gel electrophoresis. First, a PCR was applied, using a group-specific primer that allows selective amplification of actinomycete sequences. Second, a nested-PCR approach was used that allows the estimation of the relative abundance of actinomycetes within the bacterial community. Molecular identification, which was based on 16S rDNA sequence analysis, revealed eight genera of actinomycetes, Actinobacterium, Actinomyces, an uncultured Actinomycete, Streptomyces, Leifsonia, Frankineae, Rhodococcus, and Mycobacterium. The uncultured Actinomyces sp and Rhodococcus sp appear to be the prominent genera of actinomycetes in Barrientos Island soil. PCR-denaturing gradient gel electrophoresis patterns were used to look for correlations between actinomycete abundance and environmental characteristics, such as type of rookery and vegetation. There was a significant positive correlation between type of rookery and abundance of actinomycetes; soil samples collected from active chinstrap penguin rookeries had the highest actinomycete abundance. Vegetation type, such as moss, which could provide a microhabitat for bacteria, did not correlate significantly with actinomycete abundance.
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Affiliation(s)
- L Learn-Han
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Selangor Darul Ehsan, Malaysia
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Jalili M, Jinap S, Son R. The effect of chemical treatment on reduction of aflatoxins and ochratoxin A in black and white pepper during washing. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2011; 28:485-93. [PMID: 21416415 DOI: 10.1080/19440049.2010.551300] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The effect of 18 different chemicals, which included acidic compounds (sulfuric acid, chloridric acid, phosphoric acid, benzoic acid, citric acid, acetic acid), alkaline compounds (ammonia, sodium bicarbonate, sodium hydroxide, potassium hydroxide, calcium hydroxide), salts (acetate ammonium, sodium bisulfite, sodium hydrosulfite, sodium chloride, sodium sulfate) and oxidising agents (hydrogen peroxide, sodium hypochlorite), on the reduction of aflatoxins B(1), B(2), G(1) and G(2) and ochratoxin A (OTA) was investigated in black and white pepper. OTA and aflatoxins were determined using HPLC after immunoaffinity column clean-up. Almost all of the applied chemicals showed a significant degree of reduction on mycotoxins (p < 0.05). The lowest and highest reduction of aflatoxin B(1), which is the most dangerous aflatoxin, was 20.5% ± 2.7% using benzoic acid and 54.5% ± 2.7% using sodium hydroxide. There was no significant difference between black and white peppers (p < 0.05).
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Affiliation(s)
- M Jalili
- Centre of Excellence for Food Safety Research, Department of Food Technology, Faculty of Food Science and Technology, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
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Tang JYH, Nishibuchi M, Nakaguchi Y, Ghazali FM, Saleha AA, Son R. Transfer of Campylobacter jejuni from raw to cooked chicken via wood and plastic cutting boards. Lett Appl Microbiol 2011; 52:581-8. [PMID: 21375548 DOI: 10.1111/j.1472-765x.2011.03039.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS We quantified Campylobacter jejuni transferred from naturally contaminated raw chicken fillets and skins to similar cooked chicken parts via standard rubberwood (RW) and polyethylene cutting boards (PE). METHODS AND RESULTS RW and PE cutting boards (2.5 × 2.5 cm(2)) were constructed. RW surfaces were smooth and even, whereas PE was uneven. Scoring with scalpel blades produced crevices on RW and flaked patches on the PE boards. Raw chicken breast fillets or skin pieces (10 g) naturally contaminated with Camp. jejuni were used to contaminate the cutting boards (6.25 cm(2)). These were then briefly covered with pieces of cooked chicken. Campylobacter jejuni on raw chicken, the boards, and cooked chicken pieces were counted using a combined most-probable-number (MPN)-PCR method. The type of cutting board (RW, PE; unscored and scored) and temperature of cooked chicken fillets and skins were examined. Unscored PE and RW boards were not significantly different in regards to the mean transfer of Camp. jejuni from raw samples to the boards. The mean transfer of Camp. jejuni from scored RW was significantly higher than from scored PE. When the chicken fillets were held at room temperature, the mean transfer of Camp. jejuni from scored RW and PE was found to be 44.9 and 40.3%, respectively. CONCLUSIONS RW and PE cutting boards are potential vehicles for Camp. jejuni to contaminate cooked chicken. Although cooked chicken maintained at high temperatures reduced cross-contamination via contaminated boards, a risk was still present. SIGNIFICANCE AND IMPACT OF THE STUDY Contamination of cooked chicken by Camp. jejuni from raw chicken via a cutting board is influenced by features of the board (material, changes caused by scoring) and chicken (types of chicken parts and temperature of the cooked chicken).
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Affiliation(s)
- J Y H Tang
- Faculty of Food Technology, Universiti Sultan Zainal Abidin, Kuala Terengganu, Terengganu, Malaysia
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Zainazor CT, Hidayah MSN, Chai LC, Tunung R, Ghazali FM, Son R. Retraction: The Scenario of Norovirus Contamination in Food and Food Handlers. J Microbiol Biotechnol 2010. [DOI: 10.4014/jmb.0906.06032] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Tuan Zainazor C, Hidayah MSN, Chai LC, Tunung R, Ghazali FM, Son R. The scenario of norovirus contamination in food and food handlers. J Microbiol Biotechnol 2010; 20:229-237. [PMID: 20208424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Recently, many cases related to viral gastroenteritis outbreaks have been reported all over the world. Noroviruses are found to be leading as the major cause of outbreaks of acute gastroenteritis. Patients with the acute gastroenteritis normally found to be positive with norovirus when stools and vomit were analyzed. This paper reviews various activities and previous reports that describe norovirus contaminated in various food matrixes and relationship between food handlers. Lately, a numbers of norovirus outbreaks have been reported which are involved fresh produce (such as vegetables, fruits), shellfish and prepared food. Food produces by infected food handlers may therefore easily contaminated. In addition, food that required much handling and have been eaten without heat treatment gave the high risk for getting foodborne illnesses. The standard method for detection of norovirus has already been available for stool samples. However, only few methods for detection of norovirus in food samples have been developed until now.
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Affiliation(s)
- C Tuan Zainazor
- National Public Health Laboratory, Ministry of Health Malaysia, Lot 1853, Kg. Melayu Sungai Buloh, 47000 Sungai Buloh, Selangor, Malaysia.
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Raftari M, Jalilian FA, Abdulamir A, Son R, Sekawi Z, Fatimah A. Effect of organic acids on Escherichia coli O157:H7 and Staphylococcus aureus contaminated meat. Open Microbiol J 2009; 3:121-7. [PMID: 19696918 PMCID: PMC2729390 DOI: 10.2174/1874285800903010121] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2009] [Revised: 06/24/2009] [Accepted: 06/25/2009] [Indexed: 11/22/2022] Open
Abstract
Appropriate and safe antibacterial agents able to decontaminate meat surfaces have long been big concern of meat industry. In an attempt to manage beef carcass contamination, spray wash treatments utilizing three concentrations (1, 1.5 and 2%) of acetic, lactic, propionic and formic acids were performed to evaluate their efficacy in reducing numbers of Escherichia coli O157:H7 and Staphylococcus aureus on meat tissues. The procured beef pieces of freshly slaughtered animals were decontaminated with hot water and then inoculated with E. coli O157:H7 and S. aureus individually which then were spray washed with organic acids separately. The total plate count of the treated samples showed that the populations of bacteria decreased after being exposed to organic acids. Spray wash of formic acid resulted in the highest reduction of both bacterial species on meat surface. Significantly, higher log reductions were obtained for S. aureus than E. coli O157:H7. It was concluded that organic acids are highly effective in decontaminating meat surfaces and organic acids are shown to be safe, simple, efficient, and cheap modality of meat decontamination which can be highly recommended for industrial scales.
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Affiliation(s)
- M Raftari
- Faculty of Food Science and Technology, Universiti Putra Malaysia, 43300, Serdang, Selangor, Malaysia
| | - F. Azizi Jalilian
- Faculty of Medicine and Health Science, Universiti Putra Malaysia, 43300, Serdang, Selangor, Malaysia
| | - A.S Abdulamir
- Microbiology research department, Institute of Bioscience, Universiti Putra Malaysia, 43300, Serdang, Selangor, Malaysia
| | - R Son
- Faculty of Food Science and Technology, Universiti Putra Malaysia, 43300, Serdang, Selangor, Malaysia
| | - Z Sekawi
- Faculty of Medicine and Health Science, Universiti Putra Malaysia, 43300, Serdang, Selangor, Malaysia
| | - A.B Fatimah
- Faculty of Food Science and Technology, Universiti Putra Malaysia, 43300, Serdang, Selangor, Malaysia
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Wan Norhas W, Abdulamir A, Abu Bakar F, Son R, Norhafniza A. The Health and Toxic Adverse Effects of Fusarium Fungal Mycotoxin, Fumonisins, on Human Population. ACTA ACUST UNITED AC 2009. [DOI: 10.3844/ajidsp.2009.273.281] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Yoke-Kqueen C, Learn-Han L, Noorzaleha A, Son R, Sabrina S, Jiun-Horng S, Chai-Hoon K. Characterization of multiple-antimicrobial-resistant Salmonella enterica Subsp. enterica isolated from indigenous vegetables and poultry in Malaysia. Lett Appl Microbiol 2008; 46:318-24. [DOI: 10.1111/j.1472-765x.2007.02311.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Che Man Y, Aida A, Raha A, Son R. Identification of pork derivatives in food products by species-specific polymerase chain reaction (PCR) for halal verification. Food Control 2007. [DOI: 10.1016/j.foodcont.2006.05.004] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Haryani Y, Noorzaleha A, Fatimah A, Noorjahan B, Patrick G, Shamsinar A, Laila R, Son R. Incidence of Klebsiella pneumonia in street foods sold in Malaysia and their characterization by antibiotic resistance, plasmid profiling, and RAPD–PCR analysis. Food Control 2007. [DOI: 10.1016/j.foodcont.2006.04.009] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Yamashita T, Kasaoka S, Son R, Gordon IL, Khan R, Neet J, Hedrick AD, Tobis JM. Optical coherent reflectometry: a new technique to guide invasive procedures. Catheter Cardiovasc Interv 2001; 54:257-63. [PMID: 11590695 DOI: 10.1002/ccd.1278] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The success rate of percutaneous transluminal coronary angioplasty for chronic total arterial occlusions is still unsatisfactory. Inability to cross the lesion with a guidewire is a major cause of failure. Optical coherent reflectometry (OCR) is a new method of using laser light to measure the depth of tissue from the end of an optic fiber. This study tests whether an OCR prototype guidewire provides a guidance system that might be useful to assist reopening chronic total arterial occlusions. An OCR fiber optic within a 0.014" hypotube was developed using the interference pattern of two reflected light beams (wave length 1,300 nm). To determine if OCR can distinguish different tissue types, plaques of human lower extremity arterial segments were visually divided into three types (calcified, white, or yellow). The slope of the initial reflectance of the OCR curve was calculated and compared between the three groups. In six other arteries, the OCR wire was advanced longitudinally through occluded human artery segments in vitro. Guidewire position was determined by OCR and compared to the position of the guidewire tip observed simultaneously by intravascular ultrasound (IVUS) imaging. In 16 arterial surface segments, calcified plaques had a significantly steeper slope than white or yellow plaques (-227.2 +/- 82.2; -81.5 +/- 12.9; -103.6 +/- 19.6 dB/mm; P < 0.01). For the determination of the guidewire position, IVUS and OCR corresponded correctly in 82% of 28 measurements. Sensitivity and specificity of OCR for detection of plaque versus the media/adventitia boundary were 79% and 89%, respectively (P < 0.001). OCR can distinguish calcified from noncalcified plaque and may distinguish plaque from the media/adventitia boundary. This technology may be useful as a means to help navigate a guidewire safely through an occluded artery.
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Affiliation(s)
- T Yamashita
- Division of Cardiology, Department of Medicine, University of California, Irvine, California 90095, USA
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Al-Haddawi MH, Jasni S, Zamri-Saad M, Mutalib AR, Zulkifli I, Son R, Sheikh-Omar AR. In vitro study of Pasteurella multocida adhesion to trachea, lung and aorta of rabbits. Vet J 2000; 159:274-81. [PMID: 10775473 DOI: 10.1053/tvjl.1999.0418] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In vitro experiments were undertaken to study the adhesion and colonization to tracheal mucosa, lung and aorta explants from freshly killed rabbits of two different strains of Pasteurella multocida. Serotype A:3 (capsulated, fimbriae +, haemagglutination -, dermonecrotic toxin -) isolated from a rabbit with rhinitis, and serotype D:1 (non-capsulated, fimbriae +, haemagglutination +, dermonecrotic toxin +) isolated from a dead rabbit with septicaemia, were used. When the explants were observed under the scanning electron microscope, the type D strain was highly adherent to trachea and aorta explants compared to the type A strain. Adhesion to lung explants was best achieved by the type A strain after 45 min incubation, but after 2 h incubation no significant difference was observed between the strains. Our data indicate that the presence of fimbriae and the absence of capsule seem to enhance the adherence of P. multocida type D strain to tracheal tissue. The capsular material of P. multocida type A strain and the toxin of the type D strain seem to influence the adherence to lung tissue in rabbit. Adhesion of strain D to aorta may indicate the expression of receptors on the endothelium to that strain and may also explain the ability of certain strains to cause septicaemia.
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Affiliation(s)
- M H Al-Haddawi
- Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
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Al-Haddawi MH, Jasni S, Zamri-Saad M, Mutalib AR, Son R, Sheikh-Omar AR. Ultrastructural observation of nasal and pulmonary intracellular Pasteurella multocida A:3 in rabbits. Vet Res Commun 2000; 24:153-67. [PMID: 10836274 DOI: 10.1023/a:1006452230452] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Sixteen 8- to 9-week-old Pasteurella multocida-free rabbits were divided into two equal groups. Eight rabbits in one group were inoculated intranasally with P. multoida type A:3. The other eight were inoculated intranasally with phosphate-buffered saline and used as controls. Nasal swabs taken before and after inoculation were cultured for bacterial isolation. Post-mortem nasal swabs and lung samples were cultured for bacteriological isolation. Nasal mucosa and lung samples were collected and processed for transmission electron microscopy. Pasteurella multocida was isolated from the nasal cavity of all infected rabbits and from the lungs of four infected rabbits. Degenerative ultrastructural changes in epithelial cells and endothelial cells were seen in the infected rabbits. Deciliation of the ciliated epithelium and hyperplasia of the goblet cells in the nasal mucosa were noted. Thickening of the alveolar septa due to hyperplasia of type II pneumocytes, swelling of the endothelial lining of capillaries and infiltration of inflammatory cells were also observed. Intracellular invasion of the nasal epithelial cells and of type II pneumocytes by the organism was observed. Coccobacilli were observed in membrane-bound vacuoles in the cytoplasm of these cells. The vacuoles were adjacent to the host-cell mitochondria and some of these vacuoles appeared to be fused to the mitochondrial membrane. Some type I pneumocytes with intracellular membrane-bound vacuoles containing bacterial cells showed protrusions, which appeared to detach into the alveolar lumina. These results indicated that P. multocida serotype A:3 in rabbits can invade the epithelial cell and cause structural changes in the interstitium, epithelium and endothelium. Heterophils and macrophages appear to play important roles in tissue injury.
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Affiliation(s)
- M H Al-Haddawi
- Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang, Selangor
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Son R, Nimita F, Rusul G, Nasreldin E, Samuel L, Nishibuchi M. Isolation and molecular characterization of vancomycin-resistant Enterococcus faecium in Malaysia. Lett Appl Microbiol 1999; 29:118-22. [PMID: 10499300 DOI: 10.1046/j.1365-2672.1999.00598.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Nineteen strains of vancomycin-resistant Enterococcus faecium isolated from 10 of 75 (13.3%) tenderloin beef samples were examined for resistance to selected antibiotics, presence of plasmids, and genetic diversity by random amplification of polymorphic DNA analysis. All strains showed multiple resistant to the antibiotics tested. Multiple antibiotic indexing of the vancomycin-resistant E. faecium strains showed that all (100%) originated from high risk contamination environments where antibiotics were often used. Plasmids ranging in size from 1.5 to 36 megadalton were detected in 15 of 19 (79%) strains. Thus, three plasmid profiles and eight antibiotypes were observed among the E. faecium strains. A high degree of polymorphism was obtained by combining the results of the two primers used; with the 19 E. faecium strains being differentiated into 19 RAPD-types. These preliminary results suggest that RAPD-PCR has application for epidemiologic studies and that resistance patterns and plasmid profiling could be used as an adjunct to RAPD for the typing of E. faecium in the study area.
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Affiliation(s)
- R Son
- Department of Biotechnology, Faculty of Food Science and Biotechnology, University Putra Malaysia, Serdang, Selangor, Malaysia.
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Abstract
BACKGROUND Intravascular ultrasound (IVUS) is a sensitive method for assessing allograft vasculopathy in heart transplant recipients, but it is not known whether this instrumentation traumatizes the transplanted arteries and affects progression of arteriopathy. METHODS AND RESULTS Yearly coronary angiograms were obtained in 86 patients who underwent heart transplantation between January 1991 and May 1995. Patients were divided into 3 groups: (1) no IVUS performed after transplantation (group 1, n = 47); (2) IVUS of the left anterior descending artery (LAD) performed only at year 1 (group 2, n = 13); and (3) IVUS of the LAD performed at both baseline (within 2 months after transplantation) and year 1 after transplantation (group 3, n = 26). Coronary angiography measurements of lumen diameter were performed at 5 segments along the length of the LAD and left circumflex artery (LCX) from baseline through the second-year studies except in group 2, which did not receive a baseline angiogram; IVUS measurements were obtained at 10 cross sections from each artery. At baseline, there was no significant difference in vessel diameter for either the LAD or the LCX artery between the IVUS (group 3) and no IVUS (group 1) groups. Within each group, the lumen of both the LAD and LCX narrowed from baseline to year 1 (group 1: 3.3 +/- 0.6 mm to 2.8 +/- 0.5 mm in LAD, P =.001; 3. 3 +/- 0.6 mm to 3.0 +/- 0.5 mm in LCX, P =.006; group 3: 3.5 +/- 0.7 mm to 3.1 +/- 0.6 mm in LAD, P =.01; 3.1 +/- 0.6 mm to 2.8 +/- 0.5 mm in LCX, P = 0.07), but there were no significant differences between the instrumented artery (LAD) and control artery (LCX) or further changes observed at year 2. There were also no significant differences in the percent reductions at year 1 and year 2 between arteries or between groups. By IVUS, from baseline to year 1 in group 3, the plaque cross-sectional area (CSA) increased (1.6 +/- 1. 9 to 2.3 +/- 1.7 mm(2), P <.0001), the lumen CSA decreased (12.7 +/- 3.7 to 11.7 +/- 3.3 mm(2), P =.04), and the maximum lumen diameter decreased (4.2 +/- 0.6 to 4.0 +/- 0.6 mm, P =.04). CONCLUSIONS The use of IVUS is not associated with acceleration of arteriopathy in heart transplantation recipients. Luminal narrowing occurs predominantly during the first year after transplantation. There was no significant change in lumen dimensions during the second year.
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Affiliation(s)
- R Son
- University of California, Department of Medicine/Cardiology, Irvine, USA
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Abstract
BACKGROUND The purpose of this study was to assess the feasibility and accuracy of a video telecommunication network to transmit coronary images to provide on-line interaction between personnel in a cardiac catheterization laboratory and a remote core laboratory. METHODS A telecommunication system was installed in the cardiac catheterization laboratory at Kaiser Hospital, Los Angeles, and the core laboratory at the University of California, Irvine, approximately 40 miles away. Cineangiograms, live fluoroscopy, intravascular ultrasound studies and images of the catheterization laboratory were transmitted in real time over a dedicated T1 line at 768 kilobytes/second at 15 frames/second. These cases were performed during a clinical study of angiographic guidance versus intravascular ultrasound (IVUS) guidance of stent deployment. During the cases the core laboratory performed quantitative analysis of the angiograms and ultrasound images. Selected images were then annotated and transmitted back to the catheterization laboratory to facilitate discussion during the procedure. RESULTS A successful communication hookup was obtained in 39 (98%) of 40 cases. Measurements of angiographic parameters were very close between the original cinefilm and the transmitted images. Quantitative analysis of the ultrasound images showed no significant difference in any of the diameter or cross-sectional area measurements between the original ultrasound tape and the transmitted images. The telecommunication link during the interventional procedures had a significant impact in 23 (58%) of 40 cases affecting the area to be treated, the size of the inflation balloon, recognition of stent underdeployment, or the existence of disease in other areas that was not noted on the original studies. CONCLUSIONS Current video telecommunication systems provide high-quality images on-line with accurate representation of cineangiograms and intravascular ultrasound images. This system had a significant impact on 58% of the cases in this small clinical trial. Telecommunication networks between hospitals and a central core laboratory may facilitate physician training and improve technical skills and judgement during interventional procedures. This project has implications for how multicenter clinical trials could be operated through telecommunication networks to ensure conformity with the protocol.
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Affiliation(s)
- J Tobis
- Division of Cardiology, University of California, Orange, CA, USA.
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Son R, Rusul G, Samuel L, Senthil S, Rasip A, Nasreldin EH, Nishibuchi M. Note: characterization of Vibrio cholerae O139 Bengal isolated from water in Malaysia. J Appl Microbiol 1998; 85:1073-7. [PMID: 9871327 DOI: 10.1111/j.1365-2672.1998.tb05273.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Four Vibrio cholerae O139 Bengal strains isolated from surface water were characterized by antibiotic resistance, plasmid profile, presence of cholera toxin gene and random amplification of polymorphic DNA (RAPD) analysis. All four strains exhibit multiple resistance towards the antibiotics tested with a multiple antibiotic resistance index of 0.5-0.66, and harboured a 2.0 MDa non-conjugative plasmid. The Vibrio cholerae O139 Bengal were positive for the cholera toxin gene. Antibiotyping and random amplification of polymorphic DNA analysis with four primers proved to be useful in discriminating the isolates. RAPD proved to be more sensitive. These results reveal that there is significant genetic diversity among the Vibrio cholerae O139 Bengal strains studied.
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Affiliation(s)
- R Son
- Department of Biotechnology, University Putra Malaysia, Serdang, Selangor, Malaysia.
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Kasaoka S, Son R, Eslami M, Pierman C, Currier J, Yeatman LA, Tobis JM. Comparison of the sheath delivery system versus bare stenting for coronary stent implantation. Cathet Cardiovasc Diagn 1998; 43:386-94; discussion 395-6. [PMID: 9554762 DOI: 10.1002/(sici)1097-0304(199804)43:4<386::aid-ccd5>3.0.co;2-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Outside the United States, Palmaz-Schatz coronary stents are implanted by hand-crimping the stent to a high pressure balloon without the use of a protective sheath. This lowers the delivery profile, increases the ease of deployment, and ensures that the postdilatation balloon is centered on the stent. To assess this bare stenting technique, 209 patients were retrospectively analyzed: 92 patients (107 lesions) with the sheath protected stent delivery system (SDS) and 117 patients (150 lesions) with the bare stent approach. The number of balloons used per lesion in the bare stent group was significantly less than in the SDS group (1.9 +/- 0.6 vs. 3.8 +/- 1.2, P < 0.0001). In addition, the procedure time in the bare stent group was significantly shorter than in the SDS group (106 +/- 55 vs. 134 +/- 60 min, P = 0.001). There was no difference in frequency of adverse events or stent displacement during the procedure. The bare stenting technique decreases the procedure time, reduces the number of balloons used, and is as safe as the SDS approach.
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Affiliation(s)
- S Kasaoka
- Department of Medicine, University of California, Irvine, Orange 92868-3298, USA
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Tobis J, Aharonian V, Mansukhani P, Jhandyala R, Kasaoka S, Son R, Browning R, Youngblood L, Thompson M. Video networking of cardiac catheterization laboratories. J Digit Imaging 1997; 10:113-5. [PMID: 9268854 PMCID: PMC3452827 DOI: 10.1007/bf03168672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
UNLABELLED A video telecommunication network was established to transmit coronary images between a cardiac catheterization laboratory and a remote core laboratory. In 40 patients during interventional procedures, cine angiograms, live fluoroscopy, intravascular ultrasound studies, and images of the cath lab were transmitted in real time over a T1 line at 768 kbits/second at 15 frames/second. RESULTS Measurements of angiographic and intravascular ultrasound parameters were very close between the original studies and the transmitted images. The telecommunication link up during the interventional procedures had a significant affect in 58% of cases.
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Affiliation(s)
- J Tobis
- University of California, Irvine, Medical Center, Division of Cardiology, Orange 92868-3298, USA
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Son R, Rusul G, Sahilah AM, Zainuri A, Raha AR, Salmah I. Antibiotic resistance and plasmid profile of Aeromonas hydrophila isolates from cultured fish, Telapia (Telapia mossambica). Lett Appl Microbiol 1997; 24:479-82. [PMID: 9203404 DOI: 10.1046/j.1472-765x.1997.00156.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Strains of Aeromonas hydrophila isolates from skin lesions of the common freshwater fish, Telapia mossambica, were screened for the presence of plasmid DNA by agarose gel electrophoresis and tested for susceptibility to 10 antimicrobial agents. Of the 21 fish isolates examined, all were resistant to ampicillin and sensitive to gentamycin. Most isolates were resistant to streptomycin (57%), tetracycline (48%) and erythromycin (43%). While seven of 21 isolates harboured plasmids, with sizes ranging from 3 to 63.4 kilobase pair (kb), it was only possible to associate the presence of a plasmid with antibiotic resistance (ampicillin and tetracycline) in strain AH11. Both the plasmid and the associated antimicrobial resistance could be transferred to an Escherichia coli recipient by single-step conjugation at a frequency of 4.3 x 10(-3) transconjugants per donor cell.
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Affiliation(s)
- R Son
- Department of Biotechnology, Faculty of Food Science and Biotechnology, University Pertanian Malaysia, Selangor, Malaysia
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Son R, Rusu G, Karim MI. Conjugal transfer of plasmids and antibiotic resistance among Escherichia coli isolated from animals in a rural area in Sarawak (Malaysia). J Appl Microbiol 1997; 82:240-4. [PMID: 12452600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
Abstract
Thirty-six strains of Escherichia coli isolated from animals in Bario, a remote area in Sarawak, Malaysia, were examined for presence of plasmid DNA and their susceptibility to nine antimicrobial agents. Of the total 36 isolates, five bovine and six canine isolates were found to contain plasmid DNA ranging in sizes from 2.6 to 70 kilobases. All were susceptible to chloramphenicol, erythromycin, gentamicin, nalidixic acid and neomycin but resistance to ampicillin (47%), erythromycin (19%), streptomycin (25%) and tetracycline (11%) was observed. Resistance was associated with carriage of a 47 kb (SC98), 70 kb, (SC133) and 56 and 4.6 kb (SC119) plasmids which were transmissible to the Escherichia coli K12 recipient. It is concluded that animals form a potential reservoir of R plasmids carrying E. coli in the study area.
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Affiliation(s)
- R Son
- Department of Genetics and Cellular Biology, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia.
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Son R, Rusul G, Karim M. Conjugal transfer of plasmids and antibiotic resistance among Escherichia coli isolated from animals in a rural area in Sarawak (Malaysia). J Appl Microbiol 1997. [DOI: 10.1111/j.1365-2672.1997.tb02857.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Son R, Rusul G, Karim M. Conjugal transfer of plasmids and antibiotic resistance among Escherichia coli isolated from animals in a rural area in Sarawak (Malaysia). J Appl Microbiol 1997. [DOI: 10.1111/j.1365-2672.1997.tb03579.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Son R, Ansary A. Molecular cloning and transposition of a kanamycin resistance determinant from Campylobacter jejuni between replicons in Escherichia coli. World J Microbiol Biotechnol 1996; 12:353-6. [PMID: 24415309 DOI: 10.1007/bf00340210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 01/02/1996] [Accepted: 01/29/1996] [Indexed: 10/26/2022]
Abstract
This paper reports a restriction map of a fragment of DNA encoding kanamycin resistance cloned from plasmid DNA of Campylobacter jejuni ABA94 in the recombinant plasmid pRS9421-1. In transposition experiments, kanamycin-resistant R751::km9421 transconjugants appeared at frequencies of 10(-7) per donor cell. These transconjugants harboured a plasmid 4 kb larger than the parental 49 kb plasmid R751. Restriction enzyme analysis and Southern blot hybridization of these transconjugants showed that the kanamycin resistant determinant had transposed from recombinant plasmid pRS9421-1 to plasmid R751.
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Son R, Ansary A, Rusul G, Karim MIA. Isolation of verotoxin-producing Escherichia coli associated with diarrhoea in Malaysia containing plasmids showing homology with biotinylated Shiga-like toxin DNA gene probes. World J Microbiol Biotechnol 1996; 12:243-6. [DOI: 10.1007/bf00360921] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 01/22/1996] [Accepted: 01/22/1996] [Indexed: 10/26/2022]
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Muraki N, Son R, Cho Y, Niwayama H, Yamada Z. [Shone's syndrome]. Ryoikibetsu Shokogun Shirizu 1996:311-313. [PMID: 9047863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Affiliation(s)
- N Muraki
- Department of Internal Medicine, Chiba Municipal Kaihin Hospital
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