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Tan LTH, Ho KKF, Fong GCY, Ong KL. Subacute Combined Degeneration of the Spinal Cord. HONG KONG J EMERG ME 2017. [DOI: 10.1177/102490791001700115] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
We report a case of a 79-year-old gentleman presenting with numbness of both hands. A magnetic resonance imaging of the cervical spine demonstrated features suggestive of subacute combined degeneration of the spinal cord which was further supported by a low serum vitamin B12. This is a reversible condition if early diagnosis can be made and vitamin B12 therapy promptly given. Delayed treatment can result in irreversible neurological impairment.
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Abstract
Appendicitis is one of the most common acute abdominal conditions encountered in the Emergency Department. It is a surgical condition that can affect any person of any age and often with varying clinical presentations. In the majority of cases, the diagnosis is straightforward. However in some, the diagnosis requires a heightened clinical suspicion. The application of adjuvant laboratory tests and diagnostic imaging helps to reduce the associated complications, morbidity and mortality of delayed diagnosis.
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Tan LTH, Ong KL. Painless Gross Haematuria. HONG KONG J EMERG ME 2017. [DOI: 10.1177/102490790701400111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Inflammatory pseudotumour is a benign mesenchymal lesion that has distinct pathological features. Patients often present with haematuria, abdominal pain or recurrent cystitis. There are overlapping features with bladder sarcoma in presentation, age range, and size, but the pseudotumour does not metastasise. Awareness of this unusual lesion is important to prevent its misinterpretation. Complete surgical excision of the tumour mass is the treatment of choice.
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Abstract
Purple discolouration of urine is not commonly encountered in accident and emergency departments. We report a case of an elderly gentleman on long-term urinary catheter who presented with purple discolouration of urine. He was found to have urinary tract infection caused by the bacteria Proteus mirabilis. The urine became clear after urinary catheter change and antibiotic treatment. This is called the purple urine bag syndrome and emergency physicians should be aware of this uncommon condition and the associated potentially dangerous conditions in order to initiate appropriate management.
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Tse CL, Lui CT, Wong CY, Ong KL, Fung HT, Tang SYH. Impact of a Sepsis Guideline in Emergency Department on Outcome of Patients with Severe Sepsis. HONG KONG J EMERG ME 2017. [DOI: 10.1177/102490791702400302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Objective A dedicated program with guideline to enhance sepsis care was launched in July 2014 in Emergency Department (ED) of two regional hospitals. The study aimed to evaluate the effectiveness of the interventional program for severe sepsis patients, in antibiotic delivery rate and survival outcome. Methods It is a before-and-after interventional study with data from July to December 2013 and August 2014 to January 2015. A dedicated program for severe sepsis patients was introduced in July 2014. The outcome measures were blood culture rate, antibiotic administration rate in ED and mortality. Kaplan-Meier analysis and log-rank test was used for comparison of the survival. Multivariate Cox proportional hazards model was constructed to predict time to mortality adjusted for covariates. Results 64 patients were included, 31 patients were in the pre-intervention group whereas 33 post-intervention. Both blood culture rate (29% vs 72.7%; p<0.001) and antibiotics administration in ED (38.7% vs 72.7%, p=0.0011) were significantly increased. Survival outcome was significantly improved in patients receiving timely antibiotics in ED (log-rank test p=0.016). Antibiotics administered in ED had hazard ratio of 0.178 (95% CI 0.053 to 0.595; p=0.005) in the Cox Proportional hazard regression model with adjustment of covariates. Age (adjusted odds ratio 1.06, 95% CI 1.01 to 1.12, p=0.033) and initial hypotension (adjusted odds ratio 0.97, 95% CI 0.95 to 0.99, p=0.005) were significant predictors of mortality. Conclusion A dedicated guideline for severe sepsis management could improve blood culture rate, early antibiotics administration in the emergency department. Patients received early antibiotic had better outcome and survival.
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Abstract
Computed radiography offers many advantages over the conventional radiography. With new technological breakthroughs and the development of systems that are more cost-effective, there has been an increase in its use in the recent years. However, like all imaging modalities, one must be aware of the various artifacts that are likely to lead to misdiagnosis. In this article, we illustrate the potential hardware and software artifacts that are associated with its use.
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Shek KC, Lo CM, Ong KL, Kam CW. Spontaneous Pneumomediastinum: An Uncommon Complication from an Augmented Physiological Belching (Imitating a TV Show Game). HONG KONG J EMERG ME 2017. [DOI: 10.1177/102490790501200201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Noisy belching in front of other people, often considered to be an impolite manner, may not be as harmless as it seems. We report on a patient who had spontaneous pneumomediastinum after intentional induction of noisy belching by rapid excessive intake of carbonated drinks (imitating the game played in a popular local television program “The Super Trio Continues…”). The clinical features, investigations and management of spontaneous pneumomediastinum are discussed.
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Tan LTH, Ong KL. Painful Malignant Embryonal Carcinoma of the Testis. HONG KONG J EMERG ME 2017. [DOI: 10.1177/102490790601300309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Patients with clinically palpable testicular nodule, regardless of absence or accompanying symptom of pain, require further evaluation. Testicular carcinoma including embryonal carcinoma has varied appearances and the diagnosis can be difficult unless there is presence of local infiltration or distant metastatic deposits. Ultrasound examination is the imaging modality of choice to quickly confirm the clinical findings of testicular mass at the Emergency Department and distinguish a testicular mass from an extra-testicular mass and extent of the disease. Despite presentations in varying stages of disease, the treatment will include orchiectomy.
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Tan LTH, Ong KL. Sudden Onset of Calf Pain. HONG KONG J EMERG ME 2017. [DOI: 10.1177/102490790601300203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Avulsion of the myo-tendinous junction of the medial head of the gastrocnemius muscle is commonly associated with strenuous physical activities such as racquet sports, skiing, and running. The injury is painful, distressing and can be disabling. Ready availability makes ultrasound study the imaging modality of choice in the emergency department.
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Abstract
Benign intratesticular lesions such as epidermoid cyst are rare, but recognition is important to avoid unnecessary surgical intervention (orchiectomy). The combination of ultrasonographic findings and negative tumour markers can help differentiate benign from malignant intratesticular lesions. At surgery, the lesion can be enucleated and frozen sections obtained to confirm the diagnosis, thus avoiding the need for orchiectomy.
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Jung IH, Kurnicka K, Enache R, Nagy AI, Martins E, Cereda A, Vitiello G, Magda SL, Styczynski G, Lo Iudice F, De Barros Viegas H, Shahab F, Trunina I, Mata Caballero R, De Barros Viegas H, Marques A, Shimoni S, Generati G, Generati G, Bendix Salkvist Jorgensen T, Chen TE, Andrianova A, Fernandez-Golfin C, Corneli MC, Ali M, Seo HS, Kim MJ, Lichodziejewska B, Goliszek S, Dzikowska-Diduch O, Zdonczyk O, Kozlowska M, Kostrubiec M, Ciurzynski M, Palczewski P, Pruszczyk P, Popa E, Coman IM, Badea R, Platon P, Calin A, Beladan CC, Rosca M, Ginghina C, Popescu BA, Jurcut R, Venkateshvaran AI, Sola SC, Govind SC, Dash PK, Lund L, Manouras AI, Merkely B, Magne J, Aboyans V, Boulogne C, Lavergne D, Jaccard A, Mohty D, Casadei F, Spano F, Santambrogio G, Musca F, Belli O, De Chiara B, Bokor D, Giannattasio C, Corradi E, Colombo CA, Moreo A, Vicario ML, Castellani S, Cammelli D, Gallini C, Needleman L, Cruz BK, Maggi E, Marchionni N, Bratu VD, Mincu RI, Mihai CM, Gherghe AM, Florescu M, Cinteza M, Vinereanu D, Sobieraj P, Bielicki P, Krenke R, Szmigielski CA, Petitto M, Ferrone M, Esposito R, Vaccaro A, Buonauro A, Trimarco B, Galderisi M, Mendes L, Dores H, Melo I, Madeira V, Patinha J, Encarnacao C, Ferreia Santos J, Habib F, Soesanto AM, Sedyawan J, Abdurrazak G, Sharykin A, Popova NE, Karelina EV, Telezhnikova ND, Hernandez Jimenez V, Saavedra J, Molina L, Alberca MT, Gorriz J, L Pais J, Pavon I, Navea C, Alonso JJ, Mendes L, Sonia S, Madeira V, Encarnacao C, Patinha J, Melo I, Ferreia Santos J, Cruz I, Joao I, Gomes AC, Caldeira D, Lopes L, Fazendas P, Pereira H, Edri O, Edri O, Schneider N, Schneider N, Abaye N, Abaye N, Goerge J, Goerge J, Gandelman G, Gandelman G, Bandera F, Alfonzetti E, Guazzi M, Bandera F, Villani S, Ferraro O, Alfonzetti E, Guazzi M, Ramberg E, Bhardwaj P, Nepper ML, Binko TS, Olausson M, Fink-Jensen T, Andersen AM, Roland J, Gleerup Fornitz G, Ong K, Suri RM, Enrique-Sarano M, Michelena HI, Burkhart HM, Gillespie SM, Cha S, Mankad SV, Saidova MA, Bolotova MN, Salido Tahoces L, Izurieta C, Villareal G, Esteban A, Urena Vacas A, Ayala A, Jimenez Nacher JJ, Hinojar Baydes R, Gonzalez Gomez A, Garcia A, Mestre JL, Hernandez Antolin R, Zamorano Gomez JJ, Perea G, Covelli Y, Henquin R, Ronderos R, Hepinstall MJ, Cassidy CS, Pellikka PA, Pislaru SV, Kane G. P569Diastolic dyssynchrony is associated with exercise intolerance in hypertensive patients with left ventricular hypertrophyP570Echocardiographic pattern of acute pulmonary embolism, analysis of consecutive 511 patientsP571Clinical significance of ventricular interdependence and left ventricular function in patients with pulmonary hypertension receiving specific vasodilator therapyP572Haemodynamic characteristics and ventricular mechanics in post-capillary and combined pre- and post-capillary pulmonary hypertensionP573Relationship between hematological response and echocardiographic features in patients with light chains systemic amyloidosisP574Myocardial changes in patients with anorexia nervosaP575Giant cell arteritis presenting as fever of unknown origin: role of clinical history, early positron emission tomography and ultrasound screeningP576Subclinical systolic dysfunction in systemic sclerosis is not influenced by standard rheumatologic therapy - a 4D echocardiographic studyP577Cardiac index correlates with the degree of hepatic steathosis in obese patients with obstructive sleep apneaP578Myocardial mechanics in top-level endurance athletes: a three-dimensional speckle tracking studyP579The athlete heart: what happens to myocardial deformation in physiological adaptation to sportsP580Association between left ventricle intrinsic function and urine protein-creatinine ratio in preeclampsia before and after deliveryP581Dilatation of the aorta in children with bicuspid aortic valveP582Cardiovascular functional abnormalities in patients with osteogenesis imperfectaP583Dobutamine stress test fast protocol: diagnostic accuracy and securityP584Prognostic value of non-positive exercise echocardiography in the patients submitted to percutaneous coronary interventionP585The use of myocardial strain imaging in the detection of coronary artery disease during stress echocardiographyP586Preserved O2 extraction exercise response in heart failure patients with chronotropic insufficiency: evidence for a central cardiac rather than peripheral oxygen uptake limitationP587Major determinant of O2 artero-venous difference at peak exercise in heart failure and healthy subjectsP588Stress echocardiography with contrast perfusion analysis for a more sensitive test for ischemic heart diseaseP589Assessment of mitral annular physiology in myxomatous mitral disease with 3D transesophageal echocardiography: comparison between early severe mitral regurgitation and decompensated groupP590Three-dimensional transesophageal echocardiographic assessment of the mitral valve geometry in patients with mild, moderate and severe chronic ischemic mitral regurgitationP591Left atrial appendage closure. Multimodality imaging in device size selectionP592Contributions of three-dimensional transesophageal echocardiography in the evaluation of aortic atherosclerotic plaquesP593Agitated blood-saline is superior to agitated air-saline for echocardiographic shunt studies. Eur Heart J Cardiovasc Imaging 2016; 17:ii102-ii109. [DOI: 10.1093/ehjci/jew248.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Ong KL, Morris MJ, McClelland RL, Maniam J, Allison MA, Rye KA. Lipids, lipoprotein distribution and depressive symptoms: the Multi-Ethnic Study of Atherosclerosis. Transl Psychiatry 2016; 6:e962. [PMID: 27898070 PMCID: PMC5290355 DOI: 10.1038/tp.2016.232] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 09/12/2016] [Accepted: 10/04/2016] [Indexed: 12/28/2022] Open
Abstract
Previous studies suggest lower concentrations of total and high-density lipoprotein (HDL) cholesterol to be predictive of depression. We therefore investigated the relationship of lipids and lipoprotein distribution with elevated depressive symptoms (EDS) in healthy men and women from the Multi-Ethnic Study of Atherosclerosis (MESA). Participants were followed up over a 9.5-year period. EDS were defined as a Center for Epidemiological Studies Depression (CES-D) score ⩾16 and/or use of antidepressant drugs. Lipoprotein distribution was determined from plasma using nuclear magnetic resonance spectroscopy. Among 4938 MESA participants (mean age=62 years) without EDS at baseline, 1178 (23.9%) developed EDS during follow-up. In multivariable Cox regression analyses, lower total, low-density lipoprotein (LDL) and non-HDL cholesterol concentrations at baseline were associated with incident EDS over 9.5 years (hazards ratio (HR)=1.11-1.12 per s.d. decrease, all P<0.01), after adjusting for demographic factors, traditional risk factors including LDL cholesterol, HDL cholesterol and triglycerides. Lipoprotein particle subclasses and sizes were not associated with incident EDS. Among participants without EDS at both baseline and visit 3, a smaller increase in total or non-HDL cholesterol between these visits was associated with lower risk of incident EDS after visit 3 (HR=0.88-0.90 per s.d. decrease, P<0.05). Lower baseline concentrations of total, LDL and non-HDL cholesterol were significantly associated with a higher risk of incident EDS. However, a short-term increase in cholesterol concentrations did not help to reduce the risk of EDS. Further studies are needed to replicate our findings in cohorts with younger participants.
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Ong K, Svitkina T, Bi E. Visualization of in vivo septin ultrastructures by platinum replica electron microscopy. Methods Cell Biol 2016; 136:73-97. [PMID: 27473904 DOI: 10.1016/bs.mcb.2016.03.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Septins are cytoskeletal proteins involved in diverse biological processes including cytokinesis, cell morphogenesis, motility, and ciliogenesis. Septins form various filamentous structures in vitro and in vivo, but the higher-order architecture of septin structures in vivo remains poorly defined. The best understood system in this respect is the budding yeast Saccharomyces cerevisiae, where septins form a ring structure that undergoes multiple stages of remodeling during the cell cycle. In this chapter, we describe a method for visualizing supramolecular septin structures in yeast at high spatial resolution using platinum replica electron microscopy. This approach can be applied to further understand the regulation of assembly and remodeling of septin higher-order structures, as well as the relationship between septin architecture and function.
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Wong YK, Lui CT, Li KK, Wong CY, Lee MM, Tong WL, Ong KL, Tang SYH. Prediction of en-route complications during interfacility transport by outcome predictive scores in ED. Am J Emerg Med 2016; 34:877-82. [PMID: 26947612 DOI: 10.1016/j.ajem.2016.02.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Accepted: 02/06/2016] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVE The objective was to determine the accuracy of the outcome predictive scores (Modified Early Warning Score [MEWS]; Hypotension, Low Oxygen Saturation, Low Temperature, Abnormal ECG, Loss of Independence [HOTEL] score; and Simple Clinical Score [SCS]) in predicting en-route complications during interfacility transport (IFT) in emergency department. DESIGN This was a retrospective cohort study. METHODS All IFT cases by ambulances with either nurse-led or physician-led escort, occurring between 1 January 2011 and 31 December 2012, were included. Obstetric and pediatric cases (age < 18 years) were excluded. The condition of patients was quantified by using the predictive scores (MEWS, HOTEL, and SCS) at triage station and on ambulance departure. The accuracy of predictive scores was compared by the receiver operating characteristic (ROC) curves. RESULTS A total of 659 cases were included. Seventeen cases had en-route complications (2.6%). The complication rate in physician-escorted transport (2.2%) was similar to that in nurse-escorted transport (2.6%). None of the 57 intubated cases had en-route complications. The area under the ROC curve for MEWS was 0.662 (triage) and 0.479 (departure). The accuracy of MEWS at triage was better than that at departure (P = .049). The area under the ROC curve for HOTEL was 0.613 (triage) and 0.597 (departure), and that for SCS was 0.6 (triage) and 0.568 (departure). In general, the predictive scores at triage were better than those on departure. CONCLUSION None of the scores had good accuracy in prediction of en-route complications during IFT. MEWS at triage was among the best one already but was not ideal.
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Ong K, Fong S, Tay G. A prognostic indicator in rectal cancer surgery: Lymph node ratio in neo-adjuvant chemo-radiotherapy (CRTX). Int J Surg 2015. [DOI: 10.1016/j.ijsu.2015.07.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Cheung C, Taylor C, Kaila K, Tang J, Alipour S, Grunau B, Deyell M, Barbic D, Habibi M, Roston T, Ong K, Kiamanesh O, Christenson J, Farkouh M, Ramanathan K. DOES ST DEPRESSION PREDICT CORONARY OCCLUSION AFTER AN OUT-OF-HOSPITAL CARDIAC ARREST? Can J Cardiol 2015. [DOI: 10.1016/j.cjca.2015.07.217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Selby L, Rootsey T, Williams R, Ong K, McShane D. P194 Prevalence Of Undiagnosed Pre-diabetes And Diabetes In A Uk Cohort Of Young People With Cystic Fibrosis. Thorax 2014. [DOI: 10.1136/thoraxjnl-2014-206260.323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Selby L, Rootsey T, Williams R, Ong K, McShane D. P193 Longitudinal Associations Between Fev1 And Hba1c In A Uk Cohort Of Young People With Cystic Fibrosis. Thorax 2014. [DOI: 10.1136/thoraxjnl-2014-206260.322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Bann D, Ong K, Kuh D, Lashen H, Keevil B, Wu FC, Holly JMP, Ben-Shlomo Y. OP13 Socio-economic inequalities in components of the neuroendocrine system (insulin-like growth factor-I and testosterone) among older adults: findings from the 1946 British Birth Cohort Study. Br J Soc Med 2014. [DOI: 10.1136/jech-2014-204726.16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Cheung CYY, Hui EYL, Cheung BMY, Woo YC, Xu A, Fong CHY, Ong KL, Yeung CY, Janus ED, Tse HF, Sham PC, Lam KSL. Adiponectin gene variants and the risk of coronary heart disease: a 16-year longitudinal study. Eur J Endocrinol 2014; 171:107-15. [PMID: 24760538 DOI: 10.1530/eje-14-0079] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
OBJECTIVE Circulating adiponectin levels have been shown to be associated with a risk of coronary heart disease (CHD). However, its primary role in protecting against the development of CHD remains controversial due to conflicting observations in prospective studies. To gain further insight into the primary role of adiponectin, our major objective was to investigate the relationship between single nucleotide polymorphisms (SNPs) of the adiponectin gene (ADIPOQ) and incident CHD in a population-based cohort with no CHD at baseline. DESIGN AND METHODS We conducted a 16-year longitudinal study in 2196 subjects from the Hong Kong Cardiovascular Risk Factor Prevalence Study (CRISPS). During 33 862 person-years of follow-up, 184 subjects developed CHD (cumulative incidence rate=5.4 per 1000 person-years). Nine ADIPOQ SNPs with potential functional relevance or shown to be associated with adiponectin levels and/or CHD were genotyped. RESULTS Among the nine ADIPOQ SNPs, +276G>T (rs1501299) was independently associated with incident CHD in men but not in women, even after adjustments for traditional cardiovascular risk factors (Padjusted=5.5×10(-3) to 0.023; hazard ratio=1.39-1.54). Furthermore, there was a significant association of the T allele of +276G>T with a lower adiponectin level (P=0.027; β (95% CI)=-0.05 (-0.10, -0.01). CONCLUSIONS This study demonstrated that +276G>T may be an independent predictor of CHD development. Our findings suggest that low adiponectin levels, as may be influenced by +276G>T, confer a higher risk of CHD, in keeping with a role of hypoadiponectinaemia in the development of CHD in the general population.
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Coughlan C, Ledger W, Wang Q, Liu F, Demirol A, Gurgan T, Cutting R, Ong K, Sallam H, Li T. Recurrent implantation failure: definition and management. Reprod Biomed Online 2014; 28:14-38. [DOI: 10.1016/j.rbmo.2013.08.011] [Citation(s) in RCA: 331] [Impact Index Per Article: 33.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Revised: 05/05/2013] [Accepted: 08/06/2013] [Indexed: 12/29/2022]
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Giesbrecht M, McCarthy M, Elliott ML, Ong KL. First Report of Fusarium oxysporum f. sp. palmarum in Texas Causing Fusarium Wilt of Washingtonia robusta. PLANT DISEASE 2013; 97:1511. [PMID: 30708476 DOI: 10.1094/pdis-05-13-0488-pdn] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Fusarium wilt of palms occurs worldwide, caused by different Fusarium oxysporum ff. spp. including F. oxysporum f. sp. elaeidis, F. oxysporum f. sp. canariensis, and F. oxysporum f. sp. albedinis (3). Prior to 2010, F. oxysporum f. sp. canariensis was the only palm infecting species known to occur in the United States. In 2010, isolates of F. oxysporum were reported from dying Syagrus romanzoffiana and Washingtonia robusta in Florida. Based on morphological and molecular data, as well as the unique host species affected by the pathogen, this fungus was determined to be a new forma specialis of F. oxysporum, designated f. sp. palmarum (1). The pathogen infects foliar tissue, causing complete necrosis of the crown and leading to tree death within 2 to 3 months. In June 2012, the Texas Plant Disease Diagnostic Laboratory (TPDDL) received a plant sample from a dying W. robusta palm, exhibiting reddish-brown stripes on the petiole with chlorotic and necrotic leaves, from an established palm in the landscape from Harris County, Texas. Fungal cultures were obtained from symptomatic foliar tissue and identified as F. oxysporum based on morphology. Microconidia were oval to reniform, 1- to 2-septate, measuring 5 to 18 × 2.5 to 5 μm. Phialides were short with microconidia produced in false heads. Macroconidia were curved and slender with a foot-shaped basal cell, usually 3-septate, and 22 to 37 × 2.5 to 5 μm. Chlamydospores were roundish and ranged from 7 to 13 μm in diameter. Fungal colonies had white to purple mycelia when grown on potato dextrose agar. DNA from a single spore culture was extracted, amplified by PCR using primers corresponding to a segment of the translation elongation factor 1α (EF-1α) gene, and the PCR product sequenced (2). Using the sequence alignment tool (BLASTn) in GenBank, the TPDDL's sequence (GenBank Accession No. KC897693) was aligned with EF-1α regions from F. oxysporum f. sp. palmarum isolates previously entered into the database ([1]; accessions GQ154455[=NRRL53544] and GQ154456[=NRRL46589]), revealing 100% homology between the isolates. Based on host source and sequence similarity, the fungus was tentatively identified as F. oxysporum f. sp. palmarum. Pathogenicity tests were performed on three leaf seedlings of W. robusta and W. filifera. Fifteen plants of each species were inoculated with the suspect isolate (designated KB2012) and 10 control plants were mock-inoculated as described by (1). Plants were grown in a greenhouse for 8 weeks post-inoculation. During this time, 83% of inoculated plants developed foliar lesions and died or severely declined, and all control plants remained healthy. F. oxysporum was recovered in culture from 100% of the symptomatic plants. DNA was extracted from fungal cultures, and EF-1α was amplified by PCR and sequenced, as described above. The amplicon was determined to share 100% homology with known F. oxysporum f. sp. palmarum isolates, confirming this fungus as the cause of disease in W. robusta. This is the first report of this pathogen in Texas, as well as the first report outside of Florida. This is also the first documentation of W. filifera as a host of this pathogen. References: (1) M. L. Elliott et al. Plant Dis. 94:31, 2010. (2) D. M. Geiser et al. Eur. J. Plant Pathol. 110:473, 2004. (3) G. W. Simone. Pages 17-19 in: Compendium of Ornamental Palm Diseases and Disorders, M. L. Elliott et al., eds. The American Phytopathological Society, St. Paul, MN, 2004.
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Tun NM, Villani G, Ong K, Yoe L, Bo ZM. Risk of having BRCA1 mutation in high-risk women with triple-negative breast cancer: a meta-analysis. Clin Genet 2013; 85:43-8. [DOI: 10.1111/cge.12270] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Revised: 08/30/2013] [Accepted: 08/30/2013] [Indexed: 01/15/2023]
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Chausiaux O, Ganyani R, Morris S, Baker S, Hayes J, Long C, Williams G, Husheer S, Pinola P, Morin-Papunen L, Dunger DB, Ong K, Bloigu A, Pouta A, Jarvelin MR, Franks S, Tapanainen JS, Lashen H, Anderson E, Fraser A, McNally W, Sattar N, Lashen H, Fleming R, Nelson SM, Lawlor DA, de Kat AC, Yarde F, Gremmels H, Verhaar MC, Broekmans FJ, Fraser A, McNally W, Sattar N, Anderson E, Lashen H, Fleming R, Lawlor DA, Nelson SM. Session 17: Promises of AMH. Hum Reprod 2013. [DOI: 10.1093/humrep/det144] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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