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Shigematsu M, Nagano Y, Millar BC, Kenny F, Lowery CJ, Xiao L, Rao JR, Nicholson V, Watabe M, Heaney N, Sunnotel O, McCorry K, Rooney PJ, Snelling W, Dooley JSG, Elborn JS, Matsuda M, Moore JE. Molecular detection and identification of Cryptosporidium species in lettuce employing nested small-subunit rRNA PCR and direct automated sequencing. Br J Biomed Sci 2007; 64:133-5. [PMID: 17910286 DOI: 10.1080/09674845.2007.11978102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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152
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Green AG, Moore JE, Sondhi SL, Vishwanath A. Current noise in the vicinity of the 2D superconductor-insulator quantum critical point. PHYSICAL REVIEW LETTERS 2006; 97:227003. [PMID: 17155833 DOI: 10.1103/physrevlett.97.227003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2006] [Revised: 09/01/2006] [Indexed: 05/12/2023]
Abstract
Systems near to quantum critical points show universal scaling in response to external probes. We consider whether this scaling is reflected in their out-of-equilibrium fluctuations. We study current noise in the metallic state at the z=1 quantum critical point between a superconductor and an insulator in two dimensions. Using a Boltzmann-Langevin approach within a 1/N expansion, we show that the current noise obeys a universal scaling form S_{j}=TPhi[T/T_{eff}(E)], with T_{eff} proportional, variantsqrt[E]. This treatment recovers Johnson noise in thermal equilibrium and S_{j} proportional, variantsqrt[E] at strong electric fields. The latter differs significantly from both the shot noise in conventional metals (diffusive Fermi liquids) and the free carrier result, due to strong correlations between the critical bosonic excitations. Current-noise measurements could therefore help clarify the physics of the destruction of superconductivity in thin film superconductors.
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Sunnotel O, Snelling WJ, Xiao L, Moule K, Moore JE, Millar BC, Dooley JSG, Lowery CJ. Rapid and sensitive detection of single cryptosporidium oocysts from archived glass slides. J Clin Microbiol 2006; 44:3285-91. [PMID: 16954262 PMCID: PMC1594691 DOI: 10.1128/jcm.00541-06] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In this study we report on the development and application of a novel method for efficiently extracting and detecting single Cryptosporidium oocysts from archived glass slides. Laser capture microscopy was used to extract low numbers of oocysts from archived glass slides. Highly sensitive real-time PCR methods were then developed to enable the rapid detection and identification of Cryptosporidium oocysts from these samples. The method was applied to fecal smears stained with a variety of standard oocyst stains and water samples. This application, with samples derived from both public health and water service laboratories, highlighted the strong potential of this method to be used as a rapid high-throughput screening tool for the routine monitoring of Cryptosporidium and other medically important pathogens from clinical, veterinary, and environmental water samples. Importantly, the application of our protocol could be used to type Cryptosporidium and other pathogens from stored archived glass slides in public health and water service laboratories, providing vital epidemiological updates and helping to identify and trace pathogens and their routes of infection and ultimately improve their control.
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O'Gorman K, Xu J, Elborn JS, Boyle L, Millar BC, Goldsmith CE, Moore JE. Bacterial contaminants in cosmetic products from a patient with cystic fibrosis. Br J Biomed Sci 2006; 63:141-2. [PMID: 17058716 DOI: 10.1080/09674845.2006.11978090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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155
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Gillow C, Shaw A, Moore JE, Elborn JS, Murphy PG. Antibiotic resistance and identification of uncommon Gram-negative bacteria isolated from sputum of adult patients with cystic fibrosis. Br J Biomed Sci 2006; 63:22-5. [PMID: 16613138 DOI: 10.1080/09674845.2006.11978085] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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156
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Mukerjee S, Xu C, Moore JE. Topological defects and the superfluid transition of the s=1 spinor condensate in two dimensions. PHYSICAL REVIEW LETTERS 2006; 97:120406. [PMID: 17025945 DOI: 10.1103/physrevlett.97.120406] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2006] [Indexed: 05/12/2023]
Abstract
The s=1 spinor Bose condensate at zero temperature supports ferromagnetic and polar phases that combine magnetic and superfluid ordering. We analyze the topological defects of the polar condensate, correcting previous studies, and show that the polar condensate in two dimensions is unstable at any finite temperature; instead, there is a nematic or paired superfluid phase with algebraic order in exp(2itheta), where theta is the superfluid phase, and no magnetic order. The Kosterlitz-Thouless transition out of this phase is driven by unbinding of half-vortices (the spin-disordered version of the combined spin and phase defects found by Zhou), and the anomalous universal 8T(c)/pi stiffness jump at the transition is confirmed in numerical simulations. The anomalous stiffness jump is a clear experimental signature of this phase and the corresponding phase transition.
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Xu J, Smyth CL, Buchanan JA, Dolan A, Rooney PJ, Millar BC, Goldsmith CE, Elborn JS, Moore JE. Employment of 16 S rDNA gene sequencing techniques to identify culturable environmental eubacteria in a tertiary referral hospital. J Hosp Infect 2006; 57:52-8. [PMID: 15142716 DOI: 10.1016/j.jhin.2004.01.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2003] [Accepted: 01/07/2004] [Indexed: 11/26/2022]
Abstract
Universal or 'broad-range' eubacterial polymerase chain reaction (PCR) was performed on 53 isolates from environmental water-associated sites in a haematology unit (N = 22) and the outer surfaces of cleaning lotion containers sited throughout a tertiary referral hospital (N = 31) 16 S rDNA PCR was performed using two sets of universal primers, including the novel reverse primer, XB4, to generate a composite amplicon of 1068 bp, which was sequenced to obtain each isolate's identity. Sequence analysis was able to identify 51 isolates. Most (75% from the haematology unit and 81% from cleaner containers) were Gram-positive. Nine different genera were identified from the haematology unit and 13 from the cleaning lotion containers. This study provides the first reports of Terrabacter spp. and Brachybacterium paraconglomeratum isolated from a hospital environment. As unusual and difficult-to-identify environmental organisms are unlikely to be clinically significant, and molecular identification is costly and labour-intensive, we recommend that molecular methods are only used as an adjunct to first-line phenotypic identification schemes where a definitive identification is required. Where molecular identification methods are justified, partial 16 S rDNA PCR and sequencing employing the novel universal primer XB4, is a valuable and reliable technique.
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Sunnotel O, Lowery CJ, Moore JE, Dooley JSG, Xiao L, Millar BC, Rooney PJ, Snelling WJ. Cryptosporidium. Lett Appl Microbiol 2006; 43:7-16. [PMID: 16834714 DOI: 10.1111/j.1472-765x.2006.01936.x] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
This review discusses characteristics of the genus Cryptosporidium and addresses the pathogenesis, reservoirs, public health significance and current applications for the detection and typing of this important pathogen. By increasing knowledge in key areas of Cryptosporidium research such as aetiology, epidemiology, transmission and host interactions, the numbers of cases of human cryptosporidiosis should be reduced.
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Arno G, Kaski JC, Smith DA, Akiyu J, Zal B, Millar BC, Moore JE, Baboonian C. Detection of Chlamydia pneumoniae in atherosclerotic tissue: a comparative study of PCR and immunocytochemistry. Br J Biomed Sci 2006; 62:155-60. [PMID: 16411373 DOI: 10.1080/09674845.2005.11732703] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The reported prevalence of Chlamydia pneumoniae in atherosclerotic tissue appears to depend on the detection system used. This introduces problems in determining the role of C. pneumoniae in atherosclerosis. This study analyses the sensitivity and performance of molecular diagnostic methods for the detection of C. pneumoniae and polymerase chain reaction (PCR) inhibitors in atheromatous tissue. Atherosclerotic tissue taken from 30 coronary endarterectomies, nine coronary arteries from explanted hearts, 16 carotid and two femoral endarterectomies are studied. Nested PCR (nPCR) assays targeting the PstI restriction fragment, the OmpA gene and the CRP operon of the chlamydial genome and immunocytochemistry (ICC) are used. Internal controls (IC) are constructed to co-amplify with the specific amplicons and identify the presence of inhibitor. The OmpA, PstI and CRP operon PCR assays had similar analytical sensitivities. However, the OmpA PCR was most affected by PCR inhibitors. Despite this, eight samples (14%) tested positive in the OmpA nPCR and no positives were found using the PstI or CRP operon nPCRs. Primary isolates of C. pneumoniae obtained from 12 patients with acute respiratory infection were positive in all three assays. Of the 48 specimens available for ICC, 33 (69%) were positive for chlamydial antigens. These included samples found positive by PCR. Dilution of samples to eliminate PCR inhibitors may have contributed to the discordant ICC and PCR results. The OmpA PCR, when used with an IC to identify samples with PCR inhibitors, is a reliable tool. However, the sensitivity of the ICC methods justifies their continued use.
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Kagawa S, Nagano Y, Tazumi A, Murayama O, Millar BC, Moore JE, Matsuda M. Nucleotide Sequencing and Analysis of 16S rDNA and 16S-23S rDNA Internal Spacer Region (ISR) of Taylorella equigenitalis, as an Important Pathogen for Contagious Equine Metritis (CEM). Vet Res Commun 2006; 30:343-55. [PMID: 16502103 DOI: 10.1007/s11259-006-3304-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/01/2004] [Indexed: 10/25/2022]
Abstract
The primer set for 16S rDNA amplified an amplicon of about 1500 bp in length for three strains of Taylorella equigenitalis (NCTC11184(T), Kentucky188 and EQ59). Sequence differences of the 16S rDNA among the six sequences, including three reference sequences, occurred at only a few nucleotide positions and thus, an extremely high sequence similarity of the 16S rDNA was first demonstrated among the six sequences. In addition, the primer set for 16S-23S rDNA internal spacer region (ISR) amplified two amplicons about 1300 bp and 1200 bp in length for the three strains. The ISRs were estimated to be about 920 bp in length for large ISR-A and about 830 bp for small ISR-B. Sequence alignment of the ISR-A and ISR-B demonstrated about 10 base differences between NCTC11184(T) and EQ59 and between Kentucky188 and EQ59. However, only minor sequence differences were demonstrated between the ISR-A and ISR-B from NCTC11184(T) and Kentucky188, respectively. A typical order of the intercistronic tRNAs with the 29 nucleotide spacer of 5'-16S rDNA-tRNA(Ile)-tRNA(Ala)-23S rDNA-3' was demonstrated in the all ISRs. The ISRs may be useful for the discrimination amongst isolates of T. equigenitalis if sequencing is employed.
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Gondo T, Sekizuka T, Manaka N, Murayama O, Millar BC, Moore JE, Matsuda M. Demonstration of the shorter flagellin (flaA) gene of urease-positive thermophilicCampylobacter isolated from the natural environment in Northern Ireland. Folia Microbiol (Praha) 2006; 51:183-90. [PMID: 17004648 DOI: 10.1007/bf02932120] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The PCR amplicons (about 1450 bp in length) of flaA gene fragments of 11 isolates of urease-positive thermophilic Campylobacter (UPTC) isolated from the natural environment not including wild birds in Northern Ireland were demonstrated to be shorter than those of C. jejuni 81116 and six isolates of C. jejuni and C. coli (about 1700 bp) isolated in Northern Ireland and Japan. When the nucleotide lengths of the possible open reading frame (ORF) of the flaA genes were determined, those from the 11 UPTC isolates were estimated to be 1464-1503 bp, and those from the six C. jejuni and C. coli isolates and C. jejuni 81116 strain to be 1716-1728 bp. Nucleotide sequence and deduced amino acid sequence alignments of the possible ORFs demonstrated that the ORFs from the 11 UPTC isolates lack about 80 amino acid residues, mainly from the approximate residue numbers 390-470 of the large variable region in the flaA protein of the seven isolates of C. jejuni and C. coli, and do not have any internal termination codons. High amino acid sequence similarity of both amino- and carboxy-termini of the ORFs of the flaA gene was demonstrated between the 11 isolates of UPTC and the 7 isolates of C. jejuni and C. coli. The 11 UPTC isolates examined were strongly suggested to possess a shorter flaA gene without any internal termination codons.
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162
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McGill K, Cowley D, Moran L, Scates P, O'Leary A, Madden RH, Carroll C, McNamara E, Moore JE, Fanning S, Collins JD, Whyte P. Antibiotic resistance of retail food and human Campylobacter isolates on the island of Ireland from 2001-2002. Epidemiol Infect 2006; 134:1282-91. [PMID: 16623987 PMCID: PMC2870507 DOI: 10.1017/s0950268806006200] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/23/2006] [Indexed: 11/05/2022] Open
Abstract
The antimicrobial resistance profiles of Campylobacter isolates recovered from a range of retail food samples (n=374) and humans (n=314) to eight antimicrobial compounds were investigated. High levels of resistance in food C. jejuni isolates were observed for ceftiofur (58%), ampicillin (25%) and nalidixic acid (17%) with lower levels observed for streptomycin (7.9%) and chloramphenicol (8.3%). A total of 80% of human C. jejuni isolates were resistant to ceftiofur, while 17% showed resistance to ampicillin and nalidixic acid, 8.6% to streptomycin and 4.1% to chloramphenicol. Resistance to clinically relevant antimicrobials such as erythromycin, ciprofloxacin and tetracycline was 6.7, 12, and 15% respectively for all food isolates and was similar to corresponding resistance prevalences observed for human isolates, where 6.4, 12 and 13% respectively were found to be resistant. Comparisons of C. jejuni isolates in each location showed a high degree of similarity although some regional variations did exist. Comparison of total C. jejuni and C. coli populations showed minor differences, with C. jejuni isolates more resistant to ampicillin and ceftiofur. Multidrug resistance patterns showed some profiles common to human and clinical isolates.
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163
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Moore JE, Xu J, Millar BC. Analysis of 16S-23S intergenic spacer regions of the rRNA operons in Tsukamurella pulmonis. Br J Biomed Sci 2006; 63:25-6. [PMID: 16613139 DOI: 10.1080/09674845.2006.11978086] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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164
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Smyth M, Moore JE, McClurg RB, Goldsmith CE. Quantitative colorimetric measurement of residual antimicrobials in the urine of patients with suspected urinary tract infection. Br J Biomed Sci 2006; 62:114-9. [PMID: 16196456 DOI: 10.1080/09674845.2005.11732696] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
A simple microtitre plate assay is used to detect antimicrobial activity in clinical urine specimens and its potential as a screening tool is assessed. The assay is based on a colorimetric substrate, p-nitrophenyl-beta-D-glucopyranoside, in combination with a Bacillus subtilis strain to detect antimicrobial residues. The assay identified antimicrobial activity in 31% of the 527 clinical urine samples tested. The majority of the samples (65%) came from the community, with the rest comprising hospital inpatients (19%) and out-patients (16%). The results demonstrated that there is an association between gender and the presence of inhibitory substances, as 40% of males and 27% of females tested positive. Just over two-fifths of hospital patients (46%) tested positive for inhibitory substances, compared to 26% of samples from community patients. Of the 306 samples that were culture-negative (<10(4) bacteria/mL), 42% were positive for inhibitory substances, compared with 17% among the remaining 221 samples. However, there was no evidence of an association between age and the presence of inhibitory substances. This study demonstrates that the bacteriostatic effect of the bacterial preservative boric acid is sufficient to upset the specificity of the assay. Furthermore, it has been suggested that antimicrobial activity can confuse the interpretation of culture results, as they have been found to play a major role in the occurrence of apparently sterile pyuria.
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165
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Matsuda M, Tazumi A, Kagawa S, Sekizuka T, Murayama O, Moore JE, Millar BC. Homogeneity of the 16S rDNA sequence among geographically disparate isolates of Taylorella equigenitalis. BMC Vet Res 2006; 2:1. [PMID: 16398935 PMCID: PMC1360666 DOI: 10.1186/1746-6148-2-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2005] [Accepted: 01/06/2006] [Indexed: 11/30/2022] Open
Abstract
Background At present, six accessible sequences of 16S rDNA from Taylorella equigenitalis (T. equigenitalis) are available, whose sequence differences occur at a few nucleotide positions. Thus it is important to determine these sequences from additional strains in other countries, if possible, in order to clarify any anomalies regarding 16S rDNA sequence heterogeneity. Here, we clone and sequence the approximate full-length 16S rDNA from additional strains of T. equigenitalis isolated in Japan, Australia and France and compare these sequences to the existing published sequences. Results Clarification of any anomalies regarding 16S rDNA sequence heterogeneity of T. equigenitalis was carried out. When cloning, sequencing and comparison of the approximate full-length 16S rDNA from 17 strains of T. equigenitalis isolated in Japan, Australia and France, nucleotide sequence differences were demonstrated at the six loci in the 1,469 nucleotide sequence. Moreover, 12 polymorphic sites occurred among 23 sequences of the 16S rDNA, including the six reference sequences. Conclusion High sequence similarity (99.5% or more) was observed throughout, except from nucleotide positions 138 to 501 where substitutions and deletions were noted.
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Abstract
This review describes characteristics of the genus Arcobacter. Unlike its close phenotypically related neighbour Campylobacter, Arcobacter is not currently a major public health concern, but is considered as an emerging human pathogen, and is of significance towards animal health. This review focuses on the public health significance, culturing and typing, reservoirs, and antimicrobial studies of Arcobacter. Collectively, increasing knowledge in these areas will help to develop measures, which can be used to control this emerging pathogen.
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167
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Batori H, Sekizuka T, Murayama O, Moore JE, Millar BC, Matsuda M. First isolation and molecular characterisation of a cryptic plasmid from urease-negative Campylobacter lari. Br J Biomed Sci 2005; 62:137-40. [PMID: 16196461 DOI: 10.1080/09674845.2005.11732701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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168
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Weber CP, Gedik N, Moore JE, Orenstein J, Stephens J, Awschalom DD. Observation of spin Coulomb drag in a two-dimensional electron gas. Nature 2005; 437:1330-3. [PMID: 16251958 DOI: 10.1038/nature04206] [Citation(s) in RCA: 184] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2005] [Accepted: 09/02/2005] [Indexed: 11/08/2022]
Abstract
An electron propagating through a solid carries spin angular momentum in addition to its mass and charge. Of late there has been considerable interest in developing electronic devices based on the transport of spin that offer potential advantages in dissipation, size and speed over charge-based devices. However, these advantages bring with them additional complexity. Because each electron carries a single, fixed value (- e) of charge, the electrical current carried by a gas of electrons is simply proportional to its total momentum. A fundamental consequence is that the charge current is not affected by interactions that conserve total momentum, notably collisions among the electrons themselves. In contrast, the electron's spin along a given spatial direction can take on two values, +/- [planck]/2 (conventionally upward arrow, downward arrow), so that the spin current and momentum need not be proportional. Although the transport of spin polarization is not protected by momentum conservation, it has been widely assumed that, like the charge current, spin current is unaffected by electron-electron (e-e) interactions. Here we demonstrate experimentally not only that this assumption is invalid, but also that over a broad range of temperature and electron density, the flow of spin polarization in a two-dimensional gas of electrons is controlled by the rate of e-e collisions.
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Abstract
This review describes characteristics of the family Campylobacteraceae and traits of Campylobacter jejuni. The review then focuses on the worldwide problem of C. jejuni antimicrobial resistance and mechanisms of pathogenesis and virulence. Unravelling these areas will help with the development of new therapeutic agents and ultimately decrease illness caused by this important human pathogen.
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McManus TE, Beattie D, Graham C, Moore JE, Elborn JS. Cystic fibrosis genotype and bacterial infection: a possible connection. Br J Biomed Sci 2005; 62:85-8. [PMID: 15997883 DOI: 10.1080/09674845.2005.11732691] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Patients with cystic fibrosis (CF) have repeated bacterial infection of the airways, which can lead to chronic infection. There is evidence that disease severity is determined by the genetic mutations present. This study aims to establish if CF genotype is related to the frequency and types of airway bacterial infection. Adult patients attending the regional CF unit are followed for two years and assigned to one of three groups depending on whether they are chronically infected with Burkholderia cepacia complex (BCC) organisms, Pseudomonas aeruginosa, or neither of these organisms. Genotype analysis is performed on all patients to determine which of the cystic fibrosis transmembrane regulator (CFTR) gene mutations are present. The numbers and types of organism with the CFTR mutations isolated from sputum are identified. Data are available on 59 patients: 15 colonised with BCC, 24 colonised with P. aeruginosa, and 20 not colonised with either organism. Twenty patients were homozygous for deltaF508, 25 were heterozygous, and the deltaF508 mutation was not present in the remaining 14 patients. Patients homozygous or heterozygous for the deltaF508 mutation had an increased likelihood of colonisation with BCC or P. aeruginosa, an increased number of positive sputum cultures and a higher frequency of multiple infecting organisms. Cystic fibrosis mutational analysis identified seven patients who had the R117H mutation. These patients were less likely to be colonised with BCC or P. aeruginosa. In conclusion, patients homozygous or heterozygous for the deltaF508 deletion are more likely to suffer airway colonisation with BCC or P. aeruginosa, with increased numbers of positive sputum cultures and infecting organisms. Those with the R117H mutation are less likely to be colonised by Gram-negative organisms.
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Moore JE, Shah S, Kumar V, Ainsworth JR, Page AB, McLean WHI. Follow up of patients with ocular scarring secondary to LOC syndrome treated by amniotic membrane transplantation. Br J Ophthalmol 2005; 89:939-41. [PMID: 16024838 PMCID: PMC1772765 DOI: 10.1136/bjo.2004.059121] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
AIMS To document and discuss the long term outcome of a new ophthalmic treatment for laryngo-onycho-cutaneous (LOC) syndrome. METHODS Two children were treated by excision of ocular granulation tissue and ocular surface rehabilitation with frozen amniotic membrane (AM). The clinical course of both patients was followed and documented at 2 years and 4 years following the surgery. RESULTS Patient 1 demonstrated limited recurrence of granulation tissue at 10 months. After 36 months, re-growth of granulation and scar tissue required a further three subsequent operations to the right eye in an attempt to keep the optical axis clear. 4 years postoperatively, neither eye has a clear visual axis. In contrast similar surgery for the right eye of patient 2 has been highly successful, with only very limited non-progressive recurrence after 2 years of follow up. The operation to the left eye has been similarly effective although the follow up is only 6 months. CONCLUSIONS Ocular surface rehabilitation with AM is the first partially effective treatment for the eye complications of LOC syndrome. The surprising benefit from AM may stem from the primary pathology of the condition. LOC syndrome is caused by a genetic defect resulting in an unusual N-terminal deletion of the alpha3a chain of the basement membrane protein laminin 5. One mechanism through which AM transplantation may act to reduce ocular scarring in this disease is to supplement the abnormal secreted laminin 5 with healthy transplanted laminin. Despite its initial efficacy one episode of AM treatment does not guarantee long term control of the scarring process and variations in AM graft efficacy may be related to other complicating factors such as limbal stem cell deficiency or severity of the initial scarring process.
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Abstract
Fungal endocarditis in the neonate and pediatric population is associated with a high degree of morbidity and mortality, with diagnosis in the majority of cases made postmortem. The aim of this article is to review published literature on fungal endocarditis in children and to discuss the incidence due to a wide range of fungi, primarily Aspergillus and Candida species, as well as its diagnosis, including the importance of molecular-based approaches and various treatment regimes.
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Luke CG, Koczwara B, Moore JE, Olver IN, Penniment MG, Pittman K, Price TJ, Rieger NA, Roediger BWE, Wattchow DA, Young GP, Roder DM. Treatment and Survival from Colorectal Cancer: The Experience of Patients at South Australian Teaching Hospitals Between 1980 and 2002. Clin Oncol (R Coll Radiol) 2005; 17:372-81. [PMID: 16097570 DOI: 10.1016/j.clon.2005.04.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
AIMS To evaluate trends in colorectal cancer survival and treatment at South Australian teaching hospitals and degree of adherence to treatment guidelines which recommend adjuvant chemotherapy for Dukes' C colon cancers and combined chemotherapy and radiotherapy for high-risk rectal cancers. MATERIALS AND METHODS Trends in disease specific survival and primary treatment were analysed, and comparisons drawn between diagnostic epochs, using cancer registry data from South Australian teaching hospitals. Statistical methods included univariate and multivariable disease specific survival analyses. RESULTS Five-year survival increased from 48% in 1980-1986 to 56% in 1995-2002. Largest gains were for stage C, where survivals were higher when chemotherapy was part of the primary treatment. By comparison, gains in 1-year survival were largest for stage D. Chemotherapy was provided for 4% of patients with colorectal cancers in 1980-1986, increasing to 32% in 1995-2002. Among stage C cases below 70 years at diagnosis, the proportion having chemotherapy increased to 83% in 1995-2002. The most common chemotherapy was fluorouracil (5FU) as a single agent in 1980-1986 and 5FU with leucovorin in 1995-2002. As expected, radiotherapy was used more frequently for rectal than colon cancers, and particularly for stage C. Among stage C rectal cases below 70 years, the proportion having radiotherapy increased from 10% in 1980-1986 to 57% in 1995-2002. Approximately 93% of colorectal cancers were treated surgically. Patients not treated surgically tended to be aged 80 years or more and to present with distant metastases. CONCLUSIONS Trends in chemotherapy and radiotherapy accord with evidence-based recommendations. There have been reassuring gains in survivals after adjusting for stage, grade and other prognostic indicators. The data show survival gains and treatment patterns that individual hospitals can use as benchmarks when evaluating their own experience.
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Link JM, Yager PM, Anjos JC, Bediaga I, Castromonte C, Machado AA, Magnin J, Massafferi A, de Miranda JM, Pepe IM, Polycarpo E, dos Reis AC, Carrillo S, Casimiro E, Cuautle E, Sánchez-Hernández A, Uribe C, Vázquez F, Agostino L, Cinquini L, Cumalat JP, O'Reilly B, Segoni I, Stenson K, Butler JN, Cheung HWK, Chiodini G, Gaines I, Garbincius PH, Garren LA, Gottschalk E, Kasper PH, Kreymer AE, Kutschke R, Wang M, Benussi L, Bertani M, Bianco S, Fabbri FL, Pacetti S, Zallo A, Reyes M, Cawlfield C, Kim DY, Rahimi A, Wiss J, Gardner R, Kryemadhi A, Chung YS, Kang JS, Ko BR, Kwak JW, Lee KB, Cho K, Park H, Alimonti G, Barberis S, Boschini M, Cerutti A, D'Angelo P, DiCorato M, Dini P, Edera L, Erba S, Inzani P, Leveraro F, Malvezzi S, Menasce D, Mezzadri M, Milazzo L, Moroni L, Pedrini D, Pontoglio C, Prelz F, Rovere M, Sala S, Davenport TF, Arena V, Boca G, Bonomi G, Gianini G, Liguori G, Pegna DL, Merlo MM, Pantea D, Ratti SP, Riccardi C, Vitulo P, Göbel C, Hernandez H, Lopez AM, Mendez H, Paris A, Quinones J, Ramirez JE, Zhang Y, Wilson JR, Handler T, Mitchell R, Engh D, Hosack M, Johns WE, Luiggi E, Moore JE, Nehring M, Sheldon PD, Vaandering EW, Webster M, Sheaff M. Measurement of the D(s)+ lifetime. PHYSICAL REVIEW LETTERS 2005; 95:052003. [PMID: 16090867 DOI: 10.1103/physrevlett.95.052003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2005] [Indexed: 05/03/2023]
Abstract
A high statistics measurement of the D(s)+ lifetime from the Fermilab fixed-target FOCUS photoproduction experiment is presented. We describe the analysis of the two decay modes, D(s)+ --> phi(1020)pi+ and D(s)+ -->K*(892)0K+, used for the measurement. The measured lifetime is 507.4 +/- 5.5(stat) +/- 5.1(syst) fs using 8961 +/- 105 D(s)+ --> phi(1020)pi+ and 4680 +/- 90 D(s)+ --> K*(892)0K+ decays. This is a significant improvement over the present world average.
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Millar BC, Xu J, McMullan R, Walker MJ, Hedderwick S, Moore JE. Frequency and distribution of group I intron genotypes of Candida albicans colonising critically ill patients. Br J Biomed Sci 2005; 62:24-7. [PMID: 15816208 DOI: 10.1080/09674845.2005.11732683] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
A study is performed to examine the distribution and frequency of 25S rRNA intron genotypes of Candida albicans isolated from different anatomical sites of patients in an intensive care unit (ICU) setting. Germ-tube positive Candida isolates (n=65) from 65 patients are included and isolates are characterised by 25S intron genotyping, whereby all can be subdivided into four genotypes (A-D). Results demonstrated that there were no significant differences between the frequency and genotype distribution of the Candida isolates and the anatomical site of colonisation. Furthermore, analysis of the transposable intron region in the 25S rRNA gene demonstrated equal distribution, regardless of age and anatomical site of isolation (groin, throat, etc.). Therefore, there does not appear to be any selective pressure associated with any anatomical site, resulting in an ecological shift in the frequency of genotypes present. This suggests that C. albicans intron genotypes equally colonise those sites of the body examined in this study. Although such an ecological finding as this is interesting, it perpetuates the continued need to find a genotypic typing scheme that helps to identify the source (nosocomial or endogenous) and mode of entry of C. albicans into patients in the ICU setting, resulting in C. albicans bloodstream infection.
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