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M McCann

Publications and source records attributed to M McCann.

At least 19 recordsLinked to original sources
PubMed2006

Mixed lymphovenous oedema with leg ulceration: a case study.

Necrotizing skin infections, although rare, have proven difficult to manage and treat in a wide range of patient groups. The risks of extensive tissue necrosis, systemic sepsis and potentially organ failure make this disease one which health-care professionals must be aware of. Treatment involves rapid debridement and intensive therapy including broad-spectrum antibiotics. Appropriate wound care is essential as is a great deal of psychological support for the patient and relatives. This article also highlights some of the risk factors which may pre-dispose a patient to infection.

Aged↗
PubMed2003

Changes in seasonal deaths from myocardial infarction.

BACKGROUND: Cardiovascular disease is the major contributor to excess morbidity and mortality in winter. With the rise in temperatures through global warming, and the use of central heating and air conditioning, this seasonal variation may be declining. AIM: To study possible changes in seasonal variation in case-fatality rates of myocardial infarction (MI), in men and women, over a 20-year period and compare this with possible environmental influences. DESIGN: Retrospective analysis of death certificate and climatological data. METHODS: We analysed all monthly death certificate data from Northern Ireland, for death caused by MI from 1979 through 1998 (n=68 683). Mortality data were standardized to a single reference group for the whole period. Seasonal variation in mortality and in environmental variables was described using the cosinor model. RESULTS: A total of 29 875 women and 38 808 men died from MI during the 20-year period. A significant decrease in mortality from MI was observed in both sexes, accompanied by a non-significant decline in the amplitude of the seasonal rhythm over the study period. Low temperature was associated with higher mortality rates from MI. DISCUSSION: We have documented an overall decline in cardiovascular mortality from 1979 to 1998, together with a small but non-significant decrease in seasonal variation. While improvements in medical care, lifestyle, housing and diet may have contributed to the observed decline in mortality rate, seasonal fluctuations remain a significant problem.

Female↗
PubMed2000

Synthesis and antimicrobial activity of copper(II) and manganese(II) alpha,omega-dicarboxylate complexes.

Copper(II) alpha,omega-dicarboxylate complexes of general formulae, [Cu(O2C(CH2)nCO2)].xH2O, [Cu(O2C(CH2)nCO2) (phen)2].xH2O and [Cu(O2C(CH2),CO2)(bipy)y].xH2O (n = 1-8; y = 1, 2; phen = 1,10-phenanthroline; bipy = 2,2'-bipyridine) were synthesised. These copper complexes, some related manganese(II) complexes and the metal-free ligands were screened in vitro for their ability to inhibit the growth of Candida albicans. Metal-free 1,10-phenanthroline and all of the copper(II) and manganese(II) phenanthroline complexes were potent growth inhibitors, with only one bipyridine complex, [Cu(O2C(CH2)CO2)(bipy)2].2H2O, having moderate activity. The remaining substances were effectively inactive. Complexes which were active against C. albicans also proved effective against C. glabratta, C. tropicalis and C. kreusi with the manganese complexes retaining superior activity. For the phenanthroline complexes the active drug species is thought to be the dication [M(phen)2(H2O)n]2+ (M = Cu, Mn). Escherichia coli and Staphylococcus aureus were resistant to all of the metal complexes and also to metal-free 1,10-phenanthroline. Only the copper phenanthroline complexes showed intermediate activity against Pseudomonas aeruginosa.

Anti-Bacterial Agents↗
PubMed2000

PROCUSTE1 encodes a cellulose synthase required for normal cell elongation specifically in roots and dark-grown hypocotyls of Arabidopsis.

Mutants at the PROCUSTE1 (PRC1) locus show decreased cell elongation, specifically in roots and dark-grown hypocotyls. Cell elongation defects are correlated with a cellulose deficiency and the presence of gapped walls. Map-based cloning of PRC1 reveals that it encodes a member (CesA6) of the cellulose synthase catalytic subunit family, of which at least nine other members exist in Arabidopsis. Mutations in another family member, RSW1 (CesA1), cause similar cell wall defects in all cell types, including those in hypocotyls and roots, suggesting that cellulose synthesis in these organs requires the coordinated expression of at least two distinct cellulose synthase isoforms.

Alleles↗
PubMed1996

Hazards in cottage industries in developing countries.

Occupational health and safety research and prevention programs in developing countries have focused almost exclusively on large-scale industries. The informal sector--especially home-based arts and crafts industries such as pottery, jewelry, weaving, and woodworking, as well as other cottage industries--are a major and neglected part of the economies of developing countries. These industries have many hazards, including lead, silica, toxic woods, cadmium, dyes, and ergonomic problems. Since the work is often done in the home and can involve whole families, the entire family, including children, can be at risk. Prevention programs involving training and education about the hazards, suitable precautions, and development of safer substitutes are needed. This will also require training of local health care providers in the diagnosis and treatment of occupational diseases related to hazards in these cottage industries.

Art↗
PubMed1993

Cotinine concentrations in semen, urine, and blood of smokers and nonsmokers.

Cotinine levels in the semen, urine, and blood of 88 male smokers and nonsmokers, aged 18 to 35, were analyzed via radioimmunoassay. Detectable cotinine levels were found in all three body fluids, and cotinine levels in all three fluids were highly correlated. Cotinine levels in semen and blood were of similar magnitude; cotinine levels in urine were an order of magnitude or more higher. In all three fluids, cotinine levels increased with an increase in cigarette smoke exposure.

Adolescent↗
PubMed1992

Controlled trial of a Y-set dialysis delivery system to prevent peritonitis in patients receiving continuous ambulatory peritoneal dialysis.

Peritonitis rates were compared in patients receiving continuous ambulatory peritoneal dialysis (CAPD) via either a Y-set dialysate delivery system or a standard system. Forty patients in each arm of the trial were matched for age (range 20-67 years, mean 49 years), and remained in the study for similar periods (range 3-36 months, mean 14.1 months). The observation time was 564 patient-months for each arm of the trial. There were 22 episodes of peritonitis in nine out of 40 patients using the Y-set and 57 episodes in 21 out of 40 patients using the standard system (P = 0.005 Wilcoxon signed rank test for episodes, P = 0.02 McNemar's chi 2 test for patients). Peritonitis rates were one episode per 25 patient-months in the Y-set group, and one episode per 9.7 patient-months in the standard group. In the Y-set group there were significantly fewer episodes caused by coagulase-negative staphylococci and Acinetobacter spp. There was no difference in the rate of episodes caused by Staphylococcus aureus, streptococci, enterococci, corynebacteria, enterobacteria or pseudomonads. There was no difference in the incidence of catheter exit wound infections. The Y-set dialysis delivery system is effective in reducing peritonitis rates in CAPD patients caused by organisms derived from the commensal skin flora, principally coagulase-negative staphylococci, but does not reduce peritonitis caused by other organisms.

Acinetobacter↗
PubMed1992

Day care center attendance and diarrheal morbidity in Colombia.

This study was designed to determine whether day care center attendance was associated with increased risk of diarrheal disease among poor children in an urban, developing country setting. From July 17 to December 18, 1988, mothers of 493 Colombian children less than 5 years old (241 attendees and 252 nonattendees) were interviewed weekly about diarrheal events during the previous week. The incidence of diarrhea was greater for day care center attendees than for nonattendees (3.2 vs 2.0 episodes per child-year, P < .0005). For children less than 2 years of age, attendees experienced 7.2 episodes/child-year vs 3.5 episodes per child-year for nonattendees (P < .0005). Analyses controlling for water source and availability, excreta disposal, socioeconomic status, and duration of follow-up showed that the increased diarrheal risk was limited to children younger than 3 years of age spending more than 30 hours per week in the centers. In addition, although the risk among attendees of suffering diarrheal episodes of longer duration was fairly constant across levels of socioeconomic status, this risk was inversely proportional to socioeconomic status for nonattendees. In summary, the increase in risk of diarrhea among young, full-time day care attendees was modest, yet important, because diarrhea continues to be a major cause of morbidity and mortality in Colombian children.

Child Day Care Centers↗
PubMed1992

The epidemiology of ciprofloxacin resistance in coagulase-negative staphylococci in CAPD patients.

Ciprofloxacin was used as empirical therapy for peritonitis in patients receiving continuous ambulatory peritoneal dialysis (CAPD) for 26 months, providing an opportunity to study the epidemiology of ciprofloxacin resistance amongst coagulase-negative staphylococci (CNS). Swabs were collected from the CAPD patients, staff, and clinic environment before, during and after the time this antibiotic was prescribed. Clinical isolates were also studied, and records kept of patient hospital attendance. Ciprofloxacin-resistant staphylococci were typed by antibiogram, biotype, plasmid profile, SDS-PAGE, and immunoblotting. No resistant strains were detected before the use of ciprofloxacin. During its use 30% of patients became skin carriers, and resistant strains caused 8% of peritonitis episodes in 7% of patients (38% of carriers). Resistant strains were isolated from the environment, but never from attending members of staff. A total of 208 resistant isolates with MIC's between 8 and 128 mg/l was collected and identified as Staphylococcus epidermidis or S. haemolyticus. Sixteen strain types were distinguished. There was epidemiological evidence for selection of resistant strains derived from the host commensal flora and also for cross-colonization, and cross-infection. Carriage of resistant strains fell to 15% of patients, 6 months after the use of ciprofloxacin had ceased.

Air Microbiology↗
PubMed1991

A phase I study of recombinant human interferon-alpha 2a or human lymphoblastoid interferon-alpha n1 and concomitant zidovudine in patients with AIDS-related Kaposi's sarcoma.

To determine the safety, maximum tolerated dose, and preliminary efficacy of concomitant interferon-alpha and zidovudine therapy in AIDS-related Kaposi's sarcoma (KS), 56 patients with biopsy-proven KS and documented human immunodeficiency virus type 1 (HIV) infection were enrolled into a phase I study. Interferon-alpha was given intramuscularly at a dose of 9, 18, or 27 mu once a day and zidovudine was administered as 100 or 200 mg every 4 h for 8 weeks followed by a 48-week maintenance period. The major toxicities were anemia, neutropenia, and hepatotoxicity. Neutropenia was dose limiting with 1,200 mg of zidovudine/day and the lowest dose of interferon-alpha (9 mu/day). Hepatotoxicity was dose limiting with 27 mu of interferon and 600 mg of zidovudine/day. Cumulative dose-related anemia or neutropenia was not seen during long-term follow-up. The maximum tolerated doses for the combination were defined as 18 mu daily for interferon-alpha and 600 mg daily for zidovudine. Variable changes in CD4 lymphocytes occurred during the first 8 weeks of therapy. At higher doses of the combination, sustained increases in median CD4 lymphocyte numbers were noted (p less than 0.001). In HIV antigenemic patients, progressive antigen suppression was seen with increasing doses of the combination (p less than 0.005). The overall antitumor response rate was 47%. Tumor regression was associated with better survival benefits (p less than 0.001) and a pretreatment CD4 cell count greater than or equal to 200 cells/mm3 (p = 0.01). In conclusion, intermediate doses of interferon-alpha and lower doses of zidovudine appear to be relatively well tolerated and associated with disease improvement, including survival benefits.

Acquired Immunodeficiency Syndrome↗