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Biomedical subjects

D O'Flanagan

Publications and source records attributed to D O'Flanagan.

14 recordsLinked to original sources

Tuberculosis in the Republic of Ireland at the end of the 1990s.

There has been limited detailed epidemiological data available on tuberculosis in the Republic of Ireland. The 1998 and 1999 National TB Reports produced by the National Disease Surveillance Centre presented disaggregate national data describing in detail the epidemiology of TB in the Republic of Ireland. Individual case notifications were collated by health boards, forwarded to NDSC where they were entered onto a national TB database and then analysed using Epi-Info. There were 893 cases of TB notified in 1998-1999. It was more common in older age groups and men. 50% of cases occurred in those less than 45 years, an indication of considerable ongoing transmission of tuberculosis. Regional variation in the rate of TB exists and a relatively small proportion of cases occurred in foreign-born patients. TB in HIV positive patients was not common and MDR-TB has also been observed. TB has not disappeared from the Republic of Ireland. Treatment, contact tracing and surveillance need to be maintained and preferably enhanced.

Adolescent↗

Day-care and meningococcal disease in young children.

The Republic of Ireland has the highest incidence of meningococcal disease in Europe with 40% of all cases occurring in children under the age of 5 years. Attending day-care increases the risk of certain infections, including Haemophilus influenzae type b (Hib) meningitis. The risk of meningococcal disease associated with day-care is not known. We conducted a case-control study among pre-school children with 130 laboratory-confirmed cases and 390 controls, matched on age, gender and place of residence, to determine if day-care attendance was a risk factor for meningococcal disease. Multivariate analysis showed that day-care attenders had a lower risk of disease than non-attenders (OR 0.3, 95% CI 0.1-0.7) whereas the number of adults in a household, and household crowding were independent risk factors for disease. Asymptomatic carriers of Neisseria meningitidis are the main source of transmission and these carriers are usually adults. Regular day-care attendance may reduce this risk by removing children from close and prolonged contact with adults.

Adult↗

Surveillance of hospital-acquired infection in the Republic of Ireland: past, present and future.

There is increasing interest in the surveillance of hospital-acquired infection (HAI) in the Republic of Ireland due to a greater awareness of the consequences of antibiotic resistance, and consumer pressure in the form of public expectations of the quality of health care. To date there have been no nationwide prospective surveillance projects but surveillance has taken place in the form of participation in international and national studies, and the description of local outbreaks. Infection control teams and others have participated in projects such as a European study of HAI in intensive care units conducted in 1992, the second national prevalence study conducted in the UK in 1993 and two surveys of methicillin-resistant Staphylococcus aureus (MRSA) carried out in 1995 and 1999, the latter involving colleagues in Northern Ireland. There have been a number of local surveys of antibiotic-resistant bacteria including the molecular characterization of MRSA in Dublin hospitals, vancomycin-resistant enterococci, and Gram-negative bacteria such as Enterobacter spp. and Serratia spp. affecting compromised patients such as bone marrow transplant recipients. In the future, it is hoped to standardize case definitions, automate data entry, increase collaboration with surveillance initiatives in Northern Ireland and link in with European networks such as EARSS and HELICS. Apart from the need to improve the quality of health care in Irish hospitals, approximate costings suggest that there are potential savings of 7.5 pounds sterling -15 pounds sterling m to be made following a reduction of HAI rates of 15%.

Cross Infection↗

Oral fluid collection by post for viral antibody testing.

BACKGROUND: The objective of this study was to estimate the prevalence of hepatitis B virus exposure (HBV) in the population of the Republic of Ireland, by using oral fluid (saliva) collection by post for hepatitis B anti-core antibody (anti-HBc). This paper discusses the methodological approach used and the strategies that were adopted to improve response rates. METHODS: The sampling frame used was the Register of Electors for Irish parliamentary elections. A multistage stratified cluster sample was taken, and a total of 962 households were selected nationally. A four-letter approach was employed for sample collection. Households received an initial letter outlining the purpose of the study. This was followed by a letter containing six swabs for oral fluid collection, along with easy-to-follow instructions. Non-respondents received two reminder letters, and were also telephoned where possible. A telephone helpline was provided. All testing was anonymous and unlinked. RESULTS: The study achieved a good household response rate (60.4%), and more than 98% of the 1738 specimens received were suitable for testing. The prevalence of anti-HBc in the Irish population was estimated to be 0.51%. The observed design effect was 1.29. DISCUSSION: From a review of the literature, this is the first study where a representative sample of a national population was asked to self-collect oral fluid samples and return these by post for serological testing. The technique may have many future applications in epidemiological research.

Adult↗

Prevalence of hepatitis B anti-core antibody in the Republic of Ireland.

The aim of this study was to estimate the prevalence of hepatitis B exposure in the population of the Republic of Ireland, by measuring the prevalence of hepatitis B anti-core antibody in oral fluid collected by postal survey. A random multi-stage stratified sample of Irish households was obtained, using the Irish electoral register as the sampling frame. A total of 962 households were selected, and a household response rate of 60.4% was achieved. Oral fluid specimens totalling 1714 were tested for antibody to hepatitis B core antigen (anti-HBc), using an Immune Capture Enzyme Immuno-Assay. Five specimens (0.29%) were found to contain anti-HBc. Adjusting for study design, the estimated anti-HBc prevalence in the Republic of Ireland is 0.51%. This study demonstrates that self-collection of oral fluid samples is acceptable to the public, and based upon the data generated, that the Republic of Ireland has a low prevalence of hepatitis B infection.

Adolescent↗

Outcome of medical screening of Kosovan refugees in Ireland: 1999.

In March 1999 armed conflict broke out in Kosova and about 900,000 ethnic Albanians were displaced. We reviewed the health care offered to the 945 Kosovan refugees who arrived in Ireland in 1999, which included screening for tuberculosis (TB) and hepatitis B. On arrival in Ireland 540 refugees had already received oral polio vaccine (57%), 512 diphtheria, tetanus, and acellular pertussis or diphtheria and tetanus vaccine (54%), 310 BCG (33%), 207 measles, mumps, and rubella vaccine (22%) and 60 Haemophilus influenzae type b (6%). Twelve refugees were diagnosed with TB. Twenty-six refugees were HBsAg positive (3%) and 168 were anti-HBcAg positive (18%). Organised screening of Kosovan refugees on a voluntary basis (uptake > 95%) revealed low percentages who had been immunised and relatively high rates of TB and hepatitis B. The provision of optimum immunisation, screening, and treatment services to address these issues requires substantial staffing and financial resources.

Albania↗

Spring fever.

Explore the source record for details and available documents.

Humans↗

Leptospirosis in the Republic of Ireland: 1985 to 1996.

Official government statistics and serological laboratory data provide limited information about the incidence of leptospirosis in the Republic of Ireland. The mean annual notified incidence in the Republic of Ireland from 1985 to 1996 was 1.3/million. The incidence according to hospital discharge diagnosis was higher at 4.9/million. One hundred and seventy-five serologically confirmed cases of leptospirosis were reported from 1986 to 1996, giving a mean annual incidence of 4.5/million. The true incidence of leptospirosis in the Republic of Ireland is probably higher, as hospital discharge data are incomplete and full serological testing was not always performed. Our data indicate that leptospirosis is an underestimated public health problem with only 26% of cases being notified. A national communicable disease surveillance centre in the Republic of Ireland would facilitate better monitoring and understanding of this disease.

Adult↗

Risk factors for Neisseria meningitidis carriage in a school during a community outbreak of meningococcal infection.

As part of the management of an outbreak of meningococcal infection, 119 school contacts of an index case were swabbed for nasopharyngeal carriage. In a cohort study, risk factors for Neisseria meningitidis carriage were ascertained by means of a questionnaire, completed by 114 (96%) of those swabbed. Twenty five (21%) cultures were identified as "neisseria positive'; of which there were 18 (15%) Neisseria meningitidis isolates, 2 (2%) Neisseria lactamica isolates and 5 (4%) showed contaminants only. Two (2%) carriers were identified as harbouring the implicated outbreak strain. Single variable analysis identified six statistically significant risk factors for meningococcal carriage; increasing age, female sex, manual social class, personal smoking, regular attendance at a discotheque and rhinorrhoea. Multivariate analysis, using logistic regression modelling, found that of these six variables only age, sex and social class remained statistically significant when the other factors were controlled for. Nevertheless the role of smoking, social events and respiratory/viral infections in nasopharyngeal carriage, and other plausible mechanisms whereby age, sex and social class might exert their effect, could usefully be investigated further.

Adolescent↗

The risk of hepatitis A from sewage contamination of a water supply.

The drinking water supply of a town became contaminated with sewage. The town's population was surveyed to determine the baseline prevalence of hepatitis A antibodies and to establish whether an associated outbreak of hepatitis A had occurred. Samples of saliva were obtained from 540 people in 200 randomly selected households, and tested for IgG and IgM antibodies to hepatitis A. Fifty-six per cent (279/495) were susceptible to hepatitis A and 43% (213/495) immune as a result of previous infection. Immunity was directly related to age; those who were immune were significantly older than those who were susceptible (mean ages: 43.5 years and 19.0 years; p < 0.0001). Six people were found to have had a recent infection with hepatitis A, but exposure to hepatitis A during the water pollution incident was possible in only one case. The results offer no evidence that this incident caused an outbreak of hepatitis A, but the study has provided useful epidemiological data on hepatitis A.

Adolescent↗

Illness in a community associated with an episode of water contamination with sewage.

Following an episode of water contamination with sewage in a rural Irish town, a community-wide survey of gastrointestinal-associated illness and health service utilization was conducted. Random sampling of households yielded residents who were surveyed using a self-administered questionnaire. Of 560 respondents from 167 (84%) households, equal proportions lived in areas known to have been exposed and unexposed to the contaminated water, although 65% of subjects reported using contaminated water. Sixty-one percent of subjects met the case definition. The most common symptoms among cases were abdominal cramps (80%), diarrhoea (75%), appetite loss (69%), nausea (68%) and tiredness (66%). Mean duration of illness was 7.4 days. Only 22% of cases attended their general practitioner. Drinking unboiled water from the exposed area was strongly associated with being a case. A substantial degree of community illness associated with exposure to contaminated water was observed. The episode ranks as one of the largest reported water-borne outbreaks causing gastrointestinal illness in recent times.

Disease Outbreaks↗

An outbreak of multidrug-resistant Salmonella typhimurium food poisoning at a wedding reception.

An outbreak of gastrointestinal illness among 127 persons attending a wedding reception in Dublin was investigated. One hundred and fifteen wedding guests were interviewed and information obtained about demographic and clinical characteristics, and food consumed at the reception. Faecal samples from ill guests were submitted for microbiological examination and environmental investigations conducted at the catering facilities. Fifty-eight cases (diarrhoea within three days after having eaten at the reception) were identified. Forty-six cases submitted stool samples, of which 39 were culture positive for Salmonella typhimurium. Two isolates were phage-typed and found to be DT 104. Turkey was identified as a potential vehicle for this outbreak. A sample of litter from young birds at the poultry farm which had supplied the turkeys also tested positive for Salmonella Typhimurium DT104. In the Republic of Ireland S.typhimurium accounts for almost 50% of all human salmonella isolates. Epidemiological and microbiological studies which relate the human and animal spectrum of this disease need to be undertaken as a priority.

Adolescent↗

Legionnaires' disease in Ireland--a cause for concern?

Legionnaires' disease is a multi-system illness that can have widespread clinical symptoms, though the principle manifestation is pneumonia. A review of all legionnaires' disease case notifications in Ireland in the 4 year period 1998-2001 was undertaken to assess the degree of concern health authorities here should have in relation to this disease. There were 17 cases of legionnaires' disease (all were legionella pneumophila serogroup 1) notified to the National Disease Surveillance Centre in the period 1998-2001. Nine cases were travel-associated cases with the majority of cases occurring during the summer months. There were 2 deaths. It would appear that legionnaires' disease is rare in Ireland but when compared with other European countries Ireland is conspicuous by its low rate. This would suggest that a major degree of under diagnosis and under reporting of legionnaires' disease currently exists in Ireland.

Adult↗