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PubMed1993

The Plunket National Child Health Study: birth defects and sociodemographic factors.

AIMS: The Plunket National Child Health Study was set up to examine the health experience of a representative sample of New Zealand children. This paper examines the association of birth defects with the sociodemographic variables of maternal age and education, parity, socioeconomic group, region of domicile and marital status; infant's ethnic group and sex. The effect of maternal smoking on the prevalence of birth defects was also examined. The paper compares the prevalence of birth defects in infants alive at 6 weeks with the reported prevalence at birth as described in various other publications. METHODS: A cohort of 4286 children born in New Zealand during 1990-1 were enrolled in the study. The presence of birth defects in the study population was determined by clinical examination and review of hospital or midwife referrals. All described defects were reviewed and coded according to the ICD-9. RESULTS: The overall prevalence of birth defects in the study was 4.3%. There was a significant association between socioeconomic status and the incidence of birth defect but no other significant sociodemographic variations. Cigarette smoking had no statistically significant effect on the rate of birth defects. There was a marked difference between the rates for certain defects in the Plunket study when compared to Health Department notifications. CONCLUSIONS: Because of the differences between the current study and official Health Department notifications we suggest that criteria for congenital anomaly notification are clarified, and that a second notification takes place at six weeks of age.

Adult↗
PubMed1995

Is New Zealand's recent increase in campylobacteriosis due to changes in laboratory procedures? A survey of 69 medical laboratories.

AIMS: To evaluate the contribution of changing procedures in microbiology laboratories over the previous 5 years to the increase in campylobacteriosis notifications. To assess whether regional differences in notification rates are due to variations in laboratory procedures. METHODS: A questionnaire was sent to 69 New Zealand medical laboratories, requesting data on their identification procedures for enteric pathogens, including campylobacter. RESULTS: Changes over the last 5 years in laboratory techniques were insufficient to account for a marked increase in campylobacter isolations. On the basis of data provided by 12 laboratories, the number of specimens that grew campylobacter increased by 49% between 1992 and 1993. Differences in laboratory methods do not explain regional differences in campylobacter notification rates. CONCLUSION: Changes in laboratory methodologies over the last 5 years do not appear to account for the recent national increase in campylobacteriosis notifications.

Campylobacter↗
PubMed1997

Laboratory practices for reporting bacterial susceptibility tests that affect antibiotic therapy.

OBJECTIVE: To evaluate a laboratory-based process for integrating antimicrobial susceptibility, pharmacy, and clinical data with rapid physician notification to improve the care and outcome of patients with bacterial infections. DESIGN: Randomized case control study comparing standard microbiology reporting method with a targeted notification procedure. RESULTS: Of 254 cases studied, a discordance between antimicrobial susceptibility test results and antibiotic therapy was detected in 140 (55%) patients and confirmed after clinical review in 49 (19%). Appropriate changes in antibiotic therapy were made significantly sooner and in a significantly higher proportion of cases with targeted notification than with standard reporting procedures. CONCLUSIONS: Utilization of antimicrobial susceptibility results is improved by integrating clinical and therapeutic information to identify cases that require physician notification, as measured by the timeliness and appropriateness of antibiotic treatment.

Anti-Bacterial Agents↗
PubMed2005

Epidemiology of tuberculosis in the Southeastern Iran.

In order to study the epidemiology of tuberculosis (TB) in Zabol, situated in the Southeast of Iran, this study was performed. Two thousand seven hundred and twenty-nine cases of tuberculosis disease were identified during 1998-2002. The notification rate was 135/100,000 population in 2002, which was higher than this rate in previous years. The notification rate of TB in Afghan population was significantly higher than Iranian population (202 cases/100,000 in Afghan and 122 cases/100,000 in Iranian population. The case notifications in 1998-2001 were 134, 131, 130, and 130 in 100,000 populations, respectively. The prevalence of smear-positive cases was 76/100,000 population in 2002 and the ratio of smear-positive cases to smear-negative and extrapulmonary cases was 1.46. This region remains high TB rates. It is necessary to pay attention to the detection of TB, by making their register in order to enhance the effectiveness and to reduce the cost of existing methods.

Adolescent↗
PubMed1995

Death in notified cases of tuberculosis in Edinburgh: 1983-1992.

Between 1983-1992, 730 cases of tuberculosis were notified in the Edinburgh area (population 6 x 10(5)). A review of available records identified 79 deaths (10.9% of all notifications). Thirty-seven patients (5.1%) died in the year following notification, 14 of these (five females, nine males; median age 71 years) due to tuberculosis. Five of these 14 deaths occurred within 7 days of starting chemotherapy and three deaths were due to miliary disease. Of 41 deaths (58%) before notification, 29 (19 females, 10 males; median age 77 years) were due to tuberculosis (autopsy rate 27/29) and 13 of these 29 deaths, all autopsied, were due to cryptic miliary disease. These findings reinforce continuing concerns about failure to diagnose tuberculosis, particularly cryptic miliary disease, in life.

Adult↗
PubMed2006

Low prevalence of TB on long-haul aircraft.

BACKGROUND: Proximity to an infectious TB case is a potential risk in any close contact setting. However, the rapid growth in airline transportation is in stark contrast to the lack of evidence about the prevalence of TB among airline passengers and crew. The rate of ventilation in the aircraft cabin is far superior to other forms of transportation and reduces the risk of airborne transmission. METHODS: This study calculated TB disease rates among passengers and cabin crew during the 5-year study period. The principal study outcome was the number of notifications of confirmed TB disease cases and potential under-reporting was estimated. The airline rates were compared with the WHO definition of low incidence--"a TB notification rate below 10 per 100,000 population and declining". FINDINGS: The TB case notification rate was 0.05 per 100,000 long-haul passengers. The risk increased seven-fold on flights from TB-endemic areas in Africa or India. The aircraft cabin remains classified as a low TB incidence environment on all routes within a wide margin of error. Low occupational prevalence was observed in the cabin crew workforce. INTERPRETATION: Airline passengers are considered to be a select group with low TB rates. This study provides important evidence that confirms the aircraft as a low-risk setting for transmission of TB and emphasizes the presence of environmental-control measures that reduce the risk as far as possible.

Aircraft↗
PubMed2003

Repeat capture-recapture studies as part of the evaluation of the surveillance of Legionnaires' disease in France.

We evaluated improvements made to the mandatory notification surveillance system for Legionnaires' disease in France by estimating its sensitivity in 1995 and 1998 using a repeat capture-recapture method. A case of Legionnaires' disease was defined as a person treated for pneumonia in whom legionella had been detected. Patient details were collected from (1) mandatory notifications; (2) the National Reference Centre for Legionella; (3) a postal survey of all hospital laboratories. The three sources were cross-matched and 715 individual cases were identified. A log-linear model, which included an interaction term between mandatory notifications and both the National Reference Centre and Laboratory sources, provided an estimated total of 1124 cases (95% CI 973-1275) in 1998, a twofold increase compared with 1995. The sensitivity of the surveillance system improved from 10% in 1995 to 33% (95% CI 29-38%) in 1998. Capture-recapture methods are important tools in the evaluation of surveillance systems.

Data Collection↗
PubMed1999

Bordetella pertussis surveillance in England and Wales: 1995-7.

Available data sources on disease due to Bordetella pertussis, including notifications, hospital admissions, deaths, and an enhanced laboratory-based surveillance system commenced in January 1994, were reviewed for the period 1995-7. Pertussis notifications continued their approximately 3-year cycle although at historically reduced levels. A slight seasonal increase in late summer/early autumn existed over and above a relatively constant background rate. Over time, the proportion of pertussis cases in younger, unvaccinated children, and to a lesser extent, adolescents and young adults, is increasing. There is a continuing significant and underreported mortality associated with pertussis in the very young age group. Disease due to serotype 1,2 is on the increase despite persistent high vaccination levels and this serotype causes more severe disease. The provision of preventative antibiotics prior to disease onset reduced the severity of the disease but its use remains uncommon in England and Wales. While overall levels of pertussis notifications have declined in recent times, vaccination efficacy wanes with increasing age, and pertussis remains a significant cause of mortality and severe morbidity in the very young. This could be reduced by timely booster vaccination and increased recognition of mild disease in older cases followed by early antibiotic therapy for the very young household contacts.

Adolescent↗
PubMedDate not supplied

Cocaine use and syphilis trends: findings from the arrestee drug abuse monitoring (ADAM) program and syphilis epidemiology in Houston.

There has been speculation that trends in syphilis have been fueled by crack cocaine use. This study examined the data on syphilis notifications and arrestee drug abuse monitoring (ADAM) to ascertain the relationships between syphilis and cocaine use trends in three racial/ethnic groups. Syphilis notifications and data from the ADAM project were compared in Houston/Harris County, Texas, from 1991-1998 using a linear regression equation. Data indicated significant relationships between the data for cocaine use and syphilis in African Americans but not Hispanics or non-Hispanic whites. For African Americans, 58% of the variance between cocaine use and syphilis was explained. When data limited to jail syphilis notifications and ADAM cocaine in African Americans were examined, the association was stronger for males than for females. For African Americans, cocaine (probably crack cocaine) use trends were significantly associated with syphilis trends in this population. These data suggest that control of crack cocaine may have an impact on syphilis rates and that there may be close relationships between some STDs and drug abuse.

Adult↗
PubMed1997

The epidemiology of tuberculosis by ethnic group in Birmingham and its implications for future trends in tuberculosis in the UK.

OBJECTIVES: To describe the epidemiology of tuberculosis (TB) in Birmingham, UK, by ethnic group and to assess the implications of the findings for future trends in TB in the UK. METHODS: Retrospective review of records of all patients notified with TB in Birmingham during 1989-1994. RESULTS: The decline in TB notifications in Birmingham halted and then reversed in 1987-1992. Trends in overall notifications were mainly influenced by trends in cases of Asian origin. Crude notification rates in 1989-1994 are 17 times higher in Asian than Caucasian residents (p < 0.01). Rates in African Caribbean residents are also statistically significantly higher than in Caucasians (p < 0.01) but significantly lower than in Asians. Crude rates for Asian people born abroad are 4.1 times higher than for Asians born in the UK (p < 0.01) but only 3.8% of Asian patients had been resident in the UK for less than 1 year. The group accounting for the highest number of cases were female Asians aged 20-29, followed by male Asians of the same age. Age-specific rates show that incidence increases with age in both Asian and white groups, with a small peak in 20-29-year-old Asians. TB is uncommon in all Caucasian age-groups under 50 years of age (less than 1 per 10,000) but is relatively common in all Asian age-groups over 15 years of age (over 10 per 10,000). CONCLUSIONS: The different epidemiology of TB in the Caucasian and Asian populations in the UK suggests that from about the second decade of the next century, TB in the UK will almost be entirely a problem of ethnic minorities and that even if new infection was eliminated now in Asian people, cases due to reactivation would continue to occur until the third quarter of the next century.

Adolescent↗
PubMed2005

Analysis of Barmah Forest virus disease activity in Queensland, Australia, 1993-2003: identification of a large, isolated outbreak of disease.

Barmah Forest virus (BFV) disease is the second most common mosquito-borne disease in Australia. Although the majority of notifications are received from Queensland, little is known about the distribution of the disease within the state, or the important mosquito vectors and nonhuman vertebrate hosts. We conducted a retrospective statistical analysis of the notifications received from Queensland residents from 1993 to 2003 to establish long-term local incidence rates and to identify disease outbreaks. In total, 4,544 notifications were received over the 10-yr period. Disease reporting peaked in autumn, although the peak transmission season encompassed both summer and autumn. Long-term standardized incidence rates for summer/autumn and winter/spring varied across the state, showing positive spatial autocorrelation in both 6-mo periods. Although 15 instances of increased disease activity were identified, only one major disease outbreak affecting eight contiguous local government areas was detected in summer/autumn 2002/2003. This outbreak contained 297 cases, 115 more than would be expected over this period. The factors important to this outbreak are unknown and require further investigation. Although the incidence rates for BFV disease are lower than Ross River virus disease, the most reported mosquito-borne disease in Australia, several factors indicate that this virus should be considered an important public health risk in Queensland. These include consistent endemic transmission, apparent underreporting of the disease, and the potential for outbreaks in major population centers.

Alphavirus Infections↗
PubMed2004

Rising HIV infection in Victoria: an analysis of surveillance data.

OBJECTIVES: To describe the epidemiology of HIV in Victoria between 1997 and 2002 using HIV surveillance data. METHODS: All HIV diagnoses notified to the Victorian HIV Registry from 1997 to 2002 were described. RESULTS: The average annual number of HIV notifications rose from 160 during 1997-99 to 216 during 2000-02, with the number of infections from men who have sex with men (MSM) increasing by 41%. Notifications from MSM acquired from casual or anonymous partners increased from 65 in 1997-99 to 92 in 2000-02. Infections attributable to heterosexual contact increased from an average number of 30 during 1997-99 to 46 during 2000-02, a 53% increase. CONCLUSIONS: This rise in HIV notifications in Victoria threatens this State's progress in controlling the HIV epidemic. IMPLICATIONS: The surveillance data demonstrate a need to implement effective, innovative and evidence-based programs for HIV prevention.

Disease Notification↗
PubMed2006

Parents of elementary school students weigh in on height, weight, and body mass index screening at school.

School-based body mass index (BMI) screening and parent notification programs have been recommended as a childhood overweight prevention strategy. However, there are little empirical data available to guide decision making about the acceptability and safety of programs. A pilot study was conducted using a quasiexperimental research design. In fall 2004, children in 4 suburban elementary schools (kindergarten to sixth grade) in the St Paul/Minneapolis, MN, metropolitan area completed height/weight screening. The following spring, parents in 2 schools received letters containing height/weight and BMI results. A self-administered post-only survey examined parents' opinions and beliefs regarding school-based BMI screening and parent notification programs (response rate: 790/1133 = 70%). The chi2 test of significance was used to examine differences in program support by treatment condition, child's weight status, and sociodemographic characteristics. Among all parents, 78% believed it was important for schools to assess student's height/weight annually and wanted to receive height, weight, and BMI information yearly. Among parents receiving the letter, 95% read most/all of the letter. Most parents (80%) and children (83%) reported comfort with the information in the letter. Parents of overweight children were more likely to report parental discomfort as well as child discomfort with letter content. There was considerable parental support for school-based BMI screening and parent notification programs. Programs may be a useful overweight prevention tool for children. However, continued attention to how best to support parents and children affected by overweight is required.

Body Height↗
PubMed2000

Recent declines in reported syphilis rates in eastern Europe and central Asia: are the epidemics over?

BACKGROUND: Since the early 1990s, major syphilis epidemics have occurred in the Newly Independent States (NIS) of the former Soviet Union. The new and rapidly changing societal and economic conditions in these countries challenge their traditional approaches to the control of sexually transmitted infections (STI). Nevertheless, following a steady increase until 1997, reported syphilis incidence has declined during the past 3 years in most parts of the region. We examine these trends against a background of ongoing changes in service delivery, care seeking behaviour, and case finding practices. METHODS: National syphilis surveillance data reported to the WHO Regional Office for Europe were compiled and analysed, and supplemented with information presented at recent expert meetings and with results from ongoing research. RESULTS: Since 1997, reported syphilis incidence either stabilised or declined in many locations in the NIS, but further increased in others, especially in rural areas. Congenital syphilis continued to increase in all countries, except Latvia. The proportion of self presenting cases versus cases detected through screening declined, and so did notifications of early compared with late forms of syphilis. Patients increasingly seek care in the private formal and informal healthcare sectors which hardly participate in case reporting. CONCLUSIONS: Recent declines in syphilis notifications in the NIS are at least partially a reflection of a reduced intensity of active case finding and of changes in reporting completeness because of a shift in service utilisation from the public to the private/informal sectors. Syphilis rates are still high, indicating that both public and private sectors have to respond more efficiently to the needs of many people at risk of STI. The collection of serial STI prevalence data is recommended to be able to validate trends in notifications.

Adolescent↗
PubMed2002

The evolution of sexually transmitted infections in the Ukraine.

OBJECTIVES: To evaluate trends in the national and regional reporting of syphilis, gonorrhoea, chlamydia, genital herpes, trichomoniasis, and HIV in Ukraine. METHODS: Annual notification rates of infection per 10(5) population in three regions of Ukraine--Donetsk, Mikolaiv, Chernivtsi--and also among children, adolescents, and pregnant women were used as indicators for the spread of sexually transmitted infections (STIs) in the Ukraine from 1994 to 2000. The estimates were based on a review of medical literature, reported data from STD clinics, and local epidemiological surveys. An analysis of the trends was made. RESULTS: The notification rate of trichomoniasis rose from 284.3 in 1997 to 330.8 in 2000. The same for syphilis was 68.7 per 100,000 population in 1994 peaked in 1996 with 150.9 falling to 91.5 in 2000. The reported incidence of gonorrhoea has been falling recently to 52.7/10(5) in 2000 (a 104.6% decrease since 1994). Chlamydia notification rates, however, rose 2.4-fold between 1995 and 2000 (16.1/10(5) to 54.2/10(5)). In the same period there was a 218% increase the reported incidence of genital herpes. STIs are more common in the eastern industrial regions. In the period 1994-7 there was a dramatic 179-fold increase in the prevalence of HIV/AIDS which has plateaued in subsequent years. By January 2001 a total of 36,600 cases of HIV infection (including 2040 people with AIDS) have been reported. The proportion of HIV acquired through injecting drug use is falling (72.7% in 1997 to 54.2% in 2000) in relation to that acquired through sexual contact. CONCLUSIONS: STIs and HIV are a common cause of morbidity in Ukraine.

Adolescent↗
PubMed2004

Implementing a public web based GIS service for feedback of surveillance data on communicable diseases in Sweden.

BACKGROUND: Surveillance data allow for analysis, providing public health officials and policy-makers with a basis for long-term priorities and timely information on possible outbreaks for rapid response (data for action). In this article we describe the considerations and technology behind a newly introduced public web tool in Sweden for easy retrieval of county and national surveillance data on communicable diseases. METHODS: The web service was designed to automatically present updated surveillance statistics of some 50 statutory notifiable diseases notified to the Swedish Institute for Infectious Disease Control (SMI). The surveillance data is based on clinical notifications from the physician having treated the patient and laboratory notifications, merged into cases using a unique personal identification number issued to all Swedish residents. The web service use notification data from 1997 onwards, stored in a relational database at the SMI. RESULTS: The web service presents surveillance data to the user in various ways; tabulated data containing yearly and monthly disease data per county, age and sex distribution, interactive maps illustrating the total number of cases and the incidence per county and time period, graphs showing the total number of cases per week and graphs illustrating trends in the disease data. The system design encompasses the database (storing the data), the web server (holding the web service) and an in-the-middle computer (to ensure good security standards). CONCLUSIONS: The web service has provided the health community, the media, and the public with easy access to both timely and detailed surveillance data presented in various forms. Since it was introduced in May 2003, the system has been accessed more than 1,000,000 times, by more than 10,000 different viewers (over 12.600 unique IP-numbers).

Age Distribution↗
PubMed2006

Cost-effectiveness of tuberculosis evaluation and treatment of newly-arrived immigrants.

BACKGROUND: Immigrants to the U.S. are required to undergo overseas screening for tuberculosis (TB), but the value of evaluation and treatment following entry to the U.S. is not well understood. We determined the cost-effectiveness of domestic follow-up of immigrants identified as tuberculosis suspects through overseas screening. METHODS: Using a stochastic simulation for tuberculosis reactivation, transmission, and follow-up for a hypothetical cohort of 1000 individuals, we calculated the incremental cost-effectiveness of follow-up and evaluation interventions. We utilized published literature, California Reports of Verified Cases of Tuberculosis (RVCTs), demographic estimates from the California Department of Finance, Medicare reimbursement, and Medi-Cal reimbursement rates. Our target population was legal immigrants to the United States, our time horizon is twenty years, and our perspective was that of all domestic health-care payers. We examined the intervention to offer latent tuberculosis therapy to infected individuals, to increase the yield of domestic evaluation, and to increase the starting and completion rates of LTBI therapy with INH (isoniazid). Our outcome measures were the number of cases averted, the number of deaths averted, the incremental dollar cost (year 2004), and the number of quality-adjusted life-years saved. RESULTS: Domestic follow-up of B-notification patients, including LTBI treatment for latently infected individuals, is highly cost-effective, and at times, cost-saving. B-notification follow-up in California would reduce the number of new tuberculosis cases by about 6-26 per year (out of a total of approximately 3000). Sensitivity analysis revealed that domestic follow-up remains cost-effective when the hepatitis rates due to INH therapy are over fifteen times our best estimates, when at least 0.4 percent of patients have active disease and when hospitalization of cases detected through domestic follow-up is no less likely than hospitalization of passively detected cases. CONCLUSION: While the current immigration screening program is unlikely to result in a large change in case rates, domestic follow-up of B-notification patients, including LTBI treatment, is highly cost-effective. If as many as three percent of screened individuals have active TB, and early detection reduces the rate of hospitalization, net savings may be expected.

Adult↗
PubMed2003

Invasive pneumococcal disease among children in Victoria.

This study analysed notification data from the first year of enhanced surveillance of invasive pneumococcal disease (IPD) in Victoria (1 July 2001 - 30 June 2002), with a focus on risk factors for infection and vaccination status among children under five years of age. Overall, there were 397 notifications (8.2 per 100,000 population), 131 (33%) were children under five years of age. The highest notification rates were among those aged less than two years (72.6 per 100,000 population). Among children aged less than five years: bacteraemia without a primary focus of infection was the most common clinical presentation (64%); 89 per cent were hospitalised with the median length of stay being three days; four children (3%) died. There were 107 cases of a known serotype, 92% (n = 98) were either in or closely related to those included in the 7-valent conjugate pneumococcal vaccine (7vPCV). Most cases (98%) were not eligible for free 7vPCV under the currently funded program in Victoria. Only one child had been vaccinated. The results from the first year of enhanced IPD surveillance in Victoria suggest consideration should be given to extending the publicly funded program to include all children under two years of age.

Age Distribution↗