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Biomedical subjects

J Middaugh

Publications and source records attributed to J Middaugh.

13 recordsLinked to original sources

Measles outbreak in Juneau, Alaska, 1996: implications for future outbreak control strategies.

OBJECTIVE: To determine the most effective outbreak control strategy for school-based measles outbreaks as the proportion of children with two doses of measles-containing vaccine (MCV) increases. SETTING: A school-based measles outbreak during 1996 involving 63 cases in Juneau, Alaska (population 29 288), where systematic revaccination with MCV was not implemented. DESIGN: A retrospective evaluation using chain-of-transmission data of three possible outbreak control strategies: no school revaccination, targeted school revaccination (affected schools only), and community-wide school revaccination (all schools). Two-dose MCV coverage among students was estimated from school vaccination records and a survey issued to parents. PRIMARY OUTCOME MEASURES: Potentially preventable cases of measles and doses of MCV administered per case prevented. RESULTS: Two-dose MCV coverage among Juneau students was estimated to be 44% and 53% immediately before and after the outbreak, respectively. Of all the measles cases, an estimated 24 to 28 and 27 to 31 were potentially preventable by the targeted and community-wide school revaccination strategies, respectively. Either strategy might have optimally decreased the outbreak duration by 1 month, sparing one of seven affected schools and 10 of 12 unvaccinated children who had measles. Approximately 133 to 155 and 139 to 160 doses of MCV per case prevented would have been required for targeted and community-wide school revaccination, respectively. CONCLUSIONS: Either targeted or community-wide school revaccination would have been effective control strategies for this outbreak. Targeted school revaccination is probably the intervention of choice for school-based measles outbreaks in larger communities with higher two-dose MCV coverage. As two-dose MCV coverage continues to increase in the United States, public health control measures to respond to outbreaks need to be reevaluated.

Adolescent

Alcohol-related injury death and alcohol availability in remote Alaska.

CONTEXT: Injury is a major public health problem in Alaska, and alcohol consumption and injury death are associated. OBJECTIVE: To determine the association between injury death, particularly alcohol-related injury death, and alcohol availability in remote Alaska. DESIGN, SETTING, AND PARTICIPANTS: Survey using death certificate data and medical examiner records to compare mortality rates for total injury and alcohol-related injury during 1990 through 1993 among Alaskans aged 15 years and older who had resided in remote villages of fewer than 1000 persons. MAIN OUTCOME MEASURES: Rate ratios of injury death among residents of wet villages (ie, those without a restrictive alcohol law) as compared with injury death among residents of dry villages (ie, those with laws that prohibited the sale and importation of alcohol). RESULTS: Of 302 injury deaths, blood alcohol concentrations (BACs) were available for 200 deaths (66.2%). Of these, 130 (65.0%) had a BAC greater than or equal to 17 mmol/L (> or =80 mg/dL) and were, therefore, classified as alcohol related. The total injury mortality rate was greater among Alaska Natives from wet villages (rate ratio [RR],1.6; 95% confidence interval [CI], 1.3-2.1), whereas this difference was not present for nonnatives (RR, 1.1; 95% CI, 0.3-3.8). For Alaska Natives, the alcohol-related injury mortality rate was greater among residents of wet villages (RR, 2.7; 95% CI, 1.9-3.8) than among residents of dry villages. The strength of this association was greatest for deaths due to motor vehicle injury, homicide, and hypothermia. CONCLUSIONS: Although insufficient data existed to adjust for the effects of all potential confounders, residence in a wet village was associated with alcohol-related injury death among Alaska Native residents of remote Alaska villages. These findings indicate that measures limiting access to alcoholic beverages in this region may decrease alcohol-related injury deaths.

Accidents

Epidemiology of injuries in northern areas.

Traumatic injuries are among the leading causes of death in Alaska and the arctic. Intentional injuries (homicide and suicide) and unintentional injuries (motor vehicle crashes, drowning, aviation crashes, alcohol and other drugs) cause 29% of all deaths and 53% of all years of potential life lost (YPLL) in Alaskans. Mortality and morbidity rates due to injuries remain higher among Alaska Natives than other racial groups. The occupational fatality rate in Alaska (33 deaths per 100,000 workers) is the highest in the United States and is largely due to the large number of deaths among commercial fishermen, airplane pilots, sailors, truck drivers, and loggers. Effective injury control and prevention efforts are hampered by lack of adequate surveillance systems. Injury research and public health control measures are unfocused, lack continuity, and are undersupported.

Alaska

Diabetes prevalence in Alaska, 1984-1986.

The prevalence of diabetes in Alaska from 1984 to 1986 was determined through medical records review. Cases were identified from hospital and physician discharge forms and from financial abstracts. As of December 1986, 3,719 Alaskans met the criteria for physician diagnosis of diabetes. The overall age-adjusted prevalence of diagnosed diabetes mellitus, 1,357/100,000, was lower than the U.S. rate of 2,470/100,000. The overall age-adjusted prevalence rates of specific complications and pregnancy among Alaskans with diabetes were retinopathy--167.5/1,000; blindness--24.3/1,000; amputations--19.4/1,000; end stage renal disease--9.7/1,000; pregnancy--50.7/1,000. Limitations in available data sources such as death certificates, hospital records, and subspecialists' medical records provided serious problems in identifying persons with diabetes, especially those in the 30- to 69-year age group who have not yet developed complications requiring hospitalization or subspecialty care. This population perhaps is most in need of services to prevent future complications of diabetes.

Adolescent

A comprehensive rabies control program in Alaska.

In 1975 the State of Alaska initiated a comprehensive Rabies Control Program. Lay vaccinators trained and certified by the state provided animal vaccination in rural areas. From 1975 through 1980, 182 persons received post-exposure rabies prophylaxis with Human Rabies Immune Globulin (HRIG) plus Duck Embryo Vaccine (DEV), or Human Diploid Cell Vaccine (HDCV), while 2,569 persons initially thought to have been exposed were not treated after consultation, at a cost saving of approximately $3,220,241.

Alaska

Injuries associated with snowmobiles, Alaska, 1993-1994.

OBJECTIVE: To characterize the nature and burden of snowmobile injuries in Alaska by examining injury deaths and hospitalizations associated with snowmobiles and comparing these with injury deaths and hospitalizations associated with on-road motor vehicles. METHODS: The authors used vital statistics, medical examiner, Department of Public Safety, and Department of Transportation records to identify snowmobile injury deaths, and used vital statistics mortality files to identify on-road motor vehicle injury deaths. The Alaska Trauma Registry provided data on hospitalizations. The number of vehicles in use in 1993-1994 was estimated from snowmobile sales and on-road motor vehicle registrations. RESULTS: For 1993-1994, injury death and hospitalization rates were greater for snowmobiles than for on-road motor vehicles. In northern Alaska, snowmobile injuries outnumbered on-road motor vehicle injuries. A total of 26 snowmobile injury deaths were reported; 7 decedents drowned after breaking through ice and 8 were ejected from vehicles. More than half (58%) of the snowmobile injury deaths involved a natural object such as a boulder, ravine, or river. Of the 17 decedents for whom blood alcohol concentrations were available, 11 (65%) had blood alcohol concentrations > or = 100 mg/dL. CONCLUSIONS: Natural obstacles and alcohol intoxication contribute to the high risk of injury death associated with snowmobile use. Injury control strategies, including trail development and improvement, should be evaluated.

Accidents, Traffic

The contribution of reinfection to gonorrhea incidence in Alaska, 1983 to 1987.

Gonorrhea case reports to the Alaska Department of Health and Social Services were used to study the contribution of reinfection to rates of gonorrhea infection in Alaska. The case reports of 13,910 infections among 11,132 persons who had laboratory-proven gonorrhea between 1983 and 1987 were examined. Among 1,886 persons who had multiple infections, the average number of infections per person was 2.5 (range = 2-11). These persons accounted for 33.5% of all infections and 16.9% of all patients with gonorrhea from 1983 to 1987. Compared to persons with one infection, those having multiple infections were more likely to be Alaska Natives (relative risk = 1.8, 95% confidence interval = 1.6-1.9) and less than 21 years of age (relative risk = 1.3, 95% confidence interval = 1.2-1.4). There was no difference in risk between men and women. Two thirds of the reinfections occurred within 12 months of the initial infection. If gonorrhea incidence were calculated based on the number of people infected rather than as a "case rate," the mean annual rate (per 100,000) from 1983 to 1987 decreased from 1,644 to 1,228 (a 25.3% decrease) for Alaska Natives and from 316 to 267 (a 15.5% decrease) for non-Natives. Reporting gonorrhea incidence rates by number of persons infected rather than by total number of cases more accurately measures gonorrhea morbidity in a population and will allow prevention efforts to be directed to those persons who contribute the most to perpetuating the disease.

Adult

Epidemiologic surveillance of enteric diseases in Alaska--value of case investigation.

Patients infected by Salmonella, Shigella, Giardia, Campylobacter, Yersinia, and Hepatitis A virus were interviewed during a 15-month period to evaluate the benefit of intensive follow-up, to assess the proportion of cases who had contact with children less than four years of age, and to determine risk factors. Of 746 reported infections, we interviewed 345 patients (46%) and identified 199 other ill people. Follow-up of sporadic, passively reported cases required considerable resources, but no large outbreaks were uncovered. Investigation of patients [N = 103 (43%)] who had contact with children less than four years of age, or children who attended daycare centers often resulted in identification of additional illness, especially for cases of giardiasis. Primary health care providers can play a key role in reducing enteric disease by increasing efforts to identify illness among daycare and family contacts of their patients.

Adolescent