This finding was supported by the fact that the PFGE profile of 1 strain was modified after 9 subcultures while the profile from sequence-based typing remained identical (37), which showed that this method was unreliable in assessing epidemiologic
aspects of B.
studies have focused on the possible role of environmental risk factors present during adult life or aging.
Included are small group discussions of epidemiologic
case exercises based on field investigations.
studies of human consumption of the cyclamate/saccharin mixture concentrated on bladder cancer, the committee says, and did not show a "clear increase in risk in most categories of users.
The incidence and epidemiologic
features of the disease are poorly understood because of underrecognition, difficulty in isolating Blastomyces dermatitidis from natural sites, lack of an effective skin test, and because blastomycosis is not nationally reportable in either Canada or the United States (3).
This review provides an overview of the epidemiologic
evidence for environmental etiologies for neurodegenerative diseases such as Alzheimer disease, Parkinson disease, parkinsonian syndromes (multiple system atrophy and progressive supranuclear palsy), and amyotrophic lateral sclerosis.
WHO has a constitutional mandate to act as the directing and coordinating authority on international health work and also the substantial tasks--among many others--of establishing and maintaining epidemiologic
and statistical services and of proposing regulations dealing with international health matters.
Furthermore, a proper case definition is not only needed from an epidemiologic
classification standpoint but also has downstream implications related to identifying cases, controlling an outbreak, and saving lives.
Statistical Methods in Epidemiologic
Research (online access included)
Human health risk assessments have traditionally relied heavily on toxicologic and other experimental data, but there is an increased recognition of the value of using epidemiologic
data in risk assessment.
He covers disease causality, epidemiologic
measures, random and systematic error in studies of casual factors, the infectious disease process, outbreak investigation, screening for disease, and advanced biostatistical and epidemiologic
techniques, such as survival analysis, Mantel-Haenszel techniques, and tests for interaction.
Its content includes presentations and discussions of epidemiologic
principles, basic statistical analysis, public health surveillance, field investigations, surveys and sampling, and discussions of the epidemiologic
aspects of current major public health problems in global health.