نتایج جستجو برای: ecologic factors
تعداد نتایج: 1079102 فیلتر نتایج به سال:
OBJECTIVE On August 31, 1998, the rhesus-human reassortant rotavirus vaccine (RRV-TV) was licensed for use in the U.S. During the next nine months, 15 cases of intussusception were reported among infants who received the vaccine. Case-control and cohort studies showed a significantly increased risk of developing intussusception within one week of receiving the vaccine; subsequent ecologic studi...
The bank vole (Myodes glareolus) is the natural host of Puumala virus (PUUV) in vast areas of Europe. PUUV is one of the hantaviruses which are transmitted to humans by infected rodents. PUUV causes a general mild form of hemorrhagic fever with renal syndrome (HFRS) called nephropathia epidemica (NE). Vector-borne and zoonotic diseases generally display clear spatial patterns due to different s...
BACKGROUND Ecologic studies are commonly used to report associations between short-term air pollution and mortality. In such studies, the unit of observation is the day rather than the individual. Moreover, individual data on the subjects are rarely available, which limits the assessment of individual risk factors. These associations can also be investigated using case-crossover studies. Howeve...
OBJECTIVE From 1986 to 1999, the suicide rate in the Edmonton Regional Health Authority (RHA) was greater than that in the Calgary RHA (mean rate ratio 1.4). We conducted a study to determine whether a similar relation holds for parasuicide, and if so, whether the pattern can be explained at the ecologic level by sociodemographic factors. METHODS The Edmonton and Calgary RHAs provided data on...
“I’m a pop artist using natural history as my iconography,” Alexis Rockman has said of himself (1). Pop art, a movement that coincided with the youth and music phenomena of the 1950s and 1960s, draws its subject matter from the modern urban consumer experience, adopting popular culture icons and introducing them to the art world, much as American artist Andy Warhol incorporated and immortalized...
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