منابع مشابه
Discussion: Animal Studies
Cutaneous lesions that develop in the rabbit following inoculation of tick homogenates infected with Lyme disease spirochetes closely mimic erythema chronicum migrans (ECM) in humans. Dr. Kornblatt was able to induce ECM-like lesions in rabbits at the site of inoculation within a short period of time, but Dr. Burgdorfer observed the development of skin lesions in remote sites up to 12 weeks aft...
متن کاملDiscussion: Epidemiologic Studies
What is the distribution and population density of ticks transmitting the Lyme spirochete? Data on tick distribution are scarce. Ixodes dammini appears to be limited to sea-level ecosystems, whereas L pacificus populations are adequate up to 7,000 feet elevation. Three cases of Lyme disease had their exposure above 5,000 feet in the Sierras of northern California. The nymphal tick is very small...
متن کاملPreservation of thin tephra
The preservation of thin (<300 mm thick) tephra falls was investigated at four sites in Papua New Guinea (PNG), Alaska and Washington, USA. Measurements of the variations in the thickness of: (i) Tibito Tephra 150 km downwind from the source, Long Island (PNG) erupted mid-seventeenth century; (ii) St Helens W tephra (erupted 1479–80 A.D.) on the slopes of the adjacent Mt. Rainier in Washington ...
متن کاملReview, discussion, and summary of epidemiological studies.
This paper reviews and summarizes the epidemiological studies presented at the Symposium on the Health Effects of Acid Aerosols. Two studies of acute episodes examined different indicators of respiratory morbidity before, during, and after the January 1985 air pollution event in western Europe. In the U.K. no increase in respiratory morbidity, as reported by a group of general practitioners, wa...
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ژورنال
عنوان ژورنال: The Quaternary Research (Daiyonki-Kenkyu)
سال: 1991
ISSN: 1881-8129,0418-2642
DOI: 10.4116/jaqua.30.447