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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 23 (1996), S. 0 
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The Cayapa Indians live in north-western Ecuador in close proximity to a Black population of African ancestry. C7 M/N allotyping has proved to be a good technique for plasma genetic analysis in several populations. Investigation of 124 Cayapa plasma samples revealed the highest allele frequency of C7*N observed in any population examined so far (0.36 versus 0.225 or lower). The marked difference in frequency compared with several Oriental populations, which are believed to have been derived from the same Asian population as native Amerindians, may reflect the effect of a small founder population followed by a high degree of genetic isolation. The allele frequency of 0.12 for C7*N determined for the neighbouring Black population supports the conclusion that there has been a lack of genetic admixture of Cayapas with other populations, confirming the results of ethnohistorical investigations and other protein polymorphism studies.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1439-0973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In mehreren europäischen Ländern wird eine sinkende Prävalenz von Antikörpern gegen das Hepatitis A Virus (anti-HAV) beobachtet. Diese Entwicklung ist bei den jüngsten Jahrgängen am stärksten ausgeprägt. 1979 waren noch 58% der Österreicher zwischen 20 und 30 anti-HAV positiv. In dieser Arbeit untersuchen wir die gegenwärtige epidemiologische Situation in Westösterreich. Nur mehr 7% der 18- bis 30jährigen haben anti-HAV. Dieser Prozentsatz steigt auf 20% (31 bis 40 Jahre) und 57% (41 bis 50 Jahre), und ist mit 87% am höchsten bei Personen über 50. Von 180 klinisch manifesten Hepatitis A-Fällen in den Jahren 1985 bis 1992 wurden 45% durch eine Reise in HAV-endemische Gebiete importiert. Bei Kindern traten 59 von 83 Fällen (71%) in Gastarbeiterfamilien auf, wobei das Virus meistens im Heimatland erworben wurde. Durch die neue Impfung wird eine Änderung der Präventionsstrategie nun möglich.
    Notes: Summary Several European countries report a decreasing prevalence of antibodies to hepatitis A virus (anti-HAV). This trend is most pronounced in the youngest age groups. In 1979, however, 58% of young Austrians aged 20 to 30 years were shown to possess anti-HAV. Here we describe the current epidemiological situation in western Austria. Prevalence of anti-HAV has decreased to 7% in those 18 to 30 years old. This percentage rises to 20% (31 to 40 years of age) and 57% (41 to 50 years of age) and is highest in those older than 50 years (87%). Of 180 cases of clinical hepatitis A occurring from 1985 to 1992 45% were imported by travel to HAV-endemic areas. Seventy-one percent of the cases in children (59/83) occurred in foreign workers' families and were also predominantly acquired abroad. A change in prevention policy should be considered in this respect, as vaccination is available now.
    Type of Medium: Electronic Resource
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