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Emerg Infect Dis. 2015 Jan;21(1):107-10. doi: 10.3201/eid2101.140009.
Antibodies against Borrelia burgdorferi sensu lato among Adults, Germany, 2008-2011.
Wilking H, Fingerle V, Klier C, Thamm M, Stark K.
Abstract
To assess Borrelia burgdorferi sensu lato (the cause of Lyme borreliosis) seropositivity in Germany, we tested serum samples from health survey (2008-2011) participants. Seroprevalence was 5.8% among women and 13.0% among men; infection risk was highest among persons >60 years of age. Public health interventions, including education about risk factors and preventive measures, are needed.
Ticks Tick Borne Dis. 2015 Apr;6(3):221-7. doi: 10.1016/j.ttbdis.2014.12.006. Epub 2015 Feb 7.
Human seroprevalence against Borrelia burgdorferi sensu lato in two comparable regions of the eastern Alps is not correlated to vector infection rates.
Sonnleitner ST1,
Margos G2,
Wex F3,
Simeoni J4,
Zelger R5,
Schmutzhard E6,
Lass-Flörl C3,
Walder G7.
Author information
Abstract
Seroprevalences were determined by testing sera of 1607 blood donors from North, East, and South Tyrol. In the Tyrols, the continental divide delimitates areas with high seroprevalences of IgG antibodies against Borrelia burgdorferi sensu lato in the North (7.2%) from areas with low seroprevalences in the South (1.5%). To determine Borrelia prevalences in unfed Ixodes ricinus ticks, 755 questing ticks were tested by PCR. Prevalences in nymphal and adult ticks were found to be 19.7% (n=132) and 21.5% (n=205) in North Tyrol and 23% (n=43) and 23.7% (n=376) in South Tyrol, respectively. Sequencing of 46 Borrelia-positive ticks yielded 74% Borrelia (B.) afzelii, 11% B. garinii, 7% B. lusitaniae, 7% B. burgdorferi sensu stricto, and 2% B. valaisiana infections. Distinct genetic clusters could not be delimitated on either side of the continental divide. This study describes occurrence and geographic dispersion of Borrelia spp. in the Tyrols, discusses possible reasons for significant differences in human seroprevalence, and indicates that prevalence of Borrelia in vector ticks is not a direct predictive factor for the local seroprevalence in humans.