期刊
VECTOR-BORNE AND ZOONOTIC DISEASES
卷 7, 期 4, 页码 507-517出版社
MARY ANN LIEBERT, INC
DOI: 10.1089/vbz.2006.0633
关键词
Lyme borreliosis incidence; Ixodes ricinus; ticks; density; B. burgdorferi sl-France
We conducted a prospective study to estimate the Lyme borreliosis incidence in two rural French departments, Meuse and Puy-de-Dome. Concurrently, we investigated the prevalence of ticks infected with Borrelia burgdorferi sensu lato (sl) and Anaplasma phagocytophilum. The incidence of Lyme borreliosis decreased from 156 to 109/100,000 inhabitants in Meuse and from 117 to 76/100,000 inhabitants in Puy-de-Dome in 2004 and 2005, respectively, corresponding to a decrease in the density of Ixodes ricinus nymphs infected with B. burgdorferi A. During the same period, the density of adult ticks increased. Interestingly, B. valaisiana, a nonpathogenic species, infected adult ticks more often than nymphs. These results confirmed the correlation between the Lyme borreliosis incidence and the density of infected nymphs, a stage preferentially infected with B. afzelii. In contrast, we found a low rate of infection by A. phagocytophilum, ranging from 0% to 0.4% in Puy-de-Dome and from 0.8% to 1.4% in Meuse, suggesting a low risk for humans.
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