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  • Title: New findings on anaplasmosis caused by infection with Anaplasma phagocytophilum.
    Author: Lillini E, Macrì G, Proietti G, Scarpulla M.
    Journal: Ann N Y Acad Sci; 2006 Oct; 1081():360-70. PubMed ID: 17135539.
    Abstract:
    Ixodes ricinus (I. ricinus) is one of the vectors of Anaplasma phagocytophilum (A. phagocytophilum) in Europe, in which rates of infection range from 1.9% to 34%. In 1998, human granulocytic ehrlichiosis-like (HGE-like) Ehrlichia DNA was detected in Italy, by PCR technique in one I. ricinus nymph out of 55 ticks that were examined. In 1996, 6.3% of 310 human sera in high-risk subjects from Italy were found positive for antibodies to Ehrlichia phagocytophila (E. phagocytophila). In the same year, the authors reported the first case of equine granulocytic ehrlichiosis. In 1997, only 2 out of 563 equine blood samples examined were found positive for antibodies to E. phagocytophila in the Latium region. In 1998, serological positivity was not observed in 14 symptomatic race horses. In 2002, a symptomatic horse living in Rome was found positive for Ehrlichia equi (E. equi) antibodies, as confirmed by PCR. E. equi was also demonstrated in horses by detection of specific antibodies from two asymptomatic ponies. We tested 128 sera from sheep in different flocks, and antibodies to E. phagocytophila were detected in 17 sera (13.3%) of these sheep. From 2000 to 2004, 147 dog sera were tested for antibodies against A. phagocytophilum, and 7 of these sera were positive (4.8%). These data confirm the presence of the infection in human, domestic animals, and pets in Italy. Studies are under way to correlate the distributions of the disease and tick vector, I. ricinus.
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