Serovar-specific prevalence and risk factors for leptospirosis among dogs: 90 cases (1997-2002)

摘要

Following the introduction of a bivalent vaccine against Leptospim interrogans serovars canicola and ictero-haemorrhagiae in the early 1970s, leptospirosis in dogs in the United States decreased. An increasing prevalence of leptospirosis in dogs during the 1980s and 1990s has been identified. Although this increasing prevalence has been documented in specific regions; for example, the midwest region of the United States during the 1990s; there have also been numerous reports of cases throughout North America during this same period.