Ma. Guerra et al., Canine surveillance system for Lyme borreliosis in Wisconsin and northern Illinois: Geographic distribution and risk factor analysis, AM J TROP M, 65(5), 2001, pp. 546-552
Citations number
41
Categorie Soggetti
Envirnomentale Medicine & Public Health","Medical Research General Topics
A seroprevalence survey for Borrelia burgdorferi was conducted among the he
althy canine pet population in selected counties of Wisconsin and northern
Illinois to determine the distribution of Lyme disease and associated risk
factors. Information obtained for each dog included place of residence, Lym
e disease vaccination status, history of travel and tick exposure, signalme
nt, and medical history. Serum samples were screened by enzyme-linked immun
osorbent assay and confirmed by an immunoblot procedure. Seroprevalence by
county ranged 0-40%, With the highest estimates from west-central Wisconsin
. The spatial pattern was significantly correlated with human incidence of
Lyme disease and with abundance of the tick vector, Ixodes scapularis. A ge
ographic information system (GIS) was used to integrate environmental data
with the location of the residences of the dogs to determine environmental
risk factors. Seropositivity among dogs was positively associated with incr
eased tick exposure and time spent outdoors and negatively associated with
vaccination against Lyme disease. Seropositivity was also associated with l
iving in forested and urban areas, and on sandy, fertile soils. A canine su
rveillance system is a useful method for assessing the geographic distribut
ion of Lyme disease, and in combination with a GIS, it can be effective in
determining environmental factors associated with I. scapularis endemicity.