| equine ehrlichial colitis (potomac horse fever): recognition of the disease in pennsylvania, new jersey, new york, ohio, idaho, and connecticut. | equine ehrlichial colitis (potomac horse fever), a newly identified colitis of the horse, was first recognized in maryland. in this report, we document occurrence of the disease in pennsylvania, new jersey, new york, ohio, idaho, and connecticut. enzootic areas were recognized by a characteristic pattern. frequently there was a seasonal pattern and high prevalence of sporadic colitis in unstressed horses. the attack rate per farm generally was low. horses on pasture, as well as those stabled, we ... | 1986 | 3744978 |
| geographical variation of seropositivity to ehrlichia risticii (equine monocytic ehrlichiosis) of horses in new york state. | a total of 2,579 serum samples from horses in new york state during 1985-1986 were examined for seropositivity to ehrlichia risticii using the indirect fluorescent antibody technique. cluster analysis statistical technique was used to group counties according to their estimated eme-disease rate (seropositive proportion of sampled horses). counties were clustered into 4 groups of different eme-disease rates, representing high (86% seropositive), medium (66% seropositive), medium-low (47% seroposi ... | 1994 | 8575378 |
| cross-sectional evaluation of environmental, host, and management factors associated with risk of seropositivity to ehrlichia risticii in horses of new york state. | to locate counties within new york state with a high seroprevalence among the equine population, to determine host, management, and environmental factors that were associated with seropositivity to ehrlichia risticii, and to determine evidence for arthropod- or helminth-mediated transmission of e risticii to horses. | 1996 | 8669755 |