| 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 |
| molecular analysis of neorickettsia risticii in adult aquatic insects in pennsylvania, in horses infected by ingestion of insects, and isolated in cell culture. | upon ingestion of adult aquatic insects, horses developed clinical signs of potomac horse fever, and neorickettsia risticii was isolated from the blood. 16s rrna and 51-kda antigen gene sequences from blood, isolates, and caddis flies fed to the horses were identical, proving oral transmission of n. risticii from caddis flies to horses. | 2002 | 11825999 |